CA2420732C - A screen for a shale shaker - Google Patents

A screen for a shale shaker Download PDF

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Publication number
CA2420732C
CA2420732C CA2420732A CA2420732A CA2420732C CA 2420732 C CA2420732 C CA 2420732C CA 2420732 A CA2420732 A CA 2420732A CA 2420732 A CA2420732 A CA 2420732A CA 2420732 C CA2420732 C CA 2420732C
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CA
Canada
Prior art keywords
screen
ramp
screening material
flat layer
ramps
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CA2420732A
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French (fr)
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CA2420732A1 (en
Inventor
Thomas Cole Adams
David Lee Schulte Jr.
Kenneth Wayne Seyffert
David Wayne Largent
Guy Lamont Mcclung, Iii
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Varco IP Inc
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Varco IP Inc
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Publication date
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Publication of CA2420732A1 publication Critical patent/CA2420732A1/en
Application granted granted Critical
Publication of CA2420732C publication Critical patent/CA2420732C/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/01—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons
    • B01D33/03—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements
    • B01D33/0346—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with flat filtering elements
    • B01D33/0376—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with flat filtering elements supported
    • B01D33/0384—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with flat filtering elements supported with corrugated, folded or wound filtering sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/012—Making filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
    • B01D29/07—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported with corrugated, folded or wound filtering sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/44—Edge filtering elements, i.e. using contiguous impervious surfaces
    • B01D29/445—Bar screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/70—Regenerating the filter material in the filter by forces created by movement of the filter element
    • B01D29/72—Regenerating the filter material in the filter by forces created by movement of the filter element involving vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/01—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons
    • B01D33/015—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with flat filtering elements
    • B01D33/0183—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with flat filtering elements supported
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/01—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons
    • B01D33/03—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements
    • B01D33/0346—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with flat filtering elements
    • B01D33/0376—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with flat filtering elements supported
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4618—Manufacturing of screening surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4645—Screening surfaces built up of modular elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4654—Corrugated Screening surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4663—Multi-layer screening surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4672—Woven meshes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/469—Perforated sheet-like material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/48—Stretching devices for screens
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/06—Arrangements for treating drilling fluids outside the borehole
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B2201/00—Details applicable to machines for screening using sieves or gratings
    • B07B2201/02—Fastening means for fastening screens to their frames which do not stretch or sag the screening surfaces

Abstract

A screen for a shale shaker, the screen comprising at least one layer of screening material (9) characterised in that at least one ramp (7) is located on the at least one layer of screening material (9).A shale shaker comprising a screen of the invention, the shale shaker further comprising a vibratory mechanism and a basket.A screen assembly comprising at least one layer of screening material (267) and a frame (261) having four sides members (262,263,264,265) and at least one cross member (266) between two of said sides (263,265), each member (262,263,264,265,266) having a top and a bottom characterised in that said at least one layer of screening material (267) is arranged between the bottom of a first member (262,266) and the top of an adjacent member (266,264).

Description

A SCREEN FOR A SHALE SHAKER
This invention relates to a screen for a shale shaker. The invention also relates to a shale shaker provided with a screen of the invention.
Vibratory separators have been used for many years to separate particles in a wide array of industrial applications. One common application for vibratory separators is in drilling operations to separate particles suspended in drilling mud. Such vibratory separators are known as shale shakers. If drilled solids are not removed from the drilling mud used during the drilling operation, re-circulation of the drilled solids can create weight, viscosity, and gel problems in the mud, as well as increasing wear on mud pumps and other mechanical equipment used for drilling.
A shale shaker generally includes at least one screen which is generally flat and mounted generally horizontally on a vibrating mechanism or shaker that imparts either a rapidly reciprocating linear, elliptical or circular motion to the screen. A shale shaker may comprise a series of screens arranged in tiered or flat disposition with respect to each other. The screens generally form part of a screen assembly. The screen assemblies are inserted and resiliently suspended or mounted into the shale shaker prior to use. In use, the vibrating mechanism vibrates the screen. Circulated drilling mud is poured on to a back end of the vibrating screen, usually from a pan mounted above the screen. The material generally flows toward the front end of the screen. Large particles are unable to pass through the screen, remaining on top of the screen and moving toward the front of the screen where they are collected. The smaller particles and fluid flows through the screen and collects in a pan beneath the screen. An example of a typical prior art shaker system is shown in U.S. Patent 5,190,645.
A screen may comprise a coarse screen cloth with two or more overlying layers of fine screening material, such as a wire cloth. The prior art discloses that the layers may be adhered or bonded together; and that a support, supports, or a perforated or apertured plate or frame may be used beneath the layers. The fineness or coarseness of the mesh of a screen may vary depending upon mud flow rate and the size of the solids to be removed. The screening material may be made from wire mesh, which is generally described with reference to the diameter of the wires from which it is woven, the number wires per unit length (called a mesh count) and the shape or size of the openings between wires. Wire mesh comes in various grades. "Market" grade mesh generally has wires of relative large diameter. "Mill" grade has comparatively smaller diameter wires and "bolting cloth" may have the smallest diameter wire. The type of mesh chosen depends on the application.
Many screens used with shale shakers are flat or nearly flat, i.e. substantially two-dimensional. Other screens, due to corrugated, depressed, or raised surfaces are three-dimensional. U.S. Patents 5,417,793;
5,417,858; and 5,417,859 disclose non-flat screens for use with shale shakers. The three-dimensional screens may comprise one or more layers of screening material overlaying one another. These screens have a lower planar apertured plate with a multiplicity of spaced-apart apertures or openings therethrough. Undersides of troughs of undulating screening material are bonded to the apertured plate.
PCT Publication No. WO 00/25942 discloses a screen comprising screening material having ramps formed therein. However, it has been found that, in use, the ramps are likely to be damaged before damage occurs in an equivalent flat screen. It has also been found that some large particles have difficulty climbing the ramps.
The layers of screening material need to be held together in order to inhibit excess wear due to, for example, rubbing or clashing.
It is also important to inhibit particles trapping themselves between layers of screening material. A degree of movement between the layers of screening material is required for this purpose, i.e. to have an ability to self clean.
It is also important to join the screen cloths together in a way which maximises screening area of the screens. The shale shakers are a predetermined size and it is advantageous to have the greatest possible screening area therein.
It is advantageous to be able to repair screens with relative ease and speed.
According to the present invention, there is provided a screen for a shale shaker, said screen comprising at least one substantially flat layer of screening material characterised in that at least one ramp formed of screening material is located on said at least one flat layer of screening material, said at least one flat layer of screening material having mesh size substantially equal to or smaller than the mesh size of said at least one ramp.
The invention also provides a shale shaker comprising a screen of the invention, said shale shaker further comprising a vibratory mechanism and a basket.
For a better understanding of the present invention, reference will now be made, by way of example, to the accompanying drawings, in which:
Figure 1A is a perspective view of a first embodiment of a screen in accordance with the present invention;
Figure 1B is a perspective view of a second embodiment of a screen in accordance with the present invention;
Figure 2 is a perspective view of a third embodiment of a screen in accordance with the present invention;
Figure 3A shows, in perspective, five alternative ramps arranged parallel to each other, for a screen in accordance with the present invention; Figure 3B shows end elevations of the five alternative ramps shown in Figure 3A;
Figure 4A is a perspective view of a fourth embodiment of a screen in accordance with the present invention; Figures 4B and 4C represent cross-sectional views of parts of the ramps of the screen assembly of Figure 4A; Figures 4D and 4E present alternative configurations for ramps for a screen in accordance with the present invention;
Figure 5 is a perspective view of a fifth screen in accordance with the present invention;
Figures 6A, 7A, 8A and 9A represents a side view of a piece of material, screen or mesh which is formed into the screen ramps shown, respectively in Figures 6B, 7B, 8B, 9B and 9C;
Figure 10A is a side view of a ramp of a screen in accordance with the present invention; Figure 10B shows the ramp of Figure 10A on a screen in accordance with the present invention;
Figure 11 is a side view of a ramp of a screen (as in Figure 10A) on a screen in accordance with the present -invention;
Figures 12A to 12C are each a side view of a screen in accordance with the present invention, shown in use at various stages of operation with a representative piece 5 of material ;
Figure 13A is a top view of ramps in accordance with the present invention; Figure 13B is a cross-section view of the screen assembly of Figure Figure 14 is a cross-section view of a screen assembly according to the present invention.
Figure 15 is a cross-section view of a screen assembly according to the present invention.
Figure 16 is a perspective view of a channel member for a screen according to the present invention.
Figures 17A and 17B are cross-section views of channel members for a screen according to the present invention.
Figure 17C presents perspective views of channel members for a screen according to the present invention.
Referring to Figure 1A, there is shown a screen assembly 100 which has a tubular frame 2 comprising interconnected outer frame members 3, 4, 5, 6 and crossbars 7, 8 each with two spaced-apart ends connected to an outer frame member.
Screening material 9 is located over the crossbars 7, 8 and attached to the outer frame side members 3, 5 and outer frame end members 4, 6 (and, may also be connected to the crossbars 7, 8) by any suitable known method, connectors, glue, welding, etc. The screening material 9 may be any known screen and/or mesh; in any combination of one, two, three or more layers; connected, fused, glued, and/or sintered together in any known way either substantially over the entire surface of screening material or only in portions thereof.
Connected on top of the screening material 9 are a plurality of spaced-apart ramps 10 each with a base 12 and a portion 14 projecting up from the screening material 9. As shown there is an obtuse angle a between each ramp's base 12 and projecting portion 14. The angle a may be any desired angle from zero to one hundred eighty degrees (i.e., acute, right, obtuse or straight angle). In certain aspects the base portion of one, some or all of the ramps may be deleted, and the projecting portions alone are connected to the screening material.
The ramps (and any other screen component disclosed herein for connection to a screen assembly) (the bases and/or the projecting portions) may be connected to the screening material with any suitable connector or method, including, but not limited to, with screws, rivets, welding, gluing, releasable cooperating hook-loop fastener material, solder, adhesive, tape (single or double-sided), and/or sintering.
As shown in Figure IA a line 11 defining a boundary between each ramp base and projecting portion is located above a crossbar 7 and portions of each base are over parts of the crossbars 8. It is within the scope of this invention for these ramp base portions to also be connected to these cross bar portions as well as to the screening material; alternatively, there is no such connection, connection only to the crossbars 7, or connection only to the crossbars 8 (as can be the case for any screen assembly according to the present invention).
Figure 1B shows second embodiment of a screen assembly, generally identified by the reference numeral 100a. Parts like those shown in Figure la are identified with the same reference numerals. In the screen assembly 100a, the ramp bases 12 are positioned above the crossbars 7 with the lines 11 located between crossbars, i.e., not over a crossbar. Alternatively, it is within the scope of this invention to place one or some of the ramps as in Figure 1A and one or some of the ramps as in Figure 1B. Also as shown the ramps are generally parallel to the crossbars 7 and the outer frame members 4, 6; but it is within the scope of this invention for the ramps to be at an angle to these items and, in one aspect for different ramps to be at different angles, for example, but not limited to, a plurality of spaced-apart ramps with every other ramp at one angle and the ramps between them at a different angle - which in one aspect includes ramps with an acute angle between adjacent ramp ends.
Figure 2 shows a third embodiment of a screen assembly 20 which has two spaced-apart hook strips 22 between which and to which are connected a plurality of spaced-apart support strips 24, which may be flexible, in that the screen assembly may be stretched over a curved or flat surface and held in position by clamps tensioning the screen assembly via the hook strips 22. Screening material 29 is arranged on the support strips 24 and between the hook strips 22. The screening material 29 may be of the type referred to in Figures 1A & 1B and may include a diamond-patterned layer 28 of, for example, metal, glue, plastic, adhesive, rubber, or epoxy to adhere multiple layers of screening material 29 together and, may also adhere the layer or layers of screening material 29 to the support strips 24. A plurality of ramps, like the ramps 10 above, are connected to the screening material 29. A line 25 defining a boundary between a base and a projecting portion 27 of each ramp is located above a strip 24; but it is within the scope of this invention, as with the screen assembly of Figure 1A, to locate this line as desired. The hook strips 22 may be of any known shape and/or configuration for hooking apparatus for shale shakers and vibratory separators (including but not limited to any known side channels, hooks, or strips for mounting a screen to a shale shaker).
Figure 3A discloses a five alternative ramps (31 -35) useful with any screen assembly and which may be used instead of any ramp shown on any screen assembly herein;
alternatively, a combination of any of these ramps on a single screen assembly may be used according to the present invention.
Figure 3B shows end views of the ramps of Figure 3A.
Certain of the ramps have an enclosed area and, therefore, an end which, may be open or closed (for example, as in ramps 31, 33, 34, 35) . It is within the scope of this invention to leave these ramp ends open;
partially open (for example, top, bottom, one side or the other side closed off); or closed off either with solid material or with screen or mesh (as shown in the ramps 31 and 33 closed off, respectively with screening material 36, 38). Screening material used to close off or partially close off a ramp end may be any screening material disclosed herein and the ramp ends thus closed-off may be flat (i.e. perpendicular to the surface of the screen assembly) or non-flat, for example, as disclosed in PCT Publication No. WO 01/19492 (and USSN 09/634,610 filed 8/5/00). The ramps 31, 33, 34, 35 each has a base 41, 43, 44, 45, respectively, with portions on either side of a projecting ramp portion 51, 53, 54, 55, respectively. Suitable connection of these base portions on either or both sides of the projecting portions may be made to screening material of a screen assembly according to the present invention. It is also within the scope of the present invention to fold either or both base portions either under or over prior to attaching the ramps to a screen assembly.
Figure 4A shows a screen assembly 60 comprising an outer frame with interconnected frame members 61, 62, 63, 64 (however it is within the scope of this invention for the ramps of the screen 60 to be used on a screen like that in Figure 2 that has hookstrip sides) . Ramps 71 -75 are connected to screening material 69.
In one aspect the ramps 71 - 75 are made of mesh or screen or a combination thereof that can be folded down or pushed down and remains in the "down" position, i.e., it has memory. As indicated any desired part of a ramp may be positioned lower than the other parts.
Ramp 71 has a base 71a, a projecting portion 71b, and a portion 71c that has been pushed down. Figure 4A
shows an end view of the ramp 71 and Figure 4B shows a cross-section view of the lower portion 71C. Ramp 72 has lower, pushed down portions 72c; ramp 73 has lower, pushed down portions 73c and 73d; ramp 74 has lower pushed down portions 74c; and ramp 75 has lower pushed down portions 75c. Alternatively, the ramps 71 - 75 are preformed of suitable material which has no memory (does not retain a shape, position, or configuration into which it is pressed, pushed, or moved), for example, metal, rubber, or solid plastic (with or without fluid-passing perforations across its surface). All of the ramps of a particular screen assembly according to the present invention may be like any one of the ramps 71 - 75; or any combination of such ramps may be used according to the present invention. It is also within the scope of this invention to make different parts of a ramp out of different screening material. For example, in the ramp 71 the base 71a and part 71b may be made from screening material of a mesh size similar to that of the screening material 69 and the portion 71c may be made of a much finer mesh that lays down (rather than a mesh with memory that needs to be pushed or folded down). Upper or projecting portions of the ramps (for example, portions -71b, 27, 14) may be made of non-memory material that is so non-rigid that it moves up and down or flaps uncontrollably as the screen assembly is vibrated (for example, a shale shaker processing fluid with drilling 5 mud and drill cuttings or other solids entrained therein). Any projecting portion or upper portion of a screen or ramp disclosed herein may be made of multiple layers, for example, a non-memory movable layer with a one, two, or more lower and/or upper layer(s) of metal or 10 of synthetic material, perforated or not, to inhibit or prevent up/down or uncontrollable flapping and/or to inhibit or prevent wear of and damage to such a non-memory layer. Optionally, different parts of a single projecting portion may have one or more of these reinforced areas along the length of the projecting portion. In one aspect a coarse mesh is used beneath a projecting portion and a fine mesh is used on top so that fine solids or particles separated from a fluid more easily climb up the projecting portion. Alternatively, a reinforcing material (mesh, screen, solid) may be used around the top, bottom, and/or side edges of a projecting portion to strengthen the projecting portion. Also, an upstanding ramp portion or a front ramp portion may be made of a very coarse mesh, for example, 19 mesh, for strength and stability.
Figures 4D and 4E illustrate other possible ramp end profiles for ramps 76, 77 and relative sizes for base and projecting portions which may be used for any ramp herein. Also any number (for example, one, two, three, four, five, six, or more) of any ramp 71 - 75 may be used on any screen.
Figure 5 shows a screen assembly 80 according to the present invention which has an outer frame 88 (like the frame of the screen 60) with crossbars and screening material 89 like that of the screen 60. Ramps 81 to 85 represent any ramp according to the present invention.
As shown, the ramps are offset from each other, as may be any two ramps of any screen assembly according to the present invention and any number (for example, one, two, three, four, five, six, or more) of any ramp may be used.
Also any portion of any ramp may be deleted providing a flow path through that ramp at that area. In one particular embodiment central portions for example, between one and fourteen inches wide, are deleted from alternating ramps, beginning with ramp 81 or with ramp 82.
Figure 6A shows a piece of screening material 90 which may be any screening material or combination thereof disclosed herein. As shown in Figure 6B, the screening material 90 has been formed or folded to form upwardly-projecting portions 91 and 92 that can serve as ramps for any screen assembly according to the present invention with one or more such ramps. As shown the lower ends of the upwardly projecting portions are open;
but it is within the scope of the present invention to close off these ends (or the ends of any ramp disclosed herein) with solids material or with material such as screen or mesh that permits fluid flow therethrough.
Figure 7A shows a piece of screening material 200 which may be any screening material disclosed herein. As shown in Figure 7B the screening material 200 has been formed or folded to make a ramp 201 with an inclined portion 202 and a wall portion 203. The area under the ramp may be open or closed off (with solids or with fluid-passing material).
Figure 8A shows a piece of screening material 210 which may be any screening material disclosed herein. As shown in Figure 8B the screening material 210 has been formed or folded to make a ramp 211 with an inclined portion 212 and a front portion 213. The open area under the inclined portion may be open or closed off (with solids or with fluid-passing material). The front portion 113 is shown as contacting the screening material 210. It is within the scope of this invention to also connect the front portion 213 to the screening material 210 either all along the length of a ramp with such a profile or at spaced-apart points along the length.
Figure 9A shows a piece of screening material 220 which may be any screening material disclosed herein. As shown in Figure 9B the screening material 220 has been formed or folded to make a ramp 221 with an inclined portion 222 and a front portion 223. The open area (223a) under the inclined portion may be open or closed off (with solids or with fluid-passing material). The front portion 223 is shown as contacting the screening material 220. It is within the scope of this invention to also connect the front portion 223 to the screening material 220 either all along the length of a ramp with such a profile or at spaced-apart points along the length. Figure 9C shows another ramp 224 made (formed or folded) with the screening material 220. The ramp 224 has an inclined portion 225, a front portion 226 and a lower portion 227. The front portion 226 may be connected to the screening material at points or all along its length, as may be the lower portion 227. Also the end of the lower portion 227 may touch or be connected to the inclined portion 225. Alternatively, the portion 227 may extend out in front of the ramp rather than beneath the portion 224.
Figure 10A shows an end profile of a ramp 230 according to the present invention, for example, like the ramp 35 above, Figure 3A. Figure 1OB shows the ramp 230 in place connected to screening material 231 which has an upwardly projecting portion 232 (formed or folded into the screening material) . The ramp 230 may be connected to the portion 232. Any ramp according to the present invention with a raised portion may be so-positioned above any screening material disclosed herein with an upwardly-projecting portion.
Figure 11 shows a ramp 240 (end view or cross-section) according to the present invention (like the ramp 230 ) connected to screening material (any disclosed herein or any combination thereof) 241 with welds, connectors or glue 243 (any one of which or all but one may be deleted). An upwardly-projecting portion 242 of the screening material 241 has been formed or folded to correspond in shape to the projecting portion of the ramp 240. For any shape ramp according to the present invention screening material can be formed or shaped to correspond in shape to a ramp shape for positioning of and/or connection of a ramp to screening material. Any ramp described herein as made or formed of screening material may be made or formed of one, two, three or more layers of screening material and/or mesh.
Figure 12A shows a screen 250 according to the present invention with screening material 251 (any disclosed herein or any combination thereof) with spaced-apart ramps 252 connected to the screening material (which may be any ramp herein including, but not limited to, any ramp herein that is a separate piece connected to screening material or any ramp folded from screening material). A mass of solids 253 (for example, solids separated from drilling mud flowing across the screen 250 in a shale shaker) is moving over the screen 250. As shown in Figure 12B, the ramps 252 are configured, sized, and made of such material that the mass of solids 253 moves the ramps downwardly as it passes over them, facilitating movement of the mass of solids across the screen. As shown in Figure 12C the ramp that was moved down by the mass of solids has moved or sprung back to its initial position. In certain prior art machines, a relatively large mass or conglomeration of separated solids might not be able to climb or be moved over an upwardly projecting portion or ramp of a screen.
Figure 13A shows a screen 260 according to the present invention which has a frame 261 made of frame members 262, 263, 264, 265 with a plurality of cross members 266. Between pairs of frame members and cross members, and between pairs of cross members are connected pieces 267 of screening material (any disclosed herein or any combination thereof). Alternatively, a single piece of screening material may be placed over the frame 261 and folded to result in screen part placement as in Figure 13B.
Figures 14, 15 and 16 illustrate various types of frame and cross members useful in screens as in Figure 13A. Figure 14 shows a screen 270 with cross members 271 and frame members 273 having a "C" channel shape when viewed in cross-section; and an end 244 of a piece of screening material 275 is in and connected to each channel.
Figure 15 shows a channel member 280 which may be used for a frame or cross member, for example,, but not limited to, in the screens 260 and 270. The channel member 280 has a lower portion 181 on which an end 282 of screening material 283 is placed and to which it is connected. Such a channel may be used for a screen as in Figure 13A. Figure 16 shows a channel member 273a, like the channel member 273, but with holes 273b therethrough.
Figures 17A and 17B show alternative frame and cross member profiles 295a, 295b, 295c, 295d and 296a, 296b, 296c, 296d, 296e, respectively (cross-section) for any of the frame or cross members disclosed above (with or without holes in any or all of the parts of the profiles).
Figure 17C illustrates that any cross member in any frame according to the present invention may have perforations along its length to facilitate solids separation. As shown in cross-section, channel members 290a, 290b, 290c and 290d (shown in cross-section) have holes h therethrough along their lengths. Any series of holes may be deleted from any channel member.

Claims (17)

CLAIMS:
1. A screen for a shale shaker, said screen comprising at least one substantially flat layer of screening material characterised in that at least one ramp formed of screening material is located on said at least one flat layer of screening material, said at least one flat layer of screening material having mesh size substantially equal to or smaller than the mesh size of said at least one ramp.
2. A screen as claimed in Claim 1, wherein said at least one ramp comprises a rectangular piece of screening material having a fold along a substantially straight line along the rectangle's length, forming a first portion adhered or otherwise attached to said at least one flat layer of screening material and a second portion extending therefrom to form a ramp portion.
3. A screen as claimed in Claim 1 or 2, wherein said at least one ramp comprises a further flat layer of screening material substantially the same size as the at least one flat layer of screening material, said further flat layer of screening material having folds therein forming at least one ramp portion.
4. A screen as claimed in any one of Claims 1 to 3, wherein said ramp is deformable, in use and, if deformed remains in its deformed state.
5. A screen as claimed in any one of Claims 1 to 3, wherein said ramp is reactively deformable, such that, in use, said ramp may deform and subsequently return to substantially its original state.
6. A screen as claimed in any one of Claims 1 to 5, wherein said at least one flat layer of screening material has at least one side, said at least one ramp arranged substantially perpendicularly thereto.
7. A screen as claimed in any one of Claims 1 to 6, wherein said at least one ramp has at least one of the following profiles: flap; wedge shaped; semi-circular;
triangular; and wave-like.
8. A screen as claimed in any one of Claims 1 to 7, wherein said at least one ramp is attached to said at least one flat layer of screening material by one of the following means: fasteners; glue or otherwise adhered;
welded; and soldered.
9. A screen as claimed in any one of Claims 1 to 8, wherein said ramp has ends, said ends being open.
10. A screen as claimed in any one of Claims 1 to 8, wherein said ramp has ends, said ends covered in screening material.
11. A screen as claimed in any one of Claims 1 to 8, wherein said ramp has ends, said ends covered in a solid material to block the passage of material therethrough.
12. A screen as claimed in any one of Claims 1 to 11, comprising a plurality of said at least one ramps, spaced apart along said screen.
13. A screen as claimed in Claim 12, wherein said plurality of spaced apart ramps are aligned with each other.
14. A screen as claimed in Claim 12, wherein said plurality of spaced apart ramps are alternately offset from each other.
15. A screen as claimed in any one of Claims 1 to 14 further comprising a further flat layer of screening material arranged beneath said at least one flat layer of screening material.
16. A screen as claimed in any one of Claims 1 to 15, further comprising a layer of coarse mesh arranged beneath said at least one flat layer of screening material.
17. A screen as claimed in any one of Claims 1 to 16, further comprising strips, said at least one flat layer of screening material arranged thereon.
CA2420732A 2000-10-25 2001-10-17 A screen for a shale shaker Expired - Lifetime CA2420732C (en)

Applications Claiming Priority (3)

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US09/696,662 2000-10-25
US09/696,662 US6629610B1 (en) 1993-04-30 2000-10-25 Screen with ramps for vibratory separator system
PCT/GB2001/004599 WO2002034358A2 (en) 2000-10-25 2001-10-17 A screen for a shale shaker

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CA2420732A1 CA2420732A1 (en) 2002-05-02
CA2420732C true CA2420732C (en) 2011-01-04

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US (1) US6629610B1 (en)
EP (1) EP1333904B1 (en)
AT (1) ATE320296T1 (en)
AU (1) AU2001294053A1 (en)
CA (1) CA2420732C (en)
DE (1) DE60118017D1 (en)
NO (1) NO327472B1 (en)
WO (1) WO2002034358A2 (en)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7264125B2 (en) * 2003-04-23 2007-09-04 Derrick Corporation Undulating molded plastic vibratory screen
GB0506332D0 (en) * 2005-03-30 2005-05-04 British Nuclear Fuels Plc Separation method
SE528312C2 (en) 2005-05-31 2006-10-17 Sandvik Intellectual Property Viewing device
EP1994256A1 (en) * 2006-03-10 2008-11-26 Tega Industries Limited An improved screening device
GB2451263B (en) * 2007-07-25 2012-04-11 United Wire Ltd Plugs for repairing sifting or filtering screens
GB2451264B (en) * 2007-07-25 2012-03-28 United Wire Ltd Plugs for repairing sifting or filtering screens
CA2623992C (en) * 2008-02-15 2011-02-08 Screenex Manufacturing (Pty) Ltd. Screen panels
NO336396B1 (en) * 2009-10-27 2015-08-10 Optipro As An improved cell insert filter for a screening machine filter
US9643111B2 (en) 2013-03-08 2017-05-09 National Oilwell Varco, L.P. Vector maximizing screen
CN103203292A (en) * 2013-03-17 2013-07-17 徐州雷曼机械科技有限公司 Wedged double-layer balance mud screen for cast-in-place pile mud purification unit
CN105263598A (en) * 2013-04-30 2016-01-20 M-I钻井液英国有限公司 Screen having frame members with angled surface(s)
US9849485B2 (en) * 2013-10-22 2017-12-26 M-I Drilling Fluids Uk Ltd System, apparatus and/or method for repairing sifting and/or filtering screens using plugs with a mesh layer
US10369501B2 (en) 2016-05-03 2019-08-06 M-I Drilling Fluids Uk Ltd. Apparatus, system and method for combining modular repair plugs
US10428606B2 (en) 2017-07-12 2019-10-01 Saudi Arabian Oil Company Collecting drilling microchips
CN109248851A (en) * 2018-08-24 2019-01-22 红塔烟草(集团)有限责任公司 A kind of method and apparatus reducing stalk label content in ramuscule cigarette shreds
US11280178B2 (en) 2020-03-25 2022-03-22 Saudi Arabian Oil Company Wellbore fluid level monitoring system
US11414963B2 (en) 2020-03-25 2022-08-16 Saudi Arabian Oil Company Wellbore fluid level monitoring system
US11125075B1 (en) 2020-03-25 2021-09-21 Saudi Arabian Oil Company Wellbore fluid level monitoring system
US11161151B1 (en) * 2020-04-23 2021-11-02 National Oilwell Varco, L.P. Screen assembly for vibratory separation
US11414985B2 (en) 2020-05-28 2022-08-16 Saudi Arabian Oil Company Measuring wellbore cross-sections using downhole caliper tools
US11414984B2 (en) 2020-05-28 2022-08-16 Saudi Arabian Oil Company Measuring wellbore cross-sections using downhole caliper tools
US11631884B2 (en) 2020-06-02 2023-04-18 Saudi Arabian Oil Company Electrolyte structure for a high-temperature, high-pressure lithium battery
US11391104B2 (en) 2020-06-03 2022-07-19 Saudi Arabian Oil Company Freeing a stuck pipe from a wellbore
US11149510B1 (en) 2020-06-03 2021-10-19 Saudi Arabian Oil Company Freeing a stuck pipe from a wellbore
US11719089B2 (en) 2020-07-15 2023-08-08 Saudi Arabian Oil Company Analysis of drilling slurry solids by image processing
US11255130B2 (en) 2020-07-22 2022-02-22 Saudi Arabian Oil Company Sensing drill bit wear under downhole conditions
US11506044B2 (en) 2020-07-23 2022-11-22 Saudi Arabian Oil Company Automatic analysis of drill string dynamics
US11867008B2 (en) 2020-11-05 2024-01-09 Saudi Arabian Oil Company System and methods for the measurement of drilling mud flow in real-time
US11434714B2 (en) 2021-01-04 2022-09-06 Saudi Arabian Oil Company Adjustable seal for sealing a fluid flow at a wellhead
US11697991B2 (en) 2021-01-13 2023-07-11 Saudi Arabian Oil Company Rig sensor testing and calibration
US11572752B2 (en) 2021-02-24 2023-02-07 Saudi Arabian Oil Company Downhole cable deployment
US11727555B2 (en) 2021-02-25 2023-08-15 Saudi Arabian Oil Company Rig power system efficiency optimization through image processing
US11846151B2 (en) 2021-03-09 2023-12-19 Saudi Arabian Oil Company Repairing a cased wellbore
US11624265B1 (en) 2021-11-12 2023-04-11 Saudi Arabian Oil Company Cutting pipes in wellbores using downhole autonomous jet cutting tools
US11867012B2 (en) 2021-12-06 2024-01-09 Saudi Arabian Oil Company Gauge cutter and sampler apparatus

Family Cites Families (183)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US500302A (en) 1893-06-27 Slate-picker
US236416A (en) 1881-01-11 William o
US516673A (en) 1894-03-20 Sieve
US275340A (en) 1883-04-03 kimball
US40242A (en) 1863-10-13 Improvement in grain-sieves
US607598A (en) 1898-07-19 Grain-separating screen for th resh ing-ivlach in es
US526562A (en) 1894-09-25 Coal-screen
US583981A (en) 1897-06-08 Fruit-grading machine
US275190A (en) 1883-04-03 Sieve for roller-mills
US268491A (en) 1882-12-05 hubbell
US246144A (en) 1881-08-23 Fanning-mill
US2677462A (en) 1954-05-04 conkling
US560858A (en) 1896-05-26 missroon
US777317A (en) 1904-03-25 1904-12-13 John A Traylor Shaking ore-screen.
US865185A (en) 1906-11-24 1907-09-03 Stephen J Kerrigan Slate-jig.
US964897A (en) 1908-04-04 1910-07-19 Noah Bryant Save-all for paper-making machines.
US966578A (en) 1908-04-20 1910-08-09 Sherman P Murphy Screen for threshing-machines.
US948222A (en) 1909-04-14 1910-02-01 Clarence W Honabach Shaking-screen.
US984866A (en) 1909-05-06 1911-02-21 Earl H Tate Aero ore-concentrator and placer-machine.
US1132667A (en) 1910-06-16 1915-03-23 Louis Milliot Florist's dirt-sieve.
US1098979A (en) 1912-01-22 1914-06-02 Karl Schuchard Jigging-machine.
US1064297A (en) * 1912-02-21 1913-06-10 Charles R Dennison Placer-mining machine.
US1082612A (en) 1912-10-01 1913-12-30 Lawrence William Smith Fruit-grading machine.
US1139041A (en) 1914-09-05 1915-05-11 Ole L Larson Corrugated rotary sieve.
US1242982A (en) 1916-10-16 1917-10-16 Tyler Co W S Screening device.
US1250768A (en) 1916-10-20 1917-12-18 Charles Hunnicutt Seed-corn grader.
US1248081A (en) 1916-12-27 1917-11-27 Carrie S Couch Flour-sifter.
US1359426A (en) 1919-06-11 1920-11-16 Williams Patent Crusher & Pulv Cage for grinders
US1423021A (en) 1919-09-22 1922-07-18 Tyler Co W S Screening apparatus
US1344747A (en) 1919-11-07 1920-06-29 Charles V Wright Shaking-screen
US1626774A (en) 1920-02-03 1927-05-03 Farley G Clark Method of welding and product thereof
US1614586A (en) 1920-02-27 1927-01-18 E D Anderson Inc Machine for separating articles
US1397339A (en) 1920-07-22 1921-11-15 Sturtevant Mill Co Screen-separator
US1505735A (en) 1922-04-12 1924-08-19 Albert H Stebbins Table concentrator
US1462804A (en) 1922-04-18 1923-07-24 Evans Edward James Sieve
US1713143A (en) 1924-02-23 1929-05-14 Gustave A Overstrom Vibrating screen
US1561632A (en) 1924-02-27 1925-11-17 Herbert S Woodward Perforated indented screen
US1716758A (en) 1924-12-03 1929-06-11 Bland John Process of separating mica
GB269877A (en) 1926-04-23 1928-04-19 Hermann Schubert Improvements in sifting apparatus
US1678941A (en) 1927-06-09 1928-07-31 Tyler Co W S Method of making woven-wire screens
US1785195A (en) 1928-02-07 1930-12-16 Wind Blast Chaffer Company Chaffer for thrashing machines and grain harvesters
US1822298A (en) 1929-11-08 1931-09-08 Kerrigan Stephen Joseph Slate jig
US1879377A (en) 1929-12-03 1932-09-27 James W Mcneely Screen and method of making the same
US1950861A (en) 1931-03-19 1934-03-13 Sr Edward O'toole Method and apparatus for feeding and separating dry coal from refuse
US1997740A (en) 1931-12-24 1935-04-16 Tyler Co W S Plural cloth screening apparatus
US2052467A (en) 1931-12-30 1936-08-25 Hermann Rudolf Wire sifting screen
US1997713A (en) 1932-08-08 1935-04-16 Tyler Co W S Screen and method of making same
US2061850A (en) 1934-01-29 1936-11-24 Western States Machine Co Filtering element and the art of producing the same
US2082513A (en) 1934-07-26 1937-06-01 Western States Machine Co Filter sieve and art of making the same
US2104785A (en) 1934-12-10 1938-01-11 Swan M Akeyson Vibrating endless screen
US2089548A (en) 1935-03-12 1937-08-10 Colorado Fuel & Iron Corp Means of filtration
US2075747A (en) * 1936-02-29 1937-03-30 Nolte Otto Dry placer machine
GB519680A (en) 1938-09-22 1940-04-03 James Walker Improvements in or relating to strainer plates and drums
US2251909A (en) 1939-01-23 1941-08-12 Rotospray Mfg Company Separation of solid material from liquid material
US2274700A (en) 1939-02-14 1942-03-03 Tyler Co W S Screening apparatus
US2190262A (en) 1939-03-17 1940-02-13 Geist Adolf Shaker pan
US2335084A (en) 1940-04-29 1943-11-23 Mission Rubber Company Sifter
US2462878A (en) 1942-11-23 1949-03-01 Mining Process & Patent Co Vibrating screen with vacuum control therefor
US2406051A (en) 1943-06-26 1946-08-20 Paul Porzelt Apparatus for producing corrugated structures
US2394378A (en) * 1943-08-07 1946-02-05 Hercules Powder Co Ltd Riffler for cellulose stock
US2457018A (en) * 1944-12-16 1948-12-21 Hewitt Robins Inc Dewatering screen
US2480320A (en) 1945-02-10 1949-08-30 Vic Cleaning Machine Co Filter
US2511239A (en) 1947-01-13 1950-06-13 Simplicity Eng Co Screen cloth anchoring and tensioning means
US2648441A (en) 1948-01-17 1953-08-11 Productive Equipment Corp Vibrating equipment
US2670079A (en) 1949-09-20 1954-02-23 Iii Fred K Betts Attachment for vibratory screens
US2667975A (en) 1950-03-03 1954-02-02 Rudolph V Seaholm Self-cleaning strainer
US2723032A (en) 1950-12-18 1955-11-08 Mining Process & Patent Co Vibrating screens
US2726184A (en) 1952-11-01 1955-12-06 Purolator Products Inc Method of providing seals for filters
US2774477A (en) 1954-12-06 1956-12-18 Iowa Mfg Co Cedar Rapids Screen clamping mechanism
US2827169A (en) 1954-12-07 1958-03-18 Internat Pulp Products Inc Screen plate
US2813629A (en) 1955-10-14 1957-11-19 John B Brugmann Screen support
US2800227A (en) 1955-11-16 1957-07-23 Kiger Fred Lime sifter
GB823648A (en) 1956-09-27 1959-11-18 Air Maze Corp Filters for fluids
US2902165A (en) 1957-03-04 1959-09-01 Multi Metal Wire Cloth Co Inc Filter leaf and method of assembling it
US2923410A (en) * 1957-04-29 1960-02-02 Tschmelitsch Florian Portable flexible sluice box
US2980208A (en) 1957-05-21 1961-04-18 Delbag Luftfilter Gmbh Filter element for extremely fine dust
US2973865A (en) 1957-09-17 1961-03-07 John F Cibula Rocker screen vibrating machine with undulated screen cloth
US3057481A (en) 1958-06-12 1962-10-09 Pall Corp Corrugated filter and method of forming the same
US2985303A (en) 1958-09-18 1961-05-23 Wright Wilbur Quick change, cartridge type, sizing screen, for asphalt plant
US2929464A (en) 1959-05-18 1960-03-22 Vernco Corp Flat knit filter media
US3070231A (en) 1959-11-23 1962-12-25 Aggregates Equipment Inc Screening device
US3165473A (en) 1960-10-24 1965-01-12 Pall Corp Corrugated filter unit
US3092573A (en) 1961-06-26 1963-06-04 Jordan W Lambert Vibrating screen clamp mechanism
US3176843A (en) 1962-01-09 1965-04-06 Entoleter Screen tensioner
US3255885A (en) 1963-02-27 1966-06-14 Nordberg Manufacturing Co Vibrating screen
US3285413A (en) 1964-03-23 1966-11-15 Selector S Aggregates Co Ltd Screen apparatus
US3243943A (en) 1964-06-15 1966-04-05 American Air Filter Co Unit filter construction
US3542636A (en) 1965-07-28 1970-11-24 Kurt Wandel Corrugated board
US3465413A (en) 1966-10-25 1969-09-09 Universal Filters Inc Method of manufacturing pleated filters
US3458978A (en) 1967-09-12 1969-08-05 Davis Ind Equipment Ltd Non-planar filter and supporting means
US3574103A (en) 1968-09-06 1971-04-06 Atomic Energy Commission Laminated cellular material form
GB1287851A (en) 1969-03-05 1972-09-06
US3747770A (en) 1969-06-20 1973-07-24 Zurn Ind Inc Filter screen
US3716138A (en) 1970-05-13 1973-02-13 Hoyt Wire Cloth Co Screen
US3679057A (en) 1970-09-11 1972-07-25 Damasco Rodolfo Adelto Perez Screen filter pack and method for making same
US3747772A (en) 1971-05-21 1973-07-24 Parker Hannifin Corp Filter
US3853529A (en) 1971-06-09 1974-12-10 Farr Co Pleated air filter cartridge
US3789498A (en) 1971-11-01 1974-02-05 Ambac Ind Method of diffusion bonding
GB1412975A (en) 1971-11-18 1975-11-05 Kralovopolska Strojirna Filters
US3793692A (en) 1972-12-12 1974-02-26 American Air Filter Co Fluid treating filter
US3900628A (en) 1973-06-13 1975-08-19 Linatex Corp Of America Pretensioned screen panel
US3970549A (en) 1973-06-18 1976-07-20 Linatex Corporation Of America Screen assembly and dewatering technique
US3929642A (en) 1974-03-07 1975-12-30 Linatex Corp Of America Dewatering system
US4033865A (en) 1974-12-09 1977-07-05 Derrick Manufacturing Corporation Non-clogging screen apparatus
US3943054A (en) 1974-12-19 1976-03-09 Durex Products, Inc. Segmented screen body
US4022596A (en) 1975-08-27 1977-05-10 Pedersen George C Porous packing and separator medium
US4019987A (en) 1976-01-14 1977-04-26 Leonard L Extended area filters
US4075106A (en) 1976-05-07 1978-02-21 Masahiko Yamazaki Filtering device
US4065382A (en) 1976-06-16 1977-12-27 Derrick Manufacturing Corporation Multiple screen apparatus
GB1575312A (en) 1976-11-30 1980-09-17 Thule United Ltd Vibratory sifting machines
US4138303A (en) 1977-04-21 1979-02-06 Taylor Sr John J Method of forming screen packs
CA1107243A (en) 1977-09-13 1981-08-18 Anthony J. Kent Spring-loaded screen clamping system in a vibratory sifting machine
GB1578948A (en) 1977-10-26 1980-11-12 United Wire Group Ltd Sifting screens
GB1604062A (en) 1978-01-11 1981-12-02 United Wire Group Ltd Coverings for submersible or semi-submersible structures
DE2912228A1 (en) 1979-03-28 1980-10-09 Ludwig Krieger Draht Und Kunst Sieve base with easily replaceable sieve parts - having sheet metal carrier as support part, useful for existing sieving machines
GB2055597B (en) 1979-08-09 1983-02-23 Pa Management Consult Vibratory screening apparatus for screening liquids
US4380494A (en) 1980-04-14 1983-04-19 Litton Systems, Inc. Vibrating screen with self-supporting screen cloth
GB2085744B (en) 1980-10-20 1984-06-13 Thule United Ltd Vibratory screening apparatus
US4410427A (en) 1981-11-02 1983-10-18 Donaldson Company, Inc. Fluid filtering device
EP0080288B1 (en) 1981-11-24 1987-10-07 Imperial Chemical Industries Plc Electrolytic cell of the filter press type
GB2124099B (en) 1982-07-24 1986-07-30 Parnaby Cyclones International Dewatering and compacting screen
CA1208864A (en) 1982-09-14 1986-08-05 Andrew M. Bews Marine antifouling materials and markers
US4546783A (en) 1983-05-02 1985-10-15 Flo Trend Shares, Inc. Apparatus for washing drill cuttings
US4472473A (en) 1983-07-01 1984-09-18 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Curved cap corrugated sheet
EP0154845A3 (en) 1984-02-24 1986-06-18 Sartorius GmbH. Flat filter element for the filtration of fluids
US4575421A (en) 1984-03-08 1986-03-11 Derrick Manufacturing Corporation Non-clogging wear-reducing screen assembly for vibrating screening machine
US4582597A (en) 1984-04-04 1986-04-15 Sweco, Incorporated Vibratory screen separator
GB8418658D0 (en) 1984-07-21 1984-08-22 Thule United Ltd Filtering screens
GB2175222B (en) 1984-07-21 1989-04-26 Thule United Ltd Improvements in filtering screens
GB2162091B (en) 1984-07-21 1988-01-27 Thule United Ltd Filtering or sifting screens
US4617122A (en) 1984-08-01 1986-10-14 Donaldson Company, Inc. Crimp seal pleated filter assembly
US4634535A (en) 1985-03-25 1987-01-06 Lott W Gerald Drilling mud cleaning method and apparatus
GB8514983D0 (en) 1985-06-13 1985-07-17 Thule United Ltd Screen clamping
GB8514982D0 (en) 1985-06-13 1985-07-17 Thule United Ltd Screen clamping
US4819809A (en) 1985-09-09 1989-04-11 Derrick Manufacturing Corporation Reinforced polyurethane vibratory screen
US4857176A (en) 1986-08-04 1989-08-15 Derrick Manufacturing Corporation Reinforced molded polyurethane vibratory screen
US4696751A (en) 1986-08-04 1987-09-29 Dresser Industries, Inc. Vibratory screening apparatus and method for removing suspended solids from liquid
US4769968A (en) 1987-03-05 1988-09-13 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Truss-core corrugation for compressive loads
US4820407A (en) 1987-04-24 1989-04-11 Cpi Sales, Inc. Solids screens
GB2206501B (en) 1987-07-07 1990-11-21 Thule United Ltd Filtering screens
US4940500A (en) 1987-08-31 1990-07-10 Tsuchiya Mfg. Co., Ltd. Filter medium forming system and process
GB2210292B (en) 1987-09-26 1991-07-03 Polydeck Screen Corp Screening panels and screen decks
US4954249A (en) 1988-06-10 1990-09-04 Beloit Corporation Wave screen plate
US5084178A (en) 1988-06-15 1992-01-28 Pall Corporation Corrugated filter arrangement with support layer and flow channels
US4832834A (en) 1988-07-11 1989-05-23 Baird Jr Howard R Elastomer sieve screen
US4882054A (en) 1988-08-22 1989-11-21 Derrick Manufacturing Corporation Vibratory screening machine with tiltable screen frame and adjustable discharge weir
US5137622A (en) 1988-09-27 1992-08-11 United Wire Limited Filter screen assembly
AU608392B2 (en) 1988-09-29 1991-03-28 Manfred Franz Axel Freissle Screening arrangement
US4962858A (en) * 1988-10-03 1990-10-16 John C. Newman Cleaning sluice boxes
DE8812647U1 (en) 1988-10-08 1988-12-01 Ludwig Krieger Draht- Und Kunststofferzeugnisse Gmbh, 7500 Karlsruhe, De
DE8904477U1 (en) 1988-10-08 1989-11-16 Ludwig Krieger Draht- Und Kunststofferzeugnisse Gmbh, 7500 Karlsruhe, De
US5028474A (en) 1989-07-25 1991-07-02 Czaplicki Ronald M Cellular core structure providing gridlike bearing surfaces on opposing parallel planes of the formed core
US5139154A (en) 1989-12-27 1992-08-18 Beloit Corporation Wear screen plate and method of manufacture thereof
DE4002078C1 (en) 1990-01-25 1991-05-02 Fa. Carl Freudenberg, 6940 Weinheim, De
US5162143A (en) 1990-03-30 1992-11-10 The United States Of America As Represented By The Administrator, National Aeronautics And Space Administration Core design for use with precision composite reflectors
US5221008A (en) * 1990-05-11 1993-06-22 Derrick Manufacturing Corporation Vibratory screening machine and non-clogging wear-reducing screen assembly therefor
US5211291A (en) 1991-11-07 1993-05-18 Derrick Manufacturing Corporation Vibratory separator plate for flake-like members
US5256292A (en) 1992-04-16 1993-10-26 Cagle William S Screen for filtering undesirable particles from a liquid
US5312508A (en) 1992-10-16 1994-05-17 John Chisholm Attaching crimped wire mesh to an object requiring heat transfer
US5330057A (en) 1993-01-08 1994-07-19 Derrick Manufacturing Corporation Screen and screen cloth for vibratory machine and method of manufacture thereof
US5958236A (en) 1993-01-13 1999-09-28 Derrick Manufacturing Corporation Undulating screen for vibratory screening machine and method of fabrication thereof
EP0680385B1 (en) 1993-01-13 1999-09-15 Derrick Manufacturing Corporation Undulating screen for vibratory screening machine and method of fabrication thereof
US5417858A (en) 1993-01-13 1995-05-23 Derrick Manufacturing Corporation Screen assembly for vibrating screening machine
US5385669A (en) 1993-04-30 1995-01-31 Environmental Procedures, Inc. Mining screen device and grid structure therefor
US5490598A (en) 1994-03-30 1996-02-13 Drexel Oilfield Services, Inc. Screen for vibrating separator
US5392925A (en) 1993-08-12 1995-02-28 Environmental Procedures, Inc. Shale shaker and screen
US6401934B1 (en) * 1993-04-30 2002-06-11 Tuboscope I/P, Inc. Ramped screen & vibratory separator system
GB9309521D0 (en) 1993-05-08 1993-06-23 United Wire Ltd Improved method
USH1481H (en) 1993-06-23 1995-09-05 The United States Of America As Represented By The Secretary Of The Navy Offset corrugated sandwich construction
GB9404071D0 (en) 1994-03-03 1994-04-20 United Wire Ltd Improved sifting screen
US6029824A (en) * 1994-03-30 2000-02-29 Tuboscope I/P, Inc. Screen for vibrating separator
US5614094A (en) 1994-05-13 1997-03-25 Deister Machine Co., Inc. Vibrating screen unit
US5673797A (en) * 1995-03-29 1997-10-07 Derrick Manufacturing Corporation Screen assembly for vibratory screening machine and method of fabrication thereof
US5636749A (en) 1995-05-18 1997-06-10 Derrick Manufacturing Corporation Undulating screen for vibratory screening machine
US5819952A (en) 1995-08-29 1998-10-13 United Wire Limited Sifting screen
US5851393A (en) 1995-11-14 1998-12-22 Emerson Electric Co. Screen assembly
US5814218A (en) 1996-01-16 1998-09-29 Cagle; William S. Distorted rectangular filter cloth screen for vibrating screening machine
US5690826A (en) 1996-05-10 1997-11-25 Cravello; William Myron Shaker screen assembly
US5921399A (en) 1996-06-07 1999-07-13 Derrick Corporation Gumbo separator
US5944197A (en) 1997-04-24 1999-08-31 Southwestern Wire Cloth, Inc. Rectangular opening woven screen mesh for filtering solid particles
US5967336A (en) 1997-09-02 1999-10-19 Southwestern Wire Cloth, Inc. Vibrating screen assembly with improved frame
US5927511A (en) 1998-06-29 1999-07-27 Southwestern Wire Cloth, Inc. Flat screen panel for crowned deck vibrating shaker
US5950841A (en) 1998-07-22 1999-09-14 Emerson Electric Co. Screen assembly for a vibratory separator

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NO20030644D0 (en) 2003-02-10
NO327472B1 (en) 2009-07-13
AU2001294053A1 (en) 2002-05-06
WO2002034358A2 (en) 2002-05-02
EP1333904A2 (en) 2003-08-13
CA2420732A1 (en) 2002-05-02
EP1333904B1 (en) 2006-03-15
WO2002034358A3 (en) 2002-10-24
NO20030644L (en) 2003-06-11
ATE320296T1 (en) 2006-04-15
US6629610B1 (en) 2003-10-07

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