CA2216973C - Wire mesh filter - Google Patents

Wire mesh filter Download PDF

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Publication number
CA2216973C
CA2216973C CA002216973A CA2216973A CA2216973C CA 2216973 C CA2216973 C CA 2216973C CA 002216973 A CA002216973 A CA 002216973A CA 2216973 A CA2216973 A CA 2216973A CA 2216973 C CA2216973 C CA 2216973C
Authority
CA
Canada
Prior art keywords
wire mesh
woven wire
mesh layer
jacket
openings
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
CA002216973A
Other languages
French (fr)
Other versions
CA2216973A1 (en
Inventor
Bennett M. Richard
Benn Arild Voll
Allen Dale Gabrysch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baker Hughes Holdings LLC
Original Assignee
Baker Hughes Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Baker Hughes Inc filed Critical Baker Hughes Inc
Publication of CA2216973A1 publication Critical patent/CA2216973A1/en
Application granted granted Critical
Publication of CA2216973C publication Critical patent/CA2216973C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B01D29/11—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 bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • 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
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
    • B01D29/906—Special treatment of the feed stream before contacting the filtering element, e.g. cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/10—Filter screens essentially made of metal
    • B01D39/12—Filter screens essentially made of metal of wire gauze; of knitted wire; of expanded metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2411—Filter cartridges
    • 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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02—Subsoil filtering
    • E21B43/08—Screens or liners
    • E21B43/084—Screens comprising woven materials, e.g. mesh or cloth
    • 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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02—Subsoil filtering
    • E21B43/08—Screens or liners
    • E21B43/088—Wire screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/04—Supports for the filtering elements
    • B01D2201/0407—Perforated supports on both sides of the filtering element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/31—Other construction details
    • B01D2201/313—Means for protecting the filter from the incoming fluid, e.g. shields
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/496—Multiperforated metal article making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/496—Multiperforated metal article making
    • Y10T29/49604—Filter

Abstract

A filter is provided which combines a woven wire mesh (14) over a supporting body. The supporting body is typically a metal perforated tube which provides fluid communication between the well bore and the production equipment string. The woven wire mesh (14) acts as a filter to prevent the influx of sand particles (30), provides openings oriented at various angles relative to its surface, so that some area is available for fluid entry even when particulate matter is lodged on the surface above an opening, provides interior channels that allow fluid to travel from one location on the mesh surface to another location over an opening into the supporting body, and does not provide "straight-through" openings, thus forcing the fluid to make multiple turns (28) to pass through the mesh, thereby dissipating the fluid's energy and increases the mesh's erosion resistance. When particulate matter accumulates on the mesh's surface, the resulting particle cake remains porous, heightening the filter's resistance to plugging.

Description

w0 96131271 pcTnJS9sio4oss WIRE MESH FILTER
FIELD OF THE INVENTION
The field of the invention is filtering fluids as they are drawn from an oil or gas well reservoir.
BACKCrROUND OF THE I1~VENTTON
Oil and gas operators often drill wells into unconsolidated sandstone reservoirs. To obtain high production rates from such reservoirs requires some means of filtering sand out of the fluid as it is drawn from the reservoir. Operators have used screens and gravel packing to accomplish this filtering procedure.
Screens may be used as filters by sizing the screen to block the flow of particles larger than a given size. Traditionally, a sieve analysis is performed on the formation sand prior to completion of the well and the formation sand particle size range is determined. A filter screen size is chosen which will block the largest fifty percent of the formation sand particle sizes.
However, using filters of this size has several problems. First, the available inflow area for these filters is typically only three to six percent of the total filter surface area, which greatly limits the maximum flow rate available from the well. Second, screens used in these filters are typically square or rectangular grids, so that when a particle plugs a grid opening, the inflow area of that opening is lost, further reducing the inflow rate.
This lack of y alternative flow paths results in a filter which plugs very quickly. Third, these filters are subject to high erosion rates because the fluid flow is effectively straight through the filter material.

One alternative sizing arrangement in these types of filters is to size the filter to block only the largest ten percent of the formation sand particle sizes. This sizing results in filter openings that are approximately twice as large as those which block the largest fifty percent of particle sizes. This sizing technique helps to alleviate the rapid plugging problems of the smaller openings, but also results in much higher erosion rates.
Gravel packing is accomplished by placing a screen or slotted liner in the wellbore production zone, then filling the annular area between the screen or slotted liner and the formation with a specially sized, highly permeable sand. The gravel pack sand is sized so that it will not flow into the production equipment string. It also blocks the flow of formation sand into the production equipment string. Although effective in reducing sand production, gravel packing can be time-consuming. It can also be difficult to accomplish in horizontal wells because of the plugging tendency of current filter screens.
It is a goal of this invention to provide an economical filter that has an open flow area of greater than thirty percent of its total surface area.
It is a further goal of this invention to provide a filter which is damage resistant and which has properties similar to API standards for tensile strength and collapse.
It is another goal of this invention to provide a filter with high erosion resistance in both flow and circulation conditions.
It is another goal of this invention to provide a filter which is highly resistive to plugging by sand or other particulate matter.
SLTIyIMARY OF TIC INVENTION
A filter is provided which combines a woven wire mesh over a supporting body.
The , supporting body is typically a metal perforated tube which provides fluid communication WO 96/31271 PCTlUS96104035 between the well bore and the production equipment string. The woven wire mesh accomplishes four major goals. First, it acts as a filter to prevent the influx of sand particles.
Second, it provides openings oriented at various angles relative to its surface, so that some area is available for fluid entry even when particulate matter is lodged on the surface above au opening. Third, the mesh provides interior channels that allow fluid to travel from onc:
location on the mesh surface to another location over an opening into the supporting body.
The second and third features increase the effective open surface area of the mesh to greater than thirty percent of its total surface, compared. with typical ranges of three to six percent foo prior art wire-wrap filters. Fourth, the mesh does not provide "straight-through" openings., thus forcing the fluid to make multiple turns to pass through the mesh. This characteristic;
dissipates the fluid's energy and increases the mesh's erosion resistance.
To further increase the erosion and collapse resistance of the mesh, a wire-wrap jacket may be positioned between the mesh and the supporting body. This jacket will support the;
mesh over the locations of the perforations in the supporting body, further increasing the;
damage resistance of the mesh by preventing weak points where there is no direct support and where the fluid flow is highest.
An outer basketweave jacket may also be provided to both protect the mesh during insertion into the wellbore and to force the fluid through additional turns, further dissipating the flow energy and increasing the erosion resistance of the filter.
BRIEF DESCRIPTION OF THE DRAWITtGS
' 25 Fig. 1 is a partially cutaway side view of one embodiment of the wire mesh filtration system.
Fig. 2A is one embodiment of the wire-wrap inner jacket.
i: ;.' WO 96/31271 " ' ~ - PCTlUS96104035 Fig. 2B is a cross-sectional view of the wire wrap inner jacket depicted in Fig. 2A.
Fig. 3A is a cross-sectional view of one embodiment of the woven wire mesh layer.
Fig. 3B is a top view of the embodiment of the woven wire mesh layer depicted in Fig.
3A.
Fig. 3C is aside view of the embodiment of thf; woven wire mesh layer depicted in Fig.
3A.
Fig. 4A is a cross-sectional view of a prior art square wire mesh cloth.
Fig. 4B is a top view of the prior art square wire mesh cloth depicted in Fig.
4A.
Fig: SA is one embodiment.of the outer protective jacket.
Fig. SB is a cross-sectional view of the etriibodimerit of the outer protectivg jacket depicted in Fig. SA.
Fig. 6 is a graphical showing a comparison o:F 74 micron/200 mesh square wire cloth to 80 micron/250 mesh twilled Dutch weave, using 300 ppm SAE coarse test dust;
Fig. 7 is a graphical representation of a cornp;~rison of 104 micron/150 mesh square wire cloth to 110 micron/200 mesh twilled Dutch weave, using 300 ppm SAE coarse test dust.
DETA>LED DESCRIP'ITON OF THE PREFERREE~ E,MBODnVJENT
Referring to Fig. 1, one embodiiment of the wire mesh filter is shown. The wire mesh filtration system comprises a supporting body 10, s~~ch as a typical perforated pipe, a wire-wrap inner jacket 12, a woven wire mesh layer l~i, and a protective jacket, such as bas-ketweave jacket 16. The wire-wrap inner jacket 12 i:orms a cylinder coaxial with and closely wound about the supporting body 10.
Referring to Fig. 2A-B, The wire-wrap inner jacket 12 is wound so that there are gaps I8 between the windings 20 through which fluid may flow., The size of the gaps 18 is essentially uniform. The wire-wrap inner jacket 12 is preferably made of round wire so that , the openings between the windings 20 have mouths 22 that are larger than the gaps 18.
\ 4 Referring again to Fig. 1, the woven wire mesh layer 14 is fitted over and in mechanical contact with the wire-wrap inner jacket 12. Referring to Figs. 3A-C, a twilled Dutch weave;
woven wire mesh, preferred for use as the woven wire mesh layer 14, is shown.
As shown ire Fag. 1, placing the woven wire mesh layer 14 over the wire-wrap inner jacket 12 allows the;
wire-wrap inner jacket 12 to support the woven wire mesh layer 14 in the areas over the;
perforation holes 11 in the supporting body 10, thereby improving the damage resistance oi"
the woven wire mesh layer 14 against erosion and collapse.
Referring again to Figs. 3A-C, fluid may flow from the outer surface 24 of the wovern wire mesh layer 14 to the inner surface 26 of the woven wire mesh layer 14 only by flowing;
in a path such as flow path 28 that is not perpendicular to the outer surface 24 or the inner surface 26. Therefore, the twilled Dutch weave is plug-resistant because a particle 30 which.
becomes lodged on the outer surface 24 will not prevent flow around the particle into flow path 28. This feature allows fine filtering of the fluid while retaining a large effective open area in the filter.
By contrast, a standard square mesh wire cloth is shown in Figs. 4A-B. The square mesh has openings 32 that will trap particles 34 positioned so that there will be no flow through a plugged opening. Once an opening in a square wire mesh is plugged in this fash-ion, the available total available filter area is reduced by the size of the plugged opening. As with any sized opening, particles smaller than the opening size ("fine particles") will normally pass through the mesh. However, in the case of a square mesh with a large particle blocking a mesh opening, the fine particles are unable to reach the opening and, as more of the mesh openings are blocked by large particles, the fine and large particles will build up on the surface of the mesh forming a "cake." The fine particles can fill the spaces in between the larger particles, so that the cake will have low porosity and flow will be blocked.
The alternate flow paths available to the twilled Dutch weave mesh help to abate this type of plugging, because even when large particles are lodged on the surface, fine particles can flow around the large particles and into the twilled Dutch weave mesh.
Thus, the cake may tend to be constructed primarily of large particles and will have high porosity, because the interstitial spaces between the large particles can remain open.
Referring again to Figs. 3 A-C, the twilled Dutch weave mesh additionally creates flow channels 36 that are essentially parallel to the inner surface 26. Thus, if part of the inner surface 26 is blocked, as, for example, by contact with one of the windings 20 in the wire-wrap inner jacket 12 of Figs. 2A-B, fluid may travel along the flow channels 36 to a position where the fluid can flow out of the inner surface 26. Therefore, it is preferred that the woven wire mesh layer 14 is oriented so that its flow channels 36 are not parallel to the windings 20 in the wire-wrap inner jacket 12, thus allowing the flow channels 36 to carry fluid from a point where flow is blocked to a point where the flow may reach one of the gaps 18 in the wire-wrap inner jacket 12. Because of its abilities to allow flow even with particles lodged on its surface and to provide flow channels within the mesh, the twilled Dutch weave mesh of the present invention allows the filter to have an effective open surface area of greater than thirty percent of its total surface area.
Referring again to Fig. 1, the basketweave jacket 16 is concentric with the supporting body 10, the wire-wrap.inner jacket 12, and the woven wire mesh layer 14. The basketweave jacket 16 provides a shield to protect the woven wire mesh layer 14 during insertion of the s ~ ~ CA 02216973 2005-03-07 WO 96131271 ' .- ~ PCTIUS96I04035 :,.. ..~ t :' ~.. :, filter downhole. Additionally, Referring to Figs. SA-B, the basketweave jacket 16 allows fluid to flow though openings 37 into the annulus 38 between the basketweave jacket 16 and the woven wire mesh layer 14 only by making at least one turn in the flow path 40.
Therefore, the basketweave jacket 16 helps to dissipate the flow energy, improving the erosion resistance of the filter. Redirecting the flow in thins manner may also allow fluid to sweep across the surface of the woven wire me;~h layer 14, thereby reducing the tendency of particle to become embedded on the outer surFtce 24 of the woven wire mesh layer 14 and possibly dislodging particle which have lodged there. As depicted in Fig. SA, the openings 37 in the basketweave jacket 16 are preferabl3~ aligned substantially along the longitudinal axis of the wire mesh filter, thereby reducing; the fkel~ood of dirt accumulation in the _ ...
'15 openings 37 doting insertion into the wellbore.
To show the improved performance of the twilled Dutch weave mesh over standard square wire mesh filters, tests were run in a I-iassler cell using 1.278 inch diameter filter samples. The tests used a flow rate of 500 mUmin of 300 ppm SAE Coarse Test Dust and were terminated when the inlet pressure reached 100 psi. Two such tests were run: (I) comparing 74 micron square mesh wire cloth to 80 micron twilled Dutch weave;
and (~
comparing 104 micron square mesh wire cloth to 11'0 micron twilled Dutch weave. Because the twilled Dutch weave does not provide an easily measurable square hole, the micron sizes of the twilled Dutch weave filters are approxi~r~ate ratings.
The test results are shown graphically in Figs. 6 and 7, corresponding respectively to tests I-II. In both tests, the twilled Dutch weave outperformed the square mesh, not only resisting pressure increases (plugging) for l~~nger periods, but showing a slower rate of ~I I I

.e wp 96/31271 ~ ~ PCT/U596l04035 pressure increase once plugging began, demonstrating the higher porosity of the cake on the twilled Dutch weave surface. Additionally, the pressure increase curare for the twilled Dutch weave exhibits jagged "steps," exhibiting behavior consistent with fine particles being forced '. , through and flushed out of the interstitial spaces between Iarge particles in the accumulating '' cake by the building pressure. This effect is more pronounced for the larger mesh (Fig. 7) than for the smaller mesh (Fig. 6), a result which is consistent with the larger mesh's ability to pass larger "fine" particles and thereby breal~; bigger "logjams" of particles. These tests demonstrate the superior quality of the twilled Dutch weave in these mesh sizes for filter applications of this type.
lVfany-modifications and variations may be: made in the embodiment~ described herein and depicted in the accompanying drawings without departing from the concept of the present invention. Accordingly, it is understood that the embodiments described and illustrated herein are illustrative only and are not intended as a Iimitatiori upon the scope of this invention.
s

Claims (19)

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. A downhole filter apparatus, comprising:
a supporting body;
a woven wire mesh layer mounted to said body;
a jacket mounted over said woven wire mesh layer, said jacket comprising a plurality of defined flowpaths beginning from openings defined in an outer face, said defined paths configured so that a substantial portion of the fluid flowing therethrough between said outer face and an inner face on said jacket makes at least one turn of at least approximately 45° before passing through openings on said inner face and contacting said woven wire mesh layer, each flowpath extending from said opening in said outer face and further comprises a plurality of structurally discrete paths extending from said opening in said outer face to a plurality of said openings in said inner face, whereupon said jacket dissipates energy of the fluid flowing therethrough to reduce erosion of said woven wire mesh layer.
2. The apparatus of claim 1, wherein:
said jacket has no protrusions on said outer face thereof to allow said jacket to facilitate placement of said filter apparatus downhole.
3. A combined filter assembly and covering, said covering comprising:
a structure further comprising an inside and an outside face and defined flowpaths therein, said flowpaths having ends defined by an inlet opening on said outside face and an outlet opening on said inside face, each flowpath extending from said opening in said outside face and further comprises a plurality of structurally discrete paths extending from said opening in said outside face to a plurality of said openings in said inside face, said defined flowpaths reducing fluid velocity and, by virtue of the shape of said flowpaths, reorienting the direction of substantially all the flow through said inlet openings for the purpose of reducing erosion effects on said filter assembly.
4. The combination of claim 3, wherein:
said defined flowpaths extend from an inlet to a plurality of outlets.
5. The combination of claim 3, wherein:
said covering has no protrusions on said outer face thereof.
6. The combination of claim 3, further comprising:
said defined flowpath force the fluid in each of them to make one turn before contacting said filter assembly.
7. A combined filter assembly and covering, said covering allowing fluid to pass therethrough without any significant filtration for the purpose of protecting the filter assembly from erosion, said covering comprises:
a structure further comprising an exterior portion defining a plurality of inlet openings thereon and an interior portion which has a plurality of projections and a plurality of outlet openings such that defined flowpaths are formed between said inlet and outlet openings which turn the fluid flowing therethrough at least once;

each flowpath extending from said opening in said exterior portion and further comprises a plurality of structurally discrete paths extending from said opening in said exterior portion to a plurality of said openings in said interior portion.
8. A downhole filter apparatus, comprising:
a supporting body;
a woven wire mesh layer mounted to said body;
a jacket mounted over said woven wire mesh layer, said jacket comprising a plurality of defined flowpaths extending between openings on an outside face and openings on an inside face, each flowpath extending from said opening in said outside face and further comprises a plurality of structurally discrete paths extending from said opening in said outside face to a plurality of said openings in said inside face, said defined flowpaths configured so that all the fluid flowing toward said woven wire mesh layer makes at least one turn before contacting said woven wire mesh layer, whereupon said jacket dissipates energy of the fluid flowing therethrough to reduce erosion of said woven wire mesh layer;
said jacket has no protrusions on said outer face thereof.
9. A downhole filter apparatus, comprising:
a supporting body;
a woven wire mesh layer mounted to said body;
a jacket mounted over said woven wire mesh layer, said jacket comprising a plurality of defined flowpaths an outer and an inner face and openings thereon, each flowpath extending from said opening in said outer face and further comprises a plurality of structurally discrete paths extending from said opening in said outer face to a plurality of said openings in said inner face, each defined flowpath making at least one turn before exiting said jacket near said woven wire mesh layer, whereupon said jacket dissipates energy of the fluid flowing therethrough to reduce erosion of said woven wire mesh layer.
10. The filter apparatus of claim 9, wherein:
said jacket has no protrusions on said outer face thereof.
11. A filter apparatus, comprising:
a perforated body;
a woven wire mesh layer mounted over said body; and a jacket having an inner an3 an outer face and openings thereon defining a plurality of flowpaths extending therebetween, each flowpath extending from said opening in said outer face and further comprises a plurality of structurally discrete paths extending from said opening in said outer face to a plurality of said openings in said inner face, whereupon fluid passing through said jacket turns substantially 90° prior to exit through outlets for contact with said woven wire mesh layer.
12. A filter apparatus, comprising:
a perforated body;
a woven wire mesh layer mounted over said body; and a jacket structure mounted over said woven wire mesh layer and having an inner and outer face and openings thereon defining flowpaths, each flowpath extending from said opening in said outer face and further comprises a plurality of structurally discrete paths extending from said opening in said outer face to a plurality of said openings in said inner face, said flowpaths turn incoming fluid substantially 90° before contact with said woven wire mesh layer.
13. The apparatus of claim 12, further comprising:
a punch-in to create said substantially 90° turn.
14. A filter apparatus for downhole use, comprising:
a perforated body;
a woven wire mesh layer mounted over said body;
a covering for said woven wire mesh layer comprising inlets and outlets offset from said inlets on an inner and outer face and further comprising flowpaths, each flowpath extends from an opening in said outer face and further comprises a plurality of structurally discrete paths extending from said opening in said outer face to a plurality of openings in said inner face, to direct the flow therethrough.
15. A downhole filter apparatus, comprising:
a supporting body;
a woven wire mesh layer mounted to said body;
a jacket mounted over said woven wire mesh layer, said jacket comprising a plurality of defined flowpaths beginning from openings defined in an outer face, said defined paths configured so that a substantial portion of the fluid flowing there-through between said outer face and an inner face on said jacket makes at least one turn of at least approximately 45° before passing through openings on said inner face and contacting said woven wire mesh layer, whereupon said jacket dissipates energy of the fluid flowing therethrough to reduce erosion of said woven wire mesh layer; and said woven wire mesh layer comprising a weave of wires which define an inner and outer surface and a plurality of paths running between said surfaces and generally parallel thereto;
said weave configured so that openings that begin at said outer surface are offset from outlets on said inside surface.
16. A downhole filter apparatus, comprising:
a supporting body;
a woven wire mesh layer mounted on said supporting body;
said woven wire mesh layer comprising a weave of wires which define an inner and outer surface and a plurality of paths running between said surfaces and generally parallel thereto, with a first set of inclined passages extending from the paths to the inner surfaces, and with a second set of inclined passages extending from the path to the outer surface;
said weave configured so that openings that begin at said outer surface are offset from outlets on said inside surface;
a jacket over said woven wire mesh layer, having openings thereon;
said jacket comprises an inner surface and an outer surface, and wherein said openings provide at least one fluid pathway between said outer surface of said jacket and said woven wire mesh layer such that fluid flowing through said fluid pathway makes at least one change of flow direction as it passes therethrough.
17. A downhole filter apparatus, comprising:
a supporting body;
a woven wire mesh layer mounted to said body;

a jacket mounted over said woven wire mesh layer, said jacket comprising a plurality of defined flowpaths, each defined flowpath extending from an inlet opening and making at least one turn before exiting said jacket at on outlet opening near said woven wire mesh layer, whereupon said jacket dissipates energy of the fluid flowing therethrough to reduce erosion of said woven wire mesh layer;
said woven wire mesh layer comprising a weave of wires which define an inner and outer surface and a plurality of paths running between said surfaces and generally parallel thereto;
said weave configured so that openings that begin at said outer surface are offset from outlets on said inside surface .
18. A filter apparatus, comprising:
a supporting body;
a woven wire mesh layer mounted on said supporting body, said woven wire mesh layer further comprising an outer surface and an inner surface such that fluid can flow from said outer surface to said inner surface in a path which is not substantially perpendicular to said outer surface or said inner surface;
a jacket mounted on said woven wire mesh layer, said jacket further comprising a plurality of openings;
wherein said jacket comprises an inner surface and an outer surface, and wherein said openings define at least one fluid pathway between said outer surface of said jacket and said woven wire mesh layer such that fluid flowing through said fluid pathway makes at least one change of flow direction as it passes therethrough.
19. The filter apparatus of claim 17, further comprising:
a wire-wrap inner jacket mounted on said supporting body and placed between said supporting body and said woven wire mesh layer.
CA002216973A 1995-04-07 1996-03-25 Wire mesh filter Expired - Lifetime CA2216973C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/418,954 US5624560A (en) 1995-04-07 1995-04-07 Wire mesh filter including a protective jacket
US08/418,954 1995-04-07
PCT/US1996/004035 WO1996031271A1 (en) 1995-04-07 1996-03-25 Wire mesh filter

Publications (2)

Publication Number Publication Date
CA2216973A1 CA2216973A1 (en) 1996-10-10
CA2216973C true CA2216973C (en) 2006-01-24

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CA002216973A Expired - Lifetime CA2216973C (en) 1995-04-07 1996-03-25 Wire mesh filter

Country Status (7)

Country Link
US (3) US5624560A (en)
AU (1) AU721349B2 (en)
BR (1) BR9604795A (en)
CA (1) CA2216973C (en)
GB (2) GB2314282B (en)
NO (1) NO328880B1 (en)
WO (1) WO1996031271A1 (en)

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Publication number Priority date Publication date Assignee Title
US5624560A (en) * 1995-04-07 1997-04-29 Baker Hughes Incorporated Wire mesh filter including a protective jacket
US6006829A (en) * 1996-06-12 1999-12-28 Oiltools International B.V. Filter for subterranean use
US5782299A (en) * 1996-08-08 1998-07-21 Purolator Products Company Particle control screen assembly for a perforated pipe used in a well, a sand filter system and methods of making the same
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US5980745A (en) 1999-11-09
NO974620D0 (en) 1997-10-06
GB2314282B (en) 1999-12-01
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BR9604795A (en) 1998-07-07
WO1996031271A1 (en) 1996-10-10
US5849188A (en) 1998-12-15
GB2314282A (en) 1997-12-24
NO328880B1 (en) 2010-06-07
NO974620L (en) 1997-10-07
GB9902668D0 (en) 1999-03-31
CA2216973A1 (en) 1996-10-10
US5624560A (en) 1997-04-29
GB9721279D0 (en) 1997-12-10

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