US 1235112 A
Description (OCR text may contain errors)
0.1. COBERLL PUMP, I. APPLICATION FILED SEPT. 9. 19M.
Patented July 31, 1917.
H CLARENCE J. GOBERLY, OF LOS ANGELES, CALIFORNIA.
`Specification of Letters Patent.
Application led September 9, 1914. Serial No. 860,827.
To all lwhom t may concern.'
Be it known that I, CLARENCE J. COBERLY, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Pumps, of which the following is a specification.
This invention relates topumps for elevating water, oil and other fluids, and more particularly to pumps utilizing one or more pistons and pump rods for moving the column or columns of iiuid. Ordinarily, in the use of such pumps, the fluid is elevated or moved and discharged by a succession of impulses imparted to the fluid upon operation of the pistons. It results that the Huid issues or is discharged in a broken stream, and it further results that the smooth operation of the piston ory pistons and attendant features of the pump are disturbed by the intermittent movement and lag or backlash of the column of water.
It is the object of the present invention to provide a pump of the general character stated the operation of which is devoid of the pulsations ordinarily occurring as above pointed out, and by which fluid may be moved or elevated and discharged in a oonstant stream or stream of approximately constant or even volume, the operation of the pump being smooth and void of the backlash and jar .and disturbing stresses which ordinarily accompany the operation of this class ofpumps. In carrying out the invention, I provide, in communication with the stream or streams of fluid which is or are elevated by the piston or pistons, an air chamber within which a predetermined air pressure is maintained, greater than that of one atmosphere, the same being in communication with the ump line and preferably at or closely .adjacent to the working pump barrel, to the end that the fluid, upon each working stroke of the piston, may act upon or be acted upon by the compressed air of such chamber. A yielding relation is thus established in the column of liquid above or beyond the piston and this yielding relation or flexibility in this part of the pump line eliminates the jars and stresses and backlash ordinarily encountered in such and further produces a positive reaction maintaining even iow 'of the fluid and discharge therefrom by the pump both during working and return stroke of the `The invention has for 1ts object to provide ,patented July 31, 1917.l
improvements in pumps of the general naj ture above set forth, which will be superior in point of relative simplicity and inexpensiveness in construction andv organization, positiveness in operation, durability, freedom from liability to get out of repair, and facility in control, and which will be generally superior in efficiency and servicey ability.
With the above and other objects in view, the invention consists in the novel and useful provision, formation, construction, combination, association and relative arrangement of parts, members and features, all as hereinafter described, shown in the drawing, and finally pointed `yout in claims.
In the drawing: i
Figure Il is a central sectional elevation of a pump organized in accordance with the invention, the same being shown in place in a well hole and provided with the various.
features and adj uncts incident to its use and operation;
F ig. 2 is a taken on the lines 2-a22, Fig. 1, and looking in the direction of the accompanying arrows; and
Fig. 3 is a view similar to Fig. l of a modified form of construction. l,
Corresponding parts in all the figures are designated by the same reference characters.
Referring with particularity to the drawing, and to Figs. l and 2 thereof, A designates a pump barrel within which operates a piston B having a working Valve C, a foot valve I) being provided at the lower end of the pump barrel .and opposing the operation of the working valve. E designates a discharge pipe coupled onto the upper end of the pump barrel by a coupling e, two such lengths of discharge pipe being detail transverse sectional view,
shown, one above the other, the lowermost eter, coupled onto said lower pipe length E and the pump barrel A, at its lower end, by the same coupling e, and coupled onto the upper end of said lower pipe length E and on the lower end of said upper pipe length E by a common coupling k; A pump rod Z extends' upwardly through the pump and the length of discharge pipe, carrying the piston B at its lower end, and passes through a gland fm, provided in the crown or dummy-head n at the top of the discharge pipe. F designates means for operating the pump rod and piston, the same being shown as a shaft o and crank p which latter is joined by connecting rod g with the upper end of the pump rod. A lateral discharge opening r is provided in the dummy-head n. G designates means for supplying compressed air to the air chamber g, the same being illustrated in the drawing as comprising a pipe s leading to a compressed air receiver or reservoir t, which receives its supply of compressed air through a supply pipe o leading to a suitable compressor or pump (not shown). Within the receiver t may be contained a certain amount of water, oil or other fluid, to determine the normal supply or volume of air in such receiver and in the air chamber and line including such receiver and air chamber, or the normal working eiiiciency of the compressed air contained in such line. It is evident that thereceiver t may be dispensed with and a direct connection made between the air chamber g and the means for supplying compressed air thereto. The particular advantage in using the receiver --t is to provide a total compressed air line or system of greater capacity than would be possible 'if the entire system were installed within the well. The pump is shown as installed within the usual well casing H. 4 designates a drain valve at the lower end of the receiver t, and 5 designates a plug or cap at the upper end of such receiver, whereby liquid.
may be withdrawn from receiver.
In operation, the pump rod and piston are-reciprocated in the usual manner by the means F, and successive quantities of fluid are elevated by the piston and urged upwardly toward the "discharge opening- 7' and upper endof the discharge pipe. iUpon each such piston movement the vwater moved thereby is forced outwardly through the aports f and into the compressed air chamor added to such ber g, until the action of the compressed air counterbalances the elevating action of the piston, whereupon the water column will ascend through the discharge pipe and find `egress through the opening 1'. ,This yield in the water column, l"consisting of the escape of a portion thereof through the ports f, against the resilient cushion of compressed air, eliminates the backlash or back Referring to Fig. 3, A similarly designates the pump barrel of a pump installed in a well having the usual casing H, D designates the foot valve at the lower end of the pump barrel, B designates the working piston, C designates the working valve thereof and Z designates the pump rod. On
to the upper end of the pump barrel is coupled, as at e, the lower length of a string of discharge pipe E, and the pump rod Z plays within the discharge pipe and through a dummy-head or crown a having a lateral discharge opening b, and upon which rests a cylindrical casing c through which said pump rod also plays, glands or studing boxes -oZ and f being provided in the bottom of the casing c and in the top of the dummy-head a respectively, and a similar gland g being provided in the upper end of the casing'c, above which the pump rod is reciprocated by a connecting rod h which may be actuated similarly to the actuation of the connecting rod g shown in Fig. l. The pump rod Z is hollow or tubular and is provided with a lateral port or vent c which at all times communicates with the .interior of the cylindrical casing c, so that ffl, and which may be supplied by a suitable compressor or pump, or which 4may lead directly to such compressor or pump, in accordance with expediency or the particular service to be met with, The pump rod' Z isbroken or interrupted, within the discharge pipe line E, to include an air chamber fn, having a plurality of lateral ports o arranged in an annular series and whereby said'air chamber communicates with the dischargepipe line E. v
In the operation of the form of constructionshown in Fig. 3, the reciprocation of the pump rod and pistou causes the elevation of successive quantities of fluid which are urged upwardly to be discharged through the discharge opening Z) in the dummy-head.
As each such contribution to the water colcompressed air in such chamber, such resilient resistance, and yield of the water column subject to such resistance, taking off from the piston the back lash and jar and stress militating against smooth action and which would otherwise be present. Upon the downward stroke or return stroke of the piston, the fluid which has entered the compression chamber flows therefrom under the pressure of the compressed air in the chamber, and is added to the watercolumn above the piston, maintaining the otherwise diminished or interrupted movement of such colunm to and through the discharge opening b, and thus maintaining constant and even discharge or flow.
The air chamber g and receiver t .in effect, and in their working relation, constitute the separate units or subdivisions of a single chamber the function of one of which is to neutralize oscillations of pressure in the other; such units being connected by a surge pipe of material length within which such uctuations may be accommodated.
It is manifest that many variations may be made, with respect to the provision, formation, construction, combination and association of parts, members and features, all with respect to the similar aspects of the disclosure of the drawing and the foregoing description and statement, and without departing from a fair interpretation of the invention.
Having thus disclosed my invention, I
claim and desire to secure by Letters Patent:
1. An improved pump, comprising a pump barrel, means for elevating fluid therein, a discharge pipe through which the fluid 1s passed from the pump barrel, a pressure chamber communicating with the discharge pipe, and a further or cushion pressure chamber communicating with said firstnamed pressure chamber to tend to neutralize the oscillations of pressure therein. v
2. An improved pump,comprising a pump barrel, a piston for moving Huid therein, a working valve for the piston, a discharge pipe through which the fluid lpasses from the pump barrel, a pressure chamber communicating with the discharge pipe, and a further or cushion pressure chamber communicating with said first-named pressure chamber to tend to neutralize the oscillations of pressure therein.
3. An improved pump, comprising apump barrel, a piston for advancing fiuid through the pump barrel, a discharge pipe leading from the pump barrel, a pressure chamber communicating with the discharge pipe, and a further pressure chamber communicating with said first-named pressure chamber lto maintain constant the pressure therein; said piston being provided with a hollow pump rod interrupted between its ends, and said first-named pressure chamber being carried by the pump rod and installed in the interrupted portion thereof and being perforated to communicate with the discharge pipe.
4. An improved pump, comprising a pump barrel, a piston for advancing fluid through the pump barrel, a discharge pipe leading from the pump barrel, and an air chamber communicating with the discharge pipe and in which an air pressure in excess of one atmosphere is maintained; and compressed air supply means communicating with said air chamber; said compressed air supply means including a receiver adapted to contain a variable quantity of liquid and by which variance the compressed air capacity of such receiver may be varied.
5. An improved pump, comprising a pump barrel, a piston for advancing fluid through the pump barrel, a discharge pipe leading from the pump barrel, and an air chamber communicating with the discharge pipe and in which an air pressure in excess of one atmosphere is maintained; and compressed air supply means communicating with said air chamber; said piston being provided with a hollow pump rod interrupted between its ends, and said air chamber being carried by the pump rod and installed in the interrupted portion'thereof and being perforated to communicate with the discharge pipe', and a casing within which said pump rod plays, said pump rod being provided with a port within said casing, and said compressed air supply means communicating with said casing.
6. In an improved pump, a piston operatin in the pump discharge pipe w ereby fluid passes from the pump barrel, a compressed air chamber a pump barrel,
Vcommunicating with the discharge pipe, and
means for supplying compressed air to the compressed air chamber; said latter means including a receiver and means for varying the capacity of said receiver.
7 An improved pump,comprising apump barrel, a piston for advancing fluid through 'the pump barrel, a discharge pipe leading from the pump and an air chamber communicating with the discharge pipe and carried by and communicating with the hollow piston rod.
8. An improved pump, comprising a working chamber, means for moving fluid therein, a discharge pipe through which the uld is passed from the working chamber, and a pressure chamber communicating with the working chamber and subdivided into two intercommunicating units one of which directly communicates with the working chamber and the other of which tends to neutralize the oscillations of pressure therein.
9. An improved pump, comprising a working chamber, means for moving fluid therein, a discharge pipe through which thev fluid is passed from the working chamber, and a pressure chamber communicating with said barrel, a hollow piston rod,
working chamber; said pressure chamber comprising two units one of which directly communicates with the working chamber, and there being a pipe connection between said units whereby pressure surges may be accommodated as between said units and the tendency exerted to neutralize oscillations of pressure therein.
In testimony whereof, I have signed my CLARENCE J. COBERLY.
G. ROY PENDELL, ALFRED H. DAEHLEB.