US2038674A - Deep well pump - Google Patents

Description

J. PAUL DEEP WELL PUMP .April 28, 1936.

Fi1ed May 15, 1955 Illl III

1 m. N mw .n #A

. INVENTOR.

Patented Apr. 28, 1936 UNITED STATES DEEP WELL PULIP Julius Paul, Duluth, Minn., assignor of one-hall to Richard M. Sellwood, Duluth, Minn.

Application May 15, 1935, SerialNo. 21,595

19 Claims.

This invention relates to hydraulically onerated iluid pumps for use in raising water or oil or other uids from deep bored wells and oper- 'ated by fluid pressure from the surface.

The principal object of the'invention is to provide a double acting motor anl pumping cylinder for such a pump actuated by a rotatable valve.

Another object is to provide a novel form of rotatable valve for controlling the various ports for such a pump.

Still other objects and advantages of the invention will appear in the following description thereof.

Referring now to the accompanying drawing forming part of this application, and wherein like reference characters indicate like parts:

Figure 1 is a central vertical cross-sectional view of my improved deep well pump, partly in elevation.

Figures 2, 3, 4, 5, 6, 8 and 12, are, respectively, Aslightly enlarged cross sectional views on the lines 2 2, 3 3, 4 4, 5 5, 8 8, and I2-I2, of Figure 1.

Figure 7 is a top plan View of the motor piston.

Figure 9 is a perspective view of a iragmental portion of the, rotatable valve illustrating the cam formed thereon for rotating the valve.

' Figure 10 is a perspectiveview of the arcuately t shaped valve shoe. l

Figure l1 is a cross-sectional view on the line I I II of Figure 4, showing the finger I4, shoe 50, and cooperative parts in elevation.

My combined motor and pump structure is designed to be installed within the well casing, not shown, and is of a diameter to just conveniently flt therein without binding. Also within the casing are axially disposed a pair of pipes -the full length thereof ,-and the lower ends of which pipes are indicated at I and 2, the latter being installed within the former and through which the power iiuid is` forced for operating. the motor piston as hereinafter described and within the pipe I the exhaust power fluid together with lthe iluid pumped is forced to the top of the well. To the ,p 'rothe 1ower end'of this 'block 3 is bolted of.

otherwise Vremovably fixed the head block. 6, which is provided with an arcuately shaped opening 1 communicating with the opening 4 at its upper end. There is also provided another arcuately shaped opening 8, which communicates with but is much longer than the opening 5. In depth this opening 8 extends downwardly in the block 6 but about one-fourth its length, and from thence downwardly a pair of openings are formed, one communicating with each end of the bottom of the opening 8, the pair oi openings being indicated at 9 and I0, and they are inclined and converge downwardly into the single opening I I.

This head 6 is also provided with an axial bore into which extends the double-walled rotatable valve I2, the inner wall of which projects above the outer wall and to the upper end of the block 6, its extreme uppermost end being solid, and about which solid portion is keyed the sleeve I3 having a laterally extending finger I4 formed integral therewith and extending within the opening 8. It is to be understood that this double walled valve I3 is susceptible only of rotary motion for alternately opening and closing the valves which control the operation of the pump.

To the lower portion of the head block 6 is screw-threadedly attached as at I5 `the motor cylinder I6, and to the lower end of this motor cylinder is similarly screw-threadedly attached as at I'I the intermediate block I8, a moredetailed description of which -will be set forth later. Within the motor cylinder I6 is reciprocably mounted the hollow piston I9 which snugly ts within the cylinder I6 and also fits externally cated at 20, which extend downwardly through A' the intermediate block I8 and are attached to the pump piston 2I mounted within the pumping cylinder 22,-screw threadedly attached to the lower end of theintermediate block I8, and within which cylinder the pumping piston snugly fits as well as fitting about the rotatable valve I2, which latter also extends clear through the intermediate block I8, the pumping cylinder 22,

'and into and through the 'foot block 23, which It win be noted that thenouble walled rotatable valve I2 has two sets of ports therein, one for control of the motor operating mechanism and the other lfor the control of the pumping mechal nism, and that the innermost tubular' portion of the valve is divided into an upper and lower chamber 25 and 26 by virtue of the division wall 21.

The power receiving ports in the upper end of the rotatable valve I2 communicating with the v the rotation of the valve to supply .power intermittently to the top of the piston I9; 'while the -power receiving port at the lower end of the chamber 25 is illustrated at 3U which intermittently communicates with the port 3I in the intermediate block I8 for intermittently supplying power iluid to the under side of the piston I9; the port 29 communicating with the opening or passageway 32 in the block 6 for admitting the power fluid to the top of the piston. {,It will be noted that the ports 29 and 30 are forme'd through closed or thimble like portions of thle inner and outer walls of the valve I2 so that they do not communicate with the space intermediate of the two walls of the valve. The discharge port at the upper end of the outer wall of the valve I2 is shown at 33, it remaining at all times open and in communication with` the passageway 1 in the head block 6, and through which port and passageway all of the fluid pumped as well as the exhaust fluid from either side of the motor piston I9 passesv on its way to the surface of the well. To provide for the escape of the exhaust power iluid from either side of the motor piston I have shown the passageway 35 in the head block 6 which intermittently communicates with the port 34 in the near side of the outer wall of the valve, and the passageway 31 in the intermediate block I8 which intermittently communicates with the port 36 in the outer wall of the valve; the intermittent communication of these passageways and ports being accomplished of course by the rotation of the valve I2, and which also directs the power uid alternately above and below the piston for reciprocating the same.

Since this double walled valve I2 extends through the pump cylinder, and the pump piston 2I is rigidly connected to the motor cylinder, ports and passageways for the double action of said pump must be provided within the valve, the intermediate block I8, and the foot block 23 for the propenfunctioning of the pump. 'I'here is a solid wall or thimble-like construction 38 intermediate of the inner and outer walls of the valve I2 and within the `intermediate block I8 and through which the port 39 is formed, which intermittently communicates with vthe passageway 40 in the block I8 by rotation of the valve. Since the port 39 communicates with the inner chamber 26 of the valve, which chamber extends downwardly through the foot block and into the body of oil or other iluid to be pumped, when the piston 2| port 39, extending through the double walls of thei valve and to the inner chamber 26 thereof, so that when the pump piston is moving upwardly fluid will be sucked up the chamber 26, through the port 55 and passageway 43 into the cylinder 22 below the piston 2|. When the piston 2| has reached the upper end of its stroke and consequently has lled the cylinder 22 with oil below the piston and the latter is about to descend, the rotation of the valve will have opened communication between the passageway 44 in the foot block 23, and the port 56 into the space between the inner and outer walls of the valve, so that as the piston descends the fluid below it in the cylinder 22 will be forced through the passageway 44, port 56, into and up' through the space between the inner and outer Walls of the valve through the port 33 and on up to the surface of the well. Likewise when the piston 2| reaches the bottom of its stroke and is about to ascend, the rotation of the valve will have opened communication between the port 4I through the outer wall of the valve and the passageway 42 to the cylinder 22 above the piston, so that when the piston ascends the fluid thereabove will be forced out the passageway 42, port 4I into and up through the space between the inner and outer walls of the valve and through the port 33 Ato the surface of the well, and thereby providing for the double action of the pump.

The smaller tubular portion of the valve ex-y and 48in Figure 10, are integrally formed about the exterior of the outer wall of the valve I2, the

former engaging within a similarly shaped. cutaway cam-surface 41 within the interior of the piston I9 for the initial rotation of the valve in one direction; andthe latter (48) engaging within a similarly shaped cutaway cam-surface 49 in the pump piston 2| for the subsequent rotation of the valve in the other direction.

It is obvious that such a reciprocable pump and motor,l dependent upon -a central rotative valve common to both (which is deemed novel in the art) may be susceptible at times to inoperativeness due to its stopping on dead center. To provide against this possibility I have installed beneath the linger wing I4- of the throttle the freely slidable arcuately shaped shoe 50 having upwardly projecting end portions 5I alternately engageable by the wing so that when the valve is rotated in either direction it will, by engaging one or the other of the flanges 5I of said shoe, carry the latter with it to close either one or the other of the ports 9 or I0. It will be readily apparent that the cam mechanism previously described operable adjacent either end of the stroke of the pistons, will carry the wing I4 sufficiently beyond a central position to permit of the pressure of the power iluid in the port 8 acting against the wing to force it to the limit of its movement in that direction, and thus absolutely prevent any possibility of the motor or pump stopping on dead center.

The operation Assuming that. the device is properly connected to the pipes I and 2 and installed within a suitable casing within a Well from which oil is to be pumped andthe lower end of the rotary valve is Within saidbody of oil. Also, while I have illustrated in some of the views the motor and pump pistons as having made a partial stroke,

for convenience in description of the various parts, we will now assume that the pistons are at their uppermost position ready for a downward stroke. At this time the finger I4 would have been thrown clockwise (see Fig. 4) to the limit of its movement in that direction which would close communication to the motor piston through the port 9 and leave the port I Ii fully open. It will be understood thatthis specific arrangement of ports and wing finger I4 is solely for the purpose of preventing the motor from becoming stalled on dead center; otherwise` the power uid would be free to enter the motor uncontrolled.

With the various parts in their thus assumed positions, power fluid would enter down through the openings 5, I D, and I I, through the port 28 into the inner chamber 25 of the rotary valve, and downwardly to and through the port 29 and passageway 32 into the motor cylinder I6 above the piston I 9 forcing it downwardly and at the same time forcing downwardly the pump piston 2l. Now as the two pistons move downwardly exhaust from themotor piston will pass through the passageway 3l 'and port 36 vinto the space between the ldouble walls of the valve I2 and upwardly and out through the port into the passageway 1 and through the opening d into the space between the pipes I and 2 and on up to the top of the well. Simultaneously the pump piston 2| in its downward movement will force the oil beneath same through the passageway d and port 55 into the space intermediate of the two walls of the valve and force it upwardly, joining the exhaust from the motor and be discharged from the surface of the Well. Also as the pump piston goes down oilto be pumped will be sucked up through the inner chamber 26 through the port 39, passageway 40 and into the cylinder 22 above the piston.

Now as the motor piston I9 approaches the lower end of its stroke, its interior cut-out camlike portion 41 will engage the cam 46 on the peripheryof the valve I2 and cause the same to be rotated in an anti-clockwise direction until the nger wing I4 has closed communication through the port I0, it being noted that atsuch timethe shoe 50 has not yet been moved and still holds the port 9 closed. However the instant this happens the pressure of the power fluid against the inner side of the nger wing will continue its swinging motion carrying with it the shoe and thus instantly open the port 9 thereby permitting the fluid to continue entering the tubular chamber 25. But, at this time, due to the rotation of the valve the port 29 will have been closed and the port 30 opened causing the power uid to pass therethrough and through the passageway 3| forcing the piston I9 in the opposite direction; also the port 3B will have been closed and the'port 34 opened permitting the exhaust above the piston to escape up through the port 33, passages 'I and 4 to the well surface. At this same time the pump cylinder will be on its upward stroke and the port 56 will have been closed and the port l opened so that the oil above the piston will be forced through the passage 2, port 4I into the space between the-walls of the valve and join the exhaust from the motor piston in' their travel-to the surface of the Well. And then as the pump piston 2| approaches the upper limit of its stroke its internal cut-out cam-like portion 49 will engage the cam 68 on the periphery of the valve, reversing the rotation of the valve, closing and opening the various ports to cause the motor piston to be forced downwardly again.

Having thus described my invention, what I claim and desire to secure by Letters Patent, is:

1. In a double acting pump, two concentric longitudinally spaced cylinders, a rotatable valve axially disposed within said cylinders,va piston v within each cylinder connected together to operate in unison and reciprocable about said valve, means on said valve cooperative with means on one piston to operate the valve to control pressure fluid to opposite sides of one piston to reciprocate same, and means on said valve cooperative with the other piston to operate the valve to control the ilow of the liquid pumped.

2. In a double acting fluid pressure pump, a power fluid supply, two concentric longitudinally spaced cylinders, one of which is a power cylinder, a rotatable valve axially disposed within said cylinders, a piston within each cylinder and reciprocable about said valve, one of said pistons being a power piston, means for causing said pistons to move in unison, means for rotating the valve to control the intake and exhaust of the power fluid, to and from said power piston.

3. In a uid pump, a cylinder, a hollow rotatand a piston within each cylinder connected together to operate in unison and one of which is the power piston; said valve having openings therein registrable with openings in said cylinders communicating with the space above and below said pistons.

5. In a fluid pump, a cylinder, a hollow rotatable valve axially disposed within said cylin-A der, a cam-surface formed upon the periphery of said valve, a piston reciprocable about said valve and Within said cylinder, and a cam-surface Within said piston engageable with the cam-surface on the valve for rotating same to control' the flow of fluid pumped into and through sai valve to the top of the pump.

6. The combination with a double acting pump having aligned reciprocal motor and pump cylinders having pistons operable in unison therein, of a hollow rotatable Valve disposed axially within said pistons and upon which valve said pistons reciprocate, means alternately operable by the pistons for rotating the valve to control the flow of pressure fluid to the motor piston, and

the flowof the uid pumped during the opcration of the pump, and means operable by the valve to prevent the pump stopping on dead center.

7. The combination with a double acting pump.

exhaust of power iiuid to the motor piston, means for the inlet and discharge of pumped iiuid from the pump piston, means alternately operable by the pistons for rotating the valve to control power fluid to the motor piston, and simultaneously control the flow of fluid pumped during the operation of the pump, means operable by the valve to prevent the pump stopping on dead center, and a unitary power fluid connection to said motor.

8. A double acting fluid pump comprising a fluid power supply and exhaust means therefor, a casing, portions of which form motor and pump cylinders, a piston within each cylinder connected together to operate in unison, a rotatable valve extending within each piston, means upon the valve engageable by one piston for rotating the valve to cause the power fluid to be directed alternately to opposite sides of said motor piston, and means for rotating the valve to control tle flow of the fluid pumped.

9. A double acting fluid pump comprising a casing portions of which form motor and pump cylinders, a piston having an axial opening therethrough within each cylinder, said pistons being connected to operate in unison a rotatable valve axially disposed within said pistons and cylinders, a fluid power supply, exhaust means for said fluid power, and means upon the valve en- `gageable alternately by said pistons for directing and discharging the power fluid alternately to and from opposite sides of the motor piston and simultaneously opening and closing inlet and exhaust means for fluid pumped.

10. A double acting fluid pump comprising motor and pump cylinders, a piston having an axial opening therethrough within each cylinder and operablein unison, a rotatable valve axially disposed within said cylinders and pistons, a fluid power supply, inlet and exhaust ports for the power supply, inlet and discharge ports for the fluid pumped, and means whereby the reciprocation of the pistons operates the valve to control the power fluid alternately to and from opposite sides of the motor 'piston and simultaneously controls the inlet and discharge ports for the uid pumped.

11. A piston and valve structure for fluid motors, comprising a cylinder, fa hollow rotatable valve axially mounted within the cylinder inlet vand discharge ports communicable with the interior of said valve, a piston having an axial opening therethrough mounted and reciprocable upon said valve and within said cylinder, said piston and valve having cooperative means to rotate the valve to control the intake and exhaust of a power fluid alternately to and from opposite sides of said piston to reciprocate same, and simultaneously control the pumped fluid to said inletand discharge ports.

12. In a fluid pump, a cylinder, a reciprocable piston having an axial opening therethrough within said cylinder, a hollow valve axially disposed within said cylinder extending through and rotatable within the opening in said piston, means for reciprocating the piston for pumping the fluid into and from the cylinder through said valve, and means for rotating the valve to control the ow of liquid pumped.

13. In a fluid pump, a cylinder having ports at its respective ends communicating with the interior of the hereinafter mentioned hollow valve, a pumping piston reciprocable within said cylinder for drawing fluid throughsaid ports into said cylinder alternately at opposite ends of said piston and simultaneously discharging liquid from said cylinder alternately'from opposite ends of said piston to the top of the pump, means for reciprocating the piston to pump the uid, and a and from hollow valve `within said cylinder operable by the movement of the piston to control the ports and thereby regulate the flow of the fluid pumped through said valve.

14. In a fluid pump, a cylinder, a piston having an opening therethrough reciprocable within said cylinder, a double walled valve extending through said opening and upon which said piston reciprocates, ports through both walls of the valve and communicable with said cylinder for drawing uid into the cylinder alternately at opposite ends of said piston, ports through the outer wall of the valve and communicable with said cylinder alternately at opposite ends of said piston for receiving liquid from said cylinder and conducting it between the walls of the valve to the top of the pump, means for reciprocating the piston to pump the uid, and means for operating the valve to control the ports to regulate the flow of the pumped fluid.

15. In a fluid pump, a cylinder, a hollow rotatable valve within said cylinder, a piston having an opening therethrough through which the valve extends and upon which valve the piston is reciprocable within the cylinder, intake and exhaust ports communicating alternately with said cylinder, means for reciprocating the piston to pump the fluid through said ports and valve into and from said cylinder, and cooperative means upon the valve and piston for rotating the valve to control the flow of the fluid pumped.

16. In a fluid motor, a cylinder, a hollow rotatable valve within the cylinder, a piston having an opening therethrough through which the valveY extends and upon which the piston is reciprocable within the cylinder, a fluid power supply, inlet and exhaust ports for the fluid power supply, and cooperative means associated with the piston and valve to rotate the valve to control the intake and exhaust of the power uid through said valve alternately to and from opposite sides of said piston to reciprocate same.

17. In a fluid motor, a cylinder, a rotatable valve within the cylinder, a piston having an opening therethrough through which the valve extends and upon which the piston is reciprocable within the cylinder, a fluid power supply, inlet and exhaust ports at opposite ends of the cylinder for the fluid power supply, cooperative means associated with the piston and valve to rotate the valve to control the intake and exhaust of the power fluid alternately to andfrom opposite sides of said piston to reciprocate same, and means operable by the valve to prevent the piston stopping on dead center.

18. A piston and valve structure for pumps,c comprising a reciprocable piston having an opening therethrough, a cam surface formed in the wall of said opening, a rotatable valve extending within said opening and upon which valve said piston is reciprocable, and a cam surface onthe periphery of said valve for cooperation with the cam surface withinsaid piston for rotating the valve when said cam surfaces cooperatively ,engage one another.

19. In combination, -a cylinder, apump piston reciprocable within the cylinder, a hollow valve for control of liquid therethrough to and from said cylinder, said valve controlling passageways for said liquid and being rotatably mounted within saidA piston, said piston being freely reciprocal upon said valve, and means whereby the valve 'is' .rotated at the terminationof the stroke ofv the

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