US2630070A - Well pump - Google Patents

Description

March 3, 1953 L. DAVIS 2,630,070

WELL PUMP Original Filed May 13, 1949 2 SHEETS-SHEET l 7 Inventor J! Lam's Dar/s Attorney March 3, 1953 L. DAVIS 2,630,070-

WELL PUMP Original Filed May 13. 1949 2 SHEETS-SHEET 2 Inventor ZoullS Dav/'8 Patented Mar. 3, 1953 WELL PUMP Louis Davis, Corpus Christi, Tex., assignor of twenty-seven and one-half per cent to George W. Harris, Bay City, Tex.

Continuation of application Serial No. 92,989, May 13, 1949. This application August 3, 1950,

Serial No. 177,467

9 Claims. (01. 103-443) This application is a continuation of my prior application No. 92,989, now abandoned.

This invention relates to a novel construction of well pump, power for the operation of which is provided by the pressure in the bottom of a well.

More particularly, it is an aim of the present invention to provide a reciprocating type well pump wherein the pump structure is moved in one direction by the pressure in the bottom of a well or below the pump for loading, expansion spring means for forcing the pump structure to move in theopposite direction.

Another object of the invention is to provide a novel pump structure having a reciprocating valve means for permitting the medium being pumped from the bottom of a well or from beheath the pump to pass longitudinally through the pump in an upward direction.

A further object of the invention is to prouse a pump having a snap action for quickly reversing the position of the valve as the pump approaches the extremity of its movement and for causing the pump to quickly reverse its direction of travel.

Another object of the invention is to provide 'a pump capable of being applied to a pump tubing without killing the well and which is equally well adapted for use with wells having jet valves and to prevent the gas from by-passing "the cilor other liquid being raised and to thereby minimise the waste of gas from a well and to prevent the liquid from being blown out of the well by the gas pressure therein.

A further object of the invention is to provide a pump which will reduce the amount of gas required. for pumping any given quantity of oil or other liquid mediums from a well by preventing the gas from passing the liquid in its upward travel through the pump tubing.

Various other objects and advantages of the ing containing a well tubing in which the pump is detachably mounted;

Figure 2 is a fragmentary vertical sectional view on an enlarged scale taken substantially along "a plane as indicated by the line 2-2 of Figure 1';

Figure 3 is a similar view taken substantially along a plane as indicated by the line 3-3 of Figure 1;

Figure 4 is a cross sectional view taken substantially along a plane as indicated by the line 5-4 of Figure 3;

Figure 5 is an enlarged cross sectional view taken substantially along a plane as indicated by the line 5 5 of Figure 3, and

Figure 6 is a vertical sectional view taken substantially along a plane as indicated by the line ii-6 of Figure 3.

Referring more specifically to the drawings, for the purpose of illustrating a preferred application and use of the pump, designated generally l and comprising the invention, the numeral 3 designates a well casing having a perforated lower portion 9 which is submerged in the oil and sand ld'iorming a subsurface stratum. Disposed within the well casing 8 is a conventional well tubing ll having a lower perforated end 12 which is disposed in the perforated casing 5. The numeral l3 designates generally a conventional setting tool or anchoring device which is adapted to be lowered into the well tubing H and detachably anchored therein at any desired level by means of its expansible clamping element It. The anchoring device [3 includes a length of tube or pipe I 5 having packing members :5 of annular form which engage and seal the pump casing I 1 around the anchoring unit 43 to prevent liquid from the bottom of the well passing upwardly through the pump tubing it except by passing through the pipe or tube 15 from beneath the anchoring unit l3 to thereabove.

The pump 7, comprising the invention, includes an adaptor orcoupling I! having an internally threaded upper end 18 which engages the externally threaded lower end is of the pipe 15 for detachably connecting the pump 1 to the lower end of the anchoring unit l3 and so that said pump will be supported thereby in the lower portion of the Well tubing 1 I as illustrated in Figure 1. The coupling I! has a bore extending longitudinally therethrough as seen at 2|! which o ens outwardly of the lower end thereof and which communicates with the tube I5; said bore 2!} being restricted adiacent its low-er end to provide an upwardly facing valve seat 2| for an upwardly opening ball valve 22 which is normally urged downwardlv to a closed position by an expansion Valve spring 23 which bears on the upper part thereof and which seats against the lower end of the tube l5. The lower end of the coupling or adaptor i1 is restricted and externally threaded as seen at 25 to receive the internally threaded upper end 25 of a pump barrel 26 which extends downwardly therefrom to adjacent the lower perforated end 2 of the pump tubing 5 i.

The pump barrel 2% is provided with a screen 2i at its lower end which extends intothe perforated lower end l2 of the well tubing Ii and which has a disk 28 at its upper end which is externally threaded to detachably engage the internally threaded lower end 23 of the pump barrel 26 for detachably mounting the screen 2? thereon.

The disk 28 is provided with a threaded opening 353 in which is detachably mounted the threaded lower end of a conduit, designated generally 31 which extends upwardly therefrom through the pump barrel 26 to beneath and adjacent the adaptor ll. The conduit 3| has a solid intermediate portion 32 and tubular end portions forming a lower pipe or conduit 33 which opens into the screen 2! and an upper pipe or conduit 3d which opens into the pump barrel 26 beneath and adjacent the adaptor IT.

A piston 35 is reciprocally mounted on the upper pipe portion 34 and is reciprocally disposed in the pump barrel 26 and is provided with a plurality of piston rings 36 for engagement with the internal wall of the pump barrel 26 to prevent the medium being pumped from passing around the piston 35. An expansion coiled spring 37 bears against the underside of the adaptor i? and against the upper end of the piston 35 for urging said piston downwardly in gaged thereby for limiting the downward slidi ing movement of said collar and the sleeve valve 38 on the conduit member 3! and a similar stop collar Mi is adjustably secured to the tube portion 3 3, above the nut 39 by a setscrew 45 to limit the upward movement of the sleeve valve 38.

A sleeve 65 has an adaptor 4-! secured in the upper end thereof and which is provided with a bore 58 extending therethrough for reciprocally engaging the tube portion 34 and which is provided with a restricted externally threaded upper end 49 which threadedly engages a downwardly opening threaded recess 58 of the piston 35 for detachably connecting the sleeve 43 thereto. The sleeve MS is loosely disposed in the pump barrel 26 and loosely disposed around the upper portion of the conduit member 3| and has an annular springstop 5i threaded into its lower end to provide a seat for an upper expansion coiled spring 52 which is disposed on the conduit member 3! above the spring stop 5! and the upper end of which seats against the nut 39. The spring stop 5! also provides a seat for the upper end .of a lower expansion spring 53 which is likewise mounted on the conduit member 3| and the lower end of which seats against the collar dl.

The tube portion 33 is provided with externally disposed longitudinally spaced recesses including a lower recess 54 and an upper recess 55 connected by a groove 56. The collar M is 75 5-3 is compressed until the pressure thereof is r 4 provided with a radial bore 5'! containing at its inner end a ball latch 58 which is spring urged inwardly by an expansion coiled spring 53 which seats against the ball 58 and against a screw stop 69 which engages in the outer internally threaded end SI of the bore 51. The spring latch 53 is adapted to selectively engage the recesses 55 and 55 and to travel therebetween in the groove 56.

As best seen in Figure 6, the tube portion 33 adjacent the solid portion 32 is provided with a port 52 and the tube portion 34, adjacent the solid portion v32 is likewise provided with a port 63. The sleeve valve 38 has a lower port 34 which registers with the port 52 only when the spring latch 58 is in engagement with the lower recess 55 and an upper port 65 which registers with the port 63 only when the spring latch 58 is in engagement with the upper recess 55.

Assuming the parts are in the positions as illustrated in Figures 3 and 6, the pressure in the bottom of the well in which the pump 2 is disposed will cause the oil or other liquid being pumped to enter the well casing t ough the perforated portion 9 and to enter the lower end of the pump tube through its perforated portion $2. The oil will then enter the pump 3 through the screen 2? and pass upwardly through the tube portion, 33 and will be released through the registering ports 52 and 64 into the pump barrel 26. The oil can pass upwardly between the sleeve it and pump barrel 25 to impinge against the lower end of the piston and sufficient space is provided between the spring stop 5! and sleeve valve 38 to permit the oil to pass upwardly into the sleeve and impinge against its coupling or adaptor "41. When a suflicient amount of oil has thus entered the pump barrel 25 so asto exert sufficient pressure against the piston as to overcome the pressure of the spring 3? and spring 52, the spring latch 58 will be caznmed out engagement with the recess 5:; and the piston 35 will slide upwardly in the pump barr 25 carrying with it the sleeve 56, sleeve valve 253 and collar iii. This upward movement of the piston 35 and sleeve to will initially occur relatively to the sleeve valve 38, nut 39 and collar Ill during which time the spring 52 will be compressed and the spring 53 expanded until the pressure of the spring 52 is sufficient to unseat the spring latch 53 so that thereafter the sleeve vaive 33 will move rapidly to the upper extremity of its movement and in which the spring latch will seat in the upper recess 55, thereby moving the port 35,. out of registry with the port 52 the port 65 into registry with the port 63. When this occurs the oil within the pump barrel it will be released through the registering ports and and pass upwardly through the tube portion 3 to above the piston 35 and the oil which has passed to above the piston 35 on its previous upstroke will have been forced upwardly into the pipe i 5 by the pressure in the pump barrel chamber above the piston 35 and which causes the valve 22 to be unseated to permit the oil topass into the pipe i5. After suiiicient of this oil has escaped the then loaded spring 3'5 will force the piston 35 downwardly and the spring 23 will cause the valve 22 to resume a closed position to prevent the oil from escaping from the pipe it back into the pump barrel 26. As the piston moves downwardly the spring 52 is initially permitted to expand to assist in forcing Said piston and sleeve is downwardly and at the same time the spring suiiicient to unseat the ball latch 58.1rom the recess 55. When this occurs the collar All and sleeve valve 38 will move. rapidly downwardly until the ball latch Z58 seats'in the bottom recess 55 to thereby close the port 53 and reopen the port 62 so that the operation can be repeated. The ball latch 53 will engage the groove 56 in its movement between the recesses 55 and 55 to in sure its proper seating in said recesses and to pre vent the sleeve valve 39- irom turning relatively to the conduit member (it so that the ports fi l and will properly align with the ports 62 and 63, respectively.

From the preceding it will be readily apparent that a well pump of extremely simple construc tion has been provided which may be readily mounted in a well tubing and which will be reciprocally operated the pressure the bottom of the well for moving the reciprocating parts in one direction and for loading the spring to move the parts in the opposite direction. The pump "i may also be utilized with wells which are jetted by locating the pump above the jet valve and if desired a number of pumps may be employed, one above each of the jet valves of a well to prevent the gas from bypassing the oil, thereby eliminating the waste of gas. The pump l will also prevent oil from being blown out of a well and may be utilized in a well having a considerable bottom pressure.

Various other modifications and changes are contemplated and may obviously be resorted, without departing from the spirit or scope or" the invention as hereinafter defined by the appended claims.

I claim as my invention:

1. A reciprocating pump for pumping pressure fluid up the tubing of a well in which said tubing is installed, said pump being adapted to be lowered into a well tubing and detachably anchored adjacent the lower end thereof and comprising a pump barrel assembly adapted to be disposed in the well tubing in a submerged position and including a pump barrel and a conduit extending thereabove, means for sealing off the annular space between the well tubing the pump barrel assembly below the upper end of the conduit, an upwardly opening valve interposed. between said conduit the pump barrel, a piston reciprocally mounted in the pump barrel, spring means for urging the piston downwardly, a closure for the lower end of said pump barrel, a conduit member having one end secured in and extending through said closure and extending upwardly therefrom through a substantial portion of the pump barrel and reciprocally through said piston, said conduit member having a solid intermediate portion upper and lower tubular end portions, said lower tubular end portion opening through the closure and communicating with the well tubing to form the inlet passage of the pump, said upper tubular portion opening at its upper end above the piston and beneath said check valve, said tubular portions each being provided with a port, adjacent said solid intermediate portion, communicating with the pump barrel, a sleeve valve slidably mounted on said conduit member and having a port to register with the lower tubular portion only when the piston is at the lower extremity of its movement and a port to register with the port of said upper tubular portion only when the piston is at the upper extremity of its movement, and means forming a connection between the piston and sleeve valve whereby said sleeve valve will be reciprocated on said conduit member by the reciprocating movement of the piston, said piston being urged upwardly by the pressure of the oil within the pump barrel and beneath the piston.

2. A well pump as in claim 1, and adjustable stop means mounted on said conduit member for limiting the reciprocating movement of the sleeve valve.

3. A Well pump as in claim 1, and cushioning springs interposed between the means connecting the piston and sleeve valve for cushioning the movement of the piston and for causing the sleeve valve to rapidly move from a position to expose one of the ports of the conduit member to a position to expose the other port thereof.

a. A well pump as in claim 1, and cushioning springs interposed between the means connecting the piston and sleeve valve for cushioning the movement of the piston and for causing the sleeve valve to rapidly move from a position to expose one of the ports of the conduit member to a posi-- tion to expose the other port thereof, and spring latch means carried by the sleeve valve, said conduit member having spaced recesses to be engaged by said spring latch means at each ex tremity of the movement of the sleeve valve for releasably holding the sleeve valve in one or the other of the extremities of its movement and for cooperation with said cushioning spring for causing a rapid movement of the sleeve valve in each direction.

5. A well pump as in claim 1, said means for connecting the piston and sleeve valve including a sleeve member connected to and depending from the piston and disposed around a portion of the sleeve valve, 9. spring stop at the lower end of said sleeve member, expansion springs bearing against the upper and lower sides of the spring stop and disposed on the sleeve valve, and collar members at the remote ends of the sleeve valve forming seats for the remote ends of said last mentioned springs.

6. A well pump as in claim 1, said means .for connecting the piston and sleeve valve including a sleeve member connected to and depending from the piston and disposed around a portion of the s eeve valve, a spring stop at the lower end of said sleeve member, expansion springs bearing against the upper and lower sides of the spring stop and disposed on the sleeve valve, and collar members at the remote ends of the sleeve valve forming seats for the remote ends of said last mentioned springs, and spring latch means carried by the sleeve valve for releasably latching the sleeve valve at each extremity of its movement and for cooperation with said last mentioned springs to cause a rapid action of the sleeve valve as the piston approaches each extremity of its reciprocating movement.

7. A reciprocating pump for pumping pressure fluid up the tubing of a Well in which said tubing is installed, said pump being adapted to be detachably anchored in the lower end or said tubing and comprising, a barrel, means connected therearound for sealing off the annular space between said barrel and saidv tubing, said barrel opening into said tubing above said sealing means. said barrel having a bottom closure, a conduit member having one end secured in and extending through said closure and extending upwardly within said barrel, a piston operable within said barrel and around said conduit, 2. check valve in said barrel above said piston, resilient means .be tween said check valve and piston for urging said piston downwardly, a sleeve valve slida-bly mounted on said conduit member and having an i upper and lower port therethrough, Wall across said conduit, ports through said conduit above and below said wall, connection means between said. sleeve valve and said piston; to reciprocate said sleeve valve as said piston is urged upwardly by said pressure fluid and downwardly by said resilient means, and guide and stop means on said conduit and said sleeve valve to bring said upper and lower ports in engagement respectively at upper and lower stroke ends.

A reciprocating Well pump for a well having a tubing therein and a pressure fluid in communication with the lower end of the tubing, said pump comprising, a barrel adapted to be positioned in the lower end of said tubing, means around said barrel for sealing of? the annular space between said barrel and said tubing, said barrel opening into said tubing above said sealing means and having a bottom closure below said sealing means, a conduit communicating with said pressure sum below said bottom closure and upstanding Within said barrel above said bottom closure, a piston operable within said barrel and around said conduit, a check valve in the portion of said barrel above said conduit, means between said barrel portion and said piston to yieldably urge said piston downwardly, a valve memher in movable Contact with said conduit, said conduit and said valve member being adapted in lower position of said valve member to admit said pressure fluid from said conduit into said barrel below said piston to act upwardly thereon While closing off fluid pressure fiow out said conduit above said piston, said conduit and said valve member being also adapted. in upper position of said valve member to admit said pres sure fluid from said barrel to flow out said conduit above said piston while closing off fluid pressure flow from said conduit into said barrel below said piston, and means between said valve and said piston to alternately y'ieldably urge said valve downwardly to said lower position, and upwardly to said upper position.

9. A reciprocating pump for a well having a tubing therein and a pressure fluid in oozninunication with the lower end of the tubing, said pump comprising, a barrel having a conduit upstanding therewithin from the lower end thereof to communicate with said pressure fluid, means to seal between said barrel and said tubing, a piston operable to siidably seal between said barrel and said conduit, a check valve in said barrel above said piston, means in said barrel and around said conduit to yieldably urge said piston downwardly, a valve means around said conduit, said conduit and said valve means being adapted to permit relative motion therebetween between two predetermined positions to admit pressure fiuid to urge said. piston upwardly when one position and to discharge fluid from said conduit above piston in the other position wh n said piston is urged downwardly.

LOUIS DAVIS.

REFERENCES CITED The following references are of record in the of this patent:

UNITED STATES PATENTS Number Name Date 1,5QSA8S lodd June 23, 1925 1,5735% Smith Feb. 16, 1926 rosaszz Fletcher Jan. 16, 1934: znorssz Scott May 14, 1935 2,2123% Eddins Aug. 26, 1940 22%,5'7'7 Davis June 24, 1941 2,5981% Knox et a1. May 16, 1953

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