US1697431A - Pump - Google Patents

Description

2 Sheets-Sheet 61H01 weg Jan. 1, 1929.

c. B. MARTIN l PUMP original Filedl oct. 2, 1925 Jan., 1, 929.

C. B. MARTIN PUMP Original Filed Oct. 2, 1923 2 Sheets-Sheet Patented Jan. l, 1929.

UTD

iras

P'UMP.

Application led October 2, 1923, Serial No. 666,115. RenewedMay- ,1, 1928.

This invention relates to improvements in pumps and more particularly to pumps used in forcing fluid from deep wells.

The primary object of the invention'is to furnish a double acting pump capable of forcing about 70% more liquid than a single acting pump of the same size.

Another object of tlie invention is to provide a pump of this character constructed to permit the withdrawal of all of the valves, piston and pump barrel with the sucker rod of the pump, so that repairs and replacements of parts may be facilitated.

A further object of the invention is to provide improved packing means for the various parts of the pump.

Another object of the invention is to provide a pump in which the various parts are detachable from one another, so that the parts may be readily assembled or dismantled.

VVit-h the foregoing objects outlined and with other objects in view which will appear as the description proceeds, the invention consists in the novel features hereinafter described. in detail, illustrated in the accompanying drawings and Vmore particularly pointed out in the appended claims.

Referring to the drawings:

Figure 1 is a vertical longitudinal sectional view of the pump in the position which it occupes in a well casing. Y

Fig. 2 is a similar enlarged view of the lower portion of the pump.

Fig. 3 is a transverse horizontal sectional view taken on line 3 8 of Fig. 2.

Fig. 4 is an enlarged vertical sectional view of the upper poi tion of the pump. p

Fig. 5 is a similar view of the intermediate portion of the pump.

Fig. 6 is a transverse sectional view taken on line 6 6 of Fig. 2; and n Fig. 7 is a similar view taken on line 7 7 of Fig. 4.

Referring to the drawings, 1 designates a tubular pump casing threaded at its lower end to a stand valve housing 2 and threaded at itsupper end to a guide cuff or sleeve 3. The housing 2 has a bore 4 having an enlarged conical surface 5 at its upper end and a. smaller conical surface 6 at its lower end. vDownwardly extending grooves or channels 7 are provided in the periphery of the housing and as shown in Fig. 3 these channels are equally spaced around the periphery. These channels eXt-end from the lower surface of the housing to ports 8 which communicate with the bore 4 near the up-per end of the housing.

rlhe housing also has upwardly extending peripheral channels 9 equally spaced around the housing as shown inF ig. 3 and extending from the upperend of the housing to ports 10` communicating with the bore 4.

Removably arranged in this housing 2, isv

a stand valve constructed in the following manner. A liner pipe 11 has an annular shoulder 1() and packing rings 15 surround the pipe and are pressed toward said shoulder by means ofl a nut 16 having a conical surface engaging` the conical surface 6, 'in order to aid in limiting the downward movement of the standy valve. .A valve seat 17 rests on the upper end of the pipe 11 and is held in place by an internal annular shoulder 18 integral with a tube 19 which is in thread` ed connection with the upper lend of the pipe 11. This tube is provided with ports 2O and encloses a ball valve 21, which at certain `times cooperates with the seat 17 to preventliquid from passing down the channels 9 andy through the tube 19 into the pipe 11, for a purpose hereinafter described.

Arranged above the tube 19 is aconduit 22 having a solid partition wall 23 which closes communication between the interior` of` the tube'19 and the interior of the conduit. The conduit has a number of ports 24 and at the place-where the ports occur, the conduit is surrounded by a slidab-le collar 25 having ports communicating with the ports 24 and with the bore 4. Packing rings 26 surround the lower portion of the conduit and rest on the upper end of the tube 19, which is inV threaded engagement with the conduit 22. Upper packing rings 27 surround the upper portion of the conduit and bear against the. collar 25 and against a shoulder 28 at, the upper portion of the conduit. It will be understood that when the tube 19 is tightened on the lower end of the conduit, the packing rings 26 and 27 andthe collar 25, will be forced toward the shoulder 28, for the purpose of packing the space between the bore 4 and said conduit. Y

The conduit has a threaded extension 29 at its upper end which supports a valve seat 80 held in place by a slotted valve cage 31, which houses a ball valve 32.

The upper en d of the conduit is in threaded engagement with the lower end of the pump 33. From Figs. 1 and 5, it may be seen that this pump barrel extends upwardly to form a chamber'34 in which the pump piston 35 recipnocates. The upper end `ofthe barrel is provided with ports 36 which places its chamber 34 in communication with a chamber 37 arranged between the barrel' and the casing 1. The barrel at its upper end is in..

pipe -38 or by tightening the skirt 39 onY said" pipe. These packing rings engage the coni` cal inner surface of the cuif 3, which latter is in threaded vengagementwith vthe upper end of the casingl asshown at 43. The upper end of this cuff is in threaded engagement at 44 witha casingA extension 45. The ends of the bore of the cuff are yila-fred lasshown at 46 and 47 for the purpose-of facilitating the passage of certain parts through this cuil", inl-a manner hereinafter explained.

The head 40 is, provided with ports 48 through which the flu-id pumped passes from the chamber 34 into the chamber 49 formed by the casingextension'45., A hollow piston rod. 50 extends through the head 40, and as best shown in-Fig. 5, its lower end is in threaded engagement at 51 with the head of the piston 35.v This piston includes a sleeve or tube provided with a 4number of metal rings 52 and cup ,packings 53,*all held in place bya nut '54at the lower end of the piston.

\ Referring to Fig.'4, it maybe seen that the hollow ipiston rod 50 also extends upwardly through a sliding valve 55. This valve-is adaptedV to close the ports 48 and to be opened 'by the` pressure eXer-ted on the liquid passing through Asaid ports 48. The valve itself consists of a tubular casing having athreaded head 56 and a threaded base 57, the latterr carrying a valve head 58, which seats on the upper surfaceof the headI 40 and closes the ports 48. Arranged above the base 57 is a stationary ring 58a having radial slots 59, only one of which is shown. In practice, preferablythree of these slots are equal-ly spaced around the periphery of the ring 58"L and they are provided to accommodate the heads 60 of screws 61, which pass through the base 57 and are threaded into the head 40 as shownat 62. `Each one of these screws is provided with `a spring 63, whichV bears against the head of the screw and against the base 57, for the purpose of forcing the latter toward the head 40 and to close theports 48. Arranged above the ring are packing `glands A63 and packing rings 64, which are forced toward the ring 58a by means of a spring 65 which bears against the upper packing gland 63 and against the threaded head 56.

The upper endof the pistonrod 50-is provided with a valve seat 66, which cooperates with the `ball valve 67 arranged infa slotted cage 68 having a threaded extension 69 adapted to be connected to thesucker rod of the pump.

In operation the sucker rod is reciprocated and this Jcauses the pistond rod 50 and the piston 35 to reciprocate in the pump casing. As

the piston rises and falls in the pump barrel 33, the liquidwillfbe drawnl in and forced out of the pump. Assuming 'that the piston 35 is moving downwardly, saidpiston will tend to create a vacuum in the upper portion of the chamber 34 above the pistonf35 and this' will cause liquid to pass upwardly through the pipe 11 past the valve 21, throughv the ports of the conduit 19,. andthen through. the

ports 10 into the channels 9 and upwardly.

into the tubing 70 of the pump, which will.

convey the same to the top of the well.

Vhenthe piston has reached the bottom ofl its downward stroke and starts on its upward stroke, pressure will be exerted on the liquid.

previously drawn into the chamber 34 .above the lpiston 35 and this pressure will extend into the tube 19 and seat the valve 21. Then.

as the piston moves upwardly the liquid in the chamber 34 above thepiston 35 will,

be forced upwardly through the ports 48 and will unseat the sliding valve V55, and

this liquid will pass into the chamber 49V and up the tubing 7 0 of the pump. As the piston rises, the valve 32 will beunseated and the valve 67 will be seated, so that liquid on the upward stroke of the-,piston will travell up the channels 7 through the ports 8 and 24 into the conduit 22 and fromfthis conduit, past the valve 32 and throughthe slots 31 into the lower portion of the chamber 34.

It will thus be seen that on each downward stroke of the piston liquid is drawn into the pump and on each upward stroke of the piston liquid is drawn into the pump. Also liquid is discharged from the pump on each downward and on each upward stroke ofthe piston.

Alt the same time liquidvr Should it be desired to withdraw the stand valve, piston, sliding valve, etc. from the. .i

pump, thesucker rod may be elevated and this will cause. the piston to rise until its upper end strikes the lower end of the short pipe38. Then this short pipe will rise with the piston and draw the packing 41 through the cuf 3. f

At the same time the short pipe 38 willv lift the barrel 33and as thelower end of -this barf rel is connected to the upper end ofthe conduit 22 of the stand valve, said stand valve will also be raised. The iiared surface 46-of the. cuil moved upwardly, while the flared surface 47 facilitates the introduction of the stand valve into the pump casing. Furthermore when the parts are introduced into the pump casing, the flared surface 47 functions to gradually compress the packing rings 41.

It will be understood that the pump is constructed mainly from tubing, ball valves and packing rings, and the various parts are detachably connected together. This construction simplifies manufacture, reduces cost and facilitates assembling orv dismantling. y

From the foregoing, it is believed that the construction, operation and advantages of the invention. will be readily understood without further description and it is apparent that changes may be made in the construction disclosed without departing from the spirit of the invention as expressed in the claims.

What is claimed and desired to be secured by Letters-Patent is y l. A double-acting deep well pump including a casing, a stand valve associated with said casing and provided with a plurality of valve members to control the passage of liquid into said casing, a barrel associated with said stand valve and adapted to receive liquid passing one of said valve members, said barrel being directly connected to said stand valve, a. hollow piston rod having a piston in said barrel, a valve for controlling the discharge of liquid from said hollow piston rod, a valve for controlling the passage of liquid from said barrel, and abutment means on said piston and barrel to permit the pistonto raise the barrel and stand valve while the piston rod is being withdrawn from the Well, the stand valve including a conduit having ports, a slidable collar surrounding said conduit and having ports communicating with the ports of the conduit, packing rings surrounding the conduit and bearing on said collar, and means for expanding said packing ring.

2. A double-acting deep well pump including a casing, a stand valve associated with said casing and provided with` a plurality of valve members to control the passage of liquid into said casing, a barrel associated with said stand valve and adapted to receive liquid passing one of said valve members, said barrel being directly connected to said stand valve, a hollow piston rod having a piston in said barrel, a valve for controlling the discharge of liquid from said hollow piston rod, a valve for controlling the passage of liquid from said barrel, abutment means on said piston and barrel to permit t-he piston to raise the barrel and stand valve while the piston rod is being withdrawn from the well, and a cuff provided in said pump casing and having upwardly and downwardly flared surfaces at its ends to facilitate the passage of the stand valve through the cufl' in either direction.

3. A double-acting deep well pump including a casing, a stand valve associated with said casing and provided with a plurality of valve members to control the passage of liquid into said casing, a barrel associated with said stand valve and adapted to receive liquid passing one of said valve members, said barrel being directly connected to said stand valve, a hollow piston rod having a piston in said barrel, a valve for controlling the discharge of liquid from said hollow piston rod, a valve for controlling the passage of liquid from said barrel, abutment means on said piston and barrel to permit the piston to raise the barrel and stand valve while the piston `rod is being withdrawn from the well, a cufl' provided in the casing and having upwardly and downwardly flared internal surfaces at its ends, and packing arranged at the upper end of said barrel and adapted to be squeezed by one of said flared surfaces.

4c. A double-acting deep well pump including a casing, a stand valve associated with said casing and provided with a plurality of valve members to control the passage of liquid intosaid casing, a barrel associated with said stand valve and adapted to receive liquid passing one of said valve members, said barrel being directly connected to said stand valve, a hollow piston rod having a piston in said barrel, a valve for controlling the discharge of liquid from said hollow piston rod, a valve for controlling the passage of liquid from said barrel, abutment means on said piston and barrel to permit the piston to raise the barrel and stand valve while the piston rod is being withdrawn from the well, a short pipe connected to the upper end of said barrel, a head connected to said short pipe and provided with ports, one of the before mentioned valves controlling said last mentioned ports, packing rings surrounding said short pipe, and a cuff connected to said casing and constructed to compress said packing rings.

5. A stand valve for double acting pumps including a tubular structure having an imperforate partition intermediate its ends, ball valves arranged on opposite sides of said partition, upper and lower spaced conical surfaces formed on the stand valve, and a housing having conical surfaces cooperating with the conical surfaces of the stand valve.

6. Astand valve for deep well pumps provided near its Lipper end with a conical surface and near its lower end with a conical suroriAnLns B. MARTIN.

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