US2182062A - Pump - Google Patents

Description

Dec. 5, 1939. w SPROULL 2,182,062

PUMP

Filed July 9, 1934 5 Sheets-Sheet l Dec. 5, 1939.

c. w. sPRouLL 4 v '2,182,062

Filed July 9, 1954 5 Sheets-Sheet 2 Dec. 5, 1939. c, w. sPRoULL PUMP Filed July 9, 1934 3 Sheets-Sheet 3 Patented Dec. 5, 1939 UNITED STATES PATENT Aori-"ICE 4 Claims.

This invention relates to a pump.

An object of the invention is to provide in a deep well pump, a novel type of pilot valve for controlling the application of the operating iluid to the master valve which in turn controls the application of said uid to the pump plunger, and includes a novel connection between the pilot valve and pump piston.

Another object is to provide in a pump of this .10 character a novel type of master valve for controlling the applicationof the operating uid to said plunger.

A further object resides in a novel construction' and arrangement of conduits for conducting the operating iiuid as Well as novel means for securing said conduits to the pump cylinders.

The invention herein disclosed constitutes certain improvements in the -pilot valve and its connection to the pump piston, over that disclosed in my copending application for pump led in the United States Patent Office on April 3, 1934, under Serial No. 718,746, patented July 7, 1936, No. 2,046,588. E

With the above and other objects in view, this 1 invention has particular relation to certain novel features of construction, operation and arrangement of parts, an example of which is given in this specification and illustrated in the accompanying drawings,. wherein:

Figure l shows an elevational view, 4partly in -section of the upper portion of the pump shown positioned in the well casing of a well. l

Figure 2 shows an elevational view partly in section of the lower portion thereof.

Figure 3 shows a cross sectional view taken on the line 3 3 of Figure 5.

Figure 4' shows a cross sectional view, taken on the line 4 4 of Figure 6.

Figure 5 shows a vertical sectional view of the 1 1 upper end of the pump showing the master valve in position to permit the application of motive iluid toV the pump plunger to eiect the down stroke or power stroke of the plunger. l

Figure 6 shows a sectional view of the inters. mediate portion of the pump showing the pilot valve and the connecting means for connecting the same to the pump plunger.

Figure 7 shows a vertical sectional view showing the upper end of the working barrel and the displacement plunger associated therewith in its upper position, or in position to begin its power stroke, showing also the associated parts of the Dump Figure 8 shows a vertical sectional view of theV upper portion of the pump showing'the master.

(Cl. 10S-48) valve in the position it will occupy upon back stroke or upstroke of the plunger.

Figure 9 shows a vertical sectional view, showing the pilot valve in the position it will occupy upon the upstroke of the plunger, and 5 Figure l0 shows a vertical sectional view showing the upper end oi?l the Working barrel and the plunger associated therewith in position to begin a back stroke.

Referring now more particularly to the drawi0l ings wherein like numerals of reference designate similar parts in each of the figures, the numeral .I designates thepump body as a whole, whose Aupper end is connected to the tubular string 2 which extends to the ground surface and which l5 forms a conduit for the application of the operating uid such as water, or other liquid, to the Pump! Connected to the lower end of the pump body there is a tubular coupling 3 containing the stui- 20 ing box l, through which the hollow displacement plunger operates. Connectedto the lower end of the coupling 3` there is a tubular working barrel or cylinder 8 whose upper end is enlarged forming the head 1 which rests on the upper end 2,5 ofthe tubular packing cage 8. This cage contains the packing assembly 9 comprising cup rings and spacer rings forming a packing between the cylinder 6 and the cage 8 and said cage supports a surrounding packer III which forms a iluid tight seal between the cage and the well casing I I.

Beneath the packer cage 8 and attached thereto there is a liner I2, all or a portion of which lmay be formed into a screen such as I4, adapted to be set opposite the producing stratum in the 3, well.

The tubular, working barrel or cylinder 6 has a coupling I5 thereon provided with a seat to support the upwardly opening standing valve structure I6. Attached to and depending from y40 the coupling I5 there is a tubular gas anchor Il which may extend down the desired distance into the well.

The liquid displaced from the cylinder 6 passes out from the upper end of said cylinder through the back pressure valves I8, which are inclosed by suitable valve cages I9 which are screwed into the head 1. The pumped liquid passes into the space between the casing II and pump body I and passes thence up through said casing and out through the ow line 20. Y

It will be noted that the string 2 and the entire pumping apparatus may be withdrawn as a unit from the well leaving the packer I0 and the well .screen in the well and lmay be reinserted, also as a unit, into the well and seated on the packer cage.

The lower end of the housing is formed into a cylinder 2| whose lower end is connected to the upper end of the coupling 3 and this cylinder is provided with the inlet ports 22 which lead through said coupling. A piston 23 works within this cylinder 2 I, and is attached to the upper end of the displacement plunger 5.

The upper end of the pump body is formed with the master valve cylinder 24 and beneath it, the pilot valve cylinder 25, said cylinders being separated by the abutting plugs forming a partition 26. The upper end of the cylinder 24 is closed by the plug 21 and the lower end. of the cylinder 25 is closed by the stufiing box 28 through which the pilot valve stem 29 works.

As shown, the master valve comprises the pistons 3|), 3|, 32 and 33'which are fitted in the cylinder 24 and are spaced apart and which may be formed integrally with the piston rod 34. The ends of this rod project beyond the corresponding pistons 30, 33, forming the projections 35, 36 which maintain the end pistons of the valve 25 spaced from the opposing ends of the cylinder.

The pilot valve is elongated and comprises the piston rod 31 and the upper and lower pistons 38, 39 which are fitted into the cylinder 25 and are maintained in fixed spaced relation by said rod. The pilot valve asembly is xed to the upper end of the pilot valve stem 29.

The stem 29 is preferably formed of sections adjustably connected by the elongated coupling 40. The lower end of the valve stem 29 works through a central axial bearing 4I of the piston 23 and has the head 42 on the lower end thereof. Shock absorbing springs 43, 44, are provided, one interposed between the coupling 40 and the piston 23 and the other between the head 42 and 40 the piston 23.

Assuming that the displacement plunger has just completed its upstroke, the master valve will be in its upper position as shown in Figure 5, and the operating fluid such as oil or water under pressure will pass downwardly through the conduits 46, 46, and through the inlet ports 41, 41 into the cylinder 24 between the pistons 3|, 32 and thence out through ports 48, 48 into the conduits 49, 49, and thence down through said con- 50 duits and through the ports 59, 50 into the cylinder 2| and will operate against the piston 23 to drive said piston and the displacement plunger 5 downwardly displacing the liquid in the working barrel 6, said displaced liquid passing out through the back pressure valves I8 into the casing II outside of the pump body. As the piston 23 moves downwardly the fluid beneath it in the cylinder 2| will be forced out through the ports 22 and up through the conduits 5I, 5| through the ports 52, 52 into the cylinder 24 and thence out through the exhaust ports 53 into the iiuid being pumped.

As the piston 23 moves downwardly it will engage the spring 44 and move the pilot valve stem and valve downwardly with it. There is a conduit 54 which leads downwardly from the inlet port 41 and enters' the cylinder 25 through the port 55 between the pistons 38, 39 and the lower end of the cylinder 24 has a port 56 leading from the upper end of the cylinder 24 and spaced above the lower end of the cylinder 25 respec- While the operating fluid is being applied to the piston 23, the pressure of said fluid between the pilot pistons 38, 39 and beneath the master valve piston 33, will be equalized, said pressure passing in through the conduits 54, 51. The pressure of the fluid column in the casing above the pilot piston 38 and between the master pistons 30, 3| will also be equalized through the outlets 62, 64, and the pressure of the fluid above the master piston 30 and beneath the pilot piston 39 will be equalized through the conduit 51.

As the pilot valve moves downwardly, the piston 38 thereof. will move past the outlet port 58 simultaneously with the movement of the pilot piston 39 past the port 6I and operating fluid under pressure will then pass through the conduit 54 into the cylinder 25 and thence through the conduit 59 to the upper end of the cylinder 24 above the piston 36 thereof and the master valve will be forced downwardly into the position shown in Figure 8. The port 6I however of the cylinder 25 is located some distance above the lower end of said cylinder so that the pilot valve and the piston 23 will not be suddenly stopped, but may continue their downward movement until the master valve shall have reversed its movement, the piston 39 trapping the water beneath it in the cylinder 25 thus forming a shock absorber and preventing the sudden stoppage of said pistons, the pilot valve being thereby given suicient lead for that purpose. The trapped liquid may gradually pass out into the pumped liquid through the port 25. When the master valve has been forced downwardly as explained, the operating uid will pass through the conduits 46 and ports 41 into the cylinder 24 and thence out through the ports 52, the conduits 5I and the ports 22 into the cylinder 2| beneath the piston 23 and said piston and the displacement plunger 5 will be elevated and an additional charge of the pumped uid will be drawn into' the working barrel 6 through the standing valve I6. Upon elevation of the piston 23, it eventually will strike the coil spring 43, which, acting against the coupling 46, will elevate the stem 29 and the pilot valve, whereupon the pilot piston 38 will clear v'the portv58 and pass above'it and the pilot piston 39 will clear and pass above the port 6I and the operating uid under pressure will then pass from the conduit 54 through the cylinder 25 and the conduit 51 into the lower end of the cylinder -24 beneath the master valve piston 33 and the master valve will be elevated into its original position as shown in Figure 3.

The plug 21 and the partition 26 have the respective sockets 65, 66 to receive the extensions 35, 36 respectively so that liquid will betrapped in said sockets forming a shock absorber, said trapped liquid gradually being released through leak channels 61, provided in said extensions.

Upon elevation of the master valve the operating fluid will then pass through the conduits 46 into the cylinder 24 and thence through the ports 48 and conduits 49 and ports 50 into the 75 cylinder 2l to again force the piston 23 and plunger 5 downwardly as before, and before said piston 23 reaches the limit of its downward movement it will operate through the stem 29 as above explained to reverse the position of the pilot valve; and after the pilot valve has been reversed and the operating fluid has been admitted through the conduit 59 into the upper end of the cylinder 24, it has suiicient lead to continue its downward movement until the application of the operating fluid underneath the pistons 23 has been effected to cause a reversal of movement of said last'mentioned piston.

As will be noted the conduits for conducting the operating fluid are mounted externally of the pump body and are preferably formed of ordinary piping. The ends of the conduits 46, 49 and 5| are welded to suitable attaching plates which are substantially similar and which are designated on the drawings by the numeral 69 and these plates are bolted to the pump body by suitable bolts 1D. At the points of attachment of the plates to the body, said body is formed rectangular in cross sectional contour as shown in Figures 3 and 4 to provide fiat faces against which the plates are tted. The ends of these pipes are plugged up as shown and the plates are formed with central openings to register with the corresponding inlet and outlet openings. The joints between the attaching plates and the body are broken by the inside gaskets 1l. The other conduits 54, 51, 59 have their ends inwardly turned and tted into suitable sockets in the pump body aligned with the corresponding inlet or outlet openings. Accordingly these conduits may be readily attached and detached.

'I'he drawings and description disclose what is now considered to be a preferred form of the invention by way of illustration only while the broad principle of the invention will be defined by the appended claims.

What I claim is:

1. A deep well pump comprising a cylinder having a valve controlled inlet and a valve controlled outlet, said pump having a conduit for the discharge of the pumped liquid in communication with the outlet and also having a conduit for an operating fluid, a displacement plunger arranged to Work in the cylinder, a motor clyinder, a piston in the motor cylinder attached to the plunger, a stem slidable through the piston, said motor cylinder being connected with the operating fluid conduit on opposite sides vof the piston, upper and 55 lower valve cylinders in alignment, a master valve in the upper valve cylinder, for controlling the application of the operating iiuid to the piston to reciprocate the plunger, a pilot valve fixed to the stem and working in the lower valve cylinder, the longitudinal axes of the pump, motor, and valve cylinders being in vertical alignment one above another and the valves being movable along such axes, said lower valve cylinder being provided with an inlet for the operating fluid and spaced outlets for the operating fluid arranged to conduct said iiuid .to the master valve, said pilot valve including pistons in the lower valve cylinder movable to connect the outlets alternately with the inlet, whereby the application of the operating uid to the master valve to effect its reversal is con-4 trolled, said pilot valve cylinder having a relief port at each end. l yy 2. A deep well pump comprising a cylinder having a valve controlled inlet and a valvel controlled outlet, a displacement plunger arranged to reciprocate in the cylinder, a motor cylinder, a piston in'said motor cylinder connected to the plunger, a stem yieldingly connected to the piston, an upper master valve cylinder, a master valve in lsaid cylinder, a lower pilot valveI cylinder approximately coaxial with the master valve cylinder, a pilot valve in said lower cylinder fixed to the stem, the longitudinal axes of the pump, motor and valve cylinders being vertically aligned one above another and the valves being movable along such axes, said pump having a conduit for the discharge of the pumped liquid in communication with said outlet and also having a conduit for an operating fluid, external detachable pipes connected to the master valve and motor cylinders and having channels controlled by the master valve, through which the operating uid may be admitted from said conduit .to opposite sides of the piston alternately, and external detachable pipes havingv channels connected into said valve cylinders and controlled by the pilot valve through which an operating iluid may be admitted alternately into the master valve cylinder on opposite sides of the master valve.

3. A deep well pump comprising a cylinder having a valve controlled i let and an outlet, said pump havingy a conduit r the discharge of the pumped liquid in communication with the outlet and also having aconduit for an operating uid, a plunger arranged to work in the cylinder, a motor cylinder, a piston in the motor cylinder attached to the plunger, a stem slidable through the piston, said motor cylinder being connected with the operating fluid conduit on opposite sides of the piston, upper and lower valve cylinders in alignment, a master valve cylinder for controlling the application of the operating iluid toA the piston to reciprocate the plunger, a pilot valve xed to the stem and working in the lower valve cylf inder, the longitudinal axes of the pump, motor and valve cylinders being in substantial alignment one above another andthe valves being movable along such axes, said lower valve cylinder being provided with an inlet for the operating fluid and spaced outlets for the operating uid arranged to conduct said fluid to the master valve, said pilot valve including pistons in the lower valvecylinder movable to connect the outlets alternately .with the inlet, whereby the application of the operating fluid to the master valve to effect its reversal is controlled, said pilot valve cylinder having arelief port at each-end.

4. A deep wellv pumpI comprising a cylinder having a valve controlled inlet and an outlet, said pump having a conduit for the discharge of pump liquid in communication with the outlet and also having a conduit foran operating uid, a plunger arranged to work in said cylinder, a motor cylinder, a piston in the motor cylinder connected to the plunger, a stem having a slidable connection withv the piston, said motor cylinder being connected with the operating-huid conduit on opposite sides of the piston, upper and lower valve cylinders, a master valve in the upper valve cylinder and controlling the application of operating iiuid to the piston to reciprocate, and solely control the stroke of, the plunger, a pilot valve fixed to the stem and working in the lower yvalve cylinder, said pumpC having axconduit for operating uid leading from the upper valve cylinder and terminating in an inlet for the inlet of an operating fluid into the lower valve cylinder Yand said pump having conduits for operating rov fluid leading to the master valve cylinder and nl 5 pilot valve cylinder, said outlet conduits being arranged to conduct said operating fluid to the master valve, said pilot valve including pistons in the lower valve cylinder movable to connect the outlets thereof alternately with the inlet 10 thereof and said pilot valve pistons being so spaced apart as to maintain such connection during the further movement of the pilot valve in the same direction whereby the application of the operating fluid to the master valve to eiect its reversal is controlled, said lower, or pilot, valve cylinder being substantially longer than the pilot valve and said pilot valve cylinder outlets being spaced a sumcient distance from each other and from the pilot valve cylinder inlet so as to permit said further movement of the pilot valve While maintaining said connection, and the longitudinal axes of the pump, motor, and valve cylinders being in substantial alignment one above the other and the valves being movable along such axes.

CHARLES W. SPROULL.

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