US2072403A - Valve gear for a liquid pump operating motor - Google Patents

Description

.March 2, 1937. A, LAUSEN 2,072,403

VALVE GEAR FOR A LIQUID PUMP OPERATINGI MOTOR March 2, 1937.

VALVE GEAR FOR A LIQUID PUMP OPRATING MOTOR Filed Aug. 8, 1935 c. A. LAusEN 2,072,403

2 Sheets-Sheet 2 EL uw u Y www Patented Mar. 2, 1937 UlTED STATES VALVE GEAR FOR A LIQUID PUMP OPERAT- ING MOTOR Y Christian A. Lausen, Fort Worth,v Tex.Y Application August 8, 1935, Serial No. 35,370"

4 Claims.

The invention relates to well pumping devices particularly to a device for deep well pumping wherein the columnar weight of the liquid in the well casing is too heavy for ordinary pumping 5 purposes and the columnar weight is utilized for maintaining a balance of the liquid during the pumping operation.

A further object is to provide a piston and weight means in connection with a valve piston for alternately applying pressure in one direction and the other for varying the direction of movement of the pump piston within the well casing.

A further object is to provide the reversing valve piston with piston means connected thereto l5 and operated by pressure in the pipe line circuits on opposite sides of the reversing valve piston for alternately allowing pressure to be applied to the pipe line circuit on opposite sides thereof.

A further object is to provide a piston within a cylinder and having connection with the reciprocating valve piston for reversing the direction of pressure and allowing the application of pressure from a `source of pressure sup-ply to opposite sides of the pipe circuit to the well and weight means in connection with said mechanism for accelerating the action thereof.

A further object is to provide by-pass means from both sides of the pipe line circuit leading to the well and discharging into the valve control piston cylinder on opposite sides thereof, for allowing reciprocation of the piston within the cylinder as pressure is applied to one side orthe other of the pipe line circuit.

A further object is to provide cushioning cylinders-in connection with the by-pass pipes to take up the jar in the system incident to the velocity of the liquid.

A further object is to provide the reciprocating slide valve with a link connection with a pivoted T-shaped rockable member pivoted on the point of the Weight arm, which weight arm is adapted to move by gravity when forced by a yoke carried by the piston rod in the control cylinder. The weight, in its fallby gravity in opposite direction, moves an arm into engagement with lugs carried by the alined arms of the T-shaped member for accelerating the movement thereof and the reversing valve piston.

50 With the above and other objects in view the invention resides in the combination and arrangement of parts as hereinafter set forth, shown in the. drawings, described and claimed, it being understood that changes in the precise em- "55 bodiment of the invention may be made Within (Cl. IBI- 147) the scope of what is claimed without departing from the spirit of the invention.

In the drawings:

Figure l is a side elevation of the pumping and control device. 5

Figure 2 ist avvertical transverse sectional view through the well casing and parts therein.

Figure 3 is a side elevation of the pressure control mechanism, parts being shown in vertical longitudinal section to better illustrate the strucl0 ture.

Figure 4 is a top plan view of the pressure control mechanism, the valve casing being shown broken awayA to show the valve ports therein.

Figure 5 is a vertical transverse sectional view 15 through the reversing valve taken on line 5 5 of Figure 3.

This application is an improved valve controlling mechanism for liquid pumps as set forth in my Patent No. 2,018,215, dated October 22, 1935, 2o and the main pump operates in the same manner as set forth in said patent.

Referring to the drawings, the numeral I designates, the well casing, particularly of the type used in connection with deep wells, for instance 25 oil wells ofthe non-owing type and 2 a cap carried by the upper end of the casing, which is disposed above the ground level 3. Disposed within the well casing I in spaced relation to the inner periphery thereof is a stationary cylinder 30 ll which comprises upper and lower sections 5 and E. The cylinder t is elongated and may be of any length desired, depending upon the amount of liquid it is desired to lift on each reciprocation of the lifting piston' 1. 35

The cylinder sections 5 and 6 are connected together by a spacing member la, which engages the inner periphery of the casing I as clearly shown in Figure 2, and is provided with internally threaded flanges 8 in which the adjacent ends of the cylinder sections 5 and 6 are threaded.

Threaded at 9 on the upper end of the cylinder, section 5. is a reducing coupling I 0 in the reduced portion of which the discharge tube II is threaded, which discharge tube extendsl upwardly 45 through the packing I2 in the cap 2, and through the tube liquid discharged from the device is forced upwardly on the upward stroke of the piston l. Threaded on the lower end of the cylinder Il is a cap I3 in which is vertically movable a disc I4 forming a valve which cooperates with a valve y seat I5 and when unseated on the upward stroke of the piston 'I allows fluid to enter the lower end 0f the Cylinder 4 so that upon the downward 55 Cal in Figure 3.

stroke of the piston 1 said fluid will unseat the lower piston valve I6 and allow the trapped iluid to pass through the ports I1 into the hollow cylinder I in the chamber I8 where upon further upward strokes of the piston the trapped fluid will be forced back through the ports I1 and thence upward through the hollow piston 1 which is slidably mounted in the packing gland I9, unseating the upper valve 23 and allowing the trapped uid to be forced through the discharge ports 2l in the cap 22 carried by the upper end of the piston and into the chamber ofthe cylinder 4 above the piston where it can pass upwardly through the tube II. The piston 1, at its upper and lower ends, is provided with packing rings 23, preferably of the cup type for preventing escape of fluid around the piston. Connected to the upper end of the discharge tube is the discharge pipe 24, which is connected to the control piston casing 25 at 25, and connected to the casing 25 is a pipe 21, which discharges into the chamber 28 above the member 1, so that pressure may be intermittently supplied to the column of liquid in the casing chamber 28 for applying pressure to the under side of the upper piston 23 through the apertures 29 for forcing the piston intermittently upwardly for the intake operation and unseating the valve I4.

Pressure is intermittently applied to the upper end of the piston 1 through the pipe 24. Any kind of pump 30 may be used; however a conventional form of pump is shown and supplies pressure to the casing 25 through the pipe 3l, and this pressure is alternately supplied to pipes 24 and 21 for changing the liquid balance within the well structure. To acomplish this result a longitudinally movable control piston 32 is provided within the casing 25, and which control piston is provided with a V-shaped port 33 in the periphery of the piston which is adapted to cross connect the pressure supply port 34 with the ports 35 and 36 according to whether the piston is in one position or the other; it being shown in outer position in Figure 3, and at which time pressure is passing through the pipe 21 for forcing the piston 1 upwardly for the intaking operation, and when the piston is stopped in its upward movement by engagement of the upper side of the reducing coupling I0, the liquid balance in the device is overcome, thereby causing pressure to enter the chamber of the cylinder 31 through the pipe 38 and force the piston 39 in the direction of the arrow a. This action will cause outward movement of the piston valve as clearly shown When the balance is again changed as far as pressure is concerned pressure from the pipe 24 will pass to the chamber of the cylinder 31 through the by-pass pipe 40 and will force the piston 35i in the direction of the arrow b. This action will move the valve control piston in the opposite direction so that the V-shaped port 33 will cross connect pressure supply port 34 and port 35 for supplying pressure in the pipe 24. The above operation continues, and this last operation applies pressure to the upper side of the piston 1 through pipe 24 and tube II, thereby forcing the piston 1 downwardly for the reverse operation.

As the piston 1 moves downwardly during the above operation, disc I4 seats and the weighted valve I6 is unseated, therefore the trapped liquid passes through the ports I1 into the chamber IB around the piston 1, and when the piston reaches the end of its stroke there is a back pressure through the pipe 24 which causes an overbalancing of pressure in the system which will be applied to the piston 39 through the branch pipe 40, thereby causing a reverse operation. Branch pipes 33 and 43 are preferably provided with air cushioning cylinders 4I for taking up the shock incident to the velocity of flow of liquid in the system. It will be noted that the fluid forced upwardly alternately through the pipes 24 and 21 will be discharged transversely through the discharge port 42 in the casing 25 as the ports 43 in the control pistons are alternately placed in registration therewith and with the ports 35 and 33.

It is advantageous and desirable to obtain a quick reversing of the operation and movement of the valve control piston 32 and to accomplish this result the piston rod 44, carried by the piston 33, is provided with a rectangularly shaped yoke 45, which is slidably mounted on the base member 46 for bracing the same against down- L ward shock during the reversing operation. Pivcted on the base member 43 at 41 is a T-shaped bracket 43, to the inner side of which is pivoted on the pivotal point 41 a lever 49 which is provided with a weight 53. The arm 5I of the T-shaped lever 43 extends upwardly and has its alined arms 48a provided with inwardly extending lugs 52 which extend into the path of the lever 49 whereby the lever is raised by the yoke 45 through which the pin 53 extends, and which pin is carried by the plate 54 mounted on the lever 43 and moves therewith.

The upper end of the arm 5I of the T-shaped bracket 43 is provided with a link connection 55 with the slidable valve piston 32. In operation, when the piston 39 is moved in the direction of the arrow b, Figure 3, the yoke 45, through which the pin 53 extends, will force said pin and the weighted lever 49 towards a vertical position and towards the control valve 32. When the weighted lever 49 passes the vertical position the weight 55 will cause said lever to be accelerated in its movement, incident to gravity, and the lever will fall until it engages the pin 52 adjacent the valve 32 and will cause a quick and rapid shifting of the valve. In the meantime the pin 53 will engage the other side of the yoke and upon the reverse movement of the piston 39 in the direction of the arrow a, the operation will be reversed and the parts will assume the position shown in Figure 3. To absorb the shock of the movement of the lever 49 in the direction of arrow a, Figure 3 a bumper spring 56 is provided. Shock of movement in the opposite direction may be taken up by compression of air in cylinder 25 by piston 32.

From the above it will be seen that a quick acting reversing mechanism is provided for the control valve 32 and that the shifting of pressure from one side to the other of the pipe circuit is practically instantaneous.

The invention having been set forth what is claimed as new and useful is:

1. A control valve for regulating flow through two pipe lines, said control valve mechanism comprising a cylinder, a piston slidably mounted in said cylinder, pipe connections between the cylinder on opposite sides of the piston mounted therein and the pipe lines, a rockable member, a link connection between the rockable member and the control valve, a pivoted weighted lever adjacent the rockable member, stops carried by the rockable member and between which the weight lever has freedom of movement, a piston rod carried by the piston, a yoke carried by the piston rod, a lug carried by the weight lever and extending through the yoke, said yoke cooperating with said last named lug for shifting the weight lever to positions beyond a vertical Whereby the weight lever Will fall by gravity against the pins carried by the rockable member for accelerating the movement of the valve shifting.

2. A control valve mechanism for regulating ilow through two pipe lines, said control valve mechanism comprising a cylinder, a reciprocating piston within said cylinder, a connection between said piston and the control valve, by-pass connections between the pipe lines and opposite sides of the piston and cylinder, a weight lever, a yoke movable by the piston and controlling the movement of the weight lever for shifting the same beyond a vertical and allowing the same to fall by gravity, a pivoted member adjacent the Weight lever, stops carried by the pivoted member and between which the weight lever swings in its movement, said weight lever forming means for rapidly rocking the rockable member under the force of gravity and a connection between the rockable member and the control valve.

3. A control valve mechanism for regulating flow through two pipe lines, said control valve mechanism comprising a cylinder, a piston in said cylinder, means for shifting said piston, said means comprising by-pass connections to the pipe lines, a piston rod carried by the piston, a yoke, a base on which said yoke is slidably mounted, a T-shaped lever having the end of one of its arms pivoted to the base, a link connection between said last named arm and the control valve, spaced lugs carried by the other arms of the T-shaped member, a pivoted Weighted lever mounted on the base and having freedom of movement between the space lugs and a lug carried by the weight lever and extending through the yoke and having limited freedom of movement therein.

4. The combination with a control valve shiftable for regulating the flow through twoA pipe lines, of means for shifting said valve, said means comprising a cylinder, a reciprocating piston within said cylinder, a connection between the piston and the control valve, by-pass connections between the pipe lines and opposite sides of the piston in the cylinder, a piston rod carried by the piston, a pivotal member adjacent the end of the piston, a weight lever pivoted adjacent the pivoted member and movable between stops carried by the pivoted member, a yoke carried by the piston, a lug carried by the weight lever and extending through the yoke and having limited freedom of movement therein, and a connection between the pivotal member and the control valve.

CHRISTIAN A. LAUSEN.

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