US2938466A - Pump - Google Patents

Description

J. B. KING May 31, 1960 PUMP Filed 001:. 6, 1958 dose 0A .5. ////7 7 INVENTOR. flAZWAQZ%m ATTORNEY United States Patent PUMP JosephB. King, 7745 Gulf Freeway, Houston, Tex.

Filed Oct. 6, 1958, Ser. No. 765,391

2 Claims. (Cl. 103-44) directing pressure against the fluid column in the tubing.

It is another object of the invention to provide apumping means to be mounted in a string of tubing that will raise a column of fluid from the bottom of the tubing, and that may be lowered into and removed from the string of tubing without the necessity of removing the tubing itself.

It is another object of the invention to provide a pumping means to be mounted in the bottom of a string of tubing having means for utilizing the weight of the fluid column in the string of tubing to actuate the pumping means to lift a volume of fluid from the well upon each cycle completion of the pumping means.

With the above and other objects in view, the invention has relation to certain novel features of construction, operation and arrangement of parts more particularly defined in the following specification, and illustrated in the accompanying drawings, wherein:

Figure 1A is an elevational view of the upper portion of a string of tubing having the pumping means installed therein, in cross section, and

Figure 1B is a continuation of the view shown in Figure 1A, in cross section, illustrating the lower end of a string of tubing in which the pumping mechanism is installed.

Referring now more particularly to the drawings, the numeral 1 designates a string of tubing in a well bore, or the like, having the discharge connections as 2 and having the internal shoulders 3 at the lower end thereof. A gasket as 4 rests on the shoulder 3, and the pump barrel 5 having the outwardly turned shoulders 6 rests on said gasket 4 and is suspended from the lower end of the string of tubing. Within the barrel 5 adjacent the upper end thereof, is an annular groove 7 designed to receive a fishing tool (not shown) for removal of the barrel 5. Also within the barrel 5 is the piston 8 having suitable seal rings 9 and having the tubular stem 10. The upper end of the stem 10 has a check valve 11, which may be of any suitable design, such as the ball and cage illustrated.

The tubular stem 10 is provided with a suitable valve 12 in the lower end thereof, which may also be of any design desired such as the ball and cage shown. Immediately adjacent and above said valve 12 are outlet ports as 13, 13 and immediately below said valve 12 are the inlet ports 14, 14. The lower end of the stem 10 is mounted in the piston 15 which has suitable sealing means as the rings 16 thereon. The stem 10 moves longitudinally in the barrel 5 and a plug 18 is mounted ice in the barrel 5 having an axial port through which the stem 10 moves. Suitable seal rings 19 are provided in the plug 18 and bear against the stem 10, and a bleeder line 20 is mounted in the plug 18 and an enlarged portion of the bore 21 through the plug 18 provides passageway for fluid trapped in the barrel 5 above the plug 18.

Mounted in the barrel 5 below the piston 8 is an annular shoulder 22, and a coil spring of a strength proportionate to the weight to be lifted, as 23, is mounted in the barrel 5, its lower end resting on the shoulder 22 and its upper end bearing against the lower face of the piston 8. A similar spring 24 is mounted in the. barrel 5 and its lower end abuts the plug 18 and its upperend bearing against the annular shoulder 25 which is integral with the'barrel 5. The strength of the springs23, 24 is determined by the weight of the fluid in the tubing, the combined strength of the springs being sufiicient to maintain the pistons 8, 15 in upper position against the weight of the fluid in the tubing.

The piston 15 has a downwardly extending stem 26 and mounted in the lower end of the barrel 5 is the standing valve 27 having inlet passageways as 28, 28 and dis charge passageways as 29. Upwardly extending from the standing valve housing 30 is a tubular chamber 31. The lower end ofthe stem 26 is enlarged to fit snugly within thechamber 31, and a spring as 32 within the chamber 31 constantly urges the stem 26 upwardly. .A bleeder line as 33 is mounted in the lower end of the chamber 31 for the discharge of fluids trapped within the chamber into the well bore. If desired, a suitable spring,

as the coil spring 34,,may be mounted in the lower en of the barrel 5 andabut against the piston 15.

A restricted orifice, as the choke 35, is mounted in the upper end of the barrel 5 above the piston 8. This fitting may have orifices of various sizes according to the depth of the well and the desired size of the ejection stream. This fitting will bear part of the weightof the fluid in the tubing so that only the weight exerted through the restricted opening need be resisted by the springs Mounted in the upper end of the tubing 1 is a suitable piston 36. The piston 36 is provided with suitable seal rings as 37', 37 and the lower end of the piston 36 is hollow, forming the chamber 38 from which there may be provided a plurality of discharge ports 39, 39. A coupling as '40 is connected to the upper end of the tubing 1, and with the well head 41, and the piston 36 operates through the lower end of the well head 41 and the upper end of the tubing 1. The internal face of the coupling 40 has an annular groove 42 which is inwardly beveled. Discharge outlet ports are formed in the coupling 40 which extend into the groove 42, and the discharge outlets as 2 are mounted in these ports at the desired position, and the discharge ports that are not to be used as outlet connections, will be provided with suitable plugs (not shown).

An actuating stem 43 extends upwardly from the piston 36 through the cap 44, which is provided with an axial port 45 for longitudinal movement of the stem 43 through the cap 44. Suitable stop means such as the annular shoulder 46 may be provided to limit the upward stroke of the stem 43. The annular stop 47 may be provided for limiting the downward stroke of the stem 43, and which will form a seat for the coil spring as 48. A cap 49 is mounted on the plunger 50 which extends into the stem 43, and the cap 49 forming the upper seat for the spring 48. Suitable actuating means such as the pitman 51 may be provided to move the plunger 50 longitudinally within the stem 43 to actuate the piston 36.

If desired, suitable booster means may be employed within the tubing 1 such as the piston 52 having seal rings 53 and having the check valves 54, such as a ball and cage, as shown, and having the axial passageway 55 therethrough. An internal'annular shoulder 56 is provided within the tubing forming a seat for the spring 57 and a suitable spear 58"is mounted in the upper end of the check valve 54 for ready removal of the booster from the tubing. As many boosters as desiredlruay be mounted in the tubing 1, according-to the depth of the well.

In operation, suitable means are employed to apply pressure to the piston 8 such as the means above described mounted in the top of the; tubing 1. The tubing is'filled with 'fluid and the weight of the fluid in the tubing bears-against the piston 8 and as the piston 36 is actuated and moves downwardly, the pressure thus exerted on the fluid in the tubing will move the piston 8- downwardly, compressing thesprings 23,24 and 34. As the pistons 8 and 15 move downwardly, fluid in the lower part of the barrel that has entered through the ports .28 and standing valve 27 will be forced through the 'pas'sageways'l t and the valve 12 into the tubular stem and will flow outwardly through the stem and through passageways 13', 13 into the barrel 5 above the piston 15. As the piston 36 moves upwardly relieving the pressure on the piston 8, the pistons 8 ways 39 into the discharge 2.- The upward movement of the piston 15 draws another volume of fluid through the 3 ports 28 and valve 27 into the lower portion of the barrel 5. The tubular chamber 31 balances the displacement occasioned by the presence of the stem 26 in the stroke of the piston 36, the spring 57 will move the piston 52 upwardly, causing an ejection of fluid out of the tubing 1 into the discharge outlet 2.

While the foregoing is considered a preferred form of the invention, it is by way of illustration only, the broad principle of the invention being defined by the appended claims. V

What I claim is: r

1. In a pump, a string of tubing, 21 barrel mounted on the lower end of thestring of tubing, pistons in said barrel, a tubular sternv connecting ,saidpistons, yieldable means constantly urging said pistons upwardly, a standing valve in the lower end of said-barrel, check valves in each end of said stem, a plug in said barrel above the lower most piston, said plug forming separate chambers above and below said lower most piston, a passageway in said plug through which said stem reeiprocates, passageways in said stem for passageway of fluid from below said lower most piston into the barrel upon downstroke and from said barrel through said stem into the tubing upon upstroke and a relief valve in said plug for relieving pressure between said pistons.

2. In a pump, a string of tubing containing fluid, a. barrel removably mounted in the lower end'of'said tubing, a restricted orifice in the upper end of said barrel,

pistons in said barrellongitudinally movable therein,

lower portion of the barrel 5 and the bleeder 33 prevents a and will permit a flow of fluid through the check valve springs constantly urging said pistons upwardly, a tubular stern joining said pistons, check valves in said stem, means for exerting pressure on said fluid to force said fluid through said restricted orifice at a high pressure to move said pistons downwardly compressing said springs and means for moving fluid from below said pistons into the barrel between said pistons and means for directing ajet of fluid 'from said stem through said restricted orifice into said tubing when said pressure is relieved.

-References Cited in the file of this patent f i UNITED STATES PATENTS

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