US1616201A

US1616201A - Double-acting pump

Info

Publication number: US1616201A
Application number: US64110A
Authority: US
Inventors: Edward J Shearer
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-10-22
Filing date: 1925-10-22
Publication date: 1927-02-01
Anticipated expiration: 1944-02-01

Description

Feb. l 1927.

E. J. SHEARER DOUBLE ACTING PUMP Filed Oct. 22. 1925 A /x/VE/w ro/e, Md

ZIJ/gapen Patented Feb. 1, 1927.

nire srrs Mieli tries.

earner DOUBLE-ACTNG PUMP.

Application filed October 22. 1925. Serial No. 64110.

This invention relates to deep well pumps and has for its principal object the provision of a pump that will raise iiuid on both strokes so that the production of a well may be doubled.

Another object of the invention 1s to provide a .double act/iup` pump construction which permits oi2 the use of the simple, long lived ball valves, such as are preferred in oil well pumps.

Another objectof the invention is to provide a pump that is readily assembled, or taken down for repair or replacement ot' parts, in which pump, the' valves and valve seats are readily renewed.

Another object of the invention is to provide an improved piston or plunger for double acting pumps.

Another object of the invention is to provide a pump, particularly adapted for oil wells, in which protected trom sand which may settle down upon the pump from the tubing above.

Another object, of the invention is to provid-e a double acting` pump that is not appreciably greater in cost than a single acting pump of the same general construction.

Still other objects and advantages of my invention will appear hereinafter.

I have illustrated my invention by the accon'ipanying drawings in which I have illustrated one practica-l embodiment of my invention.

ln the said drawings Fig. l is a vertical mid section oit `the said embodiment, the parts in this view beingl shown in the respective. positions they assume during` the up stroke of the plunger.

ll 2 the saine but with the parts .in the positions they assume on the down stroke. l

Fig'. 3 is a cross section on a. line 3-3 0f Fig. l.V

Fig. d is a cross section on a line 4 4.- ot' Fig. l.

In carrying` out my invention in the embodiment illustrated I provide the tubular pump casing or jacket 5 externally threaded at each end at 6 and 7. At the lower end of the jacket there is provided a cup-like 'fitting S having` a coaxial inlet opening' 9. Over the opening, there is fitted a valve cage l0, the hitting provides an integral seat ll under the cage. Hthin the cage, there is disposed the standing valve 12 adapted to4 pump, the plunger is well.

rest upon the seat ll to prevent return flow or' fluid through the opening 9. l

Vfithin the jacket, there is provided reciprocal plunger ld that will be further' described herenafter. Said plunger includes a working1 valve seat member 15 hired relative to a working valve cage member 16. From them-einher 16, there is continued a plunger tub-e 18 that is iitted at theupper end with a ring 19 to which the pump rods (not shown.) may be attached. The plunger tube provides a bore 2O vthrough which iuid may rise, and the upper endv of the tube is provided with perforations 2l, for the escape of the fluid.

lt' will be apparent now that the plunger and its working` valvewill coact with the jacket and standing valve in the same manner in which like parts cooperatein the usual .single acting; pump. As the plunger ascends, it draws luidtluough the standing valve, and raises the fluid-that isjabove the working. valve.

To make the pump, double acting, l provide an upper coupling 22 'that includes'intake balls and seats 23 and 24 respectively, and discharge balls and

seats

25, and 26 respectively. two chambers 23a and 25a, by a wall 27.' Both chambers lead upwardv through the coupling as at 23" and 25". Thecoupling connects the jacket to the tubingv 27, through which fiuid is carried to the surface. rlhe coupling` is provided with a plurality of discharge ports 29, iutorwhich are screw seatedv the valve seats 26.

Above each discharge port, .integral iingers 3l are provided to form'v a cage' Vfor the corresponding ball, to limit lits upward movement.' and to allow fluid to pass while the ball is in the position Ashown 'in F ig. l. lnletports 32 arealso provided in the coupling. Saidy ports openI from the side of' the couplingand lead downwardlythrough the coupling; and through the inlet chamber. For each inlet port, there is provided the integral seat 241, and below each inlet port, a ling'ered cage 34 is screw-threaded into the coupling. The inlet seats are so arranged that they may be ground by passing a tool through the underlying' cage and causing' it to Work against the valve seat. The discharge valve seats are removable for grinding or replacement.

The plunger tube is a close working tit The coupling` is divided intol esV los

screws 41a. The working valve ball Ll2 is placed in its cage before the seat and cup parts of the lower part of Y decreases,

leather are secured by the screws L11. All plunger are readily removed for inspection, repair or replacement, and the upper coupling is also readily removed from the pump for inspection, repair or replacement of the ballsand seats.

In the operation of the pump, the plunger is first raised to accomplish its upstroke, the parts assuming the position shown in Fig. 1. As the plunger rises, fluid is drawn into the the main pump chamber, through the standing valve and inlet port 9. During the upstroke, fluid above the working valve is forced upward through the discharge valve as indicated by the arrows. Then the plunger first moves upwardly,the fluid drives the intake balls up against their seats, as shown in Fig. 1, thus preventing the fluid from being forced back into the well. During the up stroke of the plunger, the working valve is closed.

lVhen the plunger' descends, the standing valve closes and all fluid below the plunger is trapped. As the space below the plunger the displaced fluid rises through the working valve and the plunger tube, and enters the tubing above the pump through the perforations. Y

It will be apparent now that fiuid is raised through the tubing on both strokes of the plunger. When the plunger is descending, the discharge valves in the coupling close and a pressure diminution is created in the pump chamber above the descending plunger. This induces fluid through the inlet ports and valves so that the pump draws oil from the well on the downstroke of the plunger as well as on the upstroke.

It will be apparent now that each stroke of the plunger draws Huid from the well, and each stroke also impels fluid upward through the tubing and the pump is therefor truly double acting and of double the capacity of the same size of single acting pump.

lt sometimes happens that when an oil well has been pumped foi1 awhile and the operation of the pump has been discontinued that the well starts to flow, and in this event, oil will pass ball check 23 and when the oil develops sufficient pressure, ball check 25 will be lifted from its seat to permit the oil to flow upward into and through tube 27. Likewise the pressure of the oil will force ball checks 12 and 4t2 off their seats so as to permit the oil to flow upward through duct 20 in piston rod 21.

Thus it will be seen that l have provided an economical, readily assembled, double acting pump of simple construction, adapted to lift and discharge fluid on both of its strokes, and, while I have shown and described a specific embodiment of my invention, l do not limit myself to any specific construction or arrangement of parts and may alter the construction and arrangement of parts as I desire, without enlarging the scope of my invention, as set forth in the appended claim.

I claim as my invention:

In a double acting pump, a cylinder, an inwardly opening ball check valve at the lower end thereof, a hollow fitting at the upper end of said cylinder, the lower portion of the chamber within said fitting being divided by a diametrically arranged partition, a plurality of ball valve seats removably seated in the lower portion of said litting on one side of the partition therein, downwardly seating ball check valves adapted to rest on said valve seats, a plurality of upwardly seating ball check valves arranged within the chamber on the other side of said partition, a lingered cage removably seated in the lower portion of the fitting beneath each upwardly seating ball chock valve, a piston arranged for operation within the cylinder and a tubular piston rod connected to said piston and extending upwardly through the center of said fitting between the chambers that are formed in the lower portion thereof.

In testimony whereof I affix my signature.

EDWARD J. SHEARER.