US1634279A - Multiple-stage pump - Google Patents

Description

July 5,1927.

, W. WERNER MULTIPLE STAGE PUMP 3 Sheets-Sheet Filed March 19. 1926 July 5, 1927. 1,634,279

v w. WERNER MULTIFLEVS'IAGE PUMP Filed Maren 19. 192e s sheets-sheet 2 vmwy July 5,1927.J W. WERNER 634279 MULT IPLE STAGE PUMP Filed March 19. 1926 I5 Sheets-Sheet 3 provide a Patented July 5, 1927.

WILLIAM WERNER, or MEXIA, TEXAS.

MULTIPLE-STAGE PUMP.

Application led March 19, 1926. Serial No. 95,915.

My invention relates to pumps and particularly to pumps adapted to be employed in deep well work. It is not coniined to this particular use, however, as will more clearly appear hereinafter.

1t is frequently desirable to raise liquid from deep wells through a pump adapted to reciprocate withonly a short stroke. The diculty, however, with pumps in which the plunger moves through only a shortdistance on each stroke is that the capacity pump is thereby exceedingly limited and will necessitatethe rapid reciprocation of a pump rod in order to produce adequate re sults. There is a limit, however, on the speed with which a pump rod can be run safely and economically, and it is an object of my invention to provide a pump of large capacity and adapted to be operated on a short stroke of the pump rod. In order to do this, I contemplate the provision of a multiple piston pump which will be described in detail in the specication which follows. It is an Object of the invention to multiple stage pump which may be constructed cheaply and operated eiciently in all depths of wells.

rl`he invention resides particularly in the general construction and arrangement of the parts making up my improved device, tor an understanding of which reference is made to the accompanying drawings in which Fig. 1 is a central vertical section of a well casing or screen having, my pump arranged therein, illustrating the upper portion of the pump mechanism, and ig. illustrating the lower end thereof. Figs. 3 and 4 are sections similar to Figs. 1 and 2 but drawn in section at approximately right angles to the sections shown in Figs. 1 and 2. Figs. 5, 6 and 7 are transverse sections on the lines 5-5, 6-6 and 7-7, respectively, of Figs. 1, 3 and 4. Fig. 8 is a transverse section on the line 8-8 ot Fig. 2. Fig. 9 is a similar section on the line 9-9 of Fig. 2, and Fig. is a similar section on the line 10-10 oi" 2. Like numerals of reference are employed to designate like parts in all the views. In the drawing, I have illustrated my pump as being set within a strainer 1 of a well, said strainer comprising a pipe having openings 2 therein to admit the fluid Yfrom the well to the interior of the casing, where it may be received by the pump.

` .mp is secured atthe lowerend of a at s. ecaiparatively large diameter of the v but adapted to tit freely within the screen. rThe tubing is threaded at its lower endv to engage with a head 4`which comprises a castingthreaded to tit within said tubing and being oblong in shape between its ends forming a bearing for a plurality of outlet tubes 5 therethrough. Said tubes are adapted to reciprocate within bearing sleeves 6 fitting within openings longitudinally of the head. Said head is recessed as shown at 7' on one side thereof to provide space for the operation of a valve communicating with lthe chamber 8 below said head.

Said valve comprises a valve chamber 9 screwed within an opening 10 in the lower end of the head 4, as will be seen from Fig. 8. Said valve is placed at the side away from the two reciprocating tubes or plungers 5 and 5. The valve chamber has a lower downwardly flaring seat 11 to receive the head 12 of the valve. A stem 13 on said valve projects upwardly through the valve chamber and has a bearing at 14 within the hub formed at the upper end of the valve cage 15 secured to the upper end of the chamber. Above the valve cage the stem 13rv is formed with a plate 16 thereon against which a compression spring 17 is adapted to bear, thus holding the valve head 12 resiliently in its seat. It will he noted that this valve opens downwardly into the chamber 8 and when open will allow the passage of Huid from the i well into the said chamber.

The head 4 is secured at its lower end to the pipe section 18 of' the same diameter as the tubing, said section being connected at its lower end 19 to a second head 20, similar in all respects to the head 4, previously described. The section' 18 is of sutlicient length to provide a cylinder for the reciprocation of a pump piston 21. Said'piston comprises an upper solid head having threaded openings therethrough to allow connection therewith of the two tubes 5 and 5, previously mentioned. yThe lower end of the piston is hollowed out'on its interior, leaving`dowi1- wardly extending skirt 22 thereon at the lower end of which an outer ring 23 is secured. Between said ring and a shoulder 24 at the upper end of the piston a seat is provided or a sleeve 25 of packing material adapted to make a close sliding lit with the interior of the cylinder or pump barrel Yformed by the pipe section 18.

. The tubes 5,'and 5f are connected at their Yupper ends aber@ the head 4 to a valait? block 26, The shape of said block 26 is in dicated best in Fig. 5. lt has two openings therethrough, indicated at 27, the lower end oit' said openines being threaded to receive the upper ends o'l the tubes 5 and 5. A third opening 2S, approximately centrally ol: the block, is provided to receive the threaded lower end of a. pump rod 29, shown in .F ig. The upper ends oi the two openings 27 are provided with valve seats 30 formed. by rings counter sunk in the outer end oi? said openings and having their upper faces beveled outwardly to iorm a seat for the ball valves 3l and 32. Said valves are limited in theirmovei'nent away from the seat, thus provided, by a cage formed by a plurality ot posts 33 threaded wit-hin the upper end ot the block 26 about the said openings and connected with a plate 31.1. at their upper ends against which the ball valves will contact at the upper limit oit' their movement.

The tube 5 is slotted on one side at 35 to provide an opening trom the chamber 8 into said tube for the entrance oi fluid being pumped. The tube 5 has a similar slotted opening 36 on one side thereof below the piston 21 and adapted to communicate with the interior of the chamber 8 below the piston.

The pump may have as many pistons ot the construction described as are desired to lproduce the `full volume of fluid desired up to the capacity ot the tubing. I have ,shown two such stages, and in carrying out this construction, the tubes 5 and 5 are extended downwardly through the head 20, previously described, there being packing sleeves 37 through the openings in said head 20 to provide a close sliding lit tor said tubes in the same manner as occurs in connection with the packing` sleeve 6 in the head 4l. Below the head l is secured a second pipe section or pump barrel 38 which provides therein u chamber 39 in which a piston 4l() is adapted to reciprocate, said piston being secured at the lower ends of 'the two tubes 5 and 5', previously described. Said piston has packing ll thereon,as in case of the other piston, said packing resting upon the ring i2 at the lower end of said piston.

rl`he tube 5 is secured within a recessl t3 in theupper end et the piston head 40, said recess being .closed at its lower end. A slotted opening is provided in the tube 5 leading to the chamber 39 within the pump barrel. The tube 5 is connected in the head of the piston also but a passage l5 provided through the head of the piston leading to the hollow interior 46 ot the piston lll).

rlfhe lower end of the pump barrel 38 is closed by means of a plate-4l? which acts to support a standing valve for the said pump. Said valvel has a chamber 48 flaring toward its upper end to provide a seat 4 5) tor a valve 50. Said valve is adapted to open upwardly and has a stem 5] with a washer 52 at its lower end against which a spring is adapted to bear in such manner as to hold the standing valve resiliently in its seat. ',llhe valve cage 5ft supports the upper end olf said spring, said cage .having openings 55 therein to allow the passage oil. the fluid.

A standing valve must, of course, be provided for each stage of the pump and the standing valve tor the stage lirst described is positioned immediately below the piston 2l and within the upper end ot the head 20. lts construction is shown in el. and it will be noted that it is identical with the standingy valve just described. lt is, however, positioned at one side of the center ol' the head, as shown particularly in Fig. 6. The valve chamber is designated at 48', the valve head by the numeral 50, and the other parts being numbered as in the case of. the lower standing valve. rllhis valve allows the passage ot :fluid from the well screen Vupwardly into the chamber below the said upper piston 2l.

In the operation of this device, the pump rod 29 is reciprocated `from the upper end et the well and in so doing, the upper block 26 and the tubes 5 and 5 secured therein are likewise reciprocated. Considering the lower pump piston lirst, it will be noted that on the upstrolre of the piston l0 fluid will be drawn in from the well past the valve 50 into the pump barrel below said piston, and on the return, or down, stroke ot the piston the liuid will be forced upwardly through the tube 5 toward the surface past the valve 3l into the tubing. On the same down stroke, the chamber 39 above the piston will be filled with fluid by way oi the valve 9 secured in the lower end oit the head 20, said valve 9 being identical in all respects `with the valve 9, previously de scribed. The said valve 9 :is shown best in Fig. fl; of the drawing.

The chamber 39 being thus Filled with fluid, a passage is provided Vfor said 'fluid when the pump plunger moves upwardly, the said passage beingl byway ot the tube 5. rlhe vfluid linds entrance thereto through the slots d4 in the side thereon, and the upstroke ol the piston will torce the tiuid above said piston upwardly in said tube toward the surface, the valve $32 being i'mced troni its seat by the pressure oi' said `fluid, allowing the lluid to move toward vthe sui'- tace.

A similar action occurs in connection with each stage ot' the pump. `Consideing the pump piston 21, the downward movement oit the piston will close the standing valve 50 thereof and the fluid below the piston will titl Les/neve be `forced into the slots 86 to the tube 5 and thereby be forced upwardly pastthe valve 3l into the tube. On the downward stroke the tiuid will also be drawn into the chamber 8 by way of the valve l2, previously described, so that the chamber 8 will be thereby lillcd and on the upward stroke ot the piston the tluid in the chamber 8 will be forced through the slots 35 into the tube 5 and passed upwardly into the tube.

it will be noted that have p 1ovided two separate stages tor my pump, each ot which is adapted to operate to torce tluid upwardly in the tubing, both on the downward stroke and on the ugward strolte ot the plunger. The ultiniute eillect ot the operation oit the Jump wn in the drawing is to produce d impulses ot' fluid in the tubing on each it` .the olI the plunger. 'l am thereby enabled to produce a iiow ot large capacity in. the tubing althoueh the length ot' stroke may be short, and i is contemplated that a i nip. olf this nature i'nag.v be operated by devices having only a short period ot movement and thus overcome the usual. objection to the short stroke ype of punip and enable the operator to employ means tor operatingl which are otherwiseunavailable. My invention is not confined to the double action leaturc.

The adi'antages ol this type of construction will be obvious to those skilled in tho art.

Vilhatl claim as new and desire to protect by Letters Patent is:

l. A multiple stage pump ii'ioluding a tubing, a I Dlurality ot pump barrels, coupling heads connecting said tubing and said pump 'other in series, said heads having two lengt, idinal vpassages therethrough, a pump rod. pistons in said pump barrels, outlet tubes slidable in said passages and connecte..

-il bil l two up we r 'i pump rod and said pistons, inwardly opening valves at each end ot said pump barrels, said tubes being provided with openings to allow access ot' tluid there- .l pump barrels, the openings in coing above said pistons andthe the other being below said pise upper ends of said i le A multiple pump inCLdin pump barrels above said pistons, said tube having inlets above said pistons in the manner described.

Ll. A multiple stage pump including a tubing, a plurality ot pump barrels connected in series at the lower end thereof, coupling blocks connecting said tubing and said barrels and actin to close the' ends ot said barrels, piston` in said barrels, a tube connecting said pistons, means to reciprocate said tube, means allowing access of Huid from said pump barrels to said tube above said pistons and an upwardly opening Valve in said tube.

5. A multiple stage pump including, a tubing, a plurality o'l"r pump barrels, coupling blocks connecting` said barrels and closing the ends thereof, the upper block being secured to said tubing, pistons in said barrels, two tubes slidable in said blocks and connecting said pistons, means to reciprocate said tubes and pistons7 valves in said tubes and means to allow entrance to one of said tubes above said pistons, and similar means allowing entrance of fluid to the other tube from below said pistons.

G. A multiple stage pump comprising a tubing, a plurality ot pump barrels connected in series to the lower end thereof, coupling blocks between said barrels, standing valves both ends oi' each of said barrels,v

pistons in pump barrels, two tubes connected with said pistons and havino' openings therein to allow entrance oi .fluid into one oi" said tubes on the down stroke of said pistons and into the other tube on the up stroke thereof, means to reciprocate said piston and means to prevent the passage ot liquid downwardly in said tubes from the ripper end thereof.

7. A multiple stage pump including a tubing, a plurality of pump barrels connected in series to the lower end thereof, coupling blocks connecting said tubing and said barrele and acting to close the lower ends of said barrels, standing valves in said barrels, pistons in said barrels, a pair of tubes connecting said pistons and slidable in said blocks, and means to prevent passage downwardly of liquid in said tubes from their upper ends, said tubes having openings thereto below said pistons.

In testimony whereof I hereunto allix my signature this 12th day of March A. D. 1926.

WILLIAM WERNER.

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