US2068729A

US2068729A - Oil well pump

Info

Publication number: US2068729A
Application number: US731212A
Authority: US
Inventors: Basher Geoffery Guy
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-06-18
Filing date: 1934-06-18
Publication date: 1937-01-26
Anticipated expiration: 1954-01-26

Description

G. G. BASI-1ER 2,068,729

OIL WELL PUMP Filed June 18, 1934 2 Sheets-Sheet l Jan. 26, 193'?.

5/ m @4W/ f d A Mi ww. nl w 5%@ m w a gyfww@ Jan. 26, 1937. G. G. BASI-1ER OIL WELL PUMP 2 Sheets-Sheet 2 Filed June 18, 1934 Alw EOFFERY (5L/Y BASHER BY )7am @MM vf ATTORNEYS.

Patented Jan. 26, 1937 UNITED STATE FAB OFFICE 1 Claim.

This invention relates to double acting pumps of the general character embodied in my copending application Serial No. 715,744, filed March l5, 1931i, and wherein a relatively constant stream of oil is maintained in the entire system and is drawn upon during the regular functioning of the pump to effect a continuous now of oil from the well.

An object of the present invention is to provide a double acting pump which embodies a simplied structure to effect a continuous ow of oil from the well, by creating a single flow path for the discharge of oil from the Well into the column in the tubing above the pump during both strokes of the latter, more specically to provide an arrangement of elements enabling a hollow plunger rod to be Vutilized as the sole conduit for the passage of oil from the barrel of the pump to the oil column thereabove, all in such manner as to insure maximum recovery of oil.

Another object of the invention is to provide a pumping assembly which is capable of being readily lowered as a unitary structure to its working position and operatively associated with the parts to which it is designed to be related.

Another object of the invention is to provide a pumping assembly embodying extremely simple and ecient sealing means for preventing leakage of oil between its working parts so that the plunger of the pump will operate with maximum efficiency and with a uniform lift upon the oil.

With these and other objects in view, the invention consists in the novel construction and arrangement o1 elements as hereinafter fully described and particularly pointed out in the appended claim.

In the accompanying drawings,

Figure l is a vertical sectional View through the casing of a well and showing one form of oil pump embodying this invention mounted in the casing with the pump plunger assumed to be operating on the up stroke;

Figure 1A is a View similar to Figure 1 and i1- lustrating the lower continuations of the parts shown in the preceding gures;

Figures 2 and 2A are views similar to Figures l and 1A, respectively, with the plunger assumed to be operating on the down stroke.

In its present embodiment, the invention is associated with the usual well casing l5 and an assembly of tubing sections E6, shoe Il' and sucker rods i6, the shoe being connected to the lowermost tubing section by a coupling collar i9, and said lowermost tubing section being connected to the next tubing section above by a coupling collar 23 and an intervening outer sealing liner 2l in the form of a tube threaded at its upper end into the collar 2U and at its lower end into the lowermost tubing section.

The internal surface of the outer liner 2l is accurately machined to a predetermined diameter such as to snugly receive tubular inner liners 22 23 in the form of tubes accurately machined externally and rigidly connected in spaced relation by an axially disposed tubular guide 24 which is threaded into the confronting ends of the inner liners as shown in Figures 1 and 2.

The lower end of the inner liner 22 is reduced in diameter and externally threaded at 25 lor connection to a working barrel 26, the external diameter of which is slightly less than that of the inner liners 22 and 23 so as to readily pass through the outer liner 2l.

The lower open end of the working barrel 26 is controlled by a standing valve 2l, the seat member 28 of which is provided with a depending tubular extension 29 terminating in a tapered tubular nose 36 which is designed to seat in the correspondingly tapered bore of the shoe Il to secure the working barrel in xed position in the tubing, as will be clearly understood by those familiar with the art. Between the working barrel 26 and the lowermost tubing section l 6, an annular chamber 3| is formed, the inlet 3| a, to which is controlled by a ball valve Sib constituting a second standing valve and being supported axially within the tubular extension 29 and arranged to open when suction is induced in the chamber. An outlet from the chamber is provided by ports 32 which are located in the working barrel at its upper end. It will be noted that the size of the ball valve structure Sib is such as to provide ample space between it and the tubular extension 29 so as to permit the free passage of fluid between the two.

Reciprocably mounted in the working barrel 26 is a hollow plunger 33 which co-acts with the working barrel to provide chambers lllv and35, respectively, above and below the barrel. The inlet to the chamber 35 is controlled by the aforestated standing Valve 2l which opens when suction is induced in the chamber by the plunger. The outlet from the chamber 35 is controlled by a traveling valve 36 in the lower open end of the plunger 33, which traveling valve opens when pressure is created in said chamber by the plunger.

An inlet to the chamber 34 is provided by the aforestated ports 32 at the upper end of the working barrel, and an outlet from this chamber is controlled by a ball valve 31 constituting a second traveling valve which is axially sup-ported 'within an inverted cup-shaped connector 38 threadedly secured at its lower end to the plunger 33 and at its upper end to a hollow plunger rod 39 in turn threadedly connected to the lowerrnost one of the sucker rods I8. The size of the ball valve structure 31 is such as to provide suicient space between itself and the internal wall of the connector 38 for the free passage of uid from. the interior of the plunger and from the chamber 34 into the hollow plunger rod 39 from which the iluid is adapted to discharge into the tubing above the pump, through ports lil provided in the plunger rod at its upper end. The ball valve 31 is arranged to open when pressure is created in the chamber 34.

It will be noted that the plunger rod 33 has a snug t in the alined bores of the inner liners 22-23 and the intervening tubular guide 24 so as to provide a fluid-tight seal and accurately guide the plunger rod in its reciprocating movement.

In assembling the pump in the hole and assuming that the tubing I6 with the outer liner 2l and the shoe i1 has been lowered in the casing to the desired level, the pumping assembly suspended from the sucker rods is lowered into the tubing I6 until the nose 3i) has been rmly seated in the shoe I1 so as to secure the working barrel 26 in a fixed position, it being understood that the external diameter of the nose 33 is less than the internal diameter of the outer liner 2i so to freely pass through the latter as does the working barrel. With the pumping assembly installed, as shown in the drawings, the outer and inner liners co-act to provide the fluid-tight seal therebetween.

In the operation of the invention, and :assuming that the plunger 26 is'moving on its upstroke, as shown in Figures 1 and 1A, the traveling valve 35 will be closed so that suction is induced in the chamber 35 to suck oil from the well through the nose 30, extension 29 and seat member 28 into the chamber. Oil previously supplied to the chamber 34 from the chamber 3i surrounding the working barrel will be trapped therein, due to the fact that the ball valve 3lb controlling the inlet to the chamber 3| is closed, so that concurrently with the sucking of oil into the chamber 35 the oil in the chamber 34 will be placed under pressure. The ball valve 3? controlling the outlet from the chamber 34 is thus caused to be opened and the oil in the chamber 33 ejected therefrom through the plunger rod 39 and thence through the outlet ports 4D thereof into the oil column in the tubing I6 above the pumping assembly, all as clearly indicated by the arrows in Figures 1 and 1A.

On the down-stroke of the plunger 33, as shown in Figures 2 and 2A, the standing valve 21 will close, thus causing oil now trapped in the chamber 35 to be placed under pressure by the plunger so as to open the traveling valve 36 and eject the oil from the chamber 35 through the plunger, the plunger rod 33 and then through the ports 40 into the oil column in the tubing I6 above the pumping assembly.

Concurrently with this operation, suction will be induced by the plunger in the chamber 34, thus closing the ball valve 31 and opening the ball valve 3 lb to suck oil from the well into the chamber 3| surrounding the working barrel, and then through the ports 32 into the chamber 34. As the next succeeding upstroke is initiated, the cycle of operation is completed as the traveling valve 35 then closes and the standing valve 21 opens so that the plunger draws oil into the chamber 35,-concurrently with which thevball valve 3Ib closes and the ball valve 31 opens in response to the pressure imposed on the previcusly admitted oil in the chamber 3d, by the plunger 33.

It will thus be manifest that during both strokes of the plunger, oil from the well will be raised and advanced in the column of oil in the tubing so that the flow of oil upwardly is continuous, and all through the single flow course provided by the hollow plunger rod between the Working barrel and the oil column thereabove.

What is claimed is:

In a pumping organization for oil wells, the combination with tubing, of a liner interposed between and connecting sections of the tubing and having a uniform internal diameter which is less than the internal diameter of the tubing, and a pumping assembly contained in the tubing and including a working barrel having a smooth eX- ternally cylindrical liner at its upper end frictionally received in the liner of the tubing to provide a fluid tight connection therewith and coeacting therewith to normally hold both liners suiliciently associated with each other to prevent relative separation thereof when the pump is operating while enabling the pumping assembly with the barrel liner to be pulled from the tubing, said pumping assembly having a hollow recipro-v cal plunger rod provided with a long length hollow plunger working in said barrel and having a ball valve at its extreme upper end and a traveling valve at its extreme lower end, said tubing liner serving to space the walls of the barrel from the walls of the tubing to provide a chamber therebetween for movement of liquid from the well to the bore of the plunger through the ball valve on the upstroke of the plunger and said traveling valve serving to admit liquid to the bore of the plunger on the down stroke of the plunger; and valves at the bottom of the barrel co-acting with the valves of the plunger to enable the liquid' to be pumped as aforestated; all of said valves being formed, arranged and proportioned to enable all thereof to freely pass through the bore of the tubing liner when pulling the pumping assembly from or dropping same into the tubing.

GEOFFERY GUY BASHER.