US2460179A

US2460179A - Combination pump

Info

Publication number: US2460179A
Application number: US600750A
Authority: US
Inventors: Walter L Knott
Original assignee: LESTER B CLARK
Current assignee: LESTER B CLARK
Priority date: 1945-06-21
Filing date: 1945-06-21
Publication date: 1949-01-25
Anticipated expiration: 1966-01-25

Description

Jan. 25, 1949. W. L. KNOTT 2,460,179

COMBINATION PUMI? Filed June 21, 1945 IN V EN TOR.

WALTER LKNoTT. BY

Quay. (aw S Patented Jan. 25, 1949 wow 2,460,179 coivrBmA'rIoN PUMP ave-nee Knott, Los se ue oam, "assignor to Les'trBfiCl'ark, Hiiuston,-'1 ex.

s ucauonrune'zl, 1945, SerialNo. 600,750

2 Clainis. l

"The inventionrelates to a combinationlpump of the type used in producing liquidirom wells.

There are generally'two types of pu p 'in'pumping wells, the type including working barrel and a plunger for reciprocating therein, and the type generally known by the trade as a fluid packed pump where concentric sleeves slide one within the other to provide a seal.

Each of these-pumps have their peculiar adu vantages and disadvantages due to leakage, wear,

andthe effect of foreign-matter upon the parts.

The present invention, however, contemplates a combination of the plungerand-the working barrel type or" pump with the concentric sleeve type of pump to produce a construction which apprcpriates the better features of each. I I

It is one of the objects of the invention "to provide a combination fluid pack and'plunger pump wherein the upper portion of the pump is sealed with a reciprocating sleeve construction and the lower portion of the pump constitutes a plunger working against iron surfaces so as to obtain a maximum sealing and wearing effect.

Another object of the invention is to provide a concentric sleeve type of pump wherein the sleeve is elongated to provide a plunger to operate in a working barrel.

Another object of the invention is to provide a deep well pump with an operating plunger whose upper end is sealed with a concentric sleeve.

Other and further objects of the invention will be readily apparent when the following description is considered in connection with the accompanying drawing, wherein- Fig. l is a vertical sectional view of the pump installed and in operating position in the well.

Fig. is a side elevation of the Well equipped with the pump construction.

In Fig. 2 the well bore 3 has been drilled and equipped with a casing 4 having the usual casing head 5 thereon. A. string of tubing 5 has been run into the well and is connected to the perforated strainer or screen I so that the liquid from the producing formation 7' may enter the tubing.

The tubing 6 is seen enlarged in Fig. l and is made up of the sections such. as 5, S, and i9 connected together with the couplings i The pump construction is shown as having been incorporated in the section B and is made up oi a lower bushing I5 having a tapered seat IE thereso as to receive the standing valve 57. The standing valve carries the valve member l8 confined by a cage i9 so that when there is a suction above the valve, a flow of liquid from below the standing valv will "move therethrough as in'jdy cated'byth'e arrow 2fl. This standing valve may have the threaded pin 2| thereon by which --i t may be removed or inserted,

'It is a 'well recognized fact that steel working against "aniron surface provides a combination which will form a seal and will result in long continued service. -fIhe iron surfaceis provided hereln'asb'eing inadeup'of 'a' plurality of 'members 25 di'spo'sedwithinthe'tubing 'section'8. Any desired number of these members maybe applied end toend relative to each other, eachmem ber preferably having a 'recess'ed area j 2 6 "to receive the extension Z'lof the next memberzt there'- above. Eachof these members has an opening tli'erethrough so as to provide 'a1working surface "which is "equivalent to the usual working bar"- rel in a plunger type of 'pump.

The plunger in this invention is in t e term of enumerated pipe "orsl eeve 32 preferably made of steel whose outer surface 3| is arranged for recip-rocating movement upon the inner surfaces 30 of the bushings such as 25 and 28. A number of these members may be placed end to end so as to provide a suitable'length which may be up to 15 feet or 20 feet.

All of these members such as 25 and 28 are fitted within the tubing section 8 and then confined by the collar 33 so that they are firmly arranged in position. A retainer pipe 34 is threaded at 35 into the collar 33 so as to form a compact assembly. The coupling 36 connects the collar 33 to the tubing section 8.

The lower end of the working sleeve or tubing 32 preferably has a rounded lower end to guide the sleeve into position and carries a traveling check valve 38 which in operation will open as the plunger moves down but will close on the upward movement so as to create a suction in the chamber 39 above the standing valve 18 in order to draw in a new charge of liquid from the well on the up stroke. 011 the down stroke the standing valve 18 will close and the liquid which is thus trapped in the chamber 33 will be forced to pass. upwardly through the traveling valve and into the hollow interior 40 of the sleeve 32.

The sleeve 32 is of a substantial length and projects above the collar 33 into the tubing section 9 and has the head 4| substantially held at 4'2 thereon.

This head 41 carries a cage 13 and the upper traveling valve 44 which tends to close the passage 40 on the up stroke and allows the flow of liquid through the plunger into the tubing area 45 on the down stroke. A string of sucker rods 45 is connected to this head to cause the reciprocation and pumping action of the sleeve 32.

Great difliculty is encountered in the usual type of plunger pump due to the fact that sand and other matter being pumped along with the oil tends to'isettle in the tubing when it is pumped into thee'nlarged area 45 of the tubing. One of the advantages of a concentric sleeve type of pump is that sanding up of the working barrel is avoided due to the concentric sleeve arrangement. The present invention therefore contemplates a construction to accomplish this advantage and an outer sleeve 50 is therefore substantially held in place at on the outer periphery of the head 4| and is] concentrically arranged relative to the working sleeve 32. This sleeve 50, however, is considerab y shorter than the working sleeve 32 and in the lowermost position of the plunger, the lower end 52 of this sealing sleeve 50 will closely approach the collar 33 as best seen in Fig. 1. The

sleeves

32 and 50 will be spaced apart to provide an annulus 54 therebetween. This annulus will be filled by the standing sleeve or tubing 55 threaded at 56 into the upper end of the collar 33. This provides an elongated sealing surface between the outer periphery of the upper end or" the working sleeve 32 and the inner periphery of the sealing sleeve 50. If desired, vents or breather openings 58 may be provided in the inner workin sleeve so as to accommodate the expansion andcontraction of the annulus 54 during the reciprocating movements.

In actual operation the advantages of a plunger and working barrel type of pump are obtained due to the lower construction of the sleeve 32 while the efficiency and long service of a concentric sleeve type of pump are obtained from the combination of the sleeves 5D and 32.

What is claimed is:

1. Atpump for wells including a tubing in the well, a standing valve in the tubing, a plurality of iron bushings disposed in said tubing above said valve, said bushings being hollow to provide a working barrel, a collar in said tubing to anchor said bushings, a standing tube extending upwardly from said collar, a plunger including a head and a pair of concentric spaced tubes depending therefrom to seal on the inside and outside of said standing tube, the inner of said tubes being of a length to extend into said bushings to work therein whereby a combination sleeve packed and working barrel seal pump is provided.

2. A pump for wells including a tubing in the well, a standing valve in the tubing, a plurality of iron bushings disposed in said tubing above said valve, said bushings being hollow to provide a working barrel, a collar in said tubing to anchor said bushings, a standing tube extending upwardly from'said collar, a plunger including a head and a pair of concentric spaced tubes depending therefrom to seal on the inside and outside of said standing tube, the inner of said tubes being of a length to extend into said bushings to Work therein whereby a combination sleeve packed and working barrel seal pump is provided, said plunger having a pair of spaced traveling valves therein.

WALTER L. KNOTT.

REFERENCES CITED The following references are of record in the his of this patent:

UNITED STATES PATENTS Number Name Date 1,545,475 Adams July 14, 1925 1,801,304 Carson Apr. 21, 1931 2,067,774 Matthews et a1 Jan. 1937