US1301068A - Working barrel for oil-well pumps. - Google Patents

Description

W. IVICGREGOR.

WORKING BARREL FOR OIL WELL PUMPS.

- APPLICATION FILED JUNE Il, 1918. 1,3@1,068

Patented l Apr. 15, 1919.

'AANWMANA AWORNEYS,

" ED STATES finfiijaivfr ormoni.

WILLIAM A.' MCG'REGOB, OF BRADFORD, PENNSYLVANIA, ASSIGNOR T0 MCGREGOB WORKING' BARREL COMPANY, INC., 0F BRADFORD, PENNSYLVANIA.

`WOBKING BARREL FOB OIL-WELL PUMPS.

Specification of Letters Patent.

Patented Apr. 1 5, 1919.

Application iled June 17, 1%?18. Serial No. 240,444.

T0 all whom z't may concern Be it known that I, WrLLIAM A. Mo- Gniicoiz, a citizen of the United States, re-

siding at Bradford, in the county of Mcare lowered into the well tubing to provide a pump-barrel independent of said.' well tubing which may .be removed with the .parts 'it carries for inspection and repair.

My invention contemplates the provision of devices connected to the upper end of the working barrel to assist in`holding the latter in place and to prevent sand, broken rivets. and other foreign particles from etting into the working barrel to'inter ere.'

with the .operation ofthe pump-piston or passing down the outside of said workingbarrel to its seat.

My invention also contemplates a particularconstruction of standin -valve for the lower end of the workingarrel and cooperatin with the devices at the upper end thereof or firmly and securelyholding said working-barrel in the well-tubing to insure a proper operation of the pumping mechanism and to facilitate the removal of the pump for inspection and repair.

With these particular objects in view my invention consists in the' construction and arrangement of parts producing an iinproved working-barrel; all as hereinafter fully described and specifically pointed out in the claims.

In the accompanying drawings:

Figure 1 is a side elevation, partly in section, showing the application of my improved working-barrel and coperating parts. f

Fig. i? is a sectional view through the Working barrel and coopera-ting parts at the upper and lower ends thereof.

Fig. 3 is a detail view of the bushing in the upper end of the working-barrel.

Fig, 4 is a lan view of the cup-shaped working-barr retaining device.

Figs. 5 6, and 7 are views illustrating a. modication of the working-barrel retaining device.

Figs. 8, 9 andl() are views illustrating a second modication 'of said device.

Referring to the drawings, 15* and 15b designate the lower sections of an oil well tubing or casing which are, in the present instance, connected by an interposed` short tubular section or coupling 16,'the internal diameter of which is less than the internal diameter of the aforesaid sections lof the well tubing or casing and the upper end of which is beveled internally, as at 16a, to form atapered seat to receive the standingvalve, hereinafter described. This short section or coupling 16 is preferably made of heavy steel to give the required body and stability, and s0 that the upper end .thereof may be ground to provide a smooth hardened seat. i

17 designatesthe removable working-barrel of the pump, in which an ordinary valved pump-piston (not shown) is worked through the intervention of a piston-rod 18, said working-barrel being made either of drawn seamless steel tubing or of brass tubing with a smooth inside finish for the effective operation of the pump-piston therein, and is of slightly less diameter than the internal diameter of the well tubing or casing so that it may be `easily lowered thereinto and preferably of greater diameter than the internal diameter of the afore-mentioned lc5 i coupling 16. Into the upper end of ,this

working-barrel is threaded a bushing 19,

' having a central upwardly projecting extension 19a terminating in a head 19", the bushing and extension having a vertical bore through which the pump-piston 18 passes,

into "the upper part of the-well-tubing or casing. The holes or outlets fromv the working-barrel are closed on the down-stroke of the pump-piston by means of a check-valve 21 slidable on the extension 19a of the bushing, and in the present instance this checkvalve is cup-shaped, as shown in the drawings, with the rim extending upward so that the bottom` or disk portion will close over the openings in the bushing and the rim will serve to catch broken rivets and other particles which may drop down the well tubing or casing to prevent the same from getting into the working-barrel through the holes 20.v It will benoted that the diameter of the cup-shaped check-Valve is lessl than the internal diameter of the well tubing or casing to permit the oil or liquid from the outlet openings or holes 20 to pass around the'same.

The working-barrel 17 may be threaded directly on to the lower end of the bushing 20, as shown in Figs. 5 and 6, or coupling devices maybe interposed, as shown in Figs. 1 and 2, the latter arrangement providing for the application of the preferred form of the device for retaining the Working-barrel, &c. For this purpose a sleeve or coupling 22 is threaded on the bushing and has its lower portion reduced in diameter to receive a second sleeve or coupling 23 threaded on the .end thereof, the upper end of the last mentioned sleeve or coupling coperating with an annular boss 24 on the companion coupling 22 to hold in place a cup-shaped leather ring 25 adapted to fit snugly within the well tubingor casing 15a to not only v firmly hold the working-barrel in place but eii'ectually prevent sand or other particles from passing down between said workingbarrel and casing to the seat 16a on which the standing-valve rests. L

The head of the extension on the bushing is cut away at one side to form one part of a couplingdevice for connecting the pistonrod to said bushing, the other parts of the coupling device being formed by an enlargement on the piston-rod' having a downward projection adapted to interlock with the aforesaid head of the bushing when the piston-rod and pump-piston are lowered to their fullest extent; it being understood, of course, that in the operation of the pump the enlargementv on the piston-rod reciprocates a suitable distance above its companion coupling vmember on the bushing.

At the lower end of the working-barrel 17 I provide a standing-valve of particular construction which 'is adapted in the present instance lto coperalte with the cup-shaped leather ring 25 for rmly and securely holding the working-barrel, and the pump, in the well tubing or casing. With this end in view the standing-valve comprises a casting or body portion 27, on the reduced upper end of which is threaded a valve-cage 28 containing a ball 29, and on the lower end of which is threaded a sleeve 30 retaining in place a leather packingl, the latter being 'preferably composed of superimposed rings, vas shown, and tapered so as to fit snugly within the seat 16a at the upper end of the section 16" ofthe well tubing or casing. To

receive the leather packing which coperates with the seat the aforesaid castingor body portion 27 is reduced atv its lower end fora considerable portion ofl its length leaving a shoulder against whichjthe upper endfofthe packing abuts, and above this shoulder the 'casting is tapered, as at 27a, to provide an of the well casing. The rings :forming the y leather packing are clamped between `the 'afore-mentioned shoulder and the sleeve which is threaded on the lowerend ofthe casting. The casting Aand sleeve `are bored centrally for the passage o ftheoil through the standing-Valve, andlto strain the ,oil a perforated cap-,is threaded'in the lower end of the sleeve. It will be understoodfthat the leather packing is relieduponto wedge securely within the upper `end ofthe section 16 of the well casing-and assist -in holding the working-barrel in place, and that-the auxiliary packin,f 1-ring27al comes, intoplay only when the said leather packing isfworn away so asto support the working-barrel until it is removed and a new leather-packing applied. f f

To provide ehestandingmiv withv @here lmetal seat for thel ball r29, as steel ring 32 is let into the lowerpend of .thevalve-cage, being held in place v between the upper endof the casting and an inwardly-projecting flange on the band forming the lower` end of the valve-cage, asjshown inbFigq 2. fl

The modication shown lin Figs. 5, 6 and7 consists in providing vthe upper 4part-ofgcthe bushing'19 with an annularfgroove 19d' (Fig, :y

6) in which is seateda packing-ring 35j, of leather, ber, ory other suitable,1naterial`, the upper rim-flange 119. of said bushing lbeing made a little wider ,for the. purpose ;Vr while in the modification shownin Figs. 8,19 and 10,

a composite washer is'theldin place between the upper endof Athe.,working-barrel and rim-flange 199011, .the -busl.1ing,fineachA instance the working barrel ,n i lbeing threaded directly on the bushing and consequently the e couplings 22 and 23, employed in; the con-` struction shown in Figs-,.1 and 2, Adispensed with. However, the-form ofring-packing shown in Figs. 1 and2 is preferredas it is` more effective in its purpose of, holding-the fi;

barrel and keepingfout,sandgandwothersmall particles. e Y 7 In the modification in-.which thepackingiis ring is clamped between theupper endf ofthe working-barrel and the rim-flange on :the

bushing (Figs. 8, 9 and-1().), sai d packingring is composed o'ffa rin of--leather,

fiber, or like suitablel materiahgwithgafrenv forcing metal 'ring 3,7 at one side havingleirtensions or lingers V37?? which are hentai-,ouml the outer and uppersides'- ofthe l" ther ring, as shownin Fig..10,servfing. force the leather roriber porjtlonz.;` f

In the operation of'my impro'ved-:working barrel it is lowered intov the well tubing-foi; casing by the piston-rod, with the pumpico piston bearing against the underside of the coupling 23 (Figs. 1 andv 2) or the bushing 19 (Figs. 5 and 6), and after the standingvalve is seated the piston-rod is pushed down until it is coupled to the bushing and then turned to force the standing-Valve or packing thereon tightly into the coupling or section 16 of the well casing and simultaneously expand the coperating ring-packing at the upper end of the working-barrel into close engagement with the well tubing or casing. Inasmuch as the standing-valve is well seated by the intimate engagement of the packing thereon with the interposed short section 16 of the well'casing, and the ring packing at the upper end of the working-barrel 1s in frictional engagement with the well casing the-.working-barrel is firmly and securely held against Amovement during the operation of the pump, and said ring packing in connection with the cup-shaped check-Valve will effectively prevent the ingress of particles which might interfere with the proper Operation of the apparatus.

AAlthough I have, shown myl improved working-barrel applied to a well casing provided with an interposed section or coupling to form a seat for the standing-valve it will be understood that it may be used in connection with a well having a fixed working-barrel; that is to say, my improved removable working-barrel may be used in place of the old working-barrel, and in such instance it will seat in the upper end of the old working barrel in the same manner as in the interposed short section of the well casing. In either instance I purpose having the external diameter of the removable working-barrel slightly greater than the internal diameter of the standard or fixed working-barrel so as to permit the use of a pump-piston of standard size. y

Having described my invention, I claim:

1. In a well-pump, the combination with a tubing having a section forming an internal seat, of a working-barrel having a packing at its lower end fitting saidlseat, a bushing at the upper end of the working-barrel having outlet openings and a central extension, a cup-shaped check-valve working on said extension to cover the openings in the bushing, and a ring packing at the upper end of the working-barrel itting tightly in the well tubing,"substantially as shown and for the purpose set forth.

2. In a well pump, the combination with a tubing having a section forming an internal seat, of a working-barrel, a'standing-valve secured to the lower end of the Workingbarrel and having a packing fitting tightly in the upper end of the aforesaid section of the well tubing, a bushing at the upper end of the working-barrel having outlet openin s therethrough, and a cup-shaped checkva ve on said bushing to close the aforesaid openings. A.

3. In a well-pump, the combination with a tubing having a section forming an internal seat at its upper end, of a worlng-barrel supported in the tubing onsaid seat, a bushing at the upper end of the working-barrel having outlet openings and a central upward extension, and a cup-shaped check-valve slidable on said extension to cover the outlet openings and catch pieces of metal &c., sub-v stantially as shown and described.'

4. In a well-pump, the 'combination with a tubing having a seat in the lower portion thereof, a standing-valve threaded in the lower end of the working-barrel, a tapered yielding packing on the standing-valve tting in the aforesaid seat, an auxiliary packing-ring on the standing valve above said yielding packing, a bushing in the upper end of the working-barrel having openings therethrough and an upward extension, a cup-shaped check-valve on the extension to cover the openings and prevent rivets, &c. entering the same, and a yielding packingring at the upper end of the working barrel below the upper end of the aforesaid bush` ing and fitting within the well tubing.

WILLIAM A. MCGREGOR.'

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