US1769820A - Pump - Google Patents

Description

July Al, 1930.

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' ATTORNEY .H #I L n /A// WJ 7 1T Patented July l, 193@ g Marzo LYNNE D. BAIBJDY GF TULSA, OKLAHOMA PUMP Application led September 22,1926. Serial No. 136,983.

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It isla.. purpose of my invention to provide S a pumpl of the above mentioned character comprisinga hollow piston member, an operating member having a valve member thereon and means forymounting the piston on the support in such a manner that relative sliding movementis provided between the piston and the valvemember. IThis is preferably accomplished by providing the valve stem on the supporting member witha portion upon which the piston is slidable and by providing 'i5 means thereon to limit the sliding movement of the piston in opposite directions, one of the means'being preferably adjustable to adjust the range of movement lof said piston.

lt isa further purpose of my invention to provide anew andimproved packing in an oil well, or similar, pump mounted on the pis-y ton andengaging the barrel of the pump, said v,packing comprising a tubularmember having means for clamping the ends thereof 555 tov theerlterior of the piston and having means for admitting fluid under pressure between the packing and the piston to expand the packing against the barrel.V y

Other objects and advantages of the invention will appear as the description of the accompanying drawings proceeds. However, I desire to have itgdistinctly understood that l do not intend to limit myself to the exact details shown or described. But that l intend to include as part of my invention all such obvious changes and modilications of parts as would occur to a person skilled in this art and as would fall within the scope of the claim.

In the drawings: v Fig. 1 is a fragmentary sectionalview of the lower portion of an oil well showing my improved pump applied thereto.

Fig. 2 is a fragmentary sectional view of the pump on a larger scale, and

Fig. 3 is a perspective view7 partly broken away, of portions of the piston showing the same in disassembled condition.

Referring in detail to the drawings: My improved pump is shown as being mounted within the barrel which is provided inthe casing 1l that is seated in thel usual manner upon the cap rock 12 above the oil sand 13. Said barrel 10 is provided with theusual strainer member 1li located below the level ofthe oil`15 in the hole 16, said strainer being connected with the barrel 10 by means of a coupling 17 which carries the usual standing valve member 18.

- Extending into' the pump barrel. 10 is .a sucker rod 19 or other supporting member for actuating the pump. Said member 19 maybe provided with an internally threaded scclret 2O which receives the correspondingly threaded end lportion 21 of the valve supporting member 22. The member 22 is provided with an enlargement at 23 forming a shoulder 2a thereon facing upwardly and has a bevelled wallff'portion 25 merging. with the reducedportion 26. The reduced portion 26 of the member 22 serves as a valve stem having a' threaded lower end portion 27 upon which the valve member 28 having a bevelled face 29 is mounted. The valve member 28 is held in adjusted position by means of a ,cas-

tellated nut'30 which is held in Vadj usted posi- F tion by means of a Cotter pin 31 in the usual manner.v

' rlfhe upper crownl member 32 of the hollow piston is slidably mounted upon the unthreadedjp'ortion 33 of the member 32 between the shoulder 24 and the stop member 34e having screw-threaded engagement with its screwthreaded portion 35 ofthe member 22, the same being held in adjusted position by means of a locknut 3G, also engaging with the screwthreaded portion 35. The member 36 and upper crown member 32 may be provided respectivelywith annular, ratchet teeth or corrugations v37 and 38 whereby the same may be gripped by a suitable fishing tool when this becomes necessary. n

Thecrown member 32 is provided with an enlarged body portion 39which has longitudinally extending slots 40 leading into the grooves 41,' aligning therewith; The slots 40leadintothe central chamber or recess 42 providedgin theenlarged body portion 39 and said enlarged body portion 39 is preferably provided with an internally threaded end portion 43 which is adapted to screw-threadma` we'. ,1,

Y edly engage with the externally threaded end mata@ the inner wa portion 44 of the tubular body portion 45 of the hollow piston. The lower end portion of the tubular bod portion 45 is also provided with an externa ly screw-threaded portion 46 that en ages with the internal y screwthreade end ortion 47 of the lower crown member 48, said lower crown member 48 having a chamber 49 within the same to which the slots 50 lead.y Thus, when the valve is in the position shown in Fig. 2, connection is established between the space 51 below the piston and the s ace 52 above the piston in the barrel 10. his is the position of the parts on the down stroke of the piston. On the upY stroke of the piston, the upward movement of the member 19 will carry the member 22 with the same, the piston lagging behind and as a result, the valve 29 will enwith a valve seat 53 on the valve ring 54, having a flange 55 seated between the shoulder 56 on the member 48 and the lower end portion of the member 45, thus closing the passage 57 through the tubular member 45nd lift-ing the liquid, in the same and above the same in the space 52 upwardly. When the down stroke of the piston again takes place, the same being actuated by the downward movement of the member 19, the tendency will be for the piston to lag behind the member y22, thus causin the valve 28 to be unseated and moved to t e position shown in Fig. 2, whereupon the liquid in the space 51 below the piston will be admitted to the piston as the same moves downwardly. In order to obtain the proper. functioning of the purp described above, it is necessary theta pac ng be rovided which will firmly y fl portion of the barrel 10. "id'packiang preferably comprises a tubular or sleeve-l1ke member 58 which may be made of any suitable packing material that has the desired flexibility and resiliency, said member being yreferably molded in the form shown in ig. 3 with slightly convex wall portions 59 and substantially cylindrical end portions 60 with a shoulder 61 between said portions. The end portions 60 at one end of the packing member v59 preferably engage ilirooves 62 provided in the member 45, `member 45 having a thickened portion 63 that has an overhanging flange 64V to provide ,such rooves 62. The opposite end portion 60 o the member 59 1s engaged 1n a groove 65 formed between the overhanging ange portion 66 on the internally screwthreaded member 67 and the outer face of the tubular member 45. The member 67 has screw-threaded engagement with the thready ed `portion 44 and is held in adjusted 4position due to the engagement of the threaded end portion 43 of the member 32 with said readed end portion 44 as shown in Fig.' 2.

t will be seen that the position of the member 67 relative to the enlargement 63 can be varied due to the screw-threaded connection so as to obtain the proper clampin engagement with the ends 6() of the mem r 59 at opposite ends thereof. The tubular member 45 is further provided with a series of openings 68 which lead from the passage 57 into the space between the packin member 59 and the outer face of the tubu ar member 45. Thus the fluid under pressure within the barrel 10and within the passa e 57 will exert a force against the inner wal of the packing 59 causing the same to be firmly pressed into engagement with the inner face of the barrel 10 through substantially the entire length thereof with a substantially uniform pressure; thus a very effective seal is provided between the pump barrel and the piston.

It will be noted that in case of breakage of the valve member, the same will not become disassembled from the piston and furthermore, that the piston can be withdrawn in case any breakage occurs or renewal of the packing is necessary by an u ward movement of the member 19, without t e use of fishin Y tools, due to the fact that the shoulder 24 wi engage with the shoulder 69 provided on the inner face of the member 32 where the reduced bore 70 opens into the opening 42. Thus, even if the valve member is detached, the piston will be drawn upwardly alon with the other parts of the device by upwar movement of the sucker rod or other sup port 19.

What I claim and desire to secure by Letters Patent is A pump of the character described including a barrel, a iston including a tubular body, crowns at t e ends of the body, a valve seat retained to the bod by the lower crown, a stemextending throug the body, the crowns and the valve seat, a valve on the stem co operative with said seat, a stop member on the stem engageable with the upper crown to limit upward movement of the stem, and a st-op member adjustable on the stem and engagcable with the u per crown to limit downward movement o the stem.

In testimony whereof I ailix my signature.

LYNNE D. BAIRD.

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