US940545A - Well-pump. - Google Patents

Description

W. A. MOGREGOR.

WELL PUMP.

PPLIUTION FILED APR. 12, 1909-.

Patented Nov. 16, 1909".

W1 Menzo WLLAM A. MCGREGOR, 0F BRADFORD, PENNSYLVANIA.

application tiled April 12, 1909.

Specification of Letters Patent.

Patented Not'. 165,., Mittel).

serial no. 489,359.

To all whom it may Concern:

Be it known that l, WTILLIAM fr. lillctnnoon, a citizen of the United States, residing at Bradford, in the county of lllclean and State ot Pennsylvania, have invented a` ld'ell-lump, of which the following a speeitication'. Y

This invention is an iniprovementin pumps, and relates more*especially to that lass which are employed in connection vvith oil Wells.

rlhe primary object ot' my present invention is to provide a pump cylinder with a standingY valve in connection therewith and forming a lower extension thereof, said parts being of such construction that they may be dropped into the well 'tubing and Will be securely held therein during the operation oit' pumping.

further object ot my inventlon is to provide the perforated bushing at the upper end ot the pump cylinderl or barrel with a check-valve which is not only ot assistance in the pumping operation, but also normally covers the openings in the bushing` so as tio prevent rivets, sand, and other particles from entering the pump cylinder' and i11- juring,r the Working Valve and packings of the piston.

A further object of my invention is to provide the bushing With a locking-nut or engaging-member at its upper end adapted to cooperate with a similar' locking-nut or engaging-member at the upper end of the piston-rod, so as to hold said piston-rod against turning While screwing connectingrods in place.

@ther objects and advantages of my invention will hereinafter appear, and what f l claim as novel will be more specially set forth in the appended claims.

tn the accompanying drawings, which form a part of this specifica-tion: Figure 1 is av vertical longitudinal sectional vieuv Showing the application of my invention to a well-tubing. Fig. 2 is a side elevation of the pump-cylinder and parts carried thereby. Figs. 3 and t are details hereinafter reerred to.

Like numerals of reference indicate like parts in all the figures of the drawings. n

My invention is adapted to be applied to the ordinary form of Well tubing, as illustrated in Fig. 1, in which 5 designates the tubing, and 6 a collar or coupling usually employed in connection therewith, the in ternal diameter of said collar or oouplinpbeing slightly less than the internal diameter ot the tubing. t'or the purpose hereinafter apparent.

ln Carrying out my invention l employ in the first placel a tubular easing' or cylinder T. forming the pump-barrel, and to the lower end ol" the ,same eonnert the standing valve El. the body portion ot which in the present instance is extended some distance beyond the punip-barrel` to receive the meanshertL inatter described which hold the parts o1 the device in place by trietional engagement with the inner side ol' the coupling or collar ti. The body portion Si provided inunediA ately below the standing' valve with a tzt-- pered seat 1t). at the lower end ot' Whit-h saidA body portion is reduced in diameter 'tor the reniainder of itsI length to receive a Yserios ot' leather rings tl. rontined between metal washers 12. said leather ring':y and washers be ing firmly clamped in plane by means ot' a per torated f-ap tln'eaded on thtl lower end ot' the aforesaid body portion or extension ot the standing-valve. As will be seen. the leather rings 11 are slightly Wider in diameter than the metal washers, and correspond in width, approximately, with the internal diameter ot' the eollar or couplingt5, so as to bind securely therein when the pump-barrel with its standing-valve are dropped in the Welltubingr. Vl'llien the parts are in place the` tapered ground seat 10 tits closely in'the contracted upper end ot' the collar or couplingr to forni a tight joint.. "the engagement of the extension ot the standing-valve with the colA lar or coupling` therefor serves to securely hold the parts of the pump in place in the Well-tubing, so that the barrel Will not be disturbed during the operation of the piston, and, also, so that the pump mechanism may be removed by extraordinary pulling force.

rlhe standing-valve is of the ball-valve type, with a reversible seat 14, the latter being held in place by the cage l5 which is screwed on the upper end of the body por tion 8 and Contains the ball 16.

ln the upper end of the cylinder' or pumpbarrel 7 is threaded a bushing` 17, through the center' ot which passes the piston-rod 1S of the pump, said bushing beingformed with a tlange 19 which overlies the upper edge ot the barrel. The bushing is provided with holes 20, through which the oil or fluid passes out or" the pump-barrel into the Well tubing, and centrally is provided with a round upward extension 2l, terminating at its upper end in an enlargement 22, in the form of an octagonal nut with which a wrench may engage for screwing and unscrewing the bushing, said enlargement being cut away at one side, shown, so as to lorm one member of a locking device with which co-acts a coupling' 23 threaded on the upper end ot' the piston-rod and similarly cut away at its lower end. rllhe coupling 23 is llattened at its opposite sides, as shown, to receive a wrench or tool, und is threaded at its upper end, as at 2li, to engage in a threaded socket 25 at the lower end of the coupling-rod Q6.

'lhe piston-rod is coupled at its lower end lo an ordinary form of hollow piston having a working-valve, but as l lay no claim to any part of the piston l have not shown saine herein.

llforking on the round extension 2l of the lnisliing between the enlargement or nut Q2 and body portion of said bushing, is a checkvalve 27, which is adapted to cover the holes 20 in the bushing when the pump is at rest, so as to prevent rivets, pieces of wood, dirt, sand, or other particles from getting into the pump-barrel and injuring the workingvalve or other parts of the piston. This check-valve is in the form of an annular plate, the outer upper edge oit which is pret erably rounded, as shown. ln connection with this check-valve or annular plate l may use a leather piece Q8, attached to the underside thereof and projecting beyond the outer edges ot' the valve so as to more edectually prevent the nner particles, as sand, from falling below the bushing, said leather piece forming practically a yielding lap or apron, which may fold upward to permit the oil or lluid to pass by the valve. lt will be observed, also, that the check-valve assists in the operation of the pump, in that it closes the upper end of the pump-barrel on the descent of the piston so that the oil or fluid will be forced to pass upward through the piston, said check-valve opening on the ascent of the piston so vas not to interfere with the upward ilow of the oil. rlhe essential oiiice of this check-valve is, however, to protect the mechanism of the pump by normally closing the holes in the bushing and in tact all that part of the well-tubing` below the bushing.

Having thus described my invention, what l claim as new and desire to secure by Letters-Patent, is

1. in a pump for oil-wells, the combina-- tion with a cylinder or pump-barrel and piston-rod, of a bushing secured in the upper end of the cylinder or pump-barrel and having an upward extension terminating in a head cut away at one side, ano a coupling on the piston-rod cut away at one side so as to interlock with the aforesaid head on -the bushing, substantially as shown and tor the purpose set forth.

2. ln a pump for oil-wells, the combination with a cylinder or pump-barrel, and piston-rod, of a bushing secured in the upper end of the cylinder or pump-barrel and having holes therethrough and an extension rising centrally therefrom, said extension terminating at its upper end in an enlarged oct a gonal head out away at one side, a checkvalve working on the extension below the head, and a leather apron secured to the underside ot the check-valve and projecting' beyond the outer edge thereof; together with a coupling on the upper end of the pistonrod cut away at its lower end to interlock with the head on the extension of the bushing, as herein shown and described.

ln testimony whereof l have signedmy naine to this specilication in the presence of two subscribing witnesses.

llLLlAM A.. MCGREGR. lliitnesses S. F. Mmmm-i, J. H. Hown.

Images