US1658517A - Double-acting pump - Google Patents

Description

member 37 and iny snug engagement with the inner wall of the working barrel 19, the sucker rod being provided with an enlargement 41 providing a shoulder engaging against the boss 42 on4 the member 37 when the member is tightened up. The sucker rod 39 extends upwardly through the tubing 43 as is customary and in order to provide a tight joint between ,the upper end of the working barrel and the sucker rod a packing sleeve 44 is provided. he packing sleeve 4,4 has a thickened end portion 45 1 edly received within said memberllt. Acf cordingly the packing sleeve 44 will wedge itself into position in the member 48 to provide a tight joint between the member 48 and the packing sleeve.

Within the inner enlarged bore of lthe `packing sleeve 44 and engaging` with the shoulder 50 at one end thereof is a compressible packing 51 which is held in compressed condition by engagement of the follower 52 therewith, said followerbeing held yieldinglyv in engagement with the packing member 51 by means of a kcompression coil spring 53 mounted between said follower and the plug 54 screw-threadedly engagingwith the internal threads on the upper end 47 of the member 44. It will be seen that with the arrangement of the packing sleeve described, if it is desired to remove the piston, all that is necessary is to pull upwardly on the same and by giving a blow to the sleeve 44 the same can be-,dislodged from the member 48 and the sleeve and piston pulled outwardly with the sucker rod. In a similar manner the sleeve and piston can be replaced, the sleeve dropping into wedging engagement with the member 48 as the same slide-s down on the sucker rod 39 into position within the member 48.

The end member 11 of the pump barrel is provided with a reduced screw threaded end portion 55 with which the sleeve 56 screw-threadedly engages, said sleeve 56 also engaging with suitable threads on the end of the lower section of the tubing 43 to rovide a tight joint between the pump barrel and said tubing.

yAn inlet chamber is provided below the partition 14 within the lower end of the pump barrel, the same being indicated by the numeral 57. Communication is established between said inlet chamber externally of the tubular member 25 and that portion lying within the tubular member 25 due to the perforations 26, the lower tubular end portion 27 of thek perforated tubular member 25 acting as an intake for the pump leading from the screen member 30. The valve 34 provides for `communication between the chamber within the working barrel 19 and the intake chamber 57 when the piston is on its up stroke, as the ball 34 will then'be raised from its seat. A tubular conduit..58

is provided leading from the inlet chamber i 57 through the partition 14 tothe valve member 59 which has a seat therein for the ball vvalve 60, the upward movement of the ball valve 60 being limited by the crosspin 61. From said valve member 59 a tubular conduit 62 leads through the elbow 63 into the upper end of the working barrel 19, a suitable internally screw ythreaded opening 64 being provided for receiving the member 63. Accordingly when the piston is on its down stroke the valve 34 will engage its seat while the valve 60 will be raised from its seat and oil will be drawn into the cylinder above the piston. Y.

The member 11 provides an outlet chamber 65` within the same that communicates with the interior of the tubing 43. A tubular conduit comprising the elbow 66 screwthreadedly engaging in a screw threaded opening 67 in the upper end of the working barrel 19 and the tubular member 63 extending through a suitable opening inthe partition 16, is provided for connecting the upper end of the working barrel with the outlet chamber, a valve member 69 having a ball valve 70 engaging with a suitable seat in said valve member and limited in its movement by the cross pin 71 being provided so that said valve will be unseated when they piston is on its upward stroke but will seat when the piston is on its downward stroke. A fluid tight joint is provided between the tubular member 68 and the partition 16 by means of the compressible packing member 72 and the nut 73 screw-threadedly engaging with suitable threads on the tubular member 68. In orderto provide a tight oint between the tubular member 53 and the par.- tition 14 a compressible member 74 is inserted between the shoulder formed by the enlargement 75 on the conduit'58 and said member 14.

A tubular conduit comprising the elbow 76 and theitubular members 77 and 78 is provided for establishing communication between the outlet chamber 65 and the lower end of the Vworking barrel 19. The elbow 76 screw-threadedly engages with a screw threaded opening 79 in the lower end of the working barrel, and the member 23 extends through an opening 8O in the partition 16. The tubular members 77and 7 8 are con# neeted `by means of the valve memberl which is providedv with aA ball valve 82f adapted to engage with a suitableseat in the valve member'8l and-:limitedin its upward movement by means of the cross pin 83. It will be evident that when the piston is on its down stroke thevalve 82 will be raised from its'seat to permit the oil in the working barrel to flow through the conduit comprising the members 76, 77 and 78 into the outlet chamber 65. In order to provide a tight joint betwen the partition 16 and the tubular member 78 an enlargement 84 is provided on the tubular member forming a shoulder between which and the partition 16 iSv mounted a compressible gasket 85.

It will thus be seen that the pump is double acting and that all the various connections provided to obtain the double action `for the pump are mounted within the pump barrel 10 so as to obtain a compact structure which has no exposed parts that might be subject to injury. The pump barrel l0 is, of course, mounted in the hole 86 in the oil sand 87 with thescreen 30 located near the bottom of the Well, and the tubing43 is mounted in the usual manner within ,the casing 88 which is provided with a suitable shoe 89 that rests against the rock cap A90 vthat exists above the sand 87.

What we claim and desire to secure by Letters Patent is:

1. In a pump, a pump barrel having inlet and outlet at opposite ends, a working barrel mounted in the pump barrel and having an inlet and an outlet, a piston operating in said working barrel, an inlet leading into one end of said pump barrel, a partition eritending between the side walls of said working barrel and pump barrel near the inlet end thereof to provide a chamber in one end of said pump barrel with which said inlet communicates andvalved inlet connections leading from said chamber to opposite ends y of said working barrel.

Y ing barrel and pump barrel near one endv thereof to provide an outlet chamber therein and valved outlet connections Vextending 2. In a pump.` a pump barrelhaving an inlet, a working barrel mountedin thepump barrel having spaced inlets, a piston operating in said working barrel` a partition ex-y tending between theside walls ofsaid working barrel and pump barrel near one end thereof to provide an outlet chamber therein and valved outlet connections extending from opposite ends of said Working barrel through said partition into said outlet chamber. f l

- 3. In a pump, a pump barrel having an inlet, a working barrel mounted in the pump barrel having spaced inlets,-a piston operating in said working barrel, a partition eX- tending between the side walls of said workbetweensaidf'barrels and throughrsaid par-k titionv intosaid outlet chamber.

4. In ,a pump, a pump barrel, agworliing barrel mounted therein, apiston operatingv insaid working barrel, an inletleading into one end ofsaid pump barrel, a partition ex tend-ing between theside walls of said workingbarreliand pump barrel near :the inlet end thereof to provide a chamber in one end of said pump barrel with which said inlet communicates, valved inlet connections leading from said chamber to opposite ends of said working barrel, a. partition extending between said working barrel and pump barrel near the other end thereof to provide an outlet chamber therein and valved outlet connections extending from opposite ends of said working barrel into said outlet chamber. 5. In a pump, a. pump barrel, partitions extending across said pump barrel near op! posite ends thereof to provide an inlet chamber at one `end of said barrel and an outlet chamber at the other 'end of said barrel, a.L

working barrel mounted between said partitions in spaced. relationk to said pump barrel and having spaced intakes, an intake leading to said inlet chamber, a. conduit leadkworking barrel mounted between saidV artitions in spaced relation to said pump arrel, aiiintalre leading to said inlet chamber, a perforated tubular member extending from said intake to, said working barrel, a conduit leading from said outlet chamber, a piston operating in said working barrel. and valved conduits leading from opposite ends of said working barrel to said outlet chamber.

7. In a pump, a pump barrel, partitions extending across said pump barrel near'ops posite ends thereof` to provide an inlet chamber at one end of said barrel and an outlet` chamber at the other end of said barrel, a working barrel mounted between said partitions in spaced relation to said pump bai'- rel, an intake leading to said inlet chamber, a perforatedtubular memberextending from said intakevto said working barrel, a valved inlet leading from said inlet` chamber into said working barrel, a conduit leading from said out-let chamber, a piston operating in said working barrel and valved yconduits leading. from opposite ends of said working barrelto said outlet chamber. l Y

p 8. In a pump', a" pump barrel, partitions extending across said pump barrel near opposite ends/thereof to provide an inlet cham- 'from opposite endssof` saidworking barrel sa y pump, a pump barrel, partitions t ber at one end of said barrel and an outlet chamber at the other endv of said barrel, a Working barrel mounted bet-Ween said partitions n spaced relation to said pump barrel and having spaced intakes, an intake leading to said inlet chamber, a conduit leading from said outlet chamber, a piston operatino in said Working barrel, one end ofV sai Working barrel being flared, a tapered pac-king sleeve wedgingly engaging with said c flared end thereof, and valved conduits leading from opposite ends of said Working barrel to said outlet chamber.

In testimony whereof we ax our signatures. f

CHARLES W. DANIELS. JAMES MARTIN CARPENTER.

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