US 2893325 A
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V. V. ROBERTS FLUID-PRESSURE PUMP July 7,(l |959 2 Sheets-*Sheet 1 Filed Oct. l, 1956 o o a f o o o mVENToR;
Viola VRoberS, BY
ATTORNEY July 7, 1959 A\/-. v. ROBERTS FLUID-PRESSURE PUMP sheets-sheet 2 Filed ocx. 1, 195s 1% m1 m mmf, 40 3 \\V\\ N V 8 Lr n VV n n M\ g 2 3 7 4.` l 8 0 5v 2. 3 5 @ad 2 ATTORNEX United States Patent() M FLUID-PRESSURE rUMrf 7" J viola V. Roberts, Harbor c1fy,ca1if.
Application October 1, 1956, Serial No. 613,212 1 Claim. (Cl. 10S-+234) This invention relates to pumps and more particularly to uid pumps for pumping oilv or water from wells.
'Ihe general` o bject of the invention is to provide a pump of thecharacter statedk which is "highly efcient and: economical in operation.
v .Amore particular object of the invention is to provide a simplepump with no moving parts, which can be manufactured at a low cost.
.Other objetcs and advantages will appear hereinafter as this specification progresses.
I ,The invention is illustrated in the annexed drawings, forming a part of this specification, in which: Y y 4 1 isa side elevation of a complete assembly of my invention. r
Fig.f2nis a vertical longitudinal section, on an enlarged scale, ofthe pump casing and its operating parts, which primarily extend down into a well. l f
"Fi'g.. 3 is a `horizontal. section of Fig.'2 taken on line 3-3 of Fig. 2.
Fig. 4 is a horizontal section of Fig. 2 taken on line 4-4 of Fig. 2.
Figs. 5 and 6 fare horizontal sections, respectively, of the air pressure valve at the lower end of the air lift outlet pipe, taken on line 5--5 of Fig. 2 when said valve is in closed position or when said valve is raised in open position.
Fig. 7 is a fragmentary vertical longitudinal section of the upper portion of a deep well pump embodying a modification of my invention.
Fig. 8 is a fragmentary vertical longitudinal section of the lower portion of the deep well pump of the modification of my invention shown in Fig. 7.
Referring more particularly to the drawings, in which the same parts are designated by the same reference numerals in all of the views of the drawing, my pump comprises a vertical well casing 1, a head 2 secured on the upper end of said well casing, a vertical pipe 3 eXtending downwardly through said head 2 and casing 1, a tubular inlet 4 leading at one side into said head 2, a plug 5 threaded in the outer end of said inlet 4, an air inlet pipe 6 leading through said plug 5 into said inlet 4, an outlet pipe 7 connected to the upper outer end of the pipe 3 by an yelbow 8, and an inlet va'lve 9 connected to the lower end of the pipe 3 in the lower end of the well casing 1. The inlet valve 9 comprises an outer vertical tubular casing 10, secured at its upper end on the lower end of pipe 3, an inner vertical tubular piston 11 slidably mounted in said outer casing 10 and a coil spring 12 in the upper part of said outer casing 10, bearing at its upper end against an internal shoulder 13 in the upper part of said outer casing 10, and bearing at its lower end against the upper end of said piston 11, whereby said piston is forced downwardly by said spring 12 against an internal annular ange 14 on the lower end of said outer casing 10, which iiange 14 is engaged by the lower closed end of said piston 11, which piston is closed at its lower end by a lower end wall 15. The outer casing is provided in its s'ide wall with a plurality of superp, 2,893,325 Patented July 7, 1959 ICC imposed inlet ports 16 and said piston 11 is provided with a plurality of superimposed inlet ports 17 adapted to register with said casing ports 16, when said piston ports 17 are raised with said piston 11 into register with the casing ports 16, in the manner hereinafter more fully described. Y
The air inlet pipe 6 leads from the upper end of an air-pressure tank 18, and an air-pressure pipe 19 leads from an air-pressure pump 20 into the upper end of said air-pressure tank 18. The lower end portion of the casing 1 is provided with a plurality of perforations 21, through which perforations uid, such as `oil or water, may flow into the lower portion of said casing from the surrounding earth formation. e 1.'
The operation of my invention, as above described,"is as follows:
Air under pressure is supplied by the pump 20, through pump outlet pipe 19, air pressure storage tank 18, pipe 6, inlet 5, head 2 and ycasing 1 to the upper :level 22 of the iiuid 23 in said casing,tand said air pressureagainst the upper level of said fluid puts the entire uid under pressure, whereupon an upward pressure is applied to the lower end wall 15 of the valve piston 11, which raises said piston until its ports 17 register with thezports 16 in the outer wall v10 ofthe valve 9 and tiuidk enters said valve and Vpasses upwardly through vertical kpipe 3 and out of the well casing through outlet pipe 7. Y
In the modification of my invention shown in Figs. 7` and 8, my pump comprises a well casing 25, ahead 26 secured on the upper end of said casing above the ground, a vpacker 27 interposed in Ysaid casing 25 at a suitabley dis-l tance below the surface ofthe earth adjacent thev surface of the oil in the casing 25, an air pressure pipe 28 leading downwardly through said head 26 and through the upper portion of said casing 25 into the packer 27, an air pressure pipe 29 leading downwardly through the head 26 into the upper part of the well casing 25 and through the packer 27 to a point immediately below the lower end of said packer, an air pressure pipe 30 leading downwardly through the head 26 and through the upper part of the Well casing 25, through the packer 27 and downwardly through the lower portion of said casing and into the upper end of an oil inlet receptacle 31, an outlet pipe 32 leading out of the upper end of said inlet receptacle 31 upwardly through the lower portion of said casing 25, through the packer 27 and upwardly through the upper portion of said casing and through the head 26 on the upper end of said casing and an outlet valve 33 on the lower 'end of said pipe 32 within the upper part of said inlet receptacle 31.
The head 26 comprises a iiat disc 34 extending across the upper end of the casing 25 and resting upon and secured in any suitable manner to an external flange 35 secured on the upper end ofthe casing 25.
The packer 27 comprises a cylindrical resilient or rubber sleeve 36 secured at its ends to discs 37 and 38, respectively.
The inlet `receptacle 31 comprises an elongated cylindrical shell 39 closed at its flower end with a semi-spherical end wall 40 and closed at its upper end with a straight end wall 41 through which extend the air pressure pipe 30 and the outlet pipe 32. The lower end portion of the wall of the receptacle 31 is provided with inlet perforations 42. The outlet valve 33 comprises a valve cage 43 secured at its upper end on the lower end of the outlet pipe 32, a valve seat 44 secured in the lower end of said valve cage and a valve ball 45 adapted to rest upon said seat to close said valve.
The upper end of the air pressure pipe 29 is connected by an elbow 46 to a pipe 47 leading from an air pressure tank 18 as shown in Fig. 1 of the drawing. The upper end of the said pipe 30 is connected by an elbow 48 to af: pipe 49 leadingfromr a pressure tank 18; The upper end.y of. the. air pipef28.- isY connected by anelbow 50 to a pipe 51 leading also from an air pressure tank 18. The upper end of the outlet pipe 32 is connected by an elbow 52.1toia pipe 5.3 leading to any suitable point of disposal.
The? operationtof the: modification ofe my` invention as shown in Figs. 7f and? 8 asabove describedris' as follows-z Thepacker. 2'Z being. positioned in the-well casing 25 immediately; above theuidlevel 54 (Fig. 7), air under pressure is allowed to be forced from the air pressure tank 181 through. the pipe 51,. elbow 50 and pipe 28 into thepackelt'to expand'the resilient sleeve 36 tightly against the-innerv side of the welll casing 25 to hold4 saidY packer iirmly in-` operative positionin said. casing. Air under pressure isv then; admitted: from` the air pressure tank 18 throughtthe. pipe 47,` elbow' 46. and .downwardly through pipe 29vv agaihstithe upper surfaceof level 54 of the oil in the well casing 25, below the packer Z7, which oil is forcedy downwardly and. through the inlets 42 into the receptacle 31, and said oil under pressure in said receptacle 31 is put under further pressure by air pressure fromV the air-pressure tank.18 through pipe 49, elbow 48, and pipe 30, whereupon the pressure of the oil in the receptacle. 31. raises the valve ball 4S above` its seat 44 and said' pressure forces. the oil from the receptacle upwardly through the: openzvalve* 33, outlet pipe 32, elbow 52. and-.pipe `53 to4 ai point.. of. disposal ofthe oil.
I claim A fluid pump comprising a well casing', a fluid outlet pipe leading. from the well. fluidv inl saidy casing, means having fluid connection. with the interior ofsaid well casingzfr applying: uid. under4 pressure downward tothe Ievelfof:wel1fuidinsaidzcasing to be pumped from said casing;4 a. valve:- mounted on the lower end. of said uid outlet; pipe comprisingA aV vertical tubular: valve casing havingapliiralityL of upper and lower peripherally spaced rectangularly shaped apertures attached to the lower portion of said outlet pipe, saidvvalve casing having interior integral shoulders adjacent the top and bottom thereof, an inner vertical tubular piston having a plurality of upper and lower rectangularly shaped apertures corresponding to said apertures in said casing and adapted to mate therewith slidably mounted in said valve casing, a spring in the upper part of said valve casing above said piston with the ends of said spring respectively bearing against said top integral shoulder in'l said valve casing, and against the top of said piston, said apertures in said inner piston and valve casing being normally out of alignment, said" inner, piston. moving upwardly' and aligning the corresponding upper and lower apertures in said inner piston andA valve casing to allow fluid to pass into said outlet pipe through said aligned apertures when the pressure of said uid is great enough to overcome the tension of said spring.
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