US2624285A - Fluid-operated liquid pump - Google Patents

Description

Jan. 6, 1953 E. c. HALL 2,624,285

FLUID-OPERATED LIQUID PUMP Filed April 11, 1951 2 SHEETSSHE ET l 1752A? jj'g g p/semuce DISCHARGE Z4- POWER LINE I Z? 47 -ml 48 l 3 E? 38 32 no-roR PUHPING 42 23 26 I7 73 cnmam z y 74 I A? I l INVEN TOR.

Ell/S C. HALL A1 "fa/war Jan. 6, 1953 E. C. HALL FLUID- OPERATED LIQUID PUMP 2 SHEETS-SHEET 2 INVENTOR. 624/5 6' HALL Arm/M Patented Jan. 6, 1953 UNITED STATES ATENT OFFICE 2,624,285 FLUID-OPERATED LIQUID PUMP Ellis f. Hall, Jackson, 1Miss.', assignor jzto Development iGompany, Jackson, Miss.

JAimifieatifen pr-i1 ,11, 1951, 'SerialNo.122Q, l33 .2 iGlaims. (01. 103-46) in my prior'application. -'I- his-new-apparatu's*includes a novel arrangementof valves and ports therefor together Witha'pairofn VeI pistons'one of which acts to reciprocate a pump arm in a novel manner. A novel arrangement of'pipe and pipe connections is'provided-for{thevarious ports of the pump-actuatingapparatus. I

It is accordingly a'nob'je ctof the inventionto provide an apparatus of the character set forth which is comparatively simple in construction, easy to manufacture *and yet reflective and eflicient in use. v g

Another objector the inventionisthe provision in an apparatus of the character; -setforth, -0f novel means for theeummauonbr knocking? Another object of the invention is the provision, in an apparatus of thecharactersetforth, of novel valves and novel'- meansforioperating the same. I g i V 7 A further ohject-of-the invention is'the' provl sion of an apparatus of --the character set forth wherein packing is-rendered unnecessary.

Other and further-phje'cts of the invention will become-apparent from a reading of 'tth'e following specification takenin conjunct-ion-with-the drawings, inwhich: I 7 it Figure 1 is a iragmentaryvertical "sectional view, partly exploded, and-partly inelevation; of a pump-operating mechanism forming-apartpf the invention and showing the same m one positionwhi'ch it'may assume; t

"Figure 1A is a fragmentary vertical sectional view, partly in elevation, 6f"-a' pump-iorminga part of the invention and fshpwlljlgfthe sameas it would appear when connected with the apparatus shown in-Figure 1;

Figure 2 i is "a fragmentary vereeerseaiona view showing the apparatus illustrated :in Figures 1 andl-A butshow-ingjtheapparatus-therein in another position the' sa me may as'sume during the operation thereof;

Figure-3is an exploded'vertical sectional tiew,

:2 partly in-elevation, illustrating the manne'r in which the apparatus is positioned within a well casing, and u Figure 4 isan enlarged fragmentary vertical sectional view of aportion of the apparatus shown in Figure 1 but illustrating the sar'n'e in greater detail. I

Referring more particularly to the drawings, there is shown therein embedded in ground ID a well casing Il having adjacentit'shottom end a well packer 12 'upon which rests a cylindrical housing l3 for a pumping unit and pump such "as is illustrated, for example; in Figure 2 of the drawings.

Extending from the housing l3 u wardly 'thro'ugh thecasing H a bwer line M and a discharge lin'e 1 5 both-ofwhi'ch are-connected to a high pressure pump J6 on the surface of the ground which pump is operated by the shaft ll of a motor 1 8. The di'schar-ge line e-ha's tapped in thereto a discharge pipe 19 at the surface of the=ground. A check valve is placed in the dischargeline l5 -preferably at a point adjacent to the upper endotthe housing :13.

.[t is-to be under'stood that the housing 13 is provided with a suitable opening in its lower end for the admission thereinto of oil or Water as the case maybe. In the lower endof the housing 131 there ismountedya pump which is best illustrated in FigurelA andfwhich consists of an elongated hollow cylindrical casing-2| having a centrally disposed enlarged portion ,22. The casing 2| is closed at its bottom end, as indicatedat-Zt, and open at its upperend, as indicated at 24.. A verticallyand centrally located shaft .25 extends throughsthe 'pumpicas'ins 2i and is provided with 'a-fiangeZG atits lower end-andabumper 21 at its upper end. Substantially centrallyaiifixed to the f s a r i e a enistonzfl ho t r periphery is in conta'ct with the inner wall of'the enlarged portion 2 2.

A piston 29 is provided' in the lower .portion of the pump ca'singiill -and' is affixed to the shaft -25. The pist ifiis-prov ded i th a a r o ope ings 3B whichextenditherethrough. A circular valveS Lot flat material surrounds the shaft 25 below; the, piston i 9xan'd is normally held against the under side of the pistonjze by, a compression spring-32"which surrounds the shaft zj and bears against the flange lii and .the valve} l.

A- valve 33 is affixedtq the shaftjZ5 in the upper o o o "the, mp asin .andi i nt instructure with the valve ,29. -{Ihe Valve 33 is provided -with openir igs 34 which extend ver- 'ti'cally therethrough-anda valve 35 identical with with a bulkhead 39 which divides the same into a pair of compartments 40 and 4|, the compartment 4| being immediately above the pump and the compartment 49 being above the compartment 4|.

A hollow cylindrical piston is vertically reciprocable in the compartment 4| and is indicated at 42. This piston 42 is provided with a closed lower end 43. The shaft 25 extends slidably through the closed end 43 of the piston 42 and it will be apparent that the bumper 21 lies within the piston 42 and above the closed end 43 thereof.

A shaft 44 is vertically and centrally disposed in the compartment 4|] and has mounted thereon an upper piston 45 and a lowerpiston 46. Also mounted upon the shaft 44 in spaced relation to each other and to the pistons 45 and 46 are relatively smaller pistons 41 and 48 and it will be seen that the pistons 45, 46, 41 and 48 together with the shaft 44 will move reciprocally as a unit within the compartment 49.

The compartment 49 is provided with an upper port 49, a lower port 50 and five intermediate ports 52, 53, 54 and 55. It will also be seen that the pump casing 2| is provided with an upper port 56 and a lower port 51 while the compartment 4| is centrally provided with a series of five ports 58, 59, 60, 6| and 62.

The lower end of the power line I 4 is connected by a lateral pipe 63 with the port 62. It is also connected by a lateral pipe 64 with the port 58, by a lateral pipe 65 with the port 55 and alateral pipe 65 with the port 5|. The lower end of the discharge line I5 is connected by' a lateral pipe 61 with the port 69 and by means of a lateral pipe 68 with the port 53. The ports 50 and 6| are interconnected by means of a U-shaped pipe 69 and the ports 59 and 49 are connected by an elongated U-shaped pipe 10. The ports 52 and 51 are interconnected by means of an elongated U- shaped pipe 1| while the ports 54 and 56 are interconnected by means of an elongated U-shaped pipe 12.

The piston 42 is provided with a series of three spaced cutaway portions, as indicated at 13, 14 and 15, and the enlarged portion 22 of the pump casing 2| is provided with an upper inlet valve 16a and a lower inlet valve 11a. An annular indentation 15 is provided in the piston 42 adjacent the lower end thereof and a spring-pressed ball 11 is mounted in the wall of the extension 38 and is adapted to latch the piston 42 in its uppermost position such as is indicated in Figure 2 of the drawings by engaging in the groove 16.

In operation, beginning with the positions of the various pistons, etc. as shown in Figures 1 and 1A, when the motor I8 is operated it will cause the fluid pressure pump It to furnish fluid under pressure to the power line I4 and thence through lateral pipe 64 to the port 53, thence through the reduced portion 13 to the port 59 and thence through the U-shaped pipe to the port 49 where it will enter into the upper end of the chamber 40 to cause the pistons therein to move downwardly to a point Where the shaft 44 can no longer move in a downward position due to the same impingin against the bulkhead 39. Since in this position the ports 60 and GI are in communication through the reduced portion 14, fluid which has been in the lower end of the compartment 49 beneath the piston 46 will be discharged through the port 50 into the pipe 69 and hence by means of the lateral pipe 61 to eventually discharge into the discharge line i5 whereupon it will be forced past the valve 24 which will prevent its return in any event in a downward direction. It will then return sufflcient fluid to the pump It to insure the operation thereof and deliver any excess through. the discharge pipe l9.

When the pistons in the chamber 45 are in their downward position, as shown in Figure 1, some of the fluid under pressure in the power line l4 will pass through the lateral pipe 66 into the port 5| and thence-travel between the pistons 45 and 41 to the port 52 whence it will be led by means of the U-shaped pipe 1| to the port 51 in the lower end of the pump casing 2| thus causing the pistons 29, 28 and 33 to be lifted whereupon fluid will be drawn into the pump through the valves 11a from the interior of the well casing At the same time valve 16a will be forced to a closed position and the valve 35 will be opened by this action thus forcing fluid which is present in the pump casing 2| above the piston 28 to be forced through the port 56 into the U-shaped pipe 12 and thence into'the port 54 which is at this timein communication with the port 53 between the pistons 48 and 41. The fluid will thence be'delivered to the lateral pipe 68 and'finally to the discharge pipe l5 as aforesaid.

As the pistons 29, 28 and 33 rise the bumper 31 will eventually contact the underside of the closed end 43 of the piston 42 to thereby lift the same. This will cause the ports 59 and 60 to be in communication with each other through the reduced portion 14. It will also cause the ports El and 62 to be in communication with each other by means of the reduced portion 15. Hence pressure of fluid inthe power line l4 will now be applied through the U-shaped pipe 59 to the underside of the piston 46 to lift the shaft 44 and all of its attached pistons. This will cause fluid entrapped in the chamber 4|] above the piston 45 to pass through the port 49 into the U-shaped pipe 10 and through the port 59 to the port 60 utilizing the reduced portion 14 of the valve 42 for this purpose after which it will be delivered to the lateral pipe 61 and finally to the discharge line l5. Such action will, of course, permit the various pistons attached to the shaft to take their uppermost positions as shown in Figure 2, for example. Ports 52 and 53 will be connected together through the space between pistons 41 and 48 and ports 54 and 55 will now be connected together between the pistons 48 and 45 thus reversing the direction of travel of the pistons 33, 28 and 29. Thus it will be seen that fluid will continuously be forced in an upward direction through the discharge line [5 through the action as above described even though the pistons 33, 28 and 29 are reciprocating in the pump casing 2|. When the piston 42 is in its upward position it will be held there by the frictional engagement of the ball 11 in the groove 16 and it will be apparent that the device will be fully operative even though the shaft 44 and its pistons may e'ifa ifest- 'revolve upon 'their'longitudlnal sizes or if the pistons 42 should revolve upon its axis. It will likewise be seen that the apparatus is "capable of smooth, 990 31 1 Q iQQFJE Q 139W JQ fluid in both the power line 14 andthe discharge line I5 is a constant unidirectional flow.

The discharge line -lfi as shown in Figure '3 may "be eliminated *by stopping "this line above the check valve 20. This will let the fluid into the casing, which will act as a discharge line by having a well packer [2. By doing this one string of pipe in the well is eliminated. This arrangement can be used optionally.

While but one form of the invention has been shown and described herein, it will be readily apparent to those skilled in the art that many minor modifications may be made without departing from the spirit of the invention or the scope of the appended claims.

What is claimed is:

1. An apparatus of the character described comprising a well casing extending vertically into the ground, a cylindrical housing positioned in the lower portion of said well casing, a high pressure fluid pump mounted above ground, a fluid supply conduit extending from said high pressure fluid pump through said casing into said housing, a fluid return conduit extending from said high pressure fluid pump through said easing into said housing, a discharge pipe connected to said fluid return conduit, a reciprocally operated fluid pump in the lower end of said housing, and fluid pressure operated means mounted in said housing above said reciprocally operated fluid pump for actuating said reciprocally operated fluid pump, said means having connection with the fluid supply and fluid return conduits, and said means including a hollow cylindrical body having a centrally disposed bulkhead dividing the same into an upper and a lower compartment, a piston reciprocally mounted in said lower compartment, a vertical shaft in said upper compartment, a plurality of pistons affixed to the shaft in the upper compartment, said piston in the lower compartment having a plurality of reduced portions, said body having a plurality of ports extending to the upper compartment and a plurality of ports extending into the lower compartment, a pipe connecting on of the ports of the upper compartment with the fluid return conduit, a pipe connecting one of the ports of the upper compartment with the upper end of said reciprocal pump, a pipe connecting a port of the upper compartment with the lower end of said reciprocal pump, a pair of pipes connecting ports of the upper compartment with the fluid supply conduit, a pair of pipes connecting ports of the lower compartment with the fluid supply conduit, a pair of pipes each interconnecting a port of said upper compartment with a port in said lower compartment, said pistons in the upper compartment acting as valves to interiorly and selectively interconnect pairs of ports of said upper compartment, and said reduced portions in said piston in the lower compartment actin as valves to selectively and interiorly interconnect pairs of ports of said lower compartment, and means connected with said piston in the lower compartment for actuating the reciprocal pump, and said reciprocally operated fluid pump including a vertically extending cylindrical pump housing having an enlarged cylindrical portion, a centrally disposed shaft in said pump housing, a piston affixed to said shaft in the upper portion l 6 of said pump housing, 'afpislltonfafii'xed to said shaft ,in the lower portion "of :s ing, a relatively iargerfpiston shaft in said enlarged central p6 ion, an inlet valve in the upperr'enfdbf'saide la ears-awn, an inlet valve-in'the lower e 4 portion, an upwardly openinghe gay v'alve for the uppermost piston, {a downwardly -"opening one-way valve for the lowermost pis'ton, and fluid :lines interconnecting "the upper and lower ends of said pump housing wit h said ilu'id pres- 'sure operated means. 7 i

2. An apparatus of the character described comprising a well casing extending vertically into the ground, a cylindrical housing positioned in the lower portion of said well casing, a high pressure fluid pump mounted above ground, a fluid supply conduit extending from said high pressure fluid pump through said casing into said housing, a fluid return conduit extending from said high pressure fluid pump through said easing into said housing, a discharge pipe connected to said fluid return conduit, a reciprocally operated fluid pump in the lower end of said housing, and fluid pressure operated means mounted in said housing above said reciprocally operated fluid pump for actuating said reciprocally operated fluid pump, said means having connection with the fluid supply and fluid return conduits, and said means including a hollow cylindrical body having a centrally disposed bulkhead dividing the same into an upper and a lower compartment, a piston reciprocally mounted in said lower compartment, a vertical shaft in said upper compartment, a plurality of pistons aflixed to the shaft in the upper compartment, said piston in the lower compartment having a plurality of reduced portions, said body having a plurality of ports extending to the upper compartment and a plurality of ports extending into the lower compartment, a pipe connecting one of the ports of the upper compartment with the fluid return conduit, a pipe connecting one of the ports of the upper compartment with the upper end of said reciprocal pump, a pipe connecting a port of the upper compartment with the lower end of said reciprocal pump, a pair of pipes connecting ports of the upper compartment with the fluid supply conduit, a pair of pipes connecting ports of the lower compartment with the fluid supply conduit, a pair of pipes each interconnecting a port of said upper compartment with a port in said lower compartment, said pistons in the upper compartment acting as valves to interiorly and selectively interconnect pairs of ports in said upper compartment, and said reduced portions in said piston in the lower compartment acting as valves to selectively and interiorly interconnect pairs of ports of said lower compartment, and means connected with said piston in the lower compartment for actuating the reciprocal pump, and said reciprocally operated fluid pump including a vertically extending cylindrical pump housing having an enlarged cylindrical portion, a centrally disposed shaft in said pump housing, a piston aflixed to said shaft in the upper portion of said pump housing, a piston aflixed to said shaft in the lower portion of said pump housing, a relatively larger piston affixed to said shaft in said enlarged central portion, an inlet valve in the upper end of said enlarged portion, an inlet valve in the lower end of said enlarged portion, an upwardly opening one-way valve for the uppermost piston, a downwardly 7 7 opening one-way valve for the lowermost piston, REFERENCES CITED and mud fines interconnectmg the upper and The following references are of record in the lower end of said pump housing with said fluid me of this patent: pressure operated means, said last-mentioned 1 means including a closed bottom for the piston 5 UNITED STATES PATENTS in the lower chamber, said bottom having an Number Name Date opening for slidably receiving therethrough the 1,857,405 Scott et a1 May 10, 1932 upper end of the shaft of said reciprocal pump, 2. 2,245,501 Richardson June 10, 1941 bumper afiixed to the upper end of said pump 7 1 shaft within the piston in said lower chamber, 10

and a bumper amxed to the pump shaft below said bottom and in spaced relation to the firstmentioned bumper. V ELLIS C. HALL.

Images