US2464347A - Deep well pump - Google Patents

Description

March 15, 1949. L. ROOFE DEEP WELL PUMP 2 Sheets-Sheet 1 Filed March 30, 1945 Arr'omsi's E. L. ROOF E 1 DEEP WELL PUMP March 15, 1949.

2 Sheets-Sheet 2 Filed March 30, 1945 ELMER L. ROOFE I J retestedmission,

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Application March 30, 1945, Serial No. 585,743 6 Claims. (Cl. 103-155) 1 This invention relates to a pump and more particularly to a pump which may be easily installed and which is capable of efficient operation particularly in deep wells such as oil and gas wells.

The primary object or the invention is to provide a simplified pump which is less expensive to manufacture, install, and operate than existing types of pumps.

Another object is to provide a pump structure comprising a minimum number of parts of simplifled design.

A further object is to provide a pump comprising an assembly which is made an integral part of the flow string, and which includes plunger packing into which the pump plunger may be lowered from the surface.

A still further object'is to provide a pump in which the chevron type of packing may be utilized, means being provided to assure a fluidseal between adjacent surfaces.

The objects and advantages just indicated. together with other objects and advantages will be more fully apparent from the following description considered in connection with the accompanying drawings in which:

Fig. 1' is an elevational view partly in section showing one embodiment of the invention;

Fig. 2 is a sectional view taken on line 22 in Fig. 1; I

Figs. 3 and 4 are elevational views partly in section showing a still further embodiment of the invention.

In the embodiment of the invention as shown in Fig. 1, the tubing or flow string I has attached thereto a special coupling assembly 2 from which the barrel 3 extends downwardly. The barrel 3 is closed at its lower end by the standing valve assembly 4 which is provided with a strainer 5 to minimize the entry of solids to the pump and the flow string there above.

The coupling assembly 2 comprises a coupling l0 threaded at H and I2 for interconnection with the flow string l and the barrel 3 respectively. Proximate its lower end the coupling is provided with an inwardly extending flange l3.

A plurality of passages IS in the flange is extend upwardly and outwardly to meet with axially extending passages IS in a sleeve [1 fitting within the coupling 2. At their upper ends these passages terminate in seats l8 for ball valves l9 whereby valving of these passages is effected to serve a purpose that will be more fully apparent.

A packing seating ring or bushing 20 surmounts the inner portion of the flange I: and fits closely engage the uppermost of the packing rings.

The ring 23 has a plurality of counterbores 25 which overlie the upper ends of the passages Itand which serve as cages for the ball valves l9. Fluid exits from these cages are provided by passages 26 which extend divergingly upward to the upper surface of the ring. Radially extending recesses 21 at one or more of the counterbores 25 provide a passage whereby fluid pressure from above the respective valves it may be admitted to the peripheral edges of the packing rings 22.

The sleeve I'I, seating ring 20. and the retaining ring 23 are held in position by the holddown ring 30 threadedly connected to the interior of the coupling 2. The inner surface of this holddown ring 30 is tapered at 3| so that the bearing surface at the lower end therefor, engages the hold-down ring 30 in an annular area outwardly of the openings 28. This feature of construction provides an overhang which restrains solids from moving downwardly and collecting upon and clogging the openings 26.

The pump plunger 35 is of any suitable length and weight, and is lowered into position by suitable means such as the conventional sucker rod (not shown). The lower end of the plunger is tapered at 36 so that it will be guided intothe hold-down ring 30 and thence move slidably within the packing rings 22 whereupon the pump is compietelyassembled and is ready for operation. The operation of the pump above described and embodying the invention comprehends reciprocation of the plunger 35 throughout a desirable range. The upward movement of the plunger will cause well fluids to enter the barrel 3 by way of the standing valve 4 and the strainer 5, inasmuch as these valves I9 are held upon their seats I! by gravity and the pressure exerted by superposed fluid.

The succeeding downward movement of the plunger 35 displaces fluid within the barrel 3, such displaced fluid moving along the path indicated by the arrow 31 and thence upwardly through the valves I9 and into the flow string I along the general path indicated by the arrow 33. Attention is directed to the fact that the design of the pump structure is such that fluids moving from within the openings 28 in the hold-down ring 23 are sufiiciently turbulent that sedimentation upon the hold-down ring 23 or the small annular space between the hold-down ring and the plunger 33, is minimized. This feature reduces the rate at which normal wear takes place on either the plunger or the The embodiment shown in Fig. 3 differs from that above described in. that the plunger 35' is hollow and is provided with a traveling valve 50 therein. Like parts of this embodiment are indicated by like reference characters. The provision of the traveling valve 40 obviates the provision of valves l9 and associated elements. Accordingly, the coupling ill of the assembly 2' is of slightly difierent construction, the inwardly extending flange l3 being of a width suflicient only to receive the packing seating ring. 20' .upon which the packing rings 22' are mounted.

The packing rings 22' and the packing seating ring 20' are held in place by means of a holddown ring 23 which is threaded directly to the interior of the coupling Hi. This hold-down ring is likewise provided with one :or more passages 2l' so that pressure fluid withinthe flow string i is admitted to both the inner and the outer peripheries of the packing rings 22'.

The embodiment of the invention as shown in Fig. 4 is the same as that shown in Fig. 3 except that the plunger 35" is provided with one or more radial openings M above the coupling Ill, so that pump fluids may enter the flow string I for travel to the surface. This embodiment permits the use of the conventional sucker rod whereas that shown in Fig. 3 requires a reciprocating string which serves as a flow string.

Broadly the invention comprehends a pump of simple design and comprising a minimum number of parts, such pump being particularly adaptable for use in deep wells such as oil .wells.

What is claimed is:

1. In a pump, a tubular member having an internal shoulder, a barrel extending downwardly from the member, a plunger extending through said member and into said barrel, packing within said member above said shoulder and about said plunger, and clamp means holding said packing in position, said means being arranged to admit fluid to the inner and outer sealing surfaces of said packing to effectuate a seal between the member and the plunger passing therethrough.

2. A pump assembly comprising, a standing valve, a pump barrel extending upwardly therefrom, a coupling attached to said barrel and extending upwardly therefrom, said coupling hav Q said coupling bearing upon the packing rings, there being a passage to admit fluid to the outer periphery of the packing rings.

3. A pump comprising. a standing valve, a barrel extending upwardly therefrom, a coupling member attached to the upper end of the barrel, an inwardly extending flange in said member, packing rings above said flange, a plurality of passages extending from a point below to a point above said packing rings, valving means for each of said passages, and a reciprocable displacement plunger sealably passing through the packing.

4. A pump comprising a standing valve, a barrel extending upwardly therefrom, a reciprocable plunger extending into said barrel, said plunger having a smooth peripheral surface thereon, means forming an outlet for fluid displaced by downward movement by the plunger into the barrel, a coupling surrounding said plunger and connected to said barrel, packing within said coupling and forming a seal between the coupling and the plunger, a hold-down ring for said packing, and means for admitting fluid pressure to the peripheral contact surface. of the packing with the coupling.

5. A pump comprising. a standing valve, a barrel extending upwardly therefrom, a coupling member attached to the upper end of the barrel, an upwardly facing shoulder in said coupling member, packing rings above said shoulder,-

i0 pling member thereabout, an upwardly facing ing an inwardly extending shoulder, a plurality m of packing rings of the chevron type seated upon shoulder in said member, a sleeve fitting within the coupling above said shoulder, longitudinal passages in the walls of said sleeve, valves in said passages operative to admit fluid upwardly therethrough, said passages communicating at their upper and lower ends with the interior of the coupling, and packing rings within said sleeve to form a seal with the plunger reciprocable therein.

EIMIER. L. ROOFE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED. STATES PATENTS Number Name Date I 1,436,881 Kerr Nov. 28, 1922 1,699,036 Welsh Jan. 15, 1929 2,133,655 Brotzman et al Oct. 18, 1938

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