CN201292939Y - Oil well pump for reducing suspension point load of advanced water injection drive block - Google Patents

Abstract

The utility model provides an oil-well pump that is used for leading water injection drive block to reduce suspension point load suitable for deep well, including last piston (3), by-pass hole (4), well piston (5), lower piston (6), well through-hole (7), lower seal (8) etc, it is connected with last pump barrel (1) to go up seal (2), go up piston (3), well piston (5), lower piston (6) are in proper order in the body inserts upper seal (2) after linking gradually, pack into lower seal (8) in last pump barrel (1), it is connected with lower seal (8) to go up pump barrel (1), be equipped with respectively in lower piston (6) and move about valve bonnet (10), valve ball (11) that moves about, disk seat (12) moves about, can reduce the suspension point load of beam-pumping unit, improve the stress situation of sucker rod, be favorable to reducing the energy consumption, reduction in production cost. The utility model discloses the oil-well pump both can be applied to the vertical well, also can be applied to directional well, and the range of application is extensive.

Description

A kind of oil well pump used in advance water flooding block to reduce suspension point load

technical field

The utility model relates to an underground oil pump, in particular to an underground oil extraction device suitable for deep wells, which belongs to the category of oil extraction machinery. Specifically, it is an oil well pump used for reducing suspension point loads by leading water injection blocks.

Background technique

With the increasingly tense energy situation, a large number of deep-buried oil reservoirs have been more and more produced, and the depth of the oil well pump has been increasing; The suspension point load of the oil machine is getting bigger and bigger, and the strength requirement for the sucker rod is getting higher and higher. The increase in the load of the pumping unit, on the one hand, needs to be equipped with a high-power motor, which increases the consumption of electric energy and increases the production cost; Workover operations seriously affect the production efficiency of oil wells.

Contents of the invention

The purpose of this utility model is to provide a kind of oil well pump that is used for reducing the suspension point load of the advanced water injection drive block, the oil well pump can reduce the suspension point load of the pumping unit, thereby reducing the consumption of electric energy of the pumping unit and improving the force of the sucker rod condition and prolong the service life of the sucker rod.

The technical scheme that the utility model adopts is:

Including upper pump barrel, upper sealing body, upper piston, bypass hole, middle piston, lower piston, middle through hole, lower sealing body, reducing joint, floating valve cover, floating valve ball, floating valve seat, lower The pump barrel, fixed valve cover, fixed valve ball, fixed valve seat, the upper pump barrel and the lower pump barrel are connected through different diameter joints, the upper sealing body is connected with the upper pump barrel, and the upper piston, middle piston and lower piston are connected by threads in turn to form a Insert into the upper sealing body after being integrated, put the lower sealing body in the upper pump cylinder, and connect the upper pump cylinder and the lower sealing body. A floating valve cover, a floating valve ball and a floating valve seat are arranged in the lower piston respectively, a fixed valve cover is connected to the lower end of the lower pump cylinder, a fixed valve seat is connected to the lower end of the valve cover, and a fixed valve ball is arranged in the fixed valve seat.

A bypass hole is arranged on the upper pump barrel.

The lower end surface of the middle piston is provided with a middle through hole.

The utility model has the advantages that the suspension point load of the pumping unit can be reduced, the stress condition of the sucker rod can be improved, and the energy consumption and production cost can be reduced. The oil pump of the utility model can be applied to both vertical wells and directional wells, and has a wide application range.

Description of drawings

Accompanying drawing is the structural representation of the utility model.

Detailed ways

As shown in the accompanying drawings, the utility model is mainly composed of an upper pump cylinder 1, an upper sealing body 2, an upper piston 3, a bypass hole 4, a middle piston 5, a lower piston 6, a middle through hole 7, a lower sealing body 8, a different diameter Joint 9, floating valve cover 10, floating valve ball 11, floating valve seat 12, lower pump barrel 13, fixed valve cover 14, fixed valve ball 15, fixed valve seat 16 form. Its main feature is that the middle piston 5 separates the pump chamber between the upper sealing body 2 and the lower sealing body 8, and the upper and lower end faces of the middle piston 5 are in two different pressure systems: the upper and lower ends of the middle piston 5 The end surface communicates with the oil pipe and casing annular space through the bypass hole 4, making it in the pressure system of the oil pipe and casing annular space; the lower end surface of the middle piston 5 communicates with the oil pipe through the middle through hole 7, making it in the oil pipe in the pressure system. Because there is a difference between the oil pipe, casing annular space pressure and the oil pipe pressure, and this pressure difference acts on the upper and lower end faces of the middle piston 5 to generate an upward force, so that the suspension point load of the pumping unit is reduced. During the upstroke, the fixed valve ball 15 is opened, and the oil pump sucks crude oil from the well. The movable valve ball 11 is opened, and the crude oil below the piston is discharged above it by the movable valve ball 11.

The upper pump barrel 1 and the lower pump barrel 13 are threaded through the different diameter joint 9, the upper sealing body 2 is connected with the upper pump barrel 1 through threads, the upper piston 3, the middle piston 5, and the lower piston 6 are connected into one body through threads and then inserted into the upper pump barrel. In the sealing body 2, the lower sealing body 8 is installed in the upper pump barrel 1, and the upper pump barrel 1 and the lower sealing body 8 are connected by threads. A traveling valve cover 10, a traveling valve ball 11 and a traveling valve seat 12 are housed in the lower piston 6. Reducer joint 9 is connected with lower pump barrel 13 by thread, and lower end of lower pump barrel 13 is connected with fixed valve cover 14, and valve cover 14 lower end is connected with fixed valve seat 16, and fixed valve ball 15 is housed in fixed valve seat 16.

Claims (3)

1. An oil well pump for reducing suspension point loads by advanced water injection blocks, comprising an upper pump barrel (1), an upper sealing body (2), an upper piston (3), a bypass hole (4), a middle piston (5 ), the lower piston (6), the middle through hole (7), the lower sealing body (8), the reducing joint (9), the floating valve cover (10), the floating valve ball (11), the floating valve seat ( 12), the lower pump barrel (13), the fixed valve cover (14), the fixed valve ball (15), the fixed valve seat (16), it is characterized in that: the upper pump barrel (1) and the lower pump barrel (13) pass through different diameter joint (9), the upper sealing body (2) is connected with the upper pump cylinder (1), the upper piston (3), the middle piston (5), and the lower piston (6) are sequentially connected into one body and then inserted into the upper sealing body (2 ), the lower sealing body (8) is installed in the upper pump barrel (1), the upper pump barrel (1) is connected with the lower sealing body (8), and the floating valve cover (10) is respectively installed in the lower piston (6) ), the floating valve ball (11), the floating valve seat (12), the lower end of the lower pump barrel (13) is connected with a fixed valve cover (14), the lower end of the valve cover (14) is connected with a fixed valve seat (16), fixed Fixed valve ball (15) is housed in valve seat (16). 2. The oil well pump for reducing suspension point load by advanced water injection according to claim 1, characterized in that: the upper pump barrel (1) is provided with a bypass hole (4). 3. The oil well pump for reducing suspension point load by advanced water injection according to claim 1, characterized in that: the middle piston (5) is provided with a middle through hole (7) on the lower end surface.

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