CN205744379U - A kind of multifunctional oil-well pump - Google Patents

Abstract

The utility model discloses a multifunctional oil well pump, which comprises a pump cylinder joint, a pump cylinder, a plunger assembly and a fixed valve assembly; the plunger assembly has a plunger, and the upper end of the plunger is connected with an oil outlet valve cover , The lower end is connected with a downstream downstream valve, the downstream downstream valve includes a downstream downstream valve seat, a downstream downstream valve ball and a lower joint, the downstream downstream valve is threadedly connected with the lower end of the plunger by its downstream downstream valve seat, and the plunger assembly also includes a A pull rod with external threads at both ends, which passes through the oil outlet valve cover, plunger, and downstream downstream valve seat in sequence and is threadedly connected with the downstream downstream valve ball and the lower joint. The upper end of the pull rod of the plunger assembly The thread is screwed with an upper joint. The downstream moving valve of the plunger assembly in the utility model is opened and closed mechanically by the pull rod driven by the sucker rod. During the downstroke, the sucker rod drives the pull rod to move down, pushes the plunger downward, and opens the valve forcibly, thereby achieving the gas-proof function. Effect. The pull rod of the plunger assembly is connected to the plunger in a floating manner and can rotate relative to each other, so that the wear of the plunger is uniform and the wear resistance is improved.

Description

A multifunctional oil well pump

technical field

The utility model relates to a multifunctional oil pump.

Background technique

As oil exploitation enters the middle and later stages, the conditions of oil wells are becoming more and more complex and harsh. In sand pumping wells, sand particles will wear the plunger and pump barrel, resulting in a decrease in pump efficiency, a reduction in the life of the oil well pump, and sand jams in severe cases. For oil wells with a large oil-gas ratio, the degree of oil filling is poor, the pump efficiency is low, and sometimes air locks occur, so that the oil well pump cannot work normally. For inclined wells, there will be a lag in the closing of the valve ball, which will also increase the friction between the plunger and the pump barrel, making the plunger unable to move.

For the mechanical production wells in the above-mentioned complex blocks, failures such as sand sticking and gas lock often occur when conventional oil well pumps are used for production. At the same time, due to the influence of well deviation, valves are not closed in time, reducing pump efficiency, affecting production, and increasing oil production costs.

Utility model content

The purpose of this utility model is to overcome above-mentioned shortcoming, provide a kind of multifunctional oil well pump.

In order to solve the above technical problems, the utility model provides a multifunctional oil well pump, which includes a pump barrel joint, a pump barrel, a plunger assembly placed in the pump barrel and a fixed valve assembly installed at the lower end of the pump barrel; the plunger assembly It has a plunger, the upper end of the plunger is connected with the oil outlet valve cover, and the lower end is connected with the downstream downstream valve. The downstream downstream valve includes the downstream downstream valve seat, the downstream downstream valve ball and the lower joint. The downstream downstream valve is connected with the downstream downstream valve seat The lower end of the plunger is threaded; the fixed valve assembly includes an oil inlet valve cover. The valve ball, the inner wall of the oil inlet valve cover has a fixed valve seat, and the plunger assembly also includes a pull rod with external threads at both ends, and the pull rod passes through the oil outlet valve cover, plunger, and downstream in turn. The valve seat is also threadedly connected with the downstream moving valve ball and the lower joint, and the upper end of the pull rod of the plunger assembly is screwed with an upper joint.

In the multifunctional oil well pump with the above structure, the downstream traveling valve of the plunger assembly is mechanically opened and closed by the pull rod driven by the sucker rod, which changes the way that the oil outlet valve of the traditional oil well pump is opened and closed by the liquid pressure in the pump. During the upstroke, the sucker rod drives the pull rod to move up, the downstream traveling valve is closed, and the oil on the upper part of the plunger is lifted to the ground, and at the same time, the pump chamber at the lower part of the plunger is filled with oil; during the downstroke, the sucker rod drives the pull rod to move down, Push the plunger down to open the valve forcibly, and the oil-air mixture in the lower chamber of the pump can smoothly pass through the plunger and enter the oil pipe, thereby achieving the effect of preventing gas. In addition, the pull rod of the plunger assembly is connected to the plunger in a floating manner and can rotate relative to each other, so that the wear of the plunger is uniform and the wear resistance is improved.

As an improvement of the utility model, the upper joint and the lower joint are screw joints. The spiral flow is generated after the liquid flow in the upper and lower strokes passes through the upper and lower screw joints, which improves the ability of the entire liquid flow to carry sand and facilitates the sand to be discharged out of the pump along the spiral groove of the screw joint.

As a further improvement of the utility model, the plunger assembly is composed of the first plunger assembly, the second plunger assembly and the third plunger assembly, and the third plunger assembly, the second plunger assembly The plug assembly is threadedly connected with the lower joint of the first section plunger assembly with the upper end thread of its pull rod, and the third section plunger assembly is threaded with the lower joint thread of the second section plunger assembly with the upper end thread of its pull rod. The use of a three-stage plunger assembly can solve the problem that the plunger cannot move due to the increased friction caused by the well deviation.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Fig. 1 is a schematic cross-sectional structure diagram of a multifunctional oil well pump of the present invention.

Fig. 2 is a schematic cross-sectional structure diagram of a plunger assembly in a multifunctional oil well pump of the present invention.

Fig. 3 is a schematic diagram of the overall structure of a plunger assembly composed of three sections in a multifunctional oil well pump of the present invention, wherein the uppermost plunger assembly is connected with an upper joint.

FIG. 4 is an enlarged schematic diagram of the structure at I in FIG. 2 .

Fig. 5 is a schematic cross-sectional structure diagram of a fixed valve assembly in a multifunctional oil well pump of the present invention.

detailed description

Referring to Fig. 1-Fig. 5, the utility model is a multifunctional oil well pump, which includes a pump barrel joint 1, a pump barrel 2, a plunger assembly 3 placed in the pump barrel and a fixed valve assembly 4 installed at the lower end of the pump barrel; The plunger assembly 3 has a plunger 31. The upper end of the plunger is connected with an oil outlet valve cover 32, and the lower end is connected with a downstream downstream valve 33. The downstream downstream valve 33 includes a downstream downstream valve seat 331, a downstream downstream valve ball 332 and a lower downstream valve. joint 333, the downstream traveling valve 33 is threadedly connected with the lower end of the plunger 31 by its downstream traveling valve seat 331; There is an oil outlet joint 43, the lower end of which is connected with a fixed valve lower joint 44, the oil inlet valve cover 41 has a fixed valve ball 45, the inner wall of the oil inlet valve cover 41 has a fixed valve seat 46, and the plunger assembly 3 also includes a A pull rod 34 with external threads at both ends, the pull rod 34 passes through the oil outlet valve cover 32, the plunger 31, and the downstream downstream valve seat 331 in sequence and is threadedly connected with the downstream downstream valve ball 332 and the lower joint 333, The upper end of the pull rod 34 of the plunger assembly 3 is screwed with an upper joint 9 . The upper joint 9 and the lower joint 333 are preferably screw joints. The plunger assembly 3 is composed of a first plunger assembly 301, a second plunger assembly 302 and a third plunger assembly 303. The second plunger assembly 302 The upper end thread of its pull rod is threaded with the lower joint of the first section plunger assembly 301, and the third section plunger assembly 303 is threaded with the lower joint of the second section plunger assembly 302 with the upper end thread of its pull rod. A sharp corner 310 is formed at the top of the plunger 31 . A cylindrical boss 47 is formed in the oil outlet joint 43 of the fixed valve assembly 4, and a return spring 48 is sleeved on the cylindrical boss 47, and the other end of the return spring 49 is connected with the fixed valve ball 45. Push up to the push rod 49 of the fixed valve seat 46 .

Claims (5)

1. A multifunctional oil well pump, including a pump barrel joint (1), a pump barrel (2), a plunger assembly (3) placed in the pump barrel, and a fixed valve assembly (4) installed at the lower end of the pump barrel; The plunger assembly (3) has a plunger (31). The upper end of the plunger is connected with an oil outlet valve cover (32), and the lower end is connected with a downstream downstream valve (33). The downstream downstream valve (33) includes a downstream downstream valve Seat (331), downstream floating valve ball (332) and lower joint (333), the downstream floating valve (33) is threadedly connected with the lower end of the plunger (31) by its downstream floating valve seat (331); the fixed valve The assembly (4) includes the oil inlet valve cover (41). The upper end of the oil inlet valve cover (41) is connected to the oil outlet joint (43) through the connecting pipe (42), and the lower end is connected to the fixed valve lower joint (44). There is a fixed valve ball (45) inside the oil valve cover (41), and a fixed valve seat (46) is provided on the inner wall of the oil inlet valve cover (41). It is characterized in that: the plunger assembly (3) also includes a two There is a pull rod (34) with an external thread at the end, and the pull rod (34) passes through the oil outlet valve cover (32), the plunger (31), and the downstream downstream valve seat (331) in sequence and connects with the downstream downstream valve ball (332) is threadedly connected with lower joint (333), and the pull rod (34) upper end thread of plunger assembly (3) is screwed with upper joint (9). 2. The multifunctional oil well pump according to claim 1, characterized in that: the upper joint (9) and the lower joint (333) are screw joints. 3. The multifunctional oil well pump according to claim 1, characterized in that: the plunger assembly (3) consists of a first plunger assembly (301), a second plunger assembly (302) and The third plunger assembly (303) consists of three plunger assemblies, and the second plunger assembly (302) is threadedly connected with the lower joint of the first plunger assembly (301) by the upper end thread of the pull rod , the third section of the plunger assembly (303) is threadedly connected with the lower joint of the second section of the plunger assembly (302) by means of the upper end thread of the pull rod. 4. The multifunctional oil well pump according to claim 1, characterized in that: a sharp corner (310) is formed at the top of the plunger (31). 5. The multifunctional oil well pump according to claim 1, characterized in that: a cylindrical boss (47) is formed in the oil outlet joint (43) of the fixed valve assembly (4), and the cylindrical boss ( 47) A return spring (48) is set on the upper sleeve, and the other end of the return spring (48) is connected with a push rod (49) that can push the fixed valve ball (45) to the fixed valve seat (46).