CN115405506A

CN115405506A - Double-acting oil well pump driven by submersible reciprocating driving device

Info

Publication number: CN115405506A
Application number: CN202211179156.1A
Authority: CN
Inventors: 郑小权; 刘建超; 周志强; 顾忠波; 刘伟
Original assignee: Xi'an Hongcheng Energy Technology Co ltd
Current assignee: Xi'an Hongcheng Energy Technology Co ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2022-11-29

Abstract

A double-acting oil-well pump driven by an oil-submersible reciprocating driver is characterized in that a rotor does reciprocating linear motion in a stator, the upper part of an upper plunger is provided with an upper oil pumping valve, the upper part of an isolation plunger is connected with the lower part of the upper plunger, a connecting hole is arranged at the connecting part of the isolation plunger and the upper plunger, the upper plunger is assembled in an upper pump cylinder, the lower part of the upper pump cylinder is provided with a discharge channel, the upper part of the upper pump cylinder is provided with an upper oil pumping valve, an outer cylinder is sleeved outside the upper pump cylinder, the lower part of the outer cylinder is connected with the lower part of the upper pump cylinder, a flow dividing joint is provided with a side inlet hole and a vertical flow channel, the lower part of the flow dividing joint is connected with the upper oil pumping valve and the outer cylinder, the isolation pump cylinder is connected with the lower part of the upper pump cylinder or the lower part of the upper pump cylinder, the lower part of the isolation plunger is sequentially connected with a lower oil pumping valve, a lower plunger, a liquid flow reciprocating hole is arranged between the lower oil pumping valve and the lower oil pumping valve, the lower pump cylinder is connected with the isolation pump cylinder, the lower part of the lower plunger is connected with the upper part of the rotor, the lower plunger, the lower pump cylinder is connected with the upper part of the lower pump cylinder, and a liquid inlet hole.

Description

Double-acting oil well pump driven by submersible reciprocating driving device

Technical Field

The invention relates to a device for mechanical oil extraction in an oil field, in particular to a double-acting oil well pump driven by an oil-submersible reciprocating driving device.

Background

In the pumping system with the rod pump, the pumping rod and the oil pipe move relatively in contact no matter in a vertical well or an inclined well, so that inevitable abrasion exists between the pumping rod and the oil pipe, particularly in a deep well and an inclined well, the pumping rod is easy to bend in the oil pipe, the problem that the pumping rod seriously abrades the oil pipe occurs, the oil pipe and the pumping rod cannot be used after abrasion occurs, oil well operation is caused, the maintenance-free period of an oil well is short, the operation cost is increased, the consumption of the rod pipe is increased, the production stop time of the oil well is long, and the yield of crude oil is reduced. In order to solve the above problems, technicians have developed various techniques for preventing abrasion between the sucker rod and the oil pipe. The technology for preventing the abrasion between the sucker rod and the oil pipe is a rodless oil pump, and the technology is to put a motor under the well to cancel the sucker rod, so that the problem of abrasion between the sucker rod and the oil pipe is fundamentally eliminated. One of the rodless oil-well pumps is a reciprocating oil-well pump driven by an oil-submersible reciprocating driving device. The oil well pump driven by the existing submersible reciprocating driving device is a common oil well pump, and the oil well pump discharges oil upwards and feeds oil downwards, the submersible reciprocating driving device outputs oil upwards, and the oil well pump is idle when the oil well pump goes downwards, so that the motor has poor working condition, high energy consumption and unbalanced operation. According to the problems of the oil-well pump driven by the existing submersible reciprocating driving device, the technical personnel researches out a solution, for example, chinese patent 2005200854450 balanced type downhole linear motor oil pumping device adopts a method of adding a counterweight under a downhole linear motor rotor, and the solution is solved by the method, which is in principle right, but is difficult to implement because the internal diameter of the oil well is generally 124mm (most of casings are of the specification, and 5 is of the specification) ¹ / ₂ in-tube), the balancing weight can only be made as a slender object, so that the balancing weight is a long rod body, and in order to prevent the balancing weight from falling off, the balancing weight needs to be arranged outside the balancing weightIf the anti-falling pipe is additionally arranged, if the counterweight falls off, the counterweight can fall into the anti-falling pipe, and the counterweight can be lifted out during workover operation, so that engineering accidents caused by falling to the bottom of a well are prevented. The upper part of the anti-drop pipe is connected with the lower part of the underground stator, so that the structure of the anti-drop pipe is more complicated. Since the weight of the balance weight reaches thousands of kg and the stroke thereof is greater than 1m, if the balance weight starts to fall at the upper starting point, a great impact force is generated, and therefore, even if the anti-fall pipe is provided, it is difficult to ensure that the anti-fall pipe is not broken. Therefore, the above patent techniques have a problem of difficulty in implementation.

The existing reciprocating oil well pump driven by the submersible reciprocating driving device has the problem of liquid drainage only in an upper stroke or a lower stroke, and the liquid drainage mode has the problems of less liquid production amount and non-maximized oil well benefit on one hand; on the other hand, the problem is that the upper and lower output powers of the submersible reciprocating driving device are different, so that the system is unbalanced in operation and high in energy consumption.

Disclosure of Invention

The invention aims to provide a double-acting oil-well pump driven by an oil-submersible reciprocating driving device which can realize large liquid production amount by overcoming the existing problems.

The purpose of the invention is realized by the following steps: a double-acting oil-well pump driven by an oil-submersible reciprocating drive device comprises a flow dividing joint, an upper pump oil inlet valve, an outer cylinder, an upper pump oil outlet valve, an upper pump cylinder, an upper plunger, an isolation pump cylinder, an isolation plunger, a lower pump oil outlet valve, a lower pump oil inlet valve, a lower pump cylinder, a lower plunger, a mover and a stator, wherein the mover makes reciprocating linear motion in the stator, the upper part of the upper plunger is provided with the upper pump oil outlet valve, the upper part of the isolation plunger is connected with the lower part of the upper plunger, a connecting through hole is arranged at the joint of the isolation plunger and the upper plunger, the upper plunger is assembled in the upper pump cylinder, the upper plunger is matched and sealed with the upper pump cylinder, the lower part of the upper pump cylinder is provided with a discharge channel, the upper part of the upper pump cylinder is provided with the upper pump oil inlet valve, the upper pump oil outlet valve is a one-way valve, well fluid can flow downwards from the upper parts of the upper pump oil inlet valve and the upper pump oil outlet valve and can not flow upwards from the lower parts of the upper pump oil inlet valve, the outer cylinder is sleeved outside the upper pump cylinder, an annular flow passage is formed between the outer cylinder and the upper pump cylinder, the lower part of the outer cylinder is connected with the lower part of the upper pump cylinder, the connection point is positioned below the discharge passage, the shunt joint is provided with a side inlet hole and a vertical flow passage, the lower inner part of the shunt joint is connected with the upper part of the upper pump oil inlet valve, the lower outer part of the shunt joint is connected with the upper part of the outer cylinder, well liquid can enter from the side inlet hole and flow into the upper pump cylinder through the upper pump oil inlet valve, the annular flow passage is communicated with the vertical flow passage, the upper part of the isolation pump cylinder is connected with the lower part of the outer cylinder after being sleeved outside the isolation plunger, the upper part of the isolation pump cylinder is connected with the lower part of the upper pump cylinder, the isolation plunger is matched and sealed with the isolation pump cylinder, the lower part of the isolation plunger is sequentially connected with the lower pump oil outlet valve, the lower pump oil inlet valve and the lower plunger, a liquid flow reciprocating hole is arranged below the lower pump oil outlet valve, the upper part of the lower pump cylinder sleeve device is connected with the lower part of the isolation pump cylinder after being outside the lower plunger, the lower pump barrel is matched and sealed with the lower plunger, the oil outlet valve of the lower pump and the oil inlet valve of the lower pump are one-way valves, well liquid can only flow upwards from the lower parts of the oil outlet valve of the lower pump and the oil inlet valve of the lower pump, the well liquid cannot flow downwards from the upper parts of the oil outlet valve of the lower pump and the oil inlet valve of the lower pump, the lower part of the lower plunger is connected with the upper part of the rotor, the lower part of the lower pump barrel is connected with the upper part of the stator, the lower part of the lower plunger is provided with an inner liquid inlet hole, and the lower part of the lower pump barrel is provided with an outer liquid inlet hole.

The beneficial effects of the invention are: the submersible reciprocating driving device needs to output power when going up and down, the system is balanced in operation, low in energy consumption, free of additional arrangement of a balance weight, and remarkable in economic benefit.

Drawings

Fig. 1 is an assembly drawing of the present invention.

Fig. 2 is a structural view of the tapping fitting of fig. 1.

In the figure: 1. the device comprises a flow dividing joint, 2, an upper pump oil inlet valve, 3, an outer cylinder, 4, an upper pump oil outlet valve, 5, an upper pump cylinder, 6, an upper plunger, 7, an isolation pump cylinder, 8, an isolation plunger, 9, a lower pump oil outlet valve, 10, a lower pump oil inlet valve, 11, a lower pump cylinder, 12, a lower plunger, 13-1, a rotor, 13-2 and a stator.

Detailed Description

The present invention will be further described with reference to the following examples and the accompanying drawings.

Referring to fig. 1 and 2, an embodiment of the present invention includes a flow dividing joint 1, an upper pump oil inlet valve 2, an outer cylinder 3, an upper pump oil outlet valve 4, an upper pump cylinder 5, an upper plunger 6, an isolation pump cylinder 7, an isolation plunger 8, a lower pump oil outlet valve 9, a lower pump oil inlet valve 10, a lower pump cylinder 11, a lower plunger 12, a mover 13-1, and a stator 13-2, wherein the mover 13-1 makes a reciprocating linear motion in the stator 13-2, the upper pump oil outlet valve 4 is installed on the upper portion of the upper plunger 6, the upper portion of the isolation plunger 8 is connected with the lower portion of the upper plunger 6, a communicating hole 6-1 is formed at the connecting portion of the isolation plunger 8 and the upper plunger 6, the upper plunger 6 is assembled in the upper pump cylinder 5, the upper plunger 6 is sealed with the upper pump cylinder 5 in a matching manner, a discharge passage 5-1 is formed at the lower portion of the upper pump cylinder 5, the upper pump oil inlet valve 2 is installed on the upper portion of the upper pump cylinder 5, the upper pump oil inlet valve 2 and the upper pump oil outlet valve 4 are one-way valves, the well fluid can flow downwards from the upper parts of the upper pump oil inlet valve 2 and the upper pump oil outlet valve 4 and cannot flow upwards from the lower parts of the upper pump oil inlet valve 4 and the upper pump oil inlet valve 2, the outer cylinder 3 is sleeved outside the upper pump cylinder 5, an annular flow channel 3-1 is formed between the outer cylinder 3 and the upper pump cylinder 5, the lower part of the outer cylinder 3 is connected with the lower part of the upper pump cylinder 5, the connection point is positioned below the discharge channel 5-1, the shunt joint 1 is provided with a side inlet hole 1-1 and a vertical flow channel 1-2, the lower inner part (1-4 in figure 2) of the shunt joint 1 is connected with the upper part of the upper pump oil inlet valve 2, the lower outer part (1-3 in figure 2) of the shunt joint 1 is connected with the upper part of the outer cylinder 3, the well fluid can enter from the side inlet hole 1-1 and flow into the upper pump oil inlet valve 2 and flow into the upper pump cylinder 5, the annular flow channel 3-1 is communicated with the vertical flow channel 1-2, the isolation pump barrel 7 is sleeved outside the isolation plunger 8, the upper part of the isolation pump barrel is connected with the lower part of the outer barrel 3, the upper part of the isolation pump barrel 7 or the lower part of the upper pump barrel 5 is connected, the isolation plunger 8 is matched and sealed with the isolation pump barrel 7, the lower part of the isolation plunger 8 is sequentially connected with the lower pump oil outlet valve 9, the lower pump oil inlet valve 10 and the lower plunger 12, a liquid flow reciprocating hole 10-1 is arranged below the lower pump oil outlet valve 9 and above the lower pump oil inlet valve 10, the lower pump barrel 11 is sleeved outside the lower plunger 12, the upper part of the lower pump barrel 11 is connected with the lower part of the isolation pump barrel 7, the lower pump barrel 11 is matched and sealed with the lower plunger 12, the lower pump oil outlet valve 9 and the lower pump oil inlet valve 10 are one-way valves, well liquid can only flow upwards from the lower parts of the lower pump oil outlet valve 9 and the lower pump oil inlet valve 10, the well liquid cannot flow downwards from the upper parts of the lower pump oil outlet valve 9 and the lower pump oil inlet valve 10, the lower part of the lower plunger 12 is connected with the upper part of the rotor 13-1, the lower plunger 12 can synchronously reciprocate with the rotor 13-1, the lower part of the lower pump barrel 11 is connected with the upper part of the stator 13-2, the lower part of the lower plunger 12 is provided with an inner liquid inlet hole 12-1, and the lower part of the lower pump barrel 11 is provided with an outer liquid inlet hole 11-1.

The rotor 13-1 is the output end of the submersible reciprocating driving device, and the stator 13-2 is the fixed part of the submersible reciprocating driving device.

In fig. 1, the upper pump oil inlet valve 2 and the upper pump oil outlet valve 4 are inverted pump valves, the valve seat sealing port is arranged above the valve ball, the valve ball is supported by a spring, and the valve seat sealing port can be changed to be arranged below the valve ball through flow channel design.

Pump diameter: the nominal diameter of a pump barrel is called as the pump diameter in the petroleum industry, namely the inner diameter of a working surface of the inner wall of the pump barrel.

The upper pump oil inlet valve 2, the upper pump oil outlet valve 4, the upper pump cylinder 5 and the upper plunger 6 form an upper pump, and the lower pump oil outlet valve 9, the lower pump oil inlet valve 10, the lower pump cylinder 11 and the lower plunger 12 form a lower pump. When the motor works, the stator 13-2 does not move, and the rotor 13-1 does reciprocating motion.

When the rotor 13-1 moves downwards, the lower pump oil inlet valve 10 is opened, the lower pump oil outlet valve 9 is closed, the lower pump discharges liquid (well liquid enters an annular space between the lower pump barrel 11 and the isolation plunger 8), the upper pump oil outlet valve 4 is closed, the upper pump oil inlet valve 2 is opened, and the upper pump feeds the liquid.

When the rotor 13-1 moves upwards, the lower pump oil inlet valve 10 is closed, the lower pump oil outlet valve 9 is opened, well liquid entering an annular space between the lower pump barrel 11 and the isolation plunger 8 flows away through an inner hole of the isolation plunger 8, the upper pump oil inlet valve 2 is closed, the upper pump oil outlet valve 4 is opened, and the well liquid entering the upper part of the upper pump is transferred to the position below the upper pump oil outlet valve 4.

When the oil pump goes down, the upper oil outlet valve 4 is closed, the lower end of the upper pump plunger 6 bears high pressure, and the submersible reciprocating driving device is required to do work, and when the oil pump goes up, the lower oil inlet valve 10 is closed, the upper end of the lower pump plunger 12 bears high pressure, and the submersible reciprocating driving device is required to do work. By optimizing and matching the diameters of the upper pump plunger 6, the isolating plunger 8 and the lower pump plunger 12, the displacement of the upper pump and the displacement of the lower pump are approximately equal, the upper stroke and the lower stroke work are approximately equal, the output power of the submersible reciprocating driving device is approximately equal, the purposes of balanced system operation, low energy consumption and no need of additionally installing a balance weight are achieved, and the operation efficiency of the system is greatly improved.

Two pumps pump oil, which is called double-acting oil pump in the oil industry.

Submersible, in the petroleum industry, refers to a motor and other parts which are positioned below a working fluid level in a well, namely a power part is submerged in a non-well fluid.

Claims

1. The utility model provides a oily reciprocating drive device of diving drives two effect oil-well pumps, including reposition of redundant personnel joint (1), go up pump inlet valve (2), urceolus (3), go up pump outlet fuel tap (4), go up pump barrel (5), go up plunger (6), keep apart pump barrel (7), keep apart plunger (8), pump outlet fuel tap (9) down, pump inlet valve (10) down, pump barrel (11) down, plunger (12) down, active cell (13-1), stator (13-2), active cell (13-1) are reciprocal linear motion in stator (13-2), characterized by: an upper pump oil outlet valve (4) is installed on the upper portion of an upper plunger (6), the upper portion of an isolation plunger (8) is connected with the lower portion of the upper plunger (6), a connecting through hole (6-1) is formed in the connecting portion of the isolation plunger (8) and the upper plunger (6), the upper plunger (6) is assembled in an upper pump cylinder (5), the upper plunger (6) and the upper pump cylinder (5) are sealed in a matched mode, a discharge channel (5-1) is formed in the lower portion of the upper pump cylinder (5), an upper pump oil inlet valve (2) is installed on the upper portion of the upper pump cylinder (5), the upper pump oil inlet valve (2) and the upper pump oil outlet valve (4) are one-way valves, well liquid can flow downwards from the upper portions of the upper pump oil inlet valve (2) and the upper pump oil outlet valve (4), the oil pump can not pump out the oil valve (4) from the upper part and flow upwards from the lower part of the oil inlet valve (2) of the upper pump, the outer cylinder (3) is sleeved outside the upper pump cylinder (5), an annular flow passage (3-1) is formed between the outer cylinder (3) and the upper pump cylinder (5), the lower part of the outer cylinder (3) is connected with the lower part of the upper pump cylinder (5), the connection point is positioned below the discharge passage (5-1), the shunt joint (1) is provided with a side inlet hole (1-1) and a vertical flow passage (1-2), the lower inner part of the shunt joint (1) is connected with the upper part of the oil inlet valve (2) of the upper pump, the lower outer part of the shunt joint (1) is connected with the upper part of the outer cylinder (3), well fluid can enter from the side inlet hole (1-1) and flow into the upper pump barrel (5) through the upper pump oil inlet valve (2), the circulation channel (3-1) is communicated with the vertical flow channel (1-2), the upper part of the isolation pump barrel (7) is connected with the lower part of the outer barrel (3) after being sleeved outside the isolation plunger (8), the upper part of the isolation pump barrel (7) or the lower part of the upper pump barrel (5) is connected, the isolation plunger (8) is matched and sealed with the isolation pump barrel (7), the lower part of the isolation plunger (8) is sequentially connected with the lower pump oil outlet valve (9), the lower pump oil inlet valve (10) and the lower plunger (12), a fluid flow reciprocating hole (10-1) is arranged below the lower pump oil outlet valve (9) above the lower pump oil inlet valve (10), the upper part of the lower pump barrel (11) is connected with the lower part of the isolation pump barrel (7) after being sleeved outside the lower plunger (12), the lower pump barrel (11) is matched and sealed with the lower plunger (12), the lower pump oil outlet valve (9) and the upper part of the lower pump oil outlet valve (10) is connected with the lower pump stator (13) and the upper part of the lower pump inlet valve (13) and the lower pump stator, the lower part of the lower plunger (12) is provided with an inner liquid inlet hole (12-1), and the lower part of the lower pump cylinder (11) is provided with an outer liquid inlet hole (11-1).