CN208073442U - A kind of composite oil pumping device of linear dynamo oil pump and electric submersible pump concatenation - Google Patents

Abstract

The utility model includes an electric submersible pump, an oil storage pipe, and a linear motor oil well pump, and is specifically composed of an electric submersible pump, a joint, an oil pipe, an oil storage pipe, a casing, a sealing cover, a cable, a pressure sensor, a sealing ring, an oil outlet valve, a pump barrel, It consists of oil inlet valve, plunger, motor shaft, sealing box, motor uprighting anchor, motor casing, conduit, magnet, mover, and conduit uprighting anchor. The oil storage pipe is divided into two chambers, the electric submersible pump is installed in the upper chamber of the oil storage pipe, and the linear motor oil pump is installed in the lower chamber of the oil storage pipe. A pressure sensor is used to detect the amount of oil in the upper cavity of the oil storage pipe. When the oil amount reaches the oil pumping threshold, the linear motor oil pump stops working, and the electric submersible pump starts to work, pumping the oil from the oil storage pipe to the ground until the oil is stored. When the amount of oil in the oil pipe is lower than the oil inlet threshold, the electric submersible pump stops working, and the linear motor oil well pump starts to work, pumping oil into the oil storage pipe for storage. The core of the utility model is to utilize an electric submersible pump, an oil storage pipe, and a linear motor oil pump to carry out intermittent oil pumping for oil storage.

Description

A composite oil pumping device in which a linear motor oil well pump and an electric submersible pump are connected in series

technical field

The utility model belongs to the field of oil production engineering, in particular to a composite oil pumping device in which a linear motor oil pump and an electric submersible pump are connected in series.

Background technique

With the continuous development of oil and gas fields, the pressure of oil reservoirs continues to decrease, and the difficulty of oil lifting continues to increase. Oil wells gradually transition from self-flowing wells to mechanical pumping wells. Mechanical pumping wells are generally divided into rod pumping and rodless pumping. At present, the most widely used is the rod pumping system. In some blocks, the reservoir pressure is low and the oil seepage velocity is slow, and the sucking phenomenon often occurs when the rod pumping system is used, resulting in low pumping efficiency. In this case, intermittent rodless pumping is the most economical and energy-saving way. However, due to the low reservoir pressure and less oil in the casing, the common intermittent rodless pumping requires frequent start-up and shutdown, which causes great damage to the motor and consumes a lot of energy. To solve this problem, one solution is to use a low-power oil well pump to store the oil in the reservoir in a certain container downhole, and when the oil storage container is full, use a high-power oil well pump to drain the oil. Pump to the surface. At present, no scholars have designed corresponding oil recovery devices based on this oil recovery scheme.

Contents of the invention

For low-yield oil wells, in order to improve oil pumping efficiency, save energy and reduce consumption, the utility model discloses a composite oil pumping device in which a linear motor oil pump and an electric submersible pump are connected in series.

The technical scheme adopted in the utility model is:

The system consists of electric submersible pump, oil storage pipe, linear motor oil well pump, including electric submersible pump, joint, oil pipe, oil storage pipe, casing, sealing cover, cable, pressure sensor, sealing ring, oil outlet valve, pump barrel, inlet Oil valve, plunger, motor shaft, sealing box, motor uprighting anchor, motor housing, conduit, magnet, mover, conduit uprighting anchor. The oil storage pipe is divided into two chambers, the electric submersible pump is installed in the upper chamber of the oil storage pipe, and the linear motor oil well pump is installed in the lower chamber of the oil storage pipe. The electric submersible pump is installed at the bottom of the oil pipe, the lower end of the joint is connected with the upper end of the electric submersible pump, and the upper end of the joint is connected with the lower end of the oil pipe. The oil storage pipe is fixed at the lower part of the oil pipe with a sealing cover, the conduit is fixed at the lower end of the oil storage pipe by the conduit righting anchor, the motor casing is fixed in the conduit by the motor upright anchor, and an oil channel is opened on the motor righting anchor. The magnet is fixed in the motor casing, the mover is fixed on the motor shaft, and the sealing box is installed between the motor casing and the motor shaft. The upper end of the motor shaft is connected to the plunger, and the oil inlet valve is installed on the plunger, and the plunger is located in the pump barrel; the lower end of the pump barrel is fixed to the upper end of the conduit, and the upper end of the pump barrel is connected to the inner wall of the oil storage pipe. The sealing ring is installed between the pump barrel and the oil storage pipe, the oil outlet valve is installed on the upper part of the pump barrel, and the oil outlet valve is a fixed valve. The cable penetrates through the annulus of the oil pipe and casing, passes through the sealing cover and connects with the electric submersible pump, and then passes down through the pump barrel, sealing ring, and conduit to connect with the linear motor. The motor shaft reciprocates up and down in the conduit. When the motor shaft moves downward, the oil outlet valve is closed and the oil inlet valve is opened. Enter the pump barrel; when the motor shaft moves upward, the oil inlet valve is closed, the oil outlet valve is opened, and the oil in the pump barrel is pumped to the upper chamber of the oil storage pipe through the oil outlet valve. The pressure sensor is used to detect the amount of oil in the upper chamber of the oil storage pipe. When the oil amount reaches the oil pumping threshold, the linear motor oil well pump stops working, and the electric submersible pump starts to work, pumping the oil from the oil storage pipe to the ground. Until the amount of oil in the oil storage pipe is lower than the oil inlet threshold, the electric submersible pump stops working, and the linear motor oil well pump starts to work, pumping the oil into the oil storage pipe for storage, and reciprocating in this way for intermittent oil pumping. The core of the utility model is to use an electric submersible pump, an oil storage pipe, and a linear motor oil pump to form a composite oil pumping system for intermittent oil pumping.

Compared with the existing oil pumping system, the utility model has the following advantages:

1. Using electric submersible pumps, oil storage pipes, and linear motor oil pumps to form a composite oil pumping system for intermittent oil pumping, avoiding the phenomenon of empty pumping of electric submersible pumps, improving oil pumping efficiency, energy saving and efficiency enhancement, especially suitable for low production wells.

2. The linear motor oil well pump works intermittently. During the stop phase, it can ensure the full seepage of the oil, effectively protect the oil reservoir and improve the recovery rate of the oil reservoir.

3. The electric submersible pump always maintains a high degree of fullness when it is working, the working environment is good, and the service life is long.

Description of drawings

Fig. 1 is a structural schematic diagram of a composite oil pumping device in which a linear motor oil well pump and an electric submersible pump are connected in series according to the present invention.

In the figure: 1. Electric submersible pump, 2. Joint, 3. Oil pipe, 4. Oil storage pipe, 5. Casing, 6. Sealing cover, 7. Cable, 8. Pressure sensor, 9. Sealing ring, 10. Oil outlet Valve, 11. Pump barrel, 12. Oil inlet valve, 13. Plunger, 14. Motor shaft, 15. Seal box, 16. Motor righting anchor, 17. Motor casing, 18. Conduit, 19. Magnet, 20. Mover, 21. Conduit righting anchor.

Detailed ways

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

As shown in Figure 1, the utility model is a composite oil pumping device in which a linear motor oil pump and an electric submersible pump are connected in series. Oil pipe 3, oil storage pipe 4, sleeve pipe 5, sealing cover 6, cable 7, pressure sensor 8, sealing ring 9, oil outlet valve 10, pump barrel 11, oil inlet valve 12, plunger 13, motor shaft 14, sealing box 15. The motor righting anchor 16, the motor housing 17, the conduit 18, the magnet 19, the mover 20, and the conduit righting anchor 21 are composed.

The electric submersible pump 1 is installed at the bottom of the oil pipe 3 , the lower end of the joint 2 is connected with the upper end of the electric submersible pump 1 , and the upper end of the joint 2 is connected with the lower end of the oil pipe 3 . The oil storage pipe 4 is fixed on the lower part of the oil pipe 3 by a sealing cover 6 . Conduit 18 is fixed on the oil storage pipe 4 lower ends by conduit righting anchor 21, and motor casing 17 is fixed in the conduit 18 by motor righting anchor 16, and has oil passage on the motor righting anchor 16. The magnet 19 is fixed in the motor casing 17, the mover 20 is fixed on the motor shaft 14, the mover 20 can reciprocate up and down along the magnet 19, and the sealing box 15 is installed between the motor casing 17 and the motor shaft 14 for The dynamic seal between the motor shaft 14 and the motor casing 17 prevents oil from entering the inside of the motor casing 17 . The upper end of the motor shaft 14 is connected with the plunger 13, on which the oil inlet valve 12 is installed, and the plunger 13 is located in the pump barrel 11. The lower end of the pump barrel 11 is fixed to the upper end of the conduit 18 , and the upper end of the pump barrel 11 is connected to the inner wall of the oil storage pipe 4 . The pressure sensor 8 is installed on the upper end surface of the pump barrel 11 . The sealing ring 9 is installed between the pump cylinder 11 and the oil storage pipe 4, and the sealing ring 9 separates the oil storage pipe 4 into two chambers, an upper chamber and an upper chamber. The electric submersible pump 1 is located at the bottom of the upper chamber of the oil storage pipe 4 . Oil outlet valve 10 is installed on pump cylinder 11 tops, and oil outlet valve 10 is a fixed valve. The cable 7 penetrates through the annular space of the oil pipe 3 and the casing 5, passes through the sealing cover 6 and connects with the electric submersible pump 1, and then passes down through the pump barrel 11, the sealing ring 9, and the conduit 18 to connect with the linear motor.

When working, the motor shaft 14 reciprocates up and down in the conduit 18. When the motor shaft 14 moves downward, the oil outlet valve 10 is closed, the oil inlet valve 12 is opened, and the oil flows from the casing 5 through the motor casing 17 and The channel between the conduits 18 enters the pump barrel 11 through the oil inlet valve 12; when the motor shaft 14 moves upward, the oil inlet valve 12 closes, the oil outlet valve 10 opens, and the oil in the pump barrel 11 is pumped through the oil outlet valve 10. Delivered to the upper cavity of oil storage pipe 4. The pressure sensor 8 is used to detect the amount of oil in the upper cavity of the oil storage pipe 4. When the oil amount reaches the oil pumping threshold, the linear motor oil well pump stops working, and the electric submersible pump 1 starts to work to pump the oil from the oil storage pipe 4. until the amount of oil in the oil storage pipe 4 is lower than the oil inlet threshold, the electric submersible pump 1 suspends its work, and the linear motor oil well pump starts to work, pumping the oil to the oil storage pipe 4 for storage, and reciprocating in this way for intermittent pump oil.

Replace the linear motor oil well pump with other low-power electric submersible pumps, and use the low-power electric submersible pump to pump the oil in the oil reservoir to the oil storage pipe for storage. When the oil volume in the oil storage pipe reaches a certain value, use high-power The electric submersible pump pumps the oil to the ground, and this modification should be regarded as within the technical solution of the utility model.

Claims (2)

1. the composite oil pumping device of a kind of linear dynamo oil pump and electric submersible pump concatenation, including electric submersible pump, oil storing tube, linear motor Oil well pump, specifically by electric submersible pump (1), connector (2), oil pipe (3), oil storing tube (4), casing (5), sealing cover (6), cable (7), pressure Force snesor (8), sealing ring (9), delivery valve (10), pump barrel (11), inlet valve (12), plunger (13), motor shaft (14), sealing Box (15), motor righting anchor (16), motor casing (17), conduit (18), magnet (19), mover (20), conduit righting anchor (21) group At；It is characterized in that：Oil storing tube is divided into two chambers, and electric submersible pump is mounted in the upper chamber of oil storing tube, linear dynamo oil pump It is anchored in the lower chambers of oil storing tube by conduit righting；Electric submersible pump is on oil pipe bottom, connector lower end and electric submersible pump End is connected, and upper end of joint is connected with oil pipe lower end；Oil storing tube is fixed on oil pipe lower part using sealing cover；Conduit is by conduit righting anchor It is fixed on oil storing tube lower end, motor casing is anchored on by motor righting in conduit, and oil passage is provided on motor righting anchor；Magnet It is fixed in motor casing, mover is fixed on motor shaft, and seal box is mounted between motor casing and motor shaft；Motor shaft upper end with Plunger connects, and plunger is located in pump barrel；Pump barrel lower end is fixed with conduit upper end, and pump barrel upper end connects with oil storage inside pipe wall；Sealing Ring is mounted between pump barrel and oil storing tube, and cable is penetrated by the annular space of oil pipe and casing, is connected with electric submersible pump across sealing cover, then Pump barrel, sealing ring, conduit is passed through to be connected with linear motor down；Pressure sensor is mounted on the upper surface of pump barrel, for detecting Fluid amount in oil storing tube epicoele.

2. the composite oil pumping device of a kind of linear dynamo oil pump and electric submersible pump concatenation as described in claim 1, feature exist In：The motor shaft upper end is connect with plunger, and inlet valve is installed on plunger, and inlet valve is travelling valve；Delivery valve is mounted on pump Cylinder top, delivery valve are fixed valve.