Electric submersible pump desanding device

Abstract

The utility model discloses a desanding device for an electric submersible pump, which comprises a pipe body, a plurality of groups of filter screen cylinders and filter pipes capable of filtering sand are rotatably mounted on the inner side of the pipe body, and the filter pipes are in flange connection with the filter screen cylinders. Rotary joints for connection are assembled between the filter pipe and the feeding end of the pipe body and between the filter screen cylinder and the discharging end of the pipe body, and a rotating shaft for driving the filter pipe and the filter screen cylinder to rotate is rotatably mounted in the pipe body. The pipe body can be installed between the multi-stage centrifugal pump and the separator, so that a filtering and intercepting protection procedure is formed between the multi-stage centrifugal pump and the separator, the possibility that sandstone chippings enter the multi-stage centrifugal pump along with petroleum exploitation is conveniently reduced, and therefore the influence of the sandstone chippings on an electric submersible pump is reduced; the electric submersible pump can smoothly and safely lift petroleum, and the service life of the electric submersible pump can be prolonged conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of submersible electric pump sand removal equipment, in particular to a submersible electric pump sand removal device. Background Art

[0002] The submersible electric pump is a multi-stage centrifugal pump working underground. It is lowered into the well together with the oil pipe. The ground power supply transmits electric energy to the underground submersible motor through the transformer, control panel and power cable, so that the submersible motor drives the multi-stage centrifugal pump to rotate, converts the electric energy into mechanical energy, and lifts the well fluid in the oil well to the ground. However, as the amount of water inside the formation gradually increases with the continuous development of the oil field, these water will flush the sandstone inside the formation, making the sandstone loose with the flushing of the water. The loose sandstone debris is easy to enter the oil pipe during the oil production process, and it is very easy to enter the submersible electric pump used for lifting oil with the oil. The structure inside the submersible electric pump is relatively precise. These sandstone debris entering it not only easily leads to blockage inside the submersible electric pump, but also easily causes friction damage between the precise structure inside the submersible electric pump and the sandstone debris. To this end, we propose a submersible electric pump sand removal device. Utility Model Content

[0003] The main purpose of the utility model is to provide a submersible electric pump sand removal device. Through the design of the pipe body, filter tube, filter cylinder, swivel joint, cross bracket, rotating shaft and filter cover, the pipe body can be installed between the multi-stage centrifugal pump and the separator, so that a filtering and intercepting protection process is formed between the two, which is convenient for reducing the possibility of sandstone debris entering the interior of the multi-stage centrifugal pump during oil extraction, thereby reducing the impact of sandstone debris on the submersible electric pump, so that the submersible electric pump can smoothly and safely lift oil, and conveniently increase the service life of the submersible electric pump, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A submersible electric pump sand removal device comprises a pipe body, a filter tube and a filter screen cartridge for filtering sand are rotatably mounted inside the pipe body, and there are multiple groups of filter screen cartridges, the filter tube is flange-connected to the filter screen cartridge, a swivel joint for connection is installed between the filter tube and the pipe body feed end and between the filter screen cartridge and the pipe body discharge end, a rotating shaft for driving the filter tube and the filter screen cartridge to rotate is rotatably mounted inside the pipe body, and a cross bracket connected to the filter tube and the filter screen cartridge is sleeved on the outer circumference of the rotating shaft, and there are multiple groups of cross brackets;

[0006] A filter cover for blocking sand is installed on the side of the rotary joint away from the filter cylinder, a straight pipe connected to the discharge end of the filter cover is installed on the outer periphery of the tube body, a feeding screw for guiding material is rotatably installed on the inner side of the straight pipe, and a motor for driving the feeding screw is installed at the end of the straight pipe away from the tube body, and an electric valve for controlling opening and closing is installed at the discharge end of the straight pipe.

[0007] Furthermore, the outer periphery of the motor is equipped with a casing located on the outer wall surface of the straight pipe; the casing is convenient for protecting the motor so that the motor will not be affected by external objects when operating in the oil well.

[0008] Furthermore, the outer periphery of one end of the swivel joint away from the filter cylinder is equipped with support rods that can be used for connection, and there are multiple groups of support rods, and the end of the support rod away from the swivel joint is equipped with a ring seat that is clamped with the tube body; the ring seat is conveniently clamped on the side of the tube body close to the discharge end, and the ring seat is connected to the end of the swivel joint away from the filter cylinder through the support rod, which is convenient for fixing the position of the swivel joint at this end without affecting the rotation of the filter cylinder.

[0009] Furthermore, a guide plate located inside the filter tube is sleeved on the outer periphery of the rotating shaft, and straight rods that can be used for connection are installed on the outer periphery of the guide plate, and there are multiple groups of straight rods, and the straight rods are bolted to the filter tube; the guide plate facilitates the diversion of the oil entering the filter tube, thereby improving the filtering effect of the oil, and the straight rods facilitate the connection between the guide plate and the filter tube.

[0010] Furthermore, the straight pipe discharge end is equipped with a branch pipe that can be used for guiding materials; the branch pipe is convenient for connecting with other pipelines, so as to facilitate the flow guidance of materials discharged from the straight pipe.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The technical solution of the present application enables the pipe body to be installed between the multi-stage centrifugal pump and the separator through the design of the pipe body, filter pipe, filter cylinder, swivel joint, cross bracket, rotating shaft and filter cover, thereby forming a filtering and intercepting protective process between the two, which is convenient for reducing the possibility of sandstone debris entering the multi-stage centrifugal pump with the extraction of oil, thereby reducing the impact of sandstone debris on the submersible electric pump, allowing the submersible electric pump to lift oil smoothly and safely, and conveniently increasing the service life of the submersible electric pump.

[0013] 2. The technical solution of the present application facilitates the discharge of sandstone debris accumulated in the filter cover through the design of straight pipes, feeding screws, motors and electric valves, so that these sandstone debris can be centrally processed and will no longer affect oil extraction, thereby facilitating the improvement of the diversity of the device functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a schematic diagram of the overall structure of a submersible electric pump sand removal device.

[0015] Figure 2 The utility model is a schematic plan view of the overall structure of a submersible electric pump sand removal device.

[0016] Figure 3 It is a structural plane diagram of a part A of the overall mechanism of a submersible electric pump sand removal device of the utility model.

[0017] In the figure: 1. pipe body; 2. filter tube; 3. filter cylinder; 4. swivel joint; 5. cross bracket; 6. rotating shaft; 7. filter cover; 8. straight pipe; 9. feeding screw; 10. motor; 11. electric valve; 12. branch pipe; 13. casing; 14. support rod; 15. ring seat; 16. guide plate; 17. straight rod. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] like Figure 1-3 As shown, a submersible electric pump sand removal device comprises a pipe body 1, a filter tube 2 and a filter screen cartridge 3 for filtering sand are rotatably installed inside the pipe body 1, and there are multiple groups of filter screen cartridges 3, the filter tube 2 is flange-connected with the filter screen cartridge 3, a swivel joint 4 for connection is installed between the filter tube 2 and the feed end of the pipe body 1 and between the filter screen cartridge 3 and the discharge end of the pipe body 1, a rotating shaft 6 for driving the filter tube 2 and the filter screen cartridge 3 to rotate is rotatably installed inside the pipe body 1, and a rotating shaft 6 for connecting with the filter tube 2 is sleeved on the outer circumference of the rotating shaft 6. A cross bracket 5 connected to the filter cylinder 3, and there are multiple groups of cross brackets 5; a filter cover 7 that can be used to block sand is installed on the side of the rotary joint 4 away from the filter cylinder 3, a straight pipe 8 connected to the discharge end of the filter cover 7 is installed on the outer periphery of the tube body 1, a feeding screw 9 that can be used to guide the material is rotatably installed on the inner side of the straight pipe 8, and a motor 10 that can be used to drive the feeding screw 9 is installed on the end of the straight pipe 8 away from the tube body 1, and an electric valve 11 that can be used to control opening and closing is installed at the discharge end of the straight pipe 8.

[0020] like Figure 2 and Figure 3As shown, the outer periphery of the motor 10 is equipped with a sleeve 13 located on the outer wall surface of the straight tube 8; the sleeve 13 is convenient for protecting the motor 10, so that the motor 10 will not be affected by external things when operating in the oil well; the outer periphery of the end of the swivel joint 4 away from the filter cylinder is equipped with a support rod 14 that can be used for connection, and there are multiple groups of support rods 14, and the end of the support rod 14 away from the swivel joint 4 is equipped with a ring seat 15 that is clamped with the pipe body 1; the ring seat 15 is convenient for clamping on the side of the inside of the pipe body 1 close to the discharge end, and the ring seat 15 is connected to the end of the swivel joint 4 away from the filter cylinder 3 through the support rod 14, so as to fix the position of the swivel joint 4 at this end, and at the same time will not affect the rotation of the filter cylinder 3; the discharge end of the straight tube 8 is equipped with a branch pipe 12 that can be used for guiding materials; the branch pipe 12 is convenient for connecting with other pipelines, so as to facilitate the diversion of materials discharged from the straight tube 8.

[0021] like Figure 2 As shown, a guide plate 16 located on the inner side of the filter tube 2 is sleeved on the outer periphery of the rotating shaft 6, and a straight rod 17 that can be used for connection is installed on the outer periphery of the guide plate 16, and there are multiple groups of straight rods 17, and the straight rods 17 are bolted to the filter tube 2; the guide plate 16 is convenient for diverting the oil entering the filter tube 2, thereby improving the filtering effect of the oil, and the straight rods 17 are convenient for connecting the guide plate 16 and the filter tube 2.

[0022] It should be noted that the utility model is a submersible electric pump desanding device. When working, the pipe body 1 is first installed between the multi-stage centrifugal pump and the separator in the submersible electric pump according to the corresponding installation requirements. At the same time, the two ends of the rotating shaft 6 are conveniently connected to the submersible motor 10 in the submersible electric pump, so that the rotating shaft 6 can be driven and rotated by the submersible motor 10. When the oil passes through the separator and then enters the pipe body 1, the oil will first enter the filter tube 2 in the pipe body 1, and at this time, the filter tube 2 rotates with the rotation of the rotating shaft 6. At the same time, the multiple groups of filter cylinders 3 in the pipe body 1 also rotate with the rotating shaft 6. The oil entering the filter tube 2 will first be diverted through the guide plate 16. At the same time, the diverted oil enters the filter tube 2 and becomes centrifugal with the high-speed rotation of the filter tube 2, so that the sandstone debris in the oil is intercepted in the filter tube 2, and the oil will flow out from the filter mesh in the filter tube 2. Then the pipe body 1 is convenient for diverting the oil, and at the same time, the sandstone debris will also enter the filter cylinder 3 with the squeezing force of the oil. The filter cylinder 3 can also filter oil like the filter tube 2, and the multiple groups of filter cylinders 3 in the pipe body 1 cooperate with each other to improve the filtering efficiency of oil. Then the filtered oil will enter the multi-stage centrifugal pump in the submersible electric pump, which is convenient for the oil to be smoothly lifted and mined, and reduces the possibility of sandstone debris entering the multi-stage centrifugal pump. At this time, the sandstone debris will be concentrated and intercepted in the filter cover 7 and accumulated therein. When it accumulates to a certain extent and the detector set up around it detects that the debris accumulated inside the filter cover 7 meets the requirements, the electric valve 11 at the discharge end of the straight pipe 8 is operated and the blocked discharge port is released, and then the motor 10 on the outer periphery of the straight pipe 8 is powered on and operated. The operation of the motor 10 drives the feeding screw 9 on the inner side of the straight pipe 8 to rotate, and the sandstone debris accumulated inside the filter cover 7 can enter the straight pipe 8 as the feeding screw 9 is extracted, and then these sandstone debris can be discharged from the branch pipe 12 and it is convenient to treat them separately, so that the sandstone debris will not flow back into the oil layer.

[0023] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A submersible electric pump desanding device, comprising a pipe body (1), characterized in that: A filter tube (2) and a filter screen cartridge (3) for filtering sand are rotatably mounted inside the tube body (1), and there are multiple groups of filter screen cartridges (3). The filter tube (2) and the filter screen cartridge (3) are flange-connected, and a swivel joint (4) for connection is installed between the filter tube (2) and the feed end of the tube body (1) and between the filter screen cartridge (3) and the discharge end of the tube body (1). A rotating shaft (6) for driving the filter tube (2) and the filter screen cartridge (3) to rotate is rotatably mounted inside the tube body (1), and a cross bracket (5) connected to the filter tube (2) and the filter screen cartridge (3) is sleeved on the outer circumference of the rotating shaft (6), and there are multiple groups of cross brackets (5); A filter cover (7) for blocking sand is installed on the side of the rotary joint (4) away from the filter cylinder (3), a straight pipe (8) connected to the discharge end of the filter cover (7) is installed on the outer periphery of the tube body (1), a feeding screw (9) for guiding material is rotatably installed inside the straight pipe (8), and a motor (10) for driving the feeding screw (9) is installed on the end of the straight pipe (8) away from the tube body (1), and an electric valve (11) for controlling opening and closing is installed at the discharge end of the straight pipe (8).

2. A submersible electric pump sand removal device according to claim 1, characterized in that: The outer periphery of the motor (10) is equipped with a casing (13) located on the outer side wall surface of the straight tube (8).

3. A submersible electric pump sand removal device according to claim 1, characterized in that: The outer periphery of one end of the swivel joint (4) away from the filter cartridge is equipped with a supporting rod (14) that can be used for connection, and there are multiple groups of supporting rods (14). The end of the supporting rod (14) away from the swivel joint (4) is equipped with a ring seat (15) that is clamped with the pipe body (1).

4. A submersible electric pump sand removal device according to claim 1, characterized in that: The outer periphery of the rotating shaft (6) is sleeved with a guide plate (16) located inside the filter tube (2), and the outer periphery of the guide plate (16) is equipped with straight rods (17) that can be used for connection, and there are multiple groups of straight rods (17), and the straight rods (17) are bolted to the filter tube (2).

5. The submersible electric pump sand removal device according to claim 1, characterized in that: The discharge end of the straight pipe (8) is equipped with a branch pipe (12) that can be used for guiding materials.

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