Three-channel hydraulic motor direct connection screw pump oil and water extraction equipment

Abstract

The utility model provides three-channel hydraulic motor direct connection screw pump oil and water extraction equipment, and mainly relates to the field of oil extraction. A three-channel hydraulic motor direct connection screw pump oil and water extraction device comprises a hydraulic motor guide cylinder, a hydraulic motor is arranged in the hydraulic motor guide cylinder, an upper connector is located on the top of a motor upper sealing connector, and a backflow channel is arranged between the upper connector and the motor upper sealing connector. The bottom of the hydraulic motor guide cylinder is provided with a lower connector, the bottom of the lower connector is connected with a pump coupling connector, the bottom of the pump coupling connector is provided with an oil pipe coupling, the bottom of the oil pipe coupling is provided with a screw pump, and the outer side of the pump coupling connector is sleeved with an oil outlet eccentric conversion sleeve. An oil outlet channel is arranged on one side of the oil outlet eccentric conversion sleeve and connected with a liquid discharging pipe. The utility model has the beneficial effects that the long-distance transmission of the sucker rod is canceled, so that the problem that the sucker rod is broken and falls off is fundamentally avoided, and the problem that the sucker rod abrades and penetrates through an oil pipe is also avoided.

Description

Technical Field

[0001] The utility model mainly relates to the field of oil production, in particular to a three-channel hydraulic motor directly connected to a screw pump oil and water production equipment. Background Art

[0002] The mechanical screw oil extraction technology currently used in some shallow wells in oil mines uses an electric motor or diesel engine as the power on the ground, and uses the sucker rod to transmit power to drive the underground screw pump to extract oil (water), and then export the oil (water) to the ground through the oil pipe for collection.

[0003] This current oil recovery method has the following disadvantages:

[0004] 1. The sucker rod passes through the oil pipe for a long distance transmission, and the sucker rod is subjected to a large torque, which is easy to break and cause production accidents.

[0005] 2. The outer wall of the sucker rod rubs against the inner wall of the oil pipe. The long-term rotation of the sucker rod can easily wear through the oil pipe, reducing the service life of the oil pipe. Utility Model Content

[0006] In order to solve the deficiencies of the prior art, the utility model provides a three-channel hydraulic motor directly connected to a screw pump oil and water production equipment, which can overcome the above problems existing in the sucker rod driving technology.

[0007] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0008] A three-channel hydraulic motor direct-connected screw pump oil and water production equipment, comprising a hydraulic motor guide tube, a hydraulic motor is arranged in the hydraulic motor guide tube, a motor upper sealing joint is arranged on the top of the hydraulic motor, an upper joint is arranged on the top of the hydraulic motor guide tube, the upper joint is located on the top of the motor upper sealing joint, a counterflow channel is provided between the upper joint and the motor upper sealing joint, a power fluid channel plug joint is arranged on the top of the motor upper sealing joint, the power fluid channel plug joint passes through the upper joint and does not close the middle channel of the upper joint, the power fluid channel plug joint and the motor upper sealing joint have There is a connected central channel, a lower joint is arranged at the bottom of the hydraulic motor guide tube, the bottom of the lower joint is connected to the pump joint, an oil pipe coupling is arranged at the bottom of the pump joint, a screw pump is arranged at the bottom of the oil pipe coupling, and a limit coupling is connected to the bottom of the screw pump. The hydraulic motor and the screw pump are transmitted through the cooperation of the transmission shaft and the hydraulic motor sealing transmission rod. An oil outlet eccentric conversion sleeve is sleeved on the outer side of the pump joint, one side of the oil outlet eccentric conversion sleeve is provided with an oil outlet channel, a drain pipe is connected to the oil outlet channel, and an inclined drainage hole connected to the reverse flow channel is provided on the outer side of the pump joint.

[0009] The screw pump comprises a screw pump rotor and a screw pump stator. The screw pump stator is fixedly connected to the pump joint through an oil pipe coupling. A sucker rod coupling is arranged on the top of the screw pump rotor, and the sucker rod coupling is connected to the sealing transmission rod of the hydraulic motor.

[0010] The hydraulic motor comprises a hydraulic motor stator and a hydraulic motor rotor. The top of the hydraulic motor stator is fixedly connected to a sealing joint on the motor. A flow guide gap is provided between the hydraulic motor stator and the hydraulic motor guide tube.

[0011] At least one sealing ring is arranged between the hydraulic motor sealing transmission rod and the lower joint, and between the hydraulic motor sealing transmission rod and the pump coupling joint.

[0012] A unloading valve is arranged at the bottom of the oil outlet passage of the oil outlet eccentric conversion sleeve.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model adopts high-pressure hydraulic water as the power, and can drive the screw pump downhole through the ground to supply power fluid. The power fluid returns to the ground water tank through the oil pipe and the central pipe annulus, and does not mix with the underground mineralized fluid. The screw pump circulates back and forth, and the mined oil and water are stored separately, avoiding the separation step of the driving fluid.

[0015] The utility model changes the structure of long-distance transmission using the sucker rod, thereby fundamentally avoiding the problem of the sucker rod breaking off. At the same time, the long-distance sucker rod transmission is cancelled, and the grinding of the sucker rod on the oil pipe is avoided, and the sucker rod is prevented from wearing through the oil pipe.

[0016] This device uses a ground high-pressure multi-stage pump to provide a screw pump for the hydraulic motor, which has low failure rate and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 It is a schematic diagram of the structure of the utility model in a horizontal position.

[0018] The numbers shown in the accompanying drawings are: 1. power fluid channel plug connector; 2. upper connector; 3. motor upper sealing connector; 4. hydraulic motor; 4-1. hydraulic motor stator; 4-2. hydraulic motor rotor; 5. hydraulic motor guide tube; 6. transmission shaft; 7. hydraulic motor sealing transmission rod; 8. lower connector; 9. pump coupling; 10. oil outlet eccentric conversion sleeve; 11. sucker rod coupling; 12. oil pipe coupling; 13. drain pipe; 14. unloading valve; 15. screw pump; 15-1. screw pump rotor; 15-2. screw pump stator; 16. sealing ring; 17. limit coupling; 21. reverse flow channel; 22. center channel; 23. oil outlet channel. DETAILED DESCRIPTION

[0019] The utility model is further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the utility model and are not used to limit the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by this application.

[0020] like Figure 1 As shown, the three-channel hydraulic motor direct-connected screw pump oil and water production equipment described in the utility model includes a hydraulic motor guide tube 5, and a hydraulic motor 4 is arranged in the hydraulic motor guide tube 5. The hydraulic motor 4 includes a hydraulic motor stator 4-1 and a hydraulic motor rotor 4-2. The top of the hydraulic motor stator 4-1 of the hydraulic motor 4 is threadedly connected with a motor upper sealing joint 3. The hydraulic motor stator 4-1 is pressed and fixed in the hydraulic motor guide tube 5 by the motor upper sealing joint 3. The upper end of the hydraulic motor stator 4-1 is connected to the power fluid channel plug-in connector 1 with a ZG thread. The lower end transmission shaft 6 of the hydraulic motor rotor 4-2 is equipped with a hydraulic motor sealing transmission rod 7 with a power fluid discharge hole. The hydraulic motor sealing transmission rod 7 is connected to the screw pump rotor by a coupling. The top of the hydraulic motor guide tube 5 is threadedly connected with an upper joint 2, the upper joint 2 is located at the top of the motor upper sealing joint 3 and the upper joint 2 presses the motor upper sealing joint 3, the bottom of the hydraulic motor guide tube 5 is provided with a lower joint 8, and the hydraulic motor stator 4-1 is connected and fastened with the hydraulic motor guide tube 5 through the upper joint 2 and the lower joint 8. Further, the outer ring of the upper joint 2 and the outer ring of the lower joint 8 each have at least one sealing groove, and in this embodiment, two sealing grooves are provided on the outer rings of the upper joint 2 and the lower joint 8, and there are sealing rings in the sealing grooves, so as to ensure that the upper joint 2, the lower joint 8 and the hydraulic motor guide tube 5 are sealed and connected, so that the driving fluid can complete a stable circulation.

[0021] The outer circumference of the motor upper sealing joint 3 is uniformly distributed with 6-10 drainage grooves, so that a counterflow channel 21 is formed between the upper joint 2 and the motor upper sealing joint 3. The power fluid channel plug joint 1 is set on the top of the motor upper sealing joint 3. The power fluid channel plug joint 1 passes through the upper joint 2 and does not close the middle channel of the upper joint 2. The center of the motor upper sealing joint 3 has a φ20 straight hole. The power fluid channel plug joint 1 is a tubular structure, which is connected with the φ20 straight hole of the motor upper sealing joint 3 to form a central channel 22. There is a 3-4mm gap between the outer diameter of the hydraulic motor stator 4-1 and the inner diameter of the hydraulic motor guide tube 5.

[0022] The bottom of the lower joint 8 is connected to the pump joint 9, and the bottom of the pump joint 9 is provided with an oil pipe coupling 12. The lower joint 8 uses a 2-7 / 8 double male oil pipe joint, and the bottom of the oil pipe coupling 12 is connected to the screw pump 15. The pump joint 9 is equipped with an oil outlet eccentric conversion sleeve 10. The hydraulic motor seal transmission rod 7 of the lower transmission shaft of the hydraulic motor 4 is sealed and connected to the sucker rod coupling 11 by the drill pipe thread. The hydraulic motor seal transmission rod 7 is provided with a concentric hole with a bottom that is blocked. The side of the hydraulic motor seal transmission rod 7 has a 6-φ10 oblique drainage hole connected to the concentric hole, and the oblique drainage hole is connected to the overall reflux channel 21. Two sets of sealing grooves are processed on both sides of the lower outer circle of the hydraulic motor seal transmission rod 7. The large through hole diameter of the oil outlet eccentric conversion sleeve 10 is φ73, and a small parallel eccentric hole is provided on one side thereof, and ZG1 / 2" sealing threads are processed on both ends. A φ16 radial through hole is provided on the inner side of the oil outlet eccentric conversion sleeve 10. The small parallel eccentric hole and the radial through hole form an oil outlet channel 23, and the oil outlet channel 23 is connected to the drain pipe 13. A relief valve 14 is provided at the bottom of the oil outlet channel 23 of the oil outlet eccentric conversion sleeve 10, and the relief valve 14 serves as a protective component to prevent an explosion accident caused by excessive pressure.

[0023] The screw pump 15 includes a screw pump rotor 15-1 and a screw pump stator 15-2, wherein the screw pump stator 15-2 is fixedly connected to the bottom of the pump coupling 9 through an oil pipe coupling 12, and a sucker rod coupling 11 is arranged on the top of the screw pump rotor 15-1, and the sucker rod coupling 11 is connected to the hydraulic motor seal transmission rod 7. The bottom of the screw pump 15 is connected to a limit coupling 17, and the hydraulic motor 4 and the screw pump 15 are driven by the cooperation of the transmission shaft 6 and the hydraulic motor seal transmission rod 7.

[0024] At least one sealing ring 16 is arranged between the hydraulic motor sealing transmission rod 7 and the lower joint 8, and between the hydraulic motor sealing transmission rod 7 and the pump coupling joint 9, so as to complete the rotational sealing of the hydraulic motor sealing transmission rod 7 and separate the power fluid at the top from the extracted oil (water) at the bottom.

[0025] This device is used in conjunction with a ground high-pressure centrifugal multi-stage pump body. The power fluid enters the power fluid channel plug connector 1 from the wellhead through the pump body, and drives the hydraulic motor rotor 4-2 through the central channel 22 composed of the power fluid channel plug connector 1 and the motor upper sealing joint 3, so that the hydraulic motor rotor 4-2 starts to rotate. The screw pump rotor 15-1 is driven to rotate through the transmission of the hydraulic motor sealing transmission rod 7. When the liquid is full and reaches a certain pressure and torque, the screw pump 15 starts to extract liquid. The rotation of the screw pump rotor 15-1 and the change in the volume of the inner cavity of the screw pump stator 15-2 generate pressure, and the oil (water) enters the discharge pipe 3 through the oil outlet channel 23 in the oil outlet eccentric conversion sleeve 10 and reaches the ground. The power fluid enters the annular space between the hydraulic motor guide tube 5 and the hydraulic motor stator 4-1 through the concentric circle hole of the pump joint 9 and the oblique discharge hole of 6-φ10, and then returns to the ground water tank through the reflux channel 21 on the upper part of the hydraulic motor 4 for reuse.

[0026] The ground power source of this device adopts a high-pressure multi-stage centrifugal pump. During operation, the lower part of the pump is connected to the air anchor, sand control pipe and other pipe string tools, the reel-type high-pressure soft discharge pipe is installed on the discharge conversion joint of the screw pump, the oil pipe and the discharge pipe are tested for sealing pressure according to the operation requirements, and finally the power fluid center pipe is lowered and pressure tested.

Claims

1. A three-channel hydraulic motor directly connected to a screw pump oil and water production equipment, comprising a hydraulic motor guide tube (5), characterized in that: A hydraulic motor (4) is arranged in the hydraulic motor guide tube (5), a motor upper sealing joint (3) is arranged on the top of the hydraulic motor (4), an upper joint (2) is arranged on the top of the hydraulic motor guide tube (5), the upper joint (2) is located on the top of the motor upper sealing joint (3), a counterflow channel (21) is provided between the upper joint (2) and the motor upper sealing joint (3), a power fluid channel plug joint (1) is arranged on the top of the motor upper sealing joint (3), the power fluid channel plug joint (1) passes through the upper joint (2) and does not close the middle channel of the upper joint (2), the power fluid channel plug joint (1) and the motor upper sealing joint (3) have a central channel (22) that is connected, and a central channel (22) is provided at the bottom of the hydraulic motor guide tube (5). A lower joint (8) is arranged, the bottom of the lower joint (8) is connected to a pump joint (9), an oil pipe coupling (12) is arranged at the bottom of the pump joint (9), a screw pump (15) is arranged at the bottom of the oil pipe coupling (12), a limit coupling (17) is connected to the bottom of the screw pump (15), the hydraulic motor (4) and the screw pump (15) are driven by the cooperation of a drive shaft (6) and a hydraulic motor sealing drive rod (7), an oil outlet eccentric conversion sleeve (10) is sleeved on the outer side of the pump joint (9), one side of the oil outlet eccentric conversion sleeve (10) is provided with an oil outlet channel (23), the oil outlet channel (23) is connected to a liquid discharge pipe (13), and the outer side of the pump joint (9) is provided with an inclined liquid discharge hole connected to a counterflow channel (21).

2. The three-channel hydraulic motor direct-connected screw pump oil and water production equipment according to claim 1 is characterized by: The screw pump (15) comprises a screw pump rotor (15-1) and a screw pump stator (15-2); the screw pump stator (15-2) is fixedly connected to a pump coupling (9) via an oil pipe coupling (12); a sucker rod coupling (11) is arranged on the top of the screw pump rotor (15-1); and the sucker rod coupling (11) is connected to a hydraulic motor sealing transmission rod (7).

3. The three-channel hydraulic motor direct-connected screw pump oil and water production equipment according to claim 1 is characterized by: The hydraulic motor (4) comprises a hydraulic motor stator (4-1) and a hydraulic motor rotor (4-2); the top of the hydraulic motor stator (4-1) is fixedly connected to a sealing joint (3) on the motor; and a flow guide gap is provided between the hydraulic motor stator (4-1) and a hydraulic motor guide tube (5).

4. The three-channel hydraulic motor direct-connected screw pump oil and water production equipment according to claim 1 is characterized by: At least one sealing ring (16) is provided between the hydraulic motor sealing transmission rod (7) and the lower joint (8), and between the hydraulic motor sealing transmission rod (7) and the pump coupling joint (9).

5. The three-channel hydraulic motor direct-connected screw pump oil and water production equipment according to claim 1 is characterized by: A unloading valve (14) is arranged at the bottom of the oil outlet passage (23) of the oil outlet eccentric conversion sleeve (10).

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