Horizontal Well Twin-Screw Fluid Production Method and System

Abstract

This invention relates to a horizontal well twin-screw fluid production method and system, belonging to the field of oil and gas equipment technology. The horizontal well twin-screw fluid production method includes: Drilling operation: The power fluid is pressurized to form hydraulic power fluid, which is transmitted to the screw motor through the hydraulic power fluid pipeline, providing a pressure difference to drive the screw motor to rotate, thereby driving the drill bit to perform drilling operations; Lifting and separation of formation produced fluid: The screw pump rotates under the rotation of the screw motor, creating a pressure difference in multiple sealed chambers within the screw pump, continuously drawing in formation produced fluid, which is then transmitted to the surface through the lift pipeline under the action of the pressure difference, and then separated, with the resulting separated fluid becoming new power fluid; Circulation: The "drilling operation" and "lifting and separation of formation produced fluid" operations are continuously repeated. The horizontal well twin-screw fluid production method and system provided by this invention are suitable for horizontal wells and directional wells, with a large recoverable depth and high natural pump efficiency.

Description

Technical Field

[0001] This invention belongs to the field of oil and gas equipment technology, and specifically relates to a method and system for horizontal well dual-screw fluid production. Background Technology

[0002] For most old oilfields, horizontal well technology is an advanced technology for development, potential tapping, and enhanced oil recovery. Horizontal wells, and the branch wells and multi-layer, multi-bottom well technologies developed based on them, have become an inevitable trend in the development of my country's petroleum industry. In terms of basic research, my country's research on horizontal well development technology is constantly progressing, especially in reservoir engineering, artificial lift, near-wellbore flow mechanisms, and heavy oil extraction, achieving significant progress and a series of important results. However, the following shortcomings have been identified in existing technologies:

[0003] 1. The drawbacks of conventional rod pumps are: during oil production, due to the large well depth, the stroke loss is large. In addition, due to the influence of well structure and crude oil properties, sucker rod breakage and uneven wear are likely to occur.

[0004] 2. The disadvantages of hydraulic jet pumps are: the pump efficiency is relatively low, there are certain requirements for the submersion of the oil well, and back pressure will affect the pump efficiency.

[0005] 3. The drawbacks of hydraulic piston pumps are: the sealing between the power end of the surface pump and the downhole pump is difficult, and the pump maintenance is also difficult.

[0006] 4. The disadvantages of gas lift oil production are: complex surface equipment, high operating costs, and low gas energy utilization rate. Furthermore, gas lift oil production has high requirements for gas source, necessitating the establishment of corresponding gas compressor stations. Continuous gas lift under high pressure conditions can easily lead to safety accidents, and gas lift oil production is not suitable for well networks with large well spacing.

[0007] Based on this, the present invention provides a method and system for fluid production in horizontal wells using a twin-screw pump. Summary of the Invention

[0008] To address the aforementioned problems, this invention provides a method and system for horizontal well dual-screw fluid production.

[0009] One object of the present invention is to provide a method for fluid production in horizontal wells using a twin-screw pump.

[0010] The horizontal well twin-screw fluid production method includes:

[0011] Drilling operation: The power fluid is pressurized to form hydraulic power fluid, which is transmitted to the screw motor through the hydraulic power fluid pipeline and provides a pressure difference to drive the screw motor to rotate, thereby driving the drill bit to perform drilling operations;

[0012] Lifting and separation of formation produced fluid: The screw pump rotates under the rotation of the screw motor, which creates a pressure difference in multiple sealed chambers inside the screw pump. It continuously draws in formation produced fluid and transfers it to the surface through the lifting pipeline under the action of the pressure difference. After separation, the resulting separated fluid is a new kinetic fluid.

[0013] Cycle: The process of continuously repeating the "drilling operation" and "lifting and separating formation produced fluids" operations.

[0014] As a further aspect of the present invention, the pressurization of the power fluid includes: the power fluid being transmitted to an electric three-plunger pump and pressurized by the electric three-plunger pump.

[0015] As a further aspect of the present invention, the hydraulic power pipeline includes a production hydraulic pipeline, a power hydraulic pipeline, and a connecting pipeline.

[0016] As a further aspect of the present invention, the aspiration includes: the formation produced fluid entering the screw pump through an aspiration screen tube.

[0017] As a further embodiment of the present invention, the lifting pipeline includes a production oil pipe and a central small hydraulic pipeline.

[0018] As a further embodiment of the present invention, the multiple sealing cavities inside the screw pump are formed by the screw pump rotor and the screw pump stator.

[0019] As a further aspect of the present invention, the separation of the formation produced fluid includes: separating the formation produced fluid using an oil-gas-liquid separation device.

[0020] Another object of the present invention is to provide a horizontal well twin-screw fluid production system.

[0021] The horizontal well twin-screw fluid production system includes a downhole rod-tube pump system, a production manifold system, and a surface power pump station;

[0022] The downhole rod-tube pump system is used for drilling operations and for lifting formation fluids.

[0023] The production manifold system is used for the transportation of hydraulic power fluid and the lifting and transportation of formation produced fluid.

[0024] The ground power pump station is used to pressurize the power fluid to generate hydraulic power fluid, and to separate the lifted formation produced fluid.

[0025] As a further embodiment of the present invention, the horizontal well twin-screw fluid production system further includes a fluid storage tank for storing power fluid.

[0026] As a further embodiment of the present invention, the horizontal well twin-screw fluid production system further includes a control system, which is used to control the liquid pressure difference, the flow rate and direction of the liquid in the pipeline, wherein the liquid is a power fluid, a hydraulic power fluid, or a formation produced fluid.

[0027] As a further aspect of the present invention, the downhole rod and tubing pump system includes a screw pump and a screw motor;

[0028] The production manifold system includes production hydraulic lines, central sub-pipe hydraulic lines, drainage lines, and production sleeves; wherein, the production sleeves contain production oil pipes, power hydraulic lines, connecting lines, and conversion joints; the pipelines in the production manifold system are also equipped with valves;

[0029] The ground power pump station includes an electric three-plunger pump and an oil-gas-liquid separator.

[0030] The storage tank is connected to the power hydraulic line via the production hydraulic line. The production hydraulic line is connected to an electric three-plunger pump. The power hydraulic line is connected to the connecting line via a conversion joint. The connecting line is connected to a screw motor.

[0031] The screw motor includes a bypass valve assembly (including a bypass valve), a screw motor assembly (screw motor stator and screw motor rotor), a universal joint assembly (including a universal joint), and a drive shaft assembly (including a second drive shaft).

[0032] The bypass valve of the screw motor is connected to a non-magnetic drill rod, and the non-magnetic drill rod is connected to a lateral displacement gauge, which is used to detect lateral displacement during the drilling process.

[0033] The screw motor rotor is connected to the second drive shaft via a universal joint. The second drive shaft is connected to the drill bit, which is used for drilling operations. During operation, the screw motor assembly rotates, and the rotational speed and torque are transmitted to the drill bit via the universal joint and the second drive shaft, which is converted into the mechanical energy of the drill bit rotation, thereby realizing drilling operations. Moreover, the non-magnetic drill rod does not rotate, only the drill bit rotates, which can reduce the wear and breakage of the non-magnetic drill rod.

[0034] The power fluid in the storage tank is pressurized by an electric three-plunger pump to form hydraulic power fluid. The hydraulic power fluid is transmitted to the screw motor through the production hydraulic pipeline, the power hydraulic pipeline, and the connecting pipeline conversion joint, forming a power fluid-hydraulic power fluid transport route. This provides a pressure difference for the screw motor, driving it to rotate and converting the hydraulic power difference into the mechanical energy of the screw motor. The screw motor then drives the drill bit to perform drilling operations.

[0035] The screw pump includes a first drive shaft and a housing. The first drive shaft is connected to the drive shaft of the screw motor via a coupling. The first drive shaft is connected to a connecting shaft, which is connected to the screw pump rotor. The housing is provided with a screw pump stator, which is formed by pressing a rubber bushing onto the housing. The screw pump stator is a rubber bushing provided on the inner surface of the housing. The screw pump rotor is a chrome-plated screw.

[0036] The screw pump rotor and the screw pump stator form multiple sealed cavities inside the screw pump. The connecting shaft and the housing form a suction cavity. The housing is provided with a suction port, which matches the suction cavity. A suction screen tube is provided at the suction port. The discharge end of the screw pump is provided with a discharge cavity.

[0037] The discharge end of the screw pump is connected to the production oil pipe, the production oil pipe is connected to the central small pipe hydraulic line, the central small pipe hydraulic line is connected to the oil-gas-liquid separator, and the oil-gas-liquid separator is connected to the storage tank through the discharge line.

[0038] The screw pump rotor rotates under the rotation of the screw motor, causing relative rotation between the screw pump stator and the screw pump rotor inside the screw pump. This, in turn, creates a pressure difference in the multiple sealed chambers, continuously drawing in formation produced fluid. The formation produced fluid enters the suction chamber from the suction port through the suction screen pipe, then enters the multiple sealed chambers, and is discharged from the multiple sealed chambers to the discharge chamber. It is then discharged from the discharge end of the screw pump and transmitted to the oil-gas-liquid separation device via the production oil pipe and the central small pipe hydraulic line, forming a transportation route for the formation produced fluid and realizing the lifting of the formation produced fluid.

[0039] Meanwhile, the formation produced fluid is separated by an oil-gas-liquid separator, and the resulting separated fluid flows to the storage tank through a drain pipeline.

[0040] The beneficial effects of this invention are:

[0041] The horizontal well twin-screw fluid production method and system provided by this invention are applicable to horizontal wells and directional wells, with a large oil production depth, high natural pump efficiency, and high utilization efficiency;

[0042] The downhole power fluid transmission of this invention uses a non-rigid connection pipe, which allows for fast lifting and feeding speed, convenient maintenance operations, low initial investment cost, and low overall investment.

[0043] The ground power pump station of the present invention is smaller in volume than the beam pumping unit, and adopts a modular design scheme. The individual modules are small in size and light in weight, which facilitates installation and transportation.

[0044] The components that make up the ground power pump station are not exposed to the air, ensuring the safety of the well site and providing high safety performance;

[0045] In the working circuit of the power fluid, there is no need for a fluid reversing mechanism. It is a unidirectional flow operation with good stability. The pipeline of the power fluid transport line has a long service life and strong stability.

[0046] The liquid flow rate inside the screw pump is stable and is a continuous unidirectional flow, without the liquid flow fluctuation phenomenon of piston pumps. It is suitable for the development of various reservoirs such as sand-producing formations, poorly stable producing fluid layers, and horizontal wells, and has a wide range of applications.

[0047] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 A frame diagram of a horizontal well dual-screw fluid production system according to an embodiment of the present invention is shown;

[0050] Figure 2 A flowchart of a horizontal well twin-screw fluid production method according to an embodiment of the present invention is shown;

[0051] Figure 3 This is a schematic diagram of the screw pump structure;

[0052] Figure 4 This is a schematic diagram of the combination of a screw motor and a drill bit;

[0053] Figure 5 This is a schematic diagram of the cross-sectional structure of a screw pump;

[0054] Figure 6 A schematic diagram of the stator of a screw pump;

[0055] In the picture:

[0056] 1. Production hydraulic pipeline; 2. Production casing; 201. Production oil pipe; 202. Power hydraulic pipeline; 203. Converter joint; 204. Connecting pipeline; 205. Suction screen pipe; 3. Central small pipe hydraulic pipeline; 4. Storage tank; 401. Drainage pipeline; 500. Screw pump; 501. Discharge chamber; 502. Screw pump stator; 503. Screw pump rotor; 504. Connecting shaft; 505. Suction chamber; 506. First drive shaft; 507. Coupling; 508. Housing; 509. Rubber bushing; 600. Screw motor; 601. Inclined gauge; 602. Non-magnetic drill rod; 603. Bypass valve; 604. Universal joint; 605. Second drive shaft; 606. Drill bit; 700. Ground power pump station; 701. Oil-gas-liquid separator; 710. Electric three-plunger pump. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0058] like Figure 1 The diagram shows a framework of a horizontal well twin-screw fluid production system according to an embodiment of the present invention. The horizontal well twin-screw fluid production system includes a downhole tubing pump system, a production manifold system, and a surface power pump station 700.

[0059] The downhole rod-tube pump system is used for drilling operations and for lifting formation fluids.

[0060] The production manifold system is used for the transportation of hydraulic power fluid and the lifting and transportation of formation produced fluid.

[0061] The ground power pump station 700 is used to pressurize the power fluid to generate hydraulic power fluid, and to separate the lifted formation produced fluid.

[0062] In some embodiments of the present invention, the horizontal well twin-screw fluid production system further includes a fluid storage tank 4 for storing power fluid.

[0063] In some embodiments of the present invention, the horizontal well twin-screw fluid production system further includes a control system, which is used to control the liquid pressure difference, the flow rate and the direction of the liquid in the pipeline of the horizontal well twin-screw fluid production system, wherein the liquid is a power fluid, a hydraulic power fluid, or a formation produced fluid;

[0064] The control system includes a pressure gauge, a flow meter, a signal transmitter, an electromagnetic control valve, a pre-programmed controller, and an electromagnetic directional valve.

[0065] The pre-programmed controller is connected to a pressure gauge, flow meter, solenoid control valve, solenoid directional valve, and signal transmitter to control the pressure gauge, flow meter, solenoid control valve, and solenoid directional valve, and can feed back control information to the signal transmitter to control the pressure difference, flow rate, and flow direction of the liquid in the channel.

[0066] In some embodiments of the present invention, the downhole rod and tubing pump system includes a screw pump 500 and a screw motor 600;

[0067] The production manifold system includes a production hydraulic pipeline 1, a central small hydraulic pipeline 3, a drain pipeline 401, and a production sleeve 2; wherein, the production sleeve 2 is provided with a production oil pipe 201, a power hydraulic pipeline 202, a connecting pipeline 203, and a conversion joint 204; the pipelines in the production manifold system are also equipped with valves;

[0068] The ground power pump station 700 includes an electric three-plunger pump 710 and an oil-gas-liquid separator 701;

[0069] The liquid storage tank 4 is connected to the power hydraulic line 202 through the production hydraulic line 1. The production hydraulic line 1 is equipped with an electric three-plunger pump 710. The power hydraulic line 202 is connected to the connecting line 204 through the conversion joint 203. The connecting line 204 is connected to the screw motor 600.

[0070] The screw motor 600 includes a bypass valve assembly (including a bypass valve 603), a screw motor assembly (a screw motor stator and a screw motor rotor), a universal joint assembly (including a universal joint 604), and a drive shaft assembly (including a second drive shaft 605).

[0071] like Figure 4 The diagram shows a combination of a screw motor and a drill bit. The bypass valve 603 of the screw motor 600 is connected to a non-magnetic drill rod 602. The non-magnetic drill rod 602 is connected to a lateral displacement meter 601, which is used to detect lateral displacement during the drilling process.

[0072] The screw motor rotor is connected to the second drive shaft 605 via a universal joint 604. The second drive shaft 605 is connected to the drill bit 606, which is used for drilling operations. During operation, the screw motor assembly rotates, and the rotational speed and torque are transmitted to the drill bit 606 via the universal joint 604 and the second drive shaft 605, which is converted into the mechanical energy of the drill bit 606 rotation, thereby realizing drilling operations. The non-magnetic drill rod 602 does not rotate, only the drill bit 606 rotates, which can reduce the wear and breakage of the non-magnetic drill rod 602.

[0073] The power fluid in the storage tank 4 is pressurized by the electric three-plunger pump 710 to form hydraulic power fluid. The hydraulic power fluid is transmitted to the screw motor 600 through the production hydraulic pipeline 1, the power hydraulic pipeline 202, and the connecting pipeline 204, forming a power fluid-hydraulic power fluid transport route. This provides a pressure difference for the screw motor 600, driving the screw motor 600 to rotate and converting the hydraulic power difference into the mechanical energy of the screw motor 600. The screw motor 600 then drives the drill bit 606 to perform drilling operations.

[0074] like Figure 3 As shown, the screw pump 500 includes a first drive shaft 506 and a housing 508. The first drive shaft 506 is connected to the drive shaft of the screw motor 600 via a coupling 507. A connecting shaft 504 is connected to the first drive shaft 506, and the connecting shaft 504 is connected to the screw pump rotor 503. A screw pump stator 502 is provided on the housing 508. The screw pump stator 502 is formed by pressing a rubber bushing 509 onto the housing 508. Wherein, as... Figure 5 As shown, the screw pump stator 502 is a rubber bushing 509 provided on the inner surface of the housing 508, and the screw pump rotor 503 is a chrome-plated screw. See details... Figure 6 ;

[0075] The screw pump rotor 503 and the screw pump stator 502 form multiple sealed cavities inside the screw pump 500 (see details). Figure 5 (The white area), the connecting shaft 504 and the housing 508 form a suction chamber 505, the housing 508 is provided with a suction port, the suction port matches the suction chamber 505, a suction screen tube 205 is provided at the suction port, and the discharge end of the screw pump 500 is provided with a discharge chamber 501;

[0076] The discharge end of the screw pump 500 is connected to the production oil pipe 201, the production oil pipe 201 is connected to the central small pipe hydraulic line 3, the central small pipe hydraulic line 3 is connected to the oil-gas-liquid separator 701, and the oil-gas-liquid separator 701 is connected to the liquid storage tank 4 through the drain line 401.

[0077] The screw pump rotor 503 rotates under the rotation of the screw motor 600, causing relative rotation between the screw pump stator 502 and the screw pump rotor 503 within the screw pump 500. This, in turn, creates a pressure difference in the multiple sealed chambers, continuously drawing in formation produced fluid. The formation produced fluid enters the suction chamber 505 through the suction screen pipe 205 from the suction port, then enters the multiple sealed chambers, and is discharged from the multiple sealed chambers to the discharge chamber 501. It is then discharged from the discharge end of the screw pump 500 and transmitted to the oil-gas-liquid separator 701 via the production oil pipe 201 and the central small pipe hydraulic line 3, forming a transport route for the formation produced fluid and realizing the lifting of the formation produced fluid.

[0078] Meanwhile, the formation produced fluid is separated by the oil-gas-liquid separator 701, and the resulting separated fluid flows to the storage tank 4 through the drain line 401.

[0079] In some embodiments of the present invention, the production manifold system further includes gas production pipelines, such as casing gas pipelines and coalbed methane production channels, which are used to transport gas generated after separation of formation produced liquid and coal gas produced from coalbed methane.

[0080] like Figure 2 The flowchart shown is a flow chart of a horizontal well twin-screw fluid production method according to an embodiment of the present invention. The horizontal well twin-screw fluid production method includes:

[0081] Drilling operation: The power fluid is pressurized to form hydraulic power fluid, which is transmitted to the screw motor 600 through the hydraulic power fluid pipeline and provides a pressure difference to drive the screw motor 600 to rotate, thereby driving the drill bit 606 to perform drilling operations;

[0082] Lifting and separation of formation produced fluid: The screw pump 500 rotates under the rotation of the screw motor 600, which causes a pressure difference to be generated in multiple sealed chambers inside the screw pump 500. The formation produced fluid is continuously drawn in and transferred to the surface through the lifting pipeline under the action of the pressure difference. After separation, the resulting separated fluid is a new kinetic fluid.

[0083] Cycle: The process of continuously repeating the "drilling operation" and "lifting and separating formation produced fluids" operations.

[0084] In some embodiments of the present invention, the horizontal well twin-screw fluid production method includes:

[0085] Drilling operation: The power fluid in the storage tank 4 is pressurized by the electric three-plunger pump 710 to form hydraulic power fluid. The hydraulic power fluid is transmitted to the screw motor 600 through the production hydraulic line 1, the power hydraulic line 202, and the connecting line 204, and provides a pressure difference to the screw motor 600, driving the screw motor 600 to rotate. The hydraulic power difference is converted into mechanical energy of the screw motor 600, and the screw motor 600 drives the drill bit 606 to perform drilling operations.

[0086] Lifting and separation of formation produced fluid: The screw pump 500 rotates under the rotation of the screw motor 600, causing relative rotation between the screw pump stator 502 and the screw pump rotor 503, which in turn creates a pressure difference in multiple sealed chambers within the screw pump 500, continuously drawing in and lifting the formation produced fluid. The formation produced fluid enters the suction chamber 505 from the suction port through the suction screen pipe 205, then enters multiple sealed chambers, and is discharged from the multiple sealed chambers to the discharge chamber 501, and discharged from the discharge end of the screw pump 500. It is then lifted to the oil-gas-liquid separator 701 via the production oil pipe 201 and the central small pipe hydraulic line 3, forming a transport route for the formation produced fluid and realizing the lifting of the formation produced fluid. The formation produced fluid lifted to the surface is separated by the oil-gas-liquid separator 701, and the resulting separated liquid flows to the storage tank 4 through the discharge pipe 401 to be stored as new power fluid.

[0087] Cycle: The continuous cycle of drilling operations and formation fluid lifting and separation operations forms a twin-screw fluid production lifting system.

[0088] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A horizontal well twin-screw fluid production method, characterized in that, include: Drilling operation: The power fluid is pressurized to form hydraulic power fluid, which is transmitted to the screw motor (600) through the production hydraulic pipeline (1), the power hydraulic pipeline (202), and the connecting pipeline (204), and provides a pressure difference for the screw motor (600) to drive the screw motor (600) to rotate, thereby driving the drill bit (606) to perform drilling operation; The screw pump (500) includes a first drive shaft (506) and a housing (508). The first drive shaft (506) is connected to the drive shaft of the screw motor (600) via a coupling (507). A connecting shaft (504) is connected to the first drive shaft (506), and the connecting shaft (504) is connected to the screw pump rotor (503). The screw pump rotor (503) and the screw pump stator (502) form multiple sealed cavities inside the screw pump (500). The connecting shaft (504) and the housing (508) form a suction chamber (505). The housing (508) is provided with a suction port, which matches the suction chamber (505). A suction screen (205) is provided at the suction port. The discharge end of the screw pump (500) is provided with a discharge chamber (501). The discharge end of the screw pump (500) is connected to the production oil pipe (201). The production oil pipe (201) is connected to the central small pipe hydraulic line (3). Lifting and separation of formation produced fluid: The screw pump (500) rotates under the rotation of the screw motor (600), which causes a pressure difference to be generated in multiple sealed chambers in the screw pump (500), continuously sucking in formation produced fluid. The formation produced fluid enters the screw pump (500) through the suction screen pipe (205), then enters multiple sealed chambers, and is discharged from multiple sealed chambers to the discharge chamber (501). It is discharged from the discharge end of the screw pump (500) and, under the action of the pressure difference, is transmitted to the ground through the production oil pipe (201) and the central small pipe hydraulic line (3). After separation, the resulting separated fluid is a new power fluid. Cycle: The process of continuously repeating the "drilling operation" and "lifting and separating formation produced fluids" operations; In the working circuit of the power fluid, there is no need for a fluid reversing mechanism, it is a unidirectional flow operation, and has good stability; The liquid flow rate inside a screw pump is stable and is a continuous unidirectional flow, without the flow fluctuation phenomenon seen in piston pumps.

2. The horizontal well twin-screw fluid production method according to claim 1, characterized in that, The pressurization of the power fluid includes: the power fluid being transmitted to an electric three-plunger pump (710) and pressurized by the electric three-plunger pump (710).

3. The horizontal well twin-screw fluid production method according to any one of claims 1-2, characterized in that, The separation of the formation produced fluid includes: the formation produced fluid is separated by an oil-gas-liquid separator (701).

4. A horizontal well twin-screw fluid production system, characterized in that, The method for implementing the fluid production method according to any one of claims 1-3 includes a downhole rod and tubing pump system, a production manifold system, and a surface power pump station (700). The downhole rod-tube pump system is used for drilling operations and for lifting formation fluids. The production manifold system is used for the transportation of hydraulic power fluid and the lifting and transportation of formation produced fluid. The ground power pump station (700) is used to pressurize the power fluid to generate hydraulic power fluid and to separate the lifted formation produced fluid.

5. The horizontal well twin-screw fluid production system according to claim 4, characterized in that, It also includes a storage tank (4) for storing power fluid.

6. The horizontal well twin-screw fluid production system according to claim 4 or 5, characterized in that, It also includes a control system, which is used to control the liquid pressure difference, the flow rate and direction of the liquid in the pipeline, wherein the liquid is a power fluid, a hydraulic power fluid, or a formation produced fluid.

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