Horizontal well liquid drainage system, method and device, storage medium and electronic equipment

Abstract

The invention provides a horizontal well liquid drainage system, method and device, a storage medium and electronic equipment, and belongs to the technical field of oil and gas development. The horizontal well liquid drainage system comprises an oil pipe, the oil pipe is arranged in a horizontal well, one end of the oil pipe is connected with a well mouth of the horizontal well, the other end of the oil pipe extends to a horizontal well section of the horizontal well in the underground direction along the horizontal well, and an opening is formed in the end, close to the horizontal well section, of the oil pipe; the dragging force device is arranged in the oil pipe, and the outer side wall of the dragging force device is attached to the inner side wall of the oil pipe; and the control device is used for controlling the towing device to reciprocate in the oil pipe. The control device is used for controlling the towing force device to move, so that liquid in the horizontal well is lifted from a lower position to a higher position, liquid drainage in a horizontal well section in a mechanical lifting mode is achieved, liquid drainage is more sufficient, and the production requirements of oil and gas well production in the later period are met.

Description

Technical Field

[0001] This invention relates to the field of oil and gas development technology, and more specifically to a horizontal well drainage system, a horizontal well drainage method, a horizontal well drainage device, a machine-readable storage medium, and an electronic device. Background Technology

[0002] With the development of tight oil and gas and unconventional oil and gas, a large number of large-scale fractured horizontal wells are deployed for oil and gas development and production. During the fracturing of horizontal wells, after the formation pressure decreases, the fluid level in the wellbore gradually decreases, and it is urgent to drain oil, water, etc. from the horizontal well section to reduce the bottom hole pressure drop and increase the production pressure differential.

[0003] The current possible technical solutions are mainly: to run tubing or coiled tubing deeper into the horizontal well section to improve the drainage effect in the horizontal well section, or to add foaming agents to the horizontal well section to reduce pressure loss in the horizontal well section and achieve stable production by reducing bottom hole pressure.

[0004] However, these methods all rely on the energy of the oil and gas well itself, making it difficult to carry out mechanical lifting in horizontal well sections and meet the production needs of oil and gas wells in the later stages of production. Summary of the Invention

[0005] The purpose of this invention is to provide a horizontal well drainage system, a horizontal well drainage method, a horizontal well drainage device, a machine-readable storage medium, and an electronic device. The horizontal well drainage system uses a control device to control the movement of a drag force device to lift the liquid in the horizontal well from a lower position to a higher position, realizing drainage in the horizontal well section by mechanical lifting, making the drainage more complete and helping to meet the production needs in the later stages of oil and gas well production.

[0006] To achieve the above objectives, a first aspect of the present invention provides a horizontal well fluid drainage system, comprising:

[0007] The tubing is installed inside the horizontal well. One end of the tubing is connected to the wellhead of the horizontal well, and the other end extends underground along the horizontal well to the horizontal section of the horizontal well. An opening is provided at the end of the tubing near the horizontal section.

[0008] A towing device is disposed in the oil pipe, and the outer side wall of the towing device is in contact with the inner side wall of the oil pipe.

[0009] A control device is provided for controlling the reciprocating motion of the dragging device within the oil pipe.

[0010] In this embodiment, the control device includes a power transmission component, a first power drive component, a second power drive component, and a power control component. One end of the power transmission component is connected to the towing device, and the other end is connected to the first power drive component and the second drive component, respectively. The power control component is used to control the first power drive component to output a driving force and to control the second drive component to output a pulling force. The power transmission component is used to transmit the driving force and the pulling force to the towing device so that the towing device reciprocates within the oil pipe.

[0011] In this embodiment, the dragging device includes a plunger and a fluid dragging assembly. The plunger is close to the wellhead of the horizontal well. The plunger and the fluid dragging assembly are connected, forming a cavity between them. The outer walls of both the plunger and the fluid dragging assembly are in contact with the inner wall of the tubing. A fluid transmission channel is provided in the plunger. One end of the fluid transmission channel is connected to the power transmission assembly, and the other end communicates with the cavity. The first power drive assembly is used to output thrust by outputting fluid.

[0012] In this embodiment, the power transmission component includes a power transmission cable. One end of the power transmission cable is connected to the fluid transmission channel, and the other end is connected to the second power drive component. The power transmission cable includes an outer protective armor, a power transmission pipe, and multiple steel wire cables. The multiple steel wire cables are arranged around the power transmission pipe. The outer protective armor wraps around the power transmission pipe and the multiple steel wire cables. A fiber structure is filled between any two of the multiple steel wire cables, the power transmission pipe, and the outer protective armor. The power transmission pipe is connected to the first power drive component.

[0013] In this embodiment of the application, the second power drive assembly includes a drum, the power transmission cable is wound on the drum, and the power control assembly is used to control the rotation of the drum to output tension.

[0014] In this embodiment of the application, the power transmission assembly further includes a bracket and a guide wheel. The guide wheel is disposed on the bracket, and the bracket is disposed near the wellhead of the horizontal well so that the guide wheel is located above the wellhead of the horizontal well. One end of the power transmission cable is guided through the guide wheel into the tubing and connected to the dragging device.

[0015] In this embodiment of the application, a terminal check device is provided at the end of the tubing, and the end of the tubing is the end of the tubing close to the horizontal well section.

[0016] In this embodiment of the application, the oil pipe has sieve holes.

[0017] A second aspect of this application discloses a horizontal well fluid drainage method, applied to the aforementioned horizontal well fluid drainage system, the horizontal well fluid drainage method comprising:

[0018] The control device controls the dragging device to move to the end of the tubing, where the end of the tubing is the end of the tubing closest to the horizontal well section;

[0019] The control device controls the dragging device to move toward the wellhead of the horizontal well until the dragging device moves to a preset position.

[0020] In this embodiment of the application, the control device includes a power transmission component, a first power drive component, a second power drive component, and a power control component;

[0021] The control device controls the movement of the dragging device to the end of the oil pipe, including:

[0022] The towing device moves downward along the oil pipe under the action of gravity. The power control component determines whether the towing device has moved to a preset first position. When it is determined that the towing device has moved to the preset first position, the first power drive component is controlled to output a driving force, so that the towing device moves along the horizontal section of the oil pipe until the end of the oil pipe.

[0023] The step of controlling the dragging device to move towards the wellhead of the horizontal well, until the dragging device moves to a preset position, includes:

[0024] The power control component controls the second power transmission component to output pulling force, causing the pulling device to move toward the wellhead of the horizontal well until the pulling device moves to a preset position.

[0025] A third aspect of this application provides a horizontal well drainage device, applied to the aforementioned horizontal well drainage system, the horizontal well drainage device comprising:

[0026] The first control module is used to enable the dragging device controlled by the control device to move to the end of the tubing, wherein the end of the tubing is the end of the tubing near the horizontal well section;

[0027] The second control module is used to enable the control device to control the dragging device to move toward the wellhead of the horizontal well until the dragging device moves to a preset position.

[0028] A fourth aspect of this application provides an electronic device, the electronic device comprising:

[0029] At least one processor;

[0030] A memory connected to the at least one processor;

[0031] The memory stores instructions that can be executed by the at least one processor, which implements the above-described horizontal well drainage method by executing the instructions stored in the memory.

[0032] A fifth aspect of this application provides a machine-readable storage medium storing instructions that, when executed by a processor, configure the processor to perform the above-described horizontal well drainage method.

[0033] The above technical solution involves installing tubing within the horizontal well, with one end connected to the wellhead and the other end extending underground to the horizontal section of the well. An opening is provided at the end of the tubing near the horizontal section. A dragging device is installed within the tubing, its outer wall fitting against the inner wall of the tubing. A control device controls the reciprocating movement of the dragging device within the tubing. Liquid in the horizontal well flows into the tubing through the opening. The dragging device is first moved to the end of the tubing, then moved towards the wellhead. During this movement, the liquid in the horizontal section is discharged. This system utilizes the control device to move the dragging device, lifting the liquid in the horizontal well from a lower to a higher position. This achieves mechanical lifting for liquid discharge in the horizontal section, resulting in more thorough discharge and meeting the production needs of the later stages of oil and gas well production. It can achieve single-cycle full-bore drainage operation, effectively realizing drainage of horizontal well sections.

[0034] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0035] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0036] Figure 1 The schematic diagram illustrates a structural schematic of a horizontal well drainage system according to an embodiment of this application;

[0037] Figure 2 This schematic diagram illustrates the implementation status of fluid drainage in a horizontal well section according to an embodiment of this application.

[0038] Figure 3 A schematic diagram of the structure of a power transmission cable according to an embodiment of this application is shown.

[0039] Figure 4The schematic diagram illustrates a flow chart of a horizontal well drainage method according to an embodiment of this application;

[0040] Figure 5 The schematic diagram illustrates a structural schematic of a horizontal well drainage device according to an embodiment of this application;

[0041] Figure 6 The diagram illustrates the internal structure of a computer device according to an embodiment of this application.

[0042] Explanation of reference numerals in the attached figures

[0043] 1-First power drive assembly; 2-Ground control cabinet; 3-Motor; 4-Power cable; 5-Drum; 6-Power fluid connection pipe; 7-Flexible power transmission cable; 7-1-Outer protective armor; 7-2-Fiber structure; 7-3-Steel wire cable; 7-4-Power transmission pipe; 8-Support; 9-Guide wheel; 10-Wellhead; 11-Casing; 12-Tubing; 13-Adaptive plunger; 14-Power transmission connection pipe; 15-Fluid drag assembly; 16-Screw pipe; 17-Terminal check valve; 18-Horizontal well fluid; 410-First control module; 420-Second control module; A01-Processor; A02-Network interface; A03-Internal memory; A04-Display screen; A05-Input device; A06-Non-volatile storage medium; B01-Operating system; B02-Computer program. Detailed Implementation

[0044] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0045] It should be noted that the acquisition, transmission, storage, use, and processing of data in the technical solution of this application all comply with the relevant provisions of national laws and regulations. In the embodiments of this application, certain existing industry solutions such as software, components, and models may be mentioned. These should be considered exemplary, intended only to illustrate the feasibility of implementing the technical solution of this application, and do not imply that the applicant has already used or necessarily used such solutions.

[0046] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0047] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0048] Please refer to Figure 1 , Figure 1 This illustration schematically shows a structural diagram of a horizontal well fluid drainage system according to an embodiment of the present application. This embodiment provides a horizontal well fluid drainage system, including:

[0049] The tubing 12 is installed inside the horizontal well. One end of the tubing 12 is connected to the wellhead 10 of the horizontal well, and the other end extends underground along the horizontal well to the horizontal section of the horizontal well. An opening is provided at the end of the tubing 12 near the horizontal section.

[0050] A towing device is disposed in the oil pipe 12, and the outer side wall of the towing device is in contact with the inner side wall of the oil pipe 12.

[0051] A control device is provided for controlling the reciprocating motion of the dragging device within the oil pipe 12.

[0052] In this embodiment, the tubing 12 can be a conventional tubing or a continuous tubing. Conventional tubing can be a steel pipe composed of one or more connected sections, while continuous tubing is a long, seamless tubing 12 made of rolled steel strip. The tubing 12 can be installed inside the casing 11 of a horizontal well, with one end connected to the wellhead 10 and the other end extending to the horizontal section of the well. An opening is provided at the end of the tubing 12 near the horizontal section to allow fluid from the horizontal well to flow into the tubing 12. The outer wall of the dragging device is in contact with the inner wall of the tubing 12, allowing the dragging device to reciprocate along the direction of the tubing 12 under the control of the control device. The control device can be located on the ground, specifically a surface control cabinet 2. The surface control cabinet 2 houses the control device, which includes a computer, a programmable logic controller (PLC), etc. During fluid drainage operations, the control device controls the dragging device to move towards the end of the tubing 12, and then controls the dragging device to move towards the opening of the horizontal well, discharging the fluid from the wellbore and thus reducing the bottom hole pressure.

[0053] In the above implementation process, an oil pipe 12 is installed inside the horizontal well. One end of the oil pipe 12 is connected to the wellhead 10 of the horizontal well, and the other end extends underground along the horizontal well to the horizontal section of the horizontal well. An opening is provided at the end of the oil pipe 12 near the horizontal section. A dragging device is installed in the oil pipe 12, and the outer wall of the dragging device is in contact with the inner wall of the oil pipe 12. A control device is used to control the reciprocating motion of the dragging device inside the oil pipe 12. Fluid in the horizontal well flows into tubing 12 through the opening. First, the dragging device is controlled to move to the end of tubing 12, then it is controlled to move towards the wellhead 10 of the horizontal well. During this movement, the fluid in the horizontal well section is discharged. This system uses a control device to move the dragging device, lifting the fluid in the horizontal well from a lower position to a higher position. This achieves fluid discharge in the horizontal well section through mechanical lifting, resulting in more thorough discharge and meeting the production needs of the later stages of oil and gas well production. It can achieve full-bore fluid discharge operation in a single cycle, effectively realizing fluid discharge in the horizontal well section.

[0054] In some embodiments, the control device includes a power transmission component, a first power drive component 1, a second power drive component, and a power control component. One end of the power transmission component is connected to the towing device, and the other end is connected to the first power drive component 1 and the second drive component, respectively. The power control component is used to control the first power drive component 1 to output a driving force and to control the second drive component to output a pulling force. The power transmission component is used to transmit the driving force and the pulling force to the towing device so that the towing device reciprocates within the oil pipe 12.

[0055] In this embodiment, the first power drive component 1 can provide a constant-pressure compressed fluid. The fluid can be a gas that does not react violently or explode with downhole oil and gas, such as carbon dioxide (CO2), nitrogen (N2), or natural gas, or a liquid such as water or oil. The power transmission component can be a flexible pipeline. The power control component controls the output fluid of the first power drive component 1. The fluid output by the first power drive component 1 is transmitted to the dragging device through the power transmission component, generating a driving force that propels the dragging device to move in the horizontal section. The power control component can also control the output pull force of the second drive component. The power transmission component transmits the pull force to the dragging device to provide pull force, thereby enabling the dragging device to move upward in the tubing 12 under the action of the pull force.

[0056] By setting up a power transmission component, a first power drive component 1, a second power drive component, and a power control component, the power control component controls the first power drive component 1 to output a driving force and controls the second power drive component to output a pulling force. The power transmission component is used to transmit the driving force and the pulling force to the towing device, which can realize segmented motion control of the towing device, so that the towing device can completely reciprocate within the oil pipe 12.

[0057] In some embodiments, the dragging device includes a plunger and a fluid dragging assembly 15. The plunger is close to the wellhead 10 of the horizontal well. The plunger and the fluid dragging assembly 15 are connected, forming a cavity between them. The outer walls of both the plunger and the fluid dragging assembly 15 are in contact with the inner wall of the tubing 12. A fluid transmission channel is provided in the plunger. One end of the fluid transmission channel is connected to the power transmission assembly, and the other end communicates with the cavity. The first power drive assembly 1 is used to output a driving force to propel the dragging device by outputting fluid.

[0058] In this embodiment, the plunger can be an adaptive plunger 13, capable of automatically adjusting its working state according to changes in the working environment (such as pressure, temperature, media characteristics, etc.), including the fitting clearance between the plunger and the cylinder, sealing performance, etc., to ensure that the equipment always maintains efficient and stable operation. The plunger is used to reciprocate within the oil pipe 12, achieving liquid discharge by changing the volume within the oil pipe 12. The fluid dragging assembly 15 is a device that can generate traction force on the plunger, located below the plunger, used to provide a downward traction force to the plunger. Under the action of the traction force and the pulling force provided by the second power drive assembly, the plunger can move in the vertical direction. The fluid transmitted by the power transmission assembly can be input into the cavity through the fluid transmission channel in the plunger, thereby providing a driving force to the fluid dragging assembly 15. The fluid dragging assembly 15 moves under the action of the driving force, driving the plunger to move in the horizontal section.

[0059] By incorporating a plunger and a fluid dragging assembly 15 into the dragging device, with the plunger positioned near the wellhead 10 of the horizontal well and connected to the fluid dragging assembly 15 to form a cavity, the fluid dragging assembly 15 provides a downward traction force to the plunger, causing it to move downwards. Fluid transmitted by the power transmission assembly can be input into the cavity through the fluid transmission channel in the plunger, thereby providing a driving force to the fluid dragging assembly 15. The fluid dragging assembly 15 moves under the driving force, driving the plunger to move in the horizontal section. Therefore, the movement control of the dragging device in the horizontal section of the tubing 12 can be achieved by controlling the fluid output of the first power drive assembly 1, making control simpler and more convenient.

[0060] In some embodiments, the power transmission assembly includes a power transmission cable, one end of which is connected to the fluid transmission channel and the other end of which is connected to the second power drive assembly. The power transmission cable includes an outer protective armor 7-1, a power transmission tube 7-4, and multiple steel wire cables 7-3. The multiple steel wire cables 7-3 are arranged around the power transmission tube 7-4. The outer protective armor 7-1 wraps around the power transmission tube 7-4 and the multiple steel wire cables 7-3. A fiber structure 7-2 is filled between any two of the multiple steel wire cables 7-3, the power transmission tube 7-4, and the outer protective armor 7-1. The power transmission tube 7-4 is connected to the first power drive assembly 1.

[0061] In this embodiment, please refer to Figure 3 , Figure 3 A schematic diagram of the structure of a power transmission cable according to an embodiment of this application is shown. The power transmission cable can be a flexible power transmission cable 7, and the power transmission pipe 7-4 forms a power transmission pipe 7-4 path. The fluid output from the first power drive component 1 flows into the cavity in the drag device through the power transmission pipe 7-4 path. The steel wire cable 7-3 refers to a steel wire rope, a rope-like product made of multiple twisted steel wires. It has high strength and toughness, and can withstand greater tensile force, so that the power transmission cable can transmit greater tensile force. The fiber structure 7-2 can act as a buffer. When the power transmission cable is subjected to external impact or vibration due to internal power transmission, the fiber structure 7-2 can absorb and disperse this energy, thereby ensuring that the power transmission pipe 7-4 can transmit fluid normally. The outer protective armor 7-1 is a protective outer structure used to protect internal objects or structures from damage by various harmful external factors (such as physical impact, chemical corrosion, abrasion, high temperature, etc.), thereby ensuring that the power transmission pipe 7-4 is protected from damage by various harmful external factors and improving the service life of the power transmission cable.

[0062] In some embodiments, the second power drive assembly includes a drum 5, the power transmission cable is wound on the drum 5, and the power control assembly is used to control the rotation of the drum 5 to output tension.

[0063] In this embodiment, the power transmission cable is wound on the drum 5, and a motor 3 can be installed on the drum 5. When going down into the well, the power control component controls the motor 3 to work and release the power transmission cable. The dragging device is lowered to the bottom of the well under the action of gravity. Conversely, during the upward process, the power control component controls the motor 3 to work and wind the power transmission cable released to the tubing 12 onto the drum 5, that is, to provide an upward pulling force to the dragging device.

[0064] By setting up the drum 5, the power control component can control the drum 5 to output tension, thereby making it easier to control the power transmission cable.

[0065] In some embodiments, the power transmission assembly further includes a bracket 8 and a guide wheel 9. The guide wheel 9 is disposed on the bracket 8, and the bracket 8 is disposed near the wellhead 10 of the horizontal well, so that the guide wheel 9 is located above the wellhead 10 of the horizontal well. One end of the power transmission cable is guided through the guide wheel 9 into the tubing 12 and connected to the dragging device.

[0066] In this embodiment, the guide wheel 9 can guide the power transmission cable to be centered with the wellhead 10, thereby reducing wear and stress damage to the power transmission cable and further improving its service life.

[0067] In some embodiments, a terminal check device 17 is provided at the end of the tubing 12, and the end of the tubing 12 is the end of the tubing 12 near the horizontal well section.

[0068] In this embodiment, the aforementioned terminal check device 17 is disposed within the tubing 12. It can be fitted against the inner wall of the tubing 12 or be smaller than the diameter of the tubing 12. The terminal check device 17 is a device used to control the unidirectional flow of fluid in the tubing 12, preventing reverse flow of fluid to ensure the normal operation and safety of the system. Simultaneously, due to the action of the terminal check device 17, the aforementioned dragging device will not extend beyond the position of the tubing 12, thereby ensuring the normal operation of the horizontal well drainage system.

[0069] In some embodiments, the oil pipe 12 is provided with a sieve.

[0070] In this embodiment, the screen holes can be installed on the pipe wall, allowing the horizontal well fluid 18 to flow into the tubing 12 through the screen holes, thus filtering impurities in the horizontal well fluid 18. The screen holes can be a downhole screen 16 installed on the tubing 12. The screen holes can be located near the end of the tubing 12. During the movement of the dragging device towards the end of the tubing 12, as the dragging device passes through the screen holes, the fluid in the cavity can flow out of the tubing 12. After the fluid is injected into the well, it can increase formation energy, thereby allowing the dragging device to move towards the wellhead 10 with less pulling force during the fluid discharge process, facilitating rapid fluid discharge.

[0071] Please refer to Figure 4 , Figure 4 The schematic diagram illustrates a flow chart of a horizontal well fluid drainage method according to an embodiment of this application. This embodiment provides a horizontal well fluid drainage method applied to the aforementioned horizontal well fluid drainage system, the method comprising the following steps:

[0072] Step 210: The control device controls the dragging device to move to the end of the tubing 12, the end of the tubing 12 being the end of the tubing 12 closest to the horizontal well section;

[0073] In this embodiment, please refer to Figure 2 When draining fluid, the control drag device is first moved to the end of the tubing 12. At this time, the cavity in the tubing 12 is at its maximum, and there is a large amount of horizontal well fluid 18 in the cavity.

[0074] In some embodiments, the control device includes a power transmission component, a first power drive component 1, a second power drive component, and a power control component;

[0075] The process of controlling the drag device to move to the end of the oil pipe 12 by the control device includes the following steps:

[0076] The towing device moves downward along the oil pipe 12 under the action of gravity. The power control component determines whether the towing device has moved to a preset first position. When it is determined that the towing device has moved to the preset first position, the first power drive component is controlled to output a driving force, so that the towing device moves along the horizontal section of the oil pipe 12 until the end of the oil pipe 12.

[0077] In this embodiment, the aforementioned preset first position can be pre-set, or it can be set at the connection between the vertical and horizontal sections. The determination of whether the towing device has moved to the preset first position can be achieved by real-time detection of the tension value received by the power transmission component. When the tension value is less than a threshold, it indicates that the towing device has moved to the preset first position; otherwise, it has not yet moved to the preset first position. The aforementioned threshold can be pre-set according to actual conditions. When the towing device moves to the preset first position, it cannot continue to move towards the horizontal section. At this time, the power control component needs to control the first power drive component to output a driving force, so that the towing device can continue to move along the horizontal section of the oil pipe 12 under the action of the driving force until the end of the oil pipe 12, thereby ensuring that the towing device can accurately reach the end of the oil pipe 12.

[0078] Step 220: The control device controls the dragging device to move toward the wellhead 10 of the horizontal well until the dragging device moves to the preset position.

[0079] In this embodiment, after the dragging device reaches the end of the tubing 12, the dragging device is controlled to move toward the wellhead 10 of the horizontal well until the dragging device moves to a preset position. The preset position can be set in advance according to actual needs. This position is generally close to the wellhead 10 so as to completely remove the fluid in the tubing 12.

[0080] Accordingly, when the control device includes a power transmission assembly, a first power drive assembly 1, a second power drive assembly, and a power control assembly, the step of controlling the dragging device to move towards the wellhead 10 of the horizontal well until the dragging device moves to a preset position includes:

[0081] The power control component controls the second power transmission component to output pulling force, causing the pulling device to move toward the wellhead 10 of the horizontal well until the pulling device moves to a preset position.

[0082] In this embodiment, by controlling the output of the second power transmission component, the pulling device can move towards the wellhead 10 of the horizontal well under the action of the pulling force until the pulling device moves to a preset position to remove the fluid in the tubing 12.

[0083] It should be noted that, in actual implementation, by continuously repeating steps 210 and 220, the fluid in the horizontal section can be continuously discharged, so as to completely discharge the fluid in the horizontal well.

[0084] In the above-described process, the control device moves the dragging device to the end of the tubing 12, which is the end of the tubing 12 closest to the horizontal well section. The control device then moves the dragging device towards the wellhead 10 of the horizontal well until it reaches a preset position. Liquid in the horizontal well flows into the tubing 12 through its opening. First, the dragging device is moved to the end of the tubing 12, then it moves towards the wellhead 10. During this movement, the liquid in the horizontal well section is discharged. This system utilizes the control device to lift the liquid in the horizontal well from a lower position to a higher position, achieving mechanical lifting for fluid discharge in the horizontal well section. This ensures more thorough fluid discharge, which is beneficial for the later stages of oil and gas well production. It can achieve full-bore fluid discharge operation in a single cycle, effectively realizing fluid discharge in the horizontal well section.

[0085] The following examples illustrate the solution; please refer to them. Figure 1 and Figure 2 , Figure 2 This schematic diagram illustrates the implementation status of fluid drainage in a horizontal well section according to an embodiment of this application; Figure 2 In the diagram, (a) shows the downhole adaptive plunger 13 at the bottom of the tubing 12; and (b) shows the downhole adaptive plunger 13 raised to the wellhead position 10.

[0086] The horizontal well fluid drainage system includes a first power drive assembly 1, a surface control cabinet 2, a motor 3, a power cable 4, a drum 5, a power fluid connection pipe 6, a power transmission cable, a support 8, a guide wheel 9, a wellhead 10, a casing 11, tubing 12, an adaptive plunger 13, a power transmission connection pipe 14, a fluid drag force assembly 15, a downhole screen pipe 16, and a terminal check valve 17. The surface control cabinet 2 contains the control device.

[0087] The flexible power transmission cable 7 is wound on the drum 5. During the descent, the motor 3 releases the flexible power transmission cable 7, which is lowered to the bottom of the well under gravity. Conversely, during the ascent, the motor 3 winds the released flexible power transmission cable 7 back onto the drum 5. The surface control cabinet 2 records parameters such as the descent depth and tension of the flexible power transmission cable 7 on the drum 5, and controls the running direction and parameters of the motor 3, as well as the operation of the first power drive assembly 1. The guide wheel 9 guides the flexible power transmission cable 7 to be centered with the wellhead 10, reducing wear and stress damage. The flexible power transmission cable 7 is sequentially connected to the adaptive plunger 13, the power transmission connection pipe 14, and the fluid drag assembly 15 downhole. The fluid drag assembly 15 is driven by the fluid transmitted through the flexible power transmission cable 7, the adaptive plunger 13, and the power transmission connection pipe 14, and moves unidirectionally towards the bottom of the well. As the fluid drag assembly 15 moves downwards, and both the adaptive plunger 13 and the fluid drag assembly 15 move below the screen pipe 16, the liquid flows through the screen pipe 16 to the left side of the adaptive plunger 13. The fluid drag assembly 15 moves downwards, and the terminal check device 17 prevents it from exceeding the position of the tubing 12. During the drainage process, the motor 3 drives the drum 5 to move, lifting the flexible power transmission cable 7 and driving the adaptive plunger 13 upwards to drain the liquid from the wellbore, reducing the bottom hole pressure. After being lifted to the wellhead 10 to maximize the removal of accumulated liquid from the wellbore, the motor 3 drives the drum 5 to move in the opposite direction, lowering the flexible power transmission cable 7. The adaptive plunger 13 and the fluid drag assembly 15 descend vertically in the wellbore under gravity. During the descent, the ground control cabinet 2 can detect the tension value on the flexible power transmission cable 7 through sensors. When the tension value is less than a threshold, it controls the first power drive assembly 1.

[0088] Figure 1 This is a schematic flowchart of the horizontal well drainage method in the embodiment. It should be understood that, although... Figure 1 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figure 1At least some of the steps in the process may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

[0089] Please refer to Figure 5 , Figure 5 This schematic diagram illustrates the structure of a horizontal well drainage device according to an embodiment of the present application. This embodiment provides a horizontal well drainage device applied to the aforementioned horizontal well drainage system. The horizontal well drainage device includes a first control module 410 and a second control module 420, wherein:

[0090] The first control module 410 is used to control the dragging device to move to the end of the tubing 12, the end of the tubing 12 being the end of the tubing 12 near the horizontal well section;

[0091] The second control module 420 is used to enable the control device to control the dragging device to move toward the wellhead 10 of the horizontal well until the dragging device moves to a preset position.

[0092] The horizontal well drainage method device includes a processor A01 and a memory. The first control module 410 and the second control module 420 are stored in the memory as program units. The processor A01 executes the program units stored in the memory to realize the corresponding functions.

[0093] The processor A01 contains a kernel, which retrieves the corresponding program unit from memory. One or more kernels can be configured, and horizontal well fluid drainage can be achieved by adjusting kernel parameters.

[0094] The memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0095] This invention provides a machine-readable storage medium storing a program that, when executed by processor A01, implements the horizontal well drainage method.

[0096] This invention provides a processor A01 for running a program, wherein the program executes the horizontal well drainage method during runtime.

[0097] In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 6 As shown. The computer device includes a processor A01, a network interface A02, a display screen A04, an input device A05, and a memory (not shown) connected via a system bus. The processor A01 provides computing and control capabilities. The memory includes internal memory A03 and a non-volatile storage medium A06. The non-volatile storage medium A06 stores an operating system B01 and a computer program B02. The internal memory A03 provides an environment for the operation of the operating system B01 and the computer program B02 stored in the non-volatile storage medium A06. The network interface A02 is used for communication with external terminals via a network connection. When the computer program B02 is executed by the processor A01, it implements a horizontal well drainage method. The display screen A04 can be a liquid crystal display screen A04 or an e-ink display screen A04. The input device A05 can be a touch layer covering the display screen A04, or buttons, a trackball, or a touchpad mounted on the computer device casing, or an external keyboard, touchpad, or mouse, etc.

[0098] Those skilled in the art will understand that Figure 6 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0099] In one embodiment, the horizontal well drainage method apparatus provided in this application can be implemented as a computer program BO2, which can be configured as follows: Figure 6 The computer device shown runs on this system. The computer device's memory can store the various program modules that make up the horizontal well drainage method apparatus, for example, Figure 5 The first control module 410 and the second control module 420 are shown. The computer program B02, composed of the various program modules, causes the processor A01 to execute the steps in the horizontal well drainage methods of the various embodiments of this application described in this specification.

[0100] Figure 6 The computer equipment shown can be used as follows Figure 5 The first control module 410 in the horizontal well drainage method apparatus shown executes step 210. The computer equipment can execute step 220 via the second control module 420.

[0101] This application provides an electronic device, comprising: at least one processor A01; and a memory connected to the at least one processor A01; wherein the memory stores instructions executable by the at least one processor A01, and the at least one processor A01 implements the above-described horizontal well drainage method by executing the instructions stored in the memory, applied to the above-described horizontal well drainage system. When the processor A01 executes the instructions, it performs the following steps:

[0102] The control device controls the dragging device to move to the end of the tubing 12, the end of the tubing 12 being the end of the tubing 12 closest to the horizontal well section;

[0103] The control device controls the dragging device to move toward the wellhead 10 of the horizontal well until the dragging device moves to a preset position.

[0104] In one embodiment, the control device includes a power transmission component, a first power drive component 1, a second power drive component, and a power control component;

[0105] The control device controls the towing device to move to the end of the oil pipe 12, including:

[0106] The towing device moves downward along the oil pipe 12 under the action of gravity. The power control component determines whether the towing device has moved to a preset first position. When it is determined that the towing device has moved to the preset first position, the first power drive component is controlled to output a driving force, so that the towing device moves along the horizontal section of the oil pipe 12 until the end of the oil pipe 12.

[0107] The step of controlling the dragging device to move towards the wellhead 10 of the horizontal well, until the dragging device moves to a preset position, includes:

[0108] The power control component controls the second power transmission component to output pulling force, causing the pulling device to move toward the wellhead 10 of the horizontal well until the pulling device moves to a preset position.

[0109] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program BO2 products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program BO2 product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0110] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program B02 products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program B02 instructions. These computer program B02 instructions can be provided to a processor A01 of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor A01 of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0111] These computer program B02 instructions may also be stored in a computer-readable storage medium capable of directing a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0112] These computer program B02 instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable apparatus for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0113] In a typical configuration, a computing device includes one or more processors A01 (CPU), input / output interfaces, network interfaces A02, and memory.

[0114] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0115] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0116] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0117] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A horizontal well drainage system, characterized in that, include: The tubing is installed inside the horizontal well. One end of the tubing is connected to the wellhead of the horizontal well, and the other end extends underground along the horizontal well to the horizontal section of the horizontal well. An opening is provided at the end of the tubing near the horizontal section. A towing device is disposed in the oil pipe, and the outer side wall of the towing device is in contact with the inner side wall of the oil pipe. A control device is provided for controlling the reciprocating motion of the dragging device within the oil pipe.

2. The horizontal well drainage system according to claim 1, characterized in that, The control device includes a power transmission component, a first power drive component, a second power drive component, and a power control component. One end of the power transmission component is connected to the towing device, and the other end is connected to the first power drive component and the second drive component, respectively. The power control component is used to control the first power drive component to output a driving force and to control the second drive component to output a pulling force. The power transmission component is used to transmit the driving force and the pulling force to the towing device so that the towing device reciprocates within the oil pipe.

3. The horizontal well drainage system according to claim 2, characterized in that, The dragging device includes a plunger and a fluid dragging assembly. The plunger is close to the wellhead of the horizontal well. The plunger and the fluid dragging assembly are connected, forming a cavity between them. The outer walls of both the plunger and the fluid dragging assembly are in contact with the inner wall of the tubing. A fluid transmission channel is provided in the plunger. One end of the fluid transmission channel is connected to the power transmission assembly, and the other end communicates with the cavity. The first power drive assembly is used to output thrust by outputting fluid.

4. The horizontal well drainage system according to claim 3, characterized in that, The power transmission component includes a power transmission cable, one end of which is connected to the fluid transmission channel, and the other end is connected to the second power drive component. The power transmission cable includes an outer protective armor, a power transmission tube, and multiple steel wire cables. The multiple steel wire cables are arranged around the power transmission tube. The outer protective armor wraps around the power transmission tube and the multiple steel wire cables. A fiber structure is filled between any two of the multiple steel wire cables, the power transmission tube, and the outer protective armor. The power transmission tube is connected to the first power drive component.

5. The horizontal well drainage system according to claim 4, characterized in that, The second power drive assembly includes a drum, the power transmission cable is wound on the drum, and the power control assembly is used to control the rotation of the drum to output tension.

6. The horizontal well drainage system according to claim 4, characterized in that, The power transmission assembly also includes a bracket and a guide wheel. The guide wheel is mounted on the bracket, which is positioned near the wellhead of the horizontal well so that the guide wheel is located above the wellhead of the horizontal well. One end of the power transmission cable is guided through the guide wheel into the tubing and connected to the drag force device.

7. The horizontal well drainage system according to claim 1, characterized in that, The end of the tubing is equipped with a terminal check device, and the end of the tubing is the end of the tubing closest to the horizontal well section.

8. The horizontal well drainage system according to claim 1, characterized in that, The oil pipe has sieve holes.

9. A method for draining fluid from a horizontal well, characterized in that, The horizontal well drainage system applied to any one of claims 1-8, the horizontal well drainage method comprising: The control device controls the dragging device to move to the end of the tubing, where the end of the tubing is the end of the tubing closest to the horizontal well section; The control device controls the dragging device to move toward the wellhead of the horizontal well until the dragging device moves to a preset position.

10. The horizontal well drainage method according to claim 9, characterized in that, The control device includes a power transmission component, a first power drive component, a second power drive component, and a power control component; The control device controls the movement of the dragging device to the end of the oil pipe, including: The towing device moves downward along the oil pipe under the action of gravity. The power control component determines whether the towing device has moved to a preset first position. When it is determined that the towing device has moved to the preset first position, the first power drive component is controlled to output a driving force, so that the towing device moves along the horizontal section of the oil pipe until the end of the oil pipe. The step of controlling the dragging device to move towards the wellhead of the horizontal well, until the dragging device moves to a preset position, includes: The power control component controls the second power transmission component to output pulling force, causing the pulling device to move toward the wellhead of the horizontal well until the pulling device moves to a preset position.

11. A horizontal well drainage device, characterized in that, The horizontal well drainage system according to any one of claims 1-8, the horizontal well drainage device comprising: The first control module is used to enable the dragging device controlled by the control device to move to the end of the tubing, wherein the end of the tubing is the end of the tubing near the horizontal well section; The second control module is used to enable the control device to control the dragging device to move toward the wellhead of the horizontal well until the dragging device moves to a preset position.

12. An electronic device, characterized in that, The electronic device includes: At least one processor; A memory connected to the at least one processor; The memory stores instructions executable by the at least one processor, which implements the horizontal well drainage method according to any one of claims 9 to 10 by executing the instructions stored in the memory.

13. A machine-readable storage medium storing instructions thereon, characterized in that, When executed by a processor, this instruction causes the processor to be configured to perform the horizontal well drainage method according to any one of claims 9 to 10.

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