Large-drift-diameter high-torque multi-channel continuous flow control valve for oil and gas well

Abstract

The utility model relates to the technical field of oil and gas well flow control valves, and provides an oil and gas well large-drift-diameter high-torque multi-channel continuous flow control valve which is characterized in that an upper connecting pipe and a lower connecting pipe are arranged at the two ends of an outer sleeve, an inner lining pipe is arranged in the outer sleeve, and a power module is arranged between the outer sleeve and the inner lining pipe; the hollow motor is arranged on one side of the power module, the cable connector is arranged on one side of the external sleeve and electrically connected with the power module, the hollow motor is connected with the spacer sleeve assembly through the transmission assembly, multiple sets of liquid inlet holes are formed in the position, corresponding to the spacer sleeve assembly, of the external sleeve, and the spacer sleeve assembly is used in cooperation with the liquid inlet holes. The underground interlayer flow control device is reasonable in structure, can automatically or remotely operate the underground interlayer flow control valve, is used for selectively controlling a plurality of layers, and can reduce the water content and cavitation erosion, reduce the intervention of an oil shaft and the like, so that the productivity of an oil well is improved to the maximum extent.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas well flow control valve technology, and in particular to a large-diameter, high-torque, multi-channel continuous flow control valve for oil and gas wells. Background Technology

[0002] In oil and gas extraction, flow control valves are important tools for controlling the gas / liquid flow between the casing and tubing. They can be used as control tools for operations such as liquid / gas injection and well fluid circulation in the casing and tubing.

[0003] As disclosed in application number CN202323442998.4, a large-diameter downhole drop-and-retrieve flow control valve includes, from top to bottom, a drop-in head, a drop-in connector, an upper valve body, a middle valve body, a lower valve body, and a single-flow valve body, all threaded together. The middle valve body has an opening communicating with its inner cavity. The inner cavities of the upper and lower valve bodies are respectively equipped with an upper single-flow valve and a lower single-flow valve with opposite flow directions. An axially limiting first sealing packing and a first spacer are fitted between the valve body and the connector. An axially limiting second sealing packing and a second spacer are provided between the middle and lower valve bodies. This utility model uses a spring-driven single-flow valve head for unidirectional flow control, has a large internal flow diameter, and has two injection flow channels, one upper and one lower.

[0004] However, the aforementioned devices are insufficient to solve the layer control problem faced by high-yield production wells. Utility Model Content

[0005] To address the aforementioned problems, this invention provides a large-diameter, high-torque, multi-channel continuous flow control valve for oil and gas wells.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A large-diameter, high-torque, multi-channel continuous flow control valve for oil and gas wells includes: an upper connecting pipe, a lower connecting pipe, an outer casing, an inner liner, a power module, a cable connector, a hollow motor, a transmission assembly, a baffle assembly, and a pipeline pressure sensor. The upper and lower connecting pipes are located at both ends of the outer casing, the inner liner is located inside the outer casing, the power module is located between the outer casing and the inner liner, the hollow motor is located on one side of the power module, the cable connector is located on one side of the outer casing and is electrically connected to the power module, the hollow motor is connected to the baffle assembly through the transmission assembly, the baffle assembly has multiple sets of inlet holes on the outer casing corresponding to the inlet holes, and the baffle assembly is used in conjunction with the inlet holes. The pipeline pressure sensor is located between the outer casing and the inner liner.

[0008] Preferably, the outer sleeve includes: an end sleeve and an intermediate sleeve. The end sleeve is provided in two sets, which are located at both ends of the intermediate sleeve. The two ends of the intermediate sleeve are connected to the upper connecting pipe and the lower connecting pipe respectively through the end sleeves. An inner liner is provided between the two sets of end sleeves, and the two ends of the inner liner are sealed to the end sleeves.

[0009] Preferably, the transmission assembly includes: a planetary gear, a valve screw, a coupling shaft, and a sliding inner sleeve. The planetary gear is connected to the valve screw, the valve screw is connected to the coupling shaft by a thread, the coupling shaft is fixedly connected to the sliding inner sleeve, and the sliding inner sleeve is connected to the end of the retaining sleeve assembly by a thread.

[0010] Preferably, the coupling is disposed between the outer sleeve and the inner liner through a dynamic seal.

[0011] Preferably, the baffle assembly includes a baffle and a sliding sleeve. One side of the baffle is used in conjunction with the liquid inlet of the outer sleeve, the other side of the baffle is fixedly connected to one side of the sliding sleeve, the other side of the sliding sleeve is slidably connected to the inner liner, and the outer side of the sliding sleeve is provided with an external thread, which is threadedly connected to the sliding inner sleeve through the external thread.

[0012] Preferably, a limiting sleeve is also provided on one side of the retaining sleeve. The limiting sleeve is fixedly installed inside the outer sleeve, and the outer side of the limiting sleeve is sealed to the lower connecting pipe.

[0013] Preferably, the upper connecting pipe is provided with an internal thread, and the lower connecting pipe is provided with an external thread, so that the upper connecting pipe and the lower connecting pipe can be threadedly connected by the internal thread and the external thread.

[0014] The advantages of this invention are as follows: This invention can automatically, manually, or remotely operate the downhole interlayer flow control valve by setting an external casing, power module, cable connector, hollow motor, transmission assembly, and retaining sleeve assembly. This allows for selective control of multiple layers, reducing water cut and cavitation, and minimizing wellbore intervention, thereby maximizing oil well productivity. By setting the cable connector, a single-core cable can selectively control the flow control valves of each layer. The control signal is simply sent from the surface control cabinet through the downhole cable to the flow control valve to adjust the flow rate entering the tubing. By setting a pipeline pressure sensor, key operating parameters such as pressure, temperature, and water cut measured downhole can be continuously transmitted to the surface control cabinet, guiding operators to further optimize production. Attached Figure Description

[0015] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the upper part of this utility model;

[0018] Figure 3 This is a schematic diagram of the middle part of this utility model;

[0019] Figure 4 This is a schematic diagram of the lower part of the present invention;

[0020] Figure 5 This is a schematic diagram of the structure of the outer sleeve of this utility model;

[0021] Figure 6 This is a structural schematic diagram of the retaining sleeve assembly of this utility model;

[0022] Figure 7 This is a schematic diagram of the production location setup of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Upper connecting pipe; 2. Lower connecting pipe; 3. Outer sleeve; 4. Inner liner; 5. Power module; 6. Cable connector; 7. Hollow motor; 8. Transmission assembly; 9. Sleeve assembly; 10. Pipeline pressure sensor; 31. End sleeve; 32. Intermediate sleeve; 81. Planetary gear; 82. Valve screw; 83. Coupling; 84. Sliding inner sleeve; 91. Sleeve; 92. Sliding sleeve; 93. Limiting sleeve. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Example 1, combined with Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 Explanation:

[0029] A large-diameter, high-torque, multi-channel continuous flow control valve for oil and gas wells includes: an upper connecting pipe 1, a lower connecting pipe 2, an outer casing 3, an inner liner 4, a power module 5, a cable connector 6, a hollow motor 7, a transmission assembly 8, a retaining sleeve assembly 9, and a pipeline pressure sensor 10. The upper connecting pipe 1 and lower connecting pipe 2 are located at both ends of the outer casing 3, the inner liner 4 is located inside the outer casing 3, the power module 5 is located between the outer casing 3 and the inner liner 4, the hollow motor 7 is located on one side of the power module 5, and the cable connector 6 is located on one side of the outer casing 3, electrically connected to the power module 5. The hollow motor 7 is connected to the retaining sleeve assembly 9 via the transmission assembly 8. The retaining sleeve assembly 9 has multiple sets of inlet holes on the outer casing 3, which cooperate with the inlet holes. The pipeline pressure sensor 10 is located between the outer casing 3 and the inner liner 4. The upper connecting pipe 1 has internal threads, and the lower connecting pipe 2 has external threads, allowing for threaded connection between the two.

[0030] The connecting pipe 1 and the lower connecting pipe 2 are threaded, providing strong connection force and good sealing performance. Threaded connections effectively prevent leakage in high-pressure environments such as oil and gas wells, ensuring safe system operation. Through the cooperation of the retaining sleeve assembly 9 and multiple sets of inlet holes, multi-channel flow control can be achieved to meet different production needs and optimize the production efficiency of oil and gas wells. The hollow motor 7 and transmission assembly 8 are designed to provide high torque output, which is crucial for driving and controlling large-diameter valves, ensuring rapid valve response and accurate flow control. The pipeline pressure sensor 10 monitors pressure changes inside the valve body in real time, providing data support for the surface control system and facilitating intelligent wellhead management. The power module 5 and cable connector 6 are located inside the valve body, protected by the outer casing 3 and inner liner 4, increasing the service life of electronic components in harsh environments.

[0031] Example 2, based on Example 1, combined with... Figure 5 Explanation:

[0032] The outer sleeve 3 includes: an end sleeve 31 and an intermediate sleeve 32. The end sleeve 31 is provided in two sets, and the two sets of end sleeve 31 are provided at both ends of the intermediate sleeve 32. The two ends of the intermediate sleeve 32 are respectively connected to the upper connecting pipe 1 and the lower connecting pipe 2 through the end sleeve 31. An inner liner 4 is provided between the two sets of end sleeve 31, and the two ends of the inner liner 4 are sealed to the end sleeve 31.

[0033] By dividing the outer casing into end casing 31 and intermediate casing 32, the pressure and torque from the wellhead can be better distributed and withstood, enhancing the overall structural strength and stability of the valve body. The inner liner 4 is sealed at both ends to the end casing 31; this double-seal design effectively prevents fluid leakage and improves the valve's sealing performance. The segmented design provides greater space and flexibility for the arrangement of internal components, allowing for a more rational installation and layout of internal components such as the power module 5, hollow motor 7, and transmission assembly 8.

[0034] Example 3, based on Example 2, combined with Figure 3 and Figure 4 Explanation:

[0035] The transmission assembly 8 includes: a planetary gear 81, a valve screw 82, a coupling shaft 83, and a sliding inner sleeve 84. The planetary gear 81 is connected to the valve screw 82, the valve screw 82 is connected to the coupling shaft 83 by a thread, the coupling shaft 83 is fixedly connected to the sliding inner sleeve 84, and the sliding inner sleeve 84 is connected to the end of the retaining sleeve assembly 9 by a thread.

[0036] The coupling 83 is dynamically sealed between the outer sleeve 3 and the inner liner 4.

[0037] The planetary gear 81 is designed to provide high torque transmission, which is crucial for the opening and closing of large-diameter valves, ensuring reliable operation under high-pressure environments. The threaded connection between the valve screw 82 and the coupling 83 enables precise linear motion, thereby accurately controlling the valve's opening and closing and ensuring precise flow regulation. The dynamic seal design reduces wear between the coupling 83 and the outer sleeve 3 and inner liner 4, extending the service life of the transmission components. The dynamic seal ensures that fluid does not leak from the gaps between the transmission components and the sleeves during transmission, improving the overall sealing performance of the valve. The fixed and threaded connection design of the coupling 83 makes maintenance and replacement of the transmission components easier, reducing maintenance complexity and cost.

[0038] Example 4, based on Example 3, combined with Figure 6Explanation:

[0039] The baffle assembly 9 includes a baffle 91 and a sliding sleeve 92. One side of the baffle 91 is used in conjunction with the liquid inlet of the outer sleeve 3, and the other side of the baffle 91 is fixedly connected to one side of the sliding sleeve 92. The other side of the sliding sleeve 92 is slidably connected to the inner liner 4. The outer side of the sliding sleeve 92 is provided with external threads, and the sliding sleeve 92 is threadedly connected to the sliding inner sleeve 84 through the external threads. A limiting sleeve 93 is also provided on one side of the baffle 91. The limiting sleeve 93 is fixedly installed inside the outer sleeve 3, and the outer side of the limiting sleeve 93 is sealed to the lower connecting pipe 2.

[0040] The retaining sleeve 91 works in conjunction with the inlet hole of the outer sleeve 3 to precisely control the inflow and outflow of fluid, achieving fine flow regulation. The sliding connection design between the sliding sleeve 92 and the inner liner 4 reduces friction and wear, extending the service life of the component. The limiting sleeve 93 fixes the position of the retaining sleeve 91 and provides a sealed connection with the lower connecting pipe 2, enhancing the overall sealing performance of the valve and preventing fluid leakage. The limiting sleeve 93 is fixed inside the outer sleeve 3, providing additional support for the retaining sleeve assembly and improving the structural stability of the entire valve.

[0041] The working principle of this utility model is as follows: When this device is in use, the ground control cabinet controls the hollow motor 7 through the cable connector 6 to send a command to the hollow motor 7. Subsequently, the hollow motor 7 drives the valve screw 82 through the planetary gear 81, which causes the connecting shaft 83 to drive the sliding inner sleeve 84 to move. As a result, the sliding inner sleeve 84 drives the baffle 91 to cover the inlet hole, thereby achieving the purpose of controlling the flow rate of oil and gas entering the well. This utility model has a reasonable structure and can automatically or remotely operate the downhole interlayer flow control valve for selectively controlling multiple layers. It can reduce water cut and cavitation, reduce wellbore intervention and other operations, thereby maximizing the production capacity of the oil well.

[0042] For those skilled in the art, this utility model is not limited to the details of the exemplary embodiments described above, and can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model; therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any minor modifications, equivalent substitutions and improvements made to the above embodiments based on the technical essence of the present utility model should be included within the protection scope of the technical solution of the present utility model.

Claims

1. A large-diameter, high-torque, multi-channel continuous flow control valve for oil and gas wells, characterized in that: include: The system comprises an upper connecting pipe (1), a lower connecting pipe (2), an outer sleeve (3), an inner liner (4), a power module (5), a cable connector (6), a hollow motor (7), a transmission assembly (8), a baffle assembly (9), and a pipeline pressure sensor (10). The upper connecting pipe (1) and the lower connecting pipe (2) are located at both ends of the outer sleeve (3), the inner liner (4) is located inside the outer sleeve (3), the power module (5) is located between the outer sleeve (3) and the inner liner (4), the hollow motor (7) is located on one side of the power module (5), the cable connector (6) is located on one side of the outer sleeve (3), and the cable connector (6) is electrically connected to the power module (5). The hollow motor (7) is connected to the baffle assembly (9) through the transmission assembly (8). The baffle assembly (9) has multiple sets of liquid inlet holes on the outer sleeve (3) corresponding to the liquid inlet holes. The baffle assembly (9) is used in conjunction with the liquid inlet holes. The pipeline pressure sensor (10) is located between the outer sleeve (3) and the inner liner (4).

2. The large-diameter, high-torque, multi-channel continuous flow control valve for oil and gas wells according to claim 1, characterized in that, The outer sleeve (3) includes: an end sleeve (31) and an intermediate sleeve (32). The end sleeve (31) is provided in two sets. The two sets of end sleeves (31) are provided at both ends of the intermediate sleeve (32). The two ends of the intermediate sleeve (32) are connected to the upper connecting pipe (1) and the lower connecting pipe (2) respectively through the end sleeves (31). An inner liner (4) is provided between the two sets of end sleeves (31). The two ends of the inner liner (4) are sealed to the end sleeves (31).

3. The large-diameter, high-torque, multi-channel continuous flow control valve for oil and gas wells according to claim 1, characterized in that, The transmission assembly (8) includes: a planetary gear (81), a valve screw (82), a connecting shaft (83), and a sliding inner sleeve (84). The planetary gear (81) is connected to the valve screw (82), the valve screw (82) is connected to the connecting shaft (83) by a thread, the connecting shaft (83) is fixedly connected to the sliding inner sleeve (84), and the sliding inner sleeve (84) is connected to the end of the retaining sleeve assembly (9) by a thread.

4. The large-diameter, high-torque, multi-channel continuous flow control valve for oil and gas wells according to claim 3, characterized in that, The coupling (83) is set between the outer sleeve (3) and the inner liner (4) by a dynamic seal.

5. The large-diameter, high-torque, multi-channel continuous flow control valve for oil and gas wells according to claim 3, characterized in that, The baffle assembly (9) includes a baffle (91) and a sliding sleeve (92). One side of the baffle (91) is used in conjunction with the liquid inlet of the outer sleeve (3), and the other side of the baffle (91) is fixedly connected to one side of the sliding sleeve (92). The other side of the sliding sleeve (92) is slidably connected to the inner liner (4). The outer side of the sliding sleeve (92) is provided with an external thread, and the sliding sleeve (92) is threadedly connected to the sliding inner sleeve (84) through the external thread.

6. The large-diameter, high-torque, multi-channel continuous flow control valve for oil and gas wells according to claim 5, characterized in that, A limiting sleeve (93) is also provided on one side of the retaining sleeve (91). The limiting sleeve (93) is fixedly installed inside the outer sleeve (3), and the outer side of the limiting sleeve (93) is sealed to the lower connecting pipe (2).

7. The large-diameter, high-torque, multi-channel continuous flow control valve for oil and gas wells according to claim 1, characterized in that, The upper connecting pipe (1) is provided with an internal thread, and the lower connecting pipe (2) is provided with an external thread. The upper connecting pipe (1) and the lower connecting pipe (2) can be connected by the internal thread and the external thread.

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