Hollow motor-driven intelligent switch for layered control of oil and gas well

Abstract

The utility model discloses a hollow motor-driven intelligent switch for oil and gas well layered control, which relates to the technical field of switches and comprises a support connecting unit, a transmission unit and a control communication unit, the support connecting unit mainly comprises a connector A, a fixed seat A, a connecting nut A, a valve seat, a transmission cavity shell, a connecting nut B, a connecting seat, a controller shell, a connecting pipe, a connecting nut C, a fixed seat B and a connector B; the transmission unit mainly comprises a dynamic sealing device B, a hollow torque motor, a speed reducer, an output flange plate, a bearing check ring, a transmission nut assembly, a hollow lead screw, a spacer ring, a dynamic sealing device A and a valve element. The control communication unit mainly comprises a central controller; the transmission link is reduced, the mechanical efficiency is improved, the working reliability is improved, and the continuous oil pipe is matched for dragging, so that the device can be put at any underground position at one time; and the large output torque ensures the normal opening of the intelligent switch under the condition that the internal and external pressure difference is not less than 10MPa.

Description

Technical Field

[0001] The invention relates to the field of switches, and more specifically to a hollow motor driven intelligent switch for oil and gas well stratification control. Background Art

[0002] The existing switches used for stratified control of oil and gas wells have problems such as low driving power, slow response speed, small flow area, which leads to easy scaling and clogging of the valve port, and difficulty in achieving concentric full bore.

[0003] Based on the above problems, this patent summarizes and analyzes mechanical stratified water plugging, downhole pressure-controlled switches and other oil well stratification control tools, and develops a hollow motor-driven intelligent switch for oil and gas well stratification control; the regulating valve is driven by a hollow torque motor and a hollow reducer to achieve a full-diameter, concentric structure of the tool to meet the large-displacement flow requirements and the passage of logging tools; through the hollow structure of the motor, the motor power is maximized within a limited installation space, and a large torque output is achieved, which greatly improves the valve switch reliability under the downhole pressure difference environment and the anti-jamming performance of complex downhole media; and through the integrated radio frequency communication module, a higher data transmission rate and stability are achieved, and the data and control instructions obtained by the downhole sensors can be quickly and reliably transmitted, and automatic adjustment and optimization are realized to ensure the reliable operation of the oil and gas well stratification control system, and further improve the production efficiency and economic benefits of oil and gas wells. Summary of the invention

[0004] The purpose of the present invention is to provide a hollow motor driven intelligent switch for oil and gas well stratification control, which uses the principle of wireless radio frequency to achieve intelligent communication with a central controller built into a downhole tool, thereby driving the action of the intelligent switch;

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A hollow motor driven intelligent switch for oil and gas well stratification control, comprising a support connection unit, a transmission unit and a control communication unit, wherein:

[0007] The supporting connection unit mainly includes a connector A, a fixing seat A, a connecting nut A, a valve seat, a transmission chamber housing, a connecting nut B, a connecting seat, a controller housing, a connecting pipe, a connecting nut C, a fixing seat B, and a connector B;

[0008] The transmission unit mainly includes a dynamic sealing device B, a hollow torque motor, a reducer, an output flange, a bearing retaining ring, a transmission nut assembly, a hollow lead screw, a spacer ring, a dynamic sealing device A, and a valve core;

[0009] The control and communication unit mainly includes a central controller;

[0010] Among them, in a hollow motor driven intelligent switch supporting connection unit for oil and gas well stratification control, the connector A is threadedly connected with the fixing seat A, the connecting nut A is fixed on the valve seat and threadedly matched with the fixing seat A, the valve seat, the transmission chamber housing, the connecting nut B, the connecting seat, the controller housing, the connecting nut C, and the fixing seat B are threadedly connected in sequence, the rear end of the fixing seat B is threadedly matched with the connector B, and the connecting pipe is fixed between the connecting seat and the fixing seat B; thus forming the main frame part of the intelligent switch;

[0011] In the transmission unit, the hollow torque motor is connected with the reducer, the reducer is fixed with the output flange, the output flange is spline-connected with the transmission nut assembly, the transmission nut assembly is threadedly connected with the hollow lead screw, and the hollow lead screw is fixedly connected with the valve core by a pin, wherein the two ends of the transmission nut assembly are provided with a spacer ring and a bearing retaining ring to play a positioning support role; the two ends of the hollow lead screw are provided with dynamic sealing devices A and B to ensure the stability of the motor and reducer and prevent damage due to water immersion;

[0012] In the control and communication unit, the central controller contains a power supply battery, a microcontroller and a wireless communication module, which processes and analyzes the radio frequency signal and sends instructions to the actuator to control the action of the switch valve;

[0013] Preferably, the hollow rotor and reducer ensure that the central liquid passage has a large inner diameter;

[0014] Preferably, the large output torque of the hollow torque motor ensures smooth opening of the valve core, and the intelligent switch adopts a split-type oblong hole-shaped valve port to prevent clogging and scaling due to underground impurities and to meet the intelligent regulation of the tool valve port.

[0015] The beneficial effects of the hollow motor driven intelligent switch for oil and gas well stratification control of the present invention are:

[0016] 1. The present invention adopts a hollow torque motor to realize the regulation of the intelligent switch, which reduces the transmission links, improves the mechanical efficiency, and enhances the working reliability. With the help of the coiled tubing, it can be placed at any position underground in a single time; and the large output torque ensures the normal opening of the intelligent switch under the pressure difference between the inside and outside of not less than 10MPa;

[0017] 2. The present invention adopts wireless radio frequency communication to control the action of the switch. Data instructions and other information are converted into radio frequency signals. Information transmission between the ground and underground is achieved through radio waves. It has the advantages of long distance, fast transmission rate, and ability to penetrate obstacles. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0019] Figure 1This is an overall structural diagram of a hollow motor driven intelligent switch for oil and gas well stratification control;

[0020] Figure 2 It is a schematic diagram of the transmission structure of a hollow motor driven intelligent switch for oil and gas well stratification control;

[0021] Figure 3 A schematic diagram of the valve opening state of a hollow motor driven intelligent switch for oil and gas well stratification control;

[0022] Figure 4 A schematic diagram of the valve closing state of a hollow motor-driven intelligent switch for oil and gas well stratification control;

[0023] Figure 5 The figure is a schematic diagram of the wireless radio frequency intelligent communication principle of a hollow motor driven intelligent switch for oil and gas well stratification control.

[0024] Figure 6 The schematic diagram of a hollow motor-driven intelligent switch process string for stratified control of oil and gas wells is shown in FIG.

[0025] Figure 7 The schematic diagram of a radio frequency tag of a hollow motor-driven intelligent switch process string for stratified control of oil and gas wells is shown.

[0026] In the figure: 1. Connector A; 2. Fixing seat A; 3. Connecting nut A; 4. Valve seat; 5. Valve core; 6. Transmission chamber housing; 7. Dynamic sealing device A; 8. Spacer ring; 9. Hollow screw; 10. Transmission nut assembly; 11. Bearing retaining ring; 12. Output flange; 13. Reducer; 14. Hollow torque motor; 15. Dynamic sealing device B; 16. Connecting nut B; 17. Connecting seat; 18. Controller housing; 19. Connecting pipe; 20. Central controller; 21. Connecting nut C; 22. Fixing seat B; 23. Connector B;

[0027] 1-1, ground controller; 1-2, command reader / writer; 1-3, wireless communication module A;

[0028] 2-1, power supply battery A; 2-2, microcontroller A; 2-3, wireless communication module B;

[0029] 3-1, power supply battery B; 3-2, microcontroller B; 3-3, wireless communication module C; 3-4, actuator;

[0030] 4-1, oil and gas wellhead; 4-2, radio frequency tag; 4-3, oil pipe; 4-4, casing; 4-5, intelligent switch; 4-6, packer; 4-7, thread plug; 4-21, antenna; 4-22 circuit board. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0032] like Figure 1 As shown, a hollow motor driven intelligent switch for oil and gas well stratification control includes a support connection unit, a transmission unit and a control communication unit, wherein the support connection unit mainly includes a connector A1, a fixing seat A2, a connecting nut A3, a valve seat 4, a transmission chamber housing 6, a connecting nut B16, a connecting seat 17, a controller housing 18, a connecting pipe 19, a connecting nut C21, a fixing seat B22, and a connector B23; the transmission unit mainly includes a dynamic sealing device B15, a hollow torque motor 14, a reducer 13, an output flange 12, a bearing retaining ring 11, a transmission nut assembly 10, a hollow screw 9, a spacer ring 8, a dynamic sealing device A7, and a valve core 5; the control communication unit mainly includes a central controller 20;

[0033] Combination Figure 1 and Figure 2 In one hollow motor driven intelligent switch supporting connection unit for oil and gas well stratification control, the connector A1 is threadedly connected with the fixing seat A2, the connecting nut A3 is fixed on the valve seat 4 and threadedly matched with the fixing seat A2, the valve seat 4, the transmission chamber housing 6, the connecting nut B16, the connecting seat 17, the controller housing 18, the connecting nut C21, and the fixing seat B22 are threadedly connected in sequence, the rear end of the fixing seat B22 is threadedly matched with the connector B23, and the connecting pipe 19 is fixed between the connecting seat 17 and the fixing seat B22; thus, the main frame part of the intelligent switch is formed; in the transmission unit, the hollow torque motor 14 is connected with the reducer 13, and the reducer 13 is connected with the output flange 12 Fixed, the output flange 12 is spline-connected with the transmission nut assembly 10, the transmission nut assembly 10 is threadedly connected with the hollow lead screw 9, and the hollow lead screw 9 is fixedly connected with the valve core 5 by pins, wherein the two ends of the transmission nut assembly 10 are provided with spacer rings 8 and bearing retaining rings 11 to play a positioning and supporting role; dynamic sealing devices A7 and B15 are provided at both ends of the hollow lead screw 9 to ensure the stability of the use of the hollow torque motor 14 and the reducer 13 to prevent damage due to water immersion; in the control and communication unit, the central controller 20 contains a power supply battery B3-1, a microcontroller B3-2 and a wireless communication module C3-3, which processes and analyzes the radio frequency signal, and sends instructions to the actuator to control the action of the switch valve;

[0034] The hollow structure of the rotor of the hollow torque motor 14 and the reducer 13 ensures that the central liquid passage has a large inner diameter;

[0035] The large output torque of the hollow torque motor 14 ensures the smooth opening of the valve core, and the intelligent switch adopts a double-opening oblong hole-shaped valve port to prevent clogging and scaling due to underground impurities and meet the intelligent control of the tool valve port;

[0036] like Figure 5 As shown, in actual operation, the ground controller 1-1 sends instructions to the instruction reader / writer 1-2, the instruction reader / writer 1-2 passes it to the wireless communication module A1-3, the power supply battery A2-1 supplies power to the microcontroller A2-2, the wireless communication module A1-3 transmits information to the wireless communication module B2-3, the wireless communication module B2-3 receives the information and transmits it to the microcontroller A2-2, the microcontroller A2-2 receives the transmission instruction, the microcontroller A2-2 sends information to the wireless communication module B2-3, the transmission command is continuously cycled, the wireless communication module C3-3 receives the instruction and passes it to the microcontroller B3-2, the microcontroller B3-2 drives the actuator 3-4 to produce corresponding actions according to the information received from the wireless communication module C3-3;

[0037] Combination Figure 6 and Figure 7 In a hollow motor-driven intelligent switch process string for oil and gas well stratified control, the oil and gas well wellhead 4-1 connects the downhole intelligent switch valve 4-5 and the packer 4-6 in series in sequence through the oil pipe 4-3, and a wire plug 4-7 is provided at the bottom of the tool string. The whole set of tools is isolated in the casing 4-4 ​​through the packer 4-6 to realize stratified control; wherein the radio frequency tag 4-2 has a built-in signal transmission and control unit including an antenna 4-21 and a circuit board 4-22, and sends the command signal to the intelligent switch valve 4-6 through the above-mentioned wireless radio frequency communication principle to realize stratified adjustment; Specific implementation method one:

[0039] Combination Figure 1 and Figure 3 The implementation method of the valve opening state is described. The hollow torque motor 14 receives an opening command sent by the central controller 21. The hollow torque motor 14 rotates forward to drive the reducer 13 to rotate. The reducer 13 drives the transmission nut assembly 11 to rotate by connecting the output flange 13. The transmission nut assembly 11 drives the hollow lead screw 10 and the valve core 6 connected with the pin to open the valve linearly through the connecting thread pair, thereby realizing the valve opening action of the sliding sleeve. Specific implementation method 2:

[0041] Combination Figure 1 and Figure 4 The implementation method of the valve closing state is described.

[0042] The central controller 21 sends a closing command, the hollow torque motor 14 reverses, driving the reducer 13 to rotate, and the reducer 13 drives the transmission nut assembly 11 to rotate by connecting the reducer output flange 13, and then drives the hollow lead screw 10 and the valve core 6 to close the valve linear motion through the connecting thread pair, realizing the intelligent switch valve closing action, the hollow lead screw 10 has a lead of 5mm, and when the hollow torque motor 14 rotates 16 circles, the valve port is completely closed.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hollow motor driven intelligent switch for oil and gas well stratification control, characterized in that: It includes a supporting connection unit, a transmission unit and a control communication unit, wherein: The supporting connection unit mainly comprises a connecting head A (1), a fixing seat A (2), a connecting nut A (3), a valve seat (4), a transmission chamber housing (6), a connecting nut B (16), a connecting seat (17), a controller housing (18), a connecting pipe (19), a connecting nut C (21), a fixing seat B (22), and a connecting head B (23); The transmission unit mainly comprises a dynamic sealing device B (15), a hollow torque motor (14), a reducer (13), an output flange (12), a bearing retaining ring (11), a transmission nut assembly (10), a hollow lead screw (9), a spacer ring (8), a dynamic sealing device A (7), and a valve core (5); The control communication unit mainly includes a central controller (20); Wherein: the supporting connection unit: the connecting head A (1) is threadedly connected to the fixing seat A (2), the connecting nut A (3) is fixed on the valve seat (4) and threadedly matched with the fixing seat A (2), the valve seat (4), the transmission chamber housing (6), the connecting nut B (16), the connecting seat (17), the controller housing (18), the connecting nut C (21), and the fixing seat B (22) are threadedly connected in sequence, the rear end of the fixing seat B (22) is threadedly matched with the connecting head B (23), wherein the connecting pipe (19) is fixed between the connecting seat (17) and the fixing seat B (22); In the transmission unit: the hollow torque motor (14) is connected with the reducer (13), the reducer (13) is fixed with the output flange (12), wherein the output flange (12) is spline-connected with the transmission nut assembly (10), the transmission nut assembly (10) is threadedly connected with the hollow lead screw (9), the hollow lead screw (9) is fixedly connected with the valve core (5) by a pin, wherein the two ends of the transmission nut assembly (10) are provided with a spacer ring (8) and a bearing retaining ring (11) to play a positioning and supporting role; the two ends of the hollow lead screw (9) are provided with dynamic sealing devices A (7) and B (15) to ensure the use stability of the hollow torque motor (14) and the reducer (13) and prevent damage due to water immersion; In the control communication unit: the central controller (20) contains a power supply battery B (3-1), a microcontroller B (3-2) and a wireless communication module C (3-3), processes and analyzes radio frequency signals, and sends instructions to the actuator to control the action of the switch valve.

2. The hollow motor driven intelligent switch for oil and gas well stratification control according to claim 1, characterized in that: The hollow structures of the rotor of the hollow torque motor (14) and the reducer (13) ensure that the central liquid passage has a large inner diameter.

3. The hollow motor driven intelligent switch for oil and gas well stratification control according to claim 2, characterized in that: The large output torque of the hollow torque motor (14) ensures smooth opening of the valve core, and the intelligent switch adopts a split-type oblong hole-shaped valve port to prevent clogging and scaling due to underground impurities and meet the intelligent control of the tool valve port.

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