Electrically controlled radial opening and closing downhole safety valve

Abstract

This invention discloses an electrically controlled radially opening and closing downhole safety valve, comprising an upper connector, a central tube, a hollow shaft motor, a rotating sleeve, a spiral sleeve, a connecting cylinder, a valve plate sealing plate mounting base, a lower connector, a return spring, a cover, a valve housing, a valve plate opening and closing control disc, valve plate sealing plate I, valve plate sealing plate II, a rotating disc, and a fixing block. This invention achieves radial opening and closing of the downhole safety valve under electrically controlled drive, solving the problem of uneven force and deformation of the valve plate due to the impact of high-pressure, high-speed fluids downhole; it achieves automatic closing of the downhole safety valve in case of motor failure, solving the problem of existing electrically controlled downhole safety valves lacking a failure protection mechanism; and it achieves synchronous response between the opening and closing of the downhole safety valve and the driving device, solving the problem of slow response speed in the opening and closing process of existing downhole safety valves. This invention features better adaptability, faster response speed, and higher operational safety.

Description

Technical Field

[0001] This invention relates to the fields of oil and gas engineering and gas storage, and particularly to an electrically controlled radially opening and closing downhole safety valve. Background Technology

[0002] Downhole safety valves are critical equipment widely used in oil and gas extraction and storage operations. Their main function is to monitor and control the pressure of downhole oil and gas flow at the wellhead. In the event of abnormal conditions, such as wellhead pressure exceeding the normal range or downhole equipment failure, the downhole safety valve can quickly close, stopping wellhead production, ensuring wellhead safety, and preventing the occurrence of abnormal situations.

[0003] Existing downhole safety valves are mainly classified into two types based on their control method: hydraulically controlled and electrically controlled. Through research, it has been found that existing downhole safety valves still have many problems in use, mainly as follows:

[0004] (1) Traditional downhole safety valves are hydraulically driven, but hydraulic drives have a series of problems such as high cost, difficulty in maintenance, and limited downhole depth; while existing electrically controlled safety valves have problems such as large size and high energy consumption due to the need for a large number of mechanical and electronic components.

[0005] (2) The opening and closing of existing downhole safety valves are achieved by driving the valve plate through the downward and upward movement of the central tube. Although the existing hydraulic downhole safety valves have a failure protection mechanism, that is, when the hydraulic pipeline is damaged, the central tube can be pushed upward by the return spring to close the downhole safety valve, the existing electrically controlled downhole safety valves use a motor to drive the ball screw to drive the central tube downward and upward. When the motor fails, the central tube cannot return under the push of the return spring, thus there is a problem that there is no failure protection mechanism.

[0006] (3) When the existing downhole safety valve is closed, the valve plate will be damaged and deformed due to the impact of the high pressure and high speed fluid downhole. This will cause the valve plate to be subjected to uneven force and thus lose the function of high pressure sealing of the downhole safety valve.

[0007] (4) The opening and closing of existing downhole safety valves are all driven by the central pipe to drive the valve plate. However, the central pipe needs a certain amount of time to go down and up, which makes the opening and closing response speed of the downhole safety valve slow. Disasters often occur in milliseconds, which will cause accidents such as well kicks and blowouts.

[0008] (5) The existing downhole safety valve has disadvantages such as large diameter and heavy weight. During the closing process of the downhole safety valve, the retraction of the central tube will cause vibration and impact load, which will accelerate the wear and damage of the valve internal components. This will shorten the service life of the safety valve and increase the frequency and cost of maintenance and replacement.

[0009] In summary, there is an urgent need to invent an electrically controlled radially opening and closing downhole safety valve to solve the aforementioned problems existing in the use of existing hydraulically and electrically controlled downhole safety valves, thereby effectively improving the adaptability, responsiveness, and safety of downhole safety valves. Summary of the Invention

[0010] The purpose of this invention is to overcome the shortcomings of existing technologies and provide an electrically controlled radially opening and closing downhole safety valve. This invention uses a hollow shaft motor to achieve pure electric control of the downhole safety valve, solving a series of problems such as high cost, difficult maintenance, and limited running depth of existing hydraulically controlled downhole safety valves, as well as the problems of large size and high energy consumption of existing electrically controlled downhole safety valves due to the need for numerous mechanical and electronic components. This invention uses a rotating sleeve to drive the central tube to slide on the groove of the spiral sleeve, causing the central tube to rotate and extend. Because the helix angle of the groove on the spiral sleeve is greater than the equivalent friction angle, in the event of motor failure, the central tube can rotate back in the opposite direction under the indirect push of the return spring, realizing automatic closure of the downhole safety valve in the event of motor failure, solving the problem that existing electrically controlled downhole safety valves lack a failure protection mechanism. This invention uses a valve plate opening and closing control disc to drive the valve plate... Sealing plate I and valve plate sealing plate II slide radially on the valve plate mounting base to complete the radial opening and closing of the downhole safety valve. This achieves uniform force change on the valve plate during high-pressure opening and closing of the downhole safety valve, solving the problem of uneven force and deformation of the valve plate caused by the impact of high-pressure and high-speed fluid in the downhole. The present invention uses a rotating disk. Since the rotating disk is mounted on the central tube and is axially connected to the valve plate opening and closing control disk, the motor power can be transmitted to the valve plate opening and closing control disk in real time through the rotating disk on the central tube. This achieves synchronous response between the opening and closing of the downhole safety valve and the drive device, solving the problem of slow opening and closing response speed of the existing downhole safety valve. At the same time, it reduces the wear and damage of the internal components of the downhole safety valve, improving the service life and reliability of the downhole safety valve.

[0011] The objective of this invention is achieved through the following technical solution: an electrically controlled radially opening and closing downhole safety valve, characterized in that it comprises an upper connector, a central tube, a hollow shaft motor, a rotating sleeve, a spiral sleeve, a connecting cylinder, a valve plate sealing plate mounting base, a lower connector, a return spring, a cover, a valve housing, a valve plate opening and closing control disc, valve plate sealing plate I, valve plate sealing plate II, a rotating disc, and a fixing block; the central tube is provided with two cylindrical bosses I and external threads; the rotating sleeve is provided with a straight groove and through holes I evenly distributed around its lower end; the spiral sleeve is provided with a sliding groove, the helix angle of which is greater than the equivalent friction angle; and the rotating disc is provided with internal threads. The upper end is circumferentially provided with transmission grooves; the valve plate opening and closing control disc is provided with sealing groove IV; the upper end is circumferentially provided with transmission protrusions; the middle end is circumferentially provided with angle limiting grooves; and the lower end is circumferentially provided with cylindrical bosses II. The valve plate sealing plate I is provided with sealing groove V, movable boss I, sealing protrusion I, movable groove I, and flow-blocking protrusion; the valve plate sealing plate II is provided with sealing groove VI, movable boss II, sealing protrusion II, and movable groove II; the valve plate sealing plate mounting base is provided with sealing groove III; the upper end is circumferentially provided with valve plate sealing plate guide grooves, pillars, and threaded holes III; and the lower end is circumferentially provided with threaded holes II. The upper connector is connected to the connecting cylinder via threads. The hollow shaft motor is installed inside the upper connector. The rotating sleeve is bolted to the hollow shaft motor. The spiral sleeve is installed outside the rotating sleeve. The central tube is installed inside the rotating sleeve. The cylindrical boss I passes through the straight groove and mates with the sliding groove, so that when the rotating sleeve rotates, it drives the cylindrical boss I to move along the sliding groove, thereby causing the central tube to perform a combined rotational and axial displacement motion. The internal thread on the rotating disk is connected to the external thread on the central tube. The transmission protrusion is installed in the transmission groove on the rotating disk. The angle limiting groove is used to install the column and thus limit the rotation angle of the valve plate opening and closing control disk. The valve plate sealing plate I and The valve plate sealing plate II is alternately installed circumferentially between the valve plate opening and closing control disc and the valve plate sealing plate mounting base. The cylindrical boss II is installed in the moving groove I of the valve plate sealing plate I and the moving groove II of the valve plate sealing plate II. The moving boss I and the moving boss II are installed in the valve plate sealing plate guide groove. The sealing protrusion I is installed in the sealing groove VI and the sealing protrusion II is installed in the sealing groove V. The fixing block is connected to the threaded hole III on the column to connect the valve plate opening and closing control disc to the valve plate sealing plate mounting base. The valve shell is installed in the connecting cylinder. The return spring is installed outside the valve shell. The lower connector is connected to the connecting cylinder by threads.

[0012] The upper connector is provided with a motor mounting slot, a sealing slot I, and a cable connection channel. The motor mounting slot is used to install a hollow shaft motor.

[0013] The central tube has an upper tube wall and a lower tube wall, and the upper tube wall is thicker than the lower tube wall.

[0014] The connecting cylinder is provided with a sealing plate mounting groove, step I, step II, sealing groove II and rectangular groove. The sealing cap is embedded in the sealing plate mounting groove and the valve shell is installed between step I and step II.

[0015] The valve housing has a circumferential protrusion at the lower end and through holes II evenly distributed in the middle. The circumferential protrusion is installed in a rectangular groove. The valve plate sealing plate mounting base is connected to the valve housing by screws.

[0016] The beneficial effects of this invention are:

[0017] (1) It realizes pure electric control of downhole safety valves, without the need for complex supporting facilities, and the downhole depth is not limited. It also has a simple structure, small size, and does not require a large number of electronic components, thus reducing manufacturing costs.

[0018] (2) A failure protection mechanism for electrically controlled downhole safety valves has been implemented, which solves the problem that the downhole safety valve cannot automatically close due to the use of motors and complex mechanisms, thus improving the safety of its operation.

[0019] (3) It achieves uniform force change on the valve plate during the opening and closing of the downhole safety valve, thereby improving the service life and reliability of the downhole safety valve plate.

[0020] (4) The opening and closing action of the downhole safety valve and the drive device are responded to simultaneously, which improves the opening and closing response speed of the downhole safety valve and can prevent accidents such as well kick and blowout in a timely manner.

[0021] (5) It reduces the wear and damage of internal components of the downhole safety valve, and improves the service life and reliability of the downhole safety valve. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the entire cross-section of the present invention;

[0023] Figure 2 This is a half-sectional view and a three-dimensional schematic diagram of the connector of the present invention;

[0024] Figure 3 These are a half-sectional view and a three-dimensional view of the connecting cylinder of the present invention;

[0025] Figure 4 This is a three-dimensional schematic diagram of the assembly of parts that enable the central tube to rotate and extend in this invention.

[0026] Figure 5 This is a three-dimensional schematic diagram and a half-sectional view of the central tube of the present invention;

[0027] Figure 6 This is a three-dimensional schematic diagram of the rotating disk of the present invention;

[0028] Figure 7This is a three-dimensional schematic diagram of the rotating sleeve of the present invention;

[0029] Figure 8 This is a three-dimensional schematic diagram of the spiral sleeve of the present invention;

[0030] Figure 9 This is a three-dimensional schematic diagram of the assembly of parts that enable the radial opening and closing function of the valve plate in this invention;

[0031] Figure 10 This is a three-dimensional schematic diagram of the valve opening process of the present invention;

[0032] Figure 11 This is an exploded three-dimensional schematic diagram of the parts that enable the radial opening and closing function of the valve plate in this invention;

[0033] Figure 12 This is a three-dimensional schematic diagram of the valve housing of the present invention;

[0034] Figure 13 This is a three-dimensional schematic diagram of the mounting base for the valve plate sealing sheet of the present invention;

[0035] Figure 14 This is a three-dimensional schematic diagram of the valve plate sealing sheet I of the present invention;

[0036] Figure 15 This is a three-dimensional schematic diagram of the valve plate sealing sheet II of the present invention;

[0037] Figure 16 This is a three-dimensional schematic diagram of the valve plate opening and closing control panel of the present invention;

[0038] Figure 17 This is a three-dimensional schematic diagram of the safety valve closing and safety valve opening of the present invention;

[0039] In the diagram: 1. Upper connector; 101. Motor mounting slot; 102. Sealing groove I; 103. Cable connection channel; 2. Central tube; 201. Cylindrical boss I; 202. External thread; 203. Upper tube wall; 204. Lower tube wall; 3. Hollow shaft motor; 4. Rotating sleeve; 401. Straight groove; 402. Through hole I; 5. Spiral sleeve; 501. Sliding groove; 6. Connecting cylinder; 601. Sealing plate mounting slot; 602. Step I; 603. Step II; 604. Sealing groove II; 605. Rectangular groove; 7. Valve plate sealing plate mounting base; 701. Valve plate sealing plate guide groove; 702. Column; 703. Threaded hole II; 704. Threaded hole III; 705. Sealing groove III; 8. Lower connector; 9. 10. Return spring; 11. Cover; 12. Valve housing; 13. Circumferential protrusion; 14. Through hole II; 15. Valve plate opening and closing control panel; 16. Transmission protrusion; 17. Angle limiting groove; 18. Cylindrical boss II; 19. Sealing groove IV; 10. Valve plate sealing plate I; 11. Sealing groove V; 12. Moving boss I; 13. Sealing protrusion I; 14. Moving groove I; 15. Flow-blocking protrusion; 16. Valve plate sealing plate II; 17. Sealing groove VI; 18. Moving boss II; 19. Sealing protrusion II; 10. Moving groove II; 10. Rotary disk; 11. Transmission groove; 12. Internal thread; 13. Fixing block. Detailed Implementation

[0040] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] In the description of this invention, it should be noted that the directions or positional relationships indicated by terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention 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 invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this invention, 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 fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] like Figure 1-17An electrically controlled radially opening and closing downhole safety valve, characterized in that it comprises an upper connector 1, a central tube 2, a hollow shaft motor 3, a rotating sleeve 4, a spiral sleeve 5, a connecting cylinder 6, a valve plate sealing plate mounting base 7, a lower connector 8, a return spring 9, a cover 10, a valve housing 11, a valve plate opening and closing control disc 12, a valve plate sealing plate I 13, a valve plate sealing plate II 14, a rotating disc 15, and a fixing block 16; the central tube 2 is provided with two cylindrical bosses I 201 and external threads 202, and the rotating sleeve 4 is provided with straight grooves 40. 1. The lower end is provided with through holes I 402 evenly distributed around its circumference; the spiral sleeve 5 is provided with a sliding groove 501, the helix angle of the sliding groove 501 is greater than the equivalent friction angle; the rotating disk 15 is provided with an internal thread 1502, and the upper end is provided with transmission grooves 1501 evenly distributed around its circumference; the valve plate opening and closing control disk 12 is provided with a sealing groove IV 1204, the upper end is provided with transmission protrusions 1201 evenly distributed around its circumference, the middle end is provided with angle limiting grooves 1202 evenly distributed, and the lower end is provided with cylindrical bosses II 1203 evenly distributed; the valve plate sealing plate I 13 is provided with a sealing groove. The valve plate sealing plate II 14 is provided with sealing groove V 1301, movable boss I 1302, sealing protrusion I 1303, movable groove I 1304, and flow-blocking protrusion 1305. The valve plate sealing plate II 14 is provided with sealing groove VI 1401, movable boss II 1402, sealing protrusion II 1403, and movable groove II 1404. The valve plate sealing plate mounting base 7 is provided with sealing groove III 705. The upper end is circumferentially evenly provided with valve plate sealing plate guide groove 701, column 702, and threaded hole III 704, and the lower end is circumferentially evenly provided with threaded hole II 703. The upper connector 1 is connected to the connecting sleeve 6 by threads. The hollow shaft motor 3 is installed inside the upper connector 1. The rotating sleeve 4 is connected to the hollow shaft motor 3 by bolts. The spiral sleeve 5 is installed outside the rotating sleeve 4. The central tube 2 is installed inside the rotating sleeve 4. The cylindrical boss I 201 passes through the straight groove 401 and cooperates with the sliding groove 501 so that when the rotating sleeve 4 rotates, it drives the cylindrical boss I 201 to move along the sliding groove 501, thereby causing the central tube 2 to perform a combined rotational and axial displacement motion.The internal thread 1502 on the rotating disk 15 is connected to the external thread 202 on the central tube 2. The transmission protrusion 1201 is installed in the transmission groove 1501 on the rotating disk 15. The angle limiting groove 1202 is used to install the column 702 and thus limit the rotation angle of the valve plate opening and closing control disk 12. The valve plate sealing plate I 13 and valve plate sealing plate II 14 are alternately installed circumferentially between the valve plate opening and closing control disk 12 and the valve plate sealing plate mounting base 7. The cylindrical boss II 1203 is installed in the moving groove I 1304 of the valve plate sealing plate I 13 and the moving groove of the valve plate sealing plate II 14. Within II1404, the movable boss I1302 and movable boss II1402 are installed within the valve plate sealing plate guide groove 701. The sealing protrusion I1303 is installed within the sealing groove VI1401, and the sealing protrusion II1403 is installed within the sealing groove V1301. The fixing block 16 is connected to the threaded hole III704 on the column 702. The valve plate opening and closing control disc 12 is connected to the valve plate sealing plate mounting base 7. The valve housing 11 is installed inside the connecting cylinder 6, and the return spring 9 is installed outside the valve housing 11. The lower connector 8 is connected to the connecting cylinder 6 via threads.

[0045] The upper connector 1 is provided with a motor mounting groove 101, a sealing groove I 102 and a cable connection channel 103. The motor mounting groove 101 is used to install the hollow shaft motor 3.

[0046] The central tube 2 has an upper tube wall 203 and a lower tube wall 204, wherein the upper tube wall 203 is thicker than the lower tube wall 204.

[0047] The connecting cylinder 6 is provided with a sealing plate mounting groove 601, step I 602, step II 603, sealing groove II 604 and rectangular groove 605. The sealing cover 10 is embedded in the sealing plate mounting groove 601, and the valve shell 11 is installed between step I 602 and step II 603.

[0048] The valve housing 11 has a circumferential protrusion 1101 at the lower end and through holes II 1102 evenly distributed in the middle. The circumferential protrusion 1101 is installed in the rectangular groove 605. The valve plate sealing plate mounting base 7 is connected to the valve housing 11 by screws.

[0049] The working process of this invention is as follows:

[0050] When the safety valve needs to be opened during normal operation, the ground control console issues a command to open the valve plate, supplying power to the hollow shaft motor 3. The hollow shaft motor 3 rotates, driving the rotating sleeve 4 to rotate. The straight groove 401 on the rotating sleeve 4 drives the cylindrical boss I 201 on the central tube 2 to slide in the sliding groove 501 of the spiral sleeve 5, causing the central tube 2 to rotate and push out. At this time, the return spring 9 begins to compress. Because the transmission protrusion 1201 is embedded in the transmission groove 1501 on the rotating disk 15, the rotating disk 15 on the central tube 2 can transmit torque to the valve plate opening and closing control disk 12, causing the valve plate opening and closing control disk 12 to rotate. The cylindrical boss II 1203 on the valve plate opening and closing control disk 12 squeezes the moving groove I 1304 on the valve plate sealing plate I 13 and the moving groove II 1404 on the valve plate sealing plate II 14, driving the valve plate sealing plate I 13 and the valve plate sealing plate II 14 to slide along the valve plate sealing plate guide groove 701 on the valve plate sealing plate mounting base 7, thereby realizing the opening of the downhole safety valve.

[0051] When a well kick or blowout occurs downhole, requiring the downhole safety valve to be closed, the surface control console issues a valve-closing command. The hollow shaft motor 3 rotates in the reverse direction, driving the rotating sleeve 4 to rotate in the reverse direction as well. The straight groove 401 on the rotating sleeve 4 drives the cylindrical boss 201 on the central tube 2 to slide in the groove 501 of the spiral sleeve 5, causing the central tube 2 to rotate in the reverse direction and retract. At this time, the return spring 9 begins to return to its original position, ensuring continuous contact between the valve plate opening / closing control disc 12 and the rotating disc 15 on the central tube 2. Because the transmission boss 1201 is embedded in the rotating disc 1... Within the transmission groove 1501 on the 5, the rotating disk 15 on the central tube 2 can transmit torque to the valve plate opening and closing control disk 12, causing the valve plate opening and closing control disk 12 to rotate. The cylindrical boss II 1203 on the valve plate opening and closing control disk 12 drives the valve plate sealing sheet I 13 and valve plate sealing sheet II 1404 to slide in opposite directions along the valve plate sealing sheet guide groove 701 on the valve plate sealing sheet mounting base 7, thereby achieving the closure of the downhole safety valve.

[0052] When well control operations are required, high-density liquid can be injected into the well. Since the upper pipe wall 203 of the central pipe 2 is thicker than the lower pipe wall 204, the pressure at the upper end of the central pipe is greater than that at the lower end, which in turn pushes the central pipe 2 to rotate forward. Because the transmission protrusion 1201 is embedded in the transmission groove 1501 on the rotating disk 15, the rotating disk 15 on the central pipe 2 can transmit torque to the valve plate opening and closing control disk 12. The cylindrical protrusion II 1203 on the valve plate opening and closing control disk 12 drives the valve plate sealing plate I 13 and the valve plate sealing plate II 14 to slide along the valve plate sealing plate guide groove 701 on the valve plate sealing plate mounting base 7 by squeezing the moving groove I 1304 on the valve plate sealing plate I 13 and the moving groove II 1404 on the valve plate sealing plate II 14. This realizes the opening of the downhole safety valve and completes the well control operation.

[0053] When the cable is damaged or the motor fails, because the helix angle of the groove on the spiral sleeve is greater than the equivalent friction angle, the return spring 9 can still push the valve housing 11 to slide axially along the rectangular groove 605, thereby pushing the central tube 2 to rotate back. Since the transmission protrusion 1201 is embedded in the transmission groove 1501 on the rotating disk 15, the rotating disk 15 on the central tube 2 can transmit torque to the valve plate opening and closing control disk 12. The cylindrical boss II 1203 on the valve plate opening and closing control disk 12 drives the valve plate sealing plate I 13 and the valve plate sealing plate II 14 to slide in opposite directions along the valve plate sealing plate guide groove 701 on the valve plate sealing plate mounting base 7, thereby closing the valve.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to this patent without departing from the spirit and scope of the present invention. Any modifications or partial substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An electrically controlled radially opening and closing downhole safety valve, characterized in that: The system includes an upper connector (1), a central tube (2), a hollow shaft motor (3), a rotating sleeve (4), a spiral sleeve (5), a connecting sleeve (6), a valve plate sealing plate mounting base (7), a lower connector (8), a return spring (9), a cover (10), a valve housing (11), a valve plate opening and closing control disc (12), a valve plate sealing plate I (13), a valve plate sealing plate II (14), a rotating disc (15), and a fixing block (16). The central tube (2) is provided with two cylindrical bosses I (201) and external threads (202). The rotating sleeve (4) is provided with straight grooves (401), and the lower end is circumferentially... The spiral sleeve (5) is provided with a through hole I (402); the spiral sleeve (5) is provided with a sliding groove (501), the spiral helix angle of the sliding groove (501) is greater than the equivalent friction angle; the rotating disk (15) is provided with an internal thread (1502), and the upper end is provided with a transmission groove (1501) evenly distributed around the circumference; the valve plate opening and closing control disk (12) is provided with a sealing groove IV (1204), the upper end is provided with a transmission protrusion (1201) evenly distributed around the circumference, the middle end is provided with an angle limiting groove (1202) evenly distributed, and the lower end is provided with a cylindrical boss II (1203); the valve plate sealing plate I (13) is provided with a sealing groove V (1301). The valve plate sealing plate II (14) is provided with a sealing groove VI (1401), a movable boss II (1402), a sealing protrusion II (1403), a movable groove II (1404), and a flow-blocking protrusion II (1405). The valve plate sealing plate mounting base (7) is provided with a sealing groove III (705). The upper end is circumferentially provided with valve plate sealing plate guide grooves (701), pillars (702), and threaded holes III (704). The lower end is circumferentially provided with threaded holes II (703). The upper connector (1) The hollow shaft motor (3) is installed in the upper connector (1) and the hollow shaft motor (3) is connected by bolts. The spiral sleeve (5) is installed outside the rotating sleeve (4) and the central tube (2) is installed inside the rotating sleeve (4). The cylindrical boss I (201) passes through the straight groove (401) and cooperates with the sliding groove (501) so that when the rotating sleeve (4) rotates, it drives the cylindrical boss I (201) to move along the sliding groove (501), thereby causing the central tube (2) to perform a combined motion of rotation and axial displacement.The internal thread (1502) on the rotating disk (15) is connected to the external thread (202) on the central tube (2). The transmission protrusion (1201) is installed in the transmission groove (1501) on the rotating disk (15). The angle limiting groove (1202) is used to install the column (702) and thus limit the rotation angle of the valve plate opening and closing control disk (12). The valve plate sealing plate I (13) and valve plate sealing plate II (14) are circumferentially alternately installed between the valve plate opening and closing control disk (12) and the valve plate sealing plate mounting base (7). The cylindrical boss II (1203) is installed in the moving groove I (1304) of the valve plate sealing plate I (13) and the moving groove II of the valve plate sealing plate II (14). (1404) Inside, the movable boss I (1302) and movable boss II (1402) are installed in the valve plate sealing guide groove (701), the sealing protrusion I (1303) is installed in the sealing groove VI (1401), the sealing protrusion II (1403) is installed in the sealing groove V (1301), the fixing block (16) is connected to the threaded hole III (704) on the column (702), the valve plate opening and closing control disc (12) is connected to the valve plate sealing mounting base (7), the valve shell (11) is installed in the connecting cylinder (6), the return spring (9) is installed outside the valve shell (11), and the lower connector (8) is connected to the connecting cylinder (6) by threads.

2. The electrically controlled radial opening and closing downhole safety valve according to claim 1, characterized in that: The upper connector (1) is provided with a motor mounting slot (101), a sealing slot I (102) and a cable connection channel (103). The motor mounting slot (101) is used to install a hollow shaft motor (3).

3. The electrically controlled radial opening and closing downhole safety valve according to claim 1, characterized in that: The central tube (2) is provided with an upper tube wall (203) and a lower tube wall (204), wherein the upper tube wall (203) is thicker than the lower tube wall (204).

4. The electrically controlled radial opening and closing downhole safety valve according to claim 1, characterized in that: The connecting cylinder (6) is provided with a sealing plate mounting groove (601), step I (602), step II (603), sealing groove II (604) and rectangular groove (605). The cover (10) is embedded in the sealing plate mounting groove (601), and the valve shell (11) is installed between step I (602) and step II (603).

5. The electrically controlled radial opening and closing downhole safety valve according to claim 1, characterized in that: The valve housing (11) has a circumferential protrusion (1101) at the lower end and through holes II (1102) evenly distributed in the middle. The circumferential protrusion (1101) is installed in a rectangular groove (605). The valve plate sealing plate mounting base (7) is connected to the valve housing (11) by screws.

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