Automatic control repeated leaking stoppage tool

Abstract

The invention relates to the technical field of oil and gas field exploitation equipment, in particular to an automatic control repeated leaking stoppage tool. The automatic control repeated leaking stoppage tool comprises a shell, a soluble opening ball and a soluble closing ball, wherein the two ends of the shell are connected with an upper connector and a lower connector; an activating device, an automatic control system, an inner sleeve, a ball valve mechanism and a ball basket are sequentially arranged in the shell from top to bottom, the opening ball and closing ball input device pushes the activating device to move downwards, and the pushing distance of the closing ball is longer; the automatic control system controls the inner sleeve to rotate to open and close the circulation hole according to the moving distance of the activation device, and the ball valve mechanism synchronously rotates along with the inner cylinder to control a lower runner switch. And the ball basket collects the opening ball and the closing ball to wait for dissolution in the drilling fluid. According to the automatic control repeated plugging tool, when the opening ball and the closing ball are put in, the inner sleeve is controlled to rotate to open and close the circulating hole; the soluble opening ball and the soluble closing ball do not occupy the space in the ball basket any more, and the working frequency is not limited by the containing capacity of the ball basket any more.

Description

Technical Field

[0001] This invention relates to the field of oil and gas field development equipment technology, and in particular to an automatic control tool for multiple leak plugging. Background Technology

[0002] In oilfield well development, plugging tools need to be run into the well along with the downhole tool string. During drilling, if well leakage occurs, plugging operations require opening the tool's circulation port, and after plugging is complete, the circulation port needs to be closed. In existing technologies, plugging tools typically use resin or steel balls to open and close the circulation port. The balls are collected in the tool's basket. The number of times the tool can open and close the circulation port depends on the basket's capacity. Generally, the basket reaches its capacity limit after 4-6 opening and closing operations, making further plugging impossible. In leak-prone areas where well leakage accidents occur frequently, the limited capacity of the basket is insufficient to support the required number of plugging operations over a long period. Therefore, to address these shortcomings, an automatically controlled multiple-operation plugging tool is proposed. Summary of the Invention

[0003] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an automatically controlled multiple-time leak-sealing tool, which solves the problem that the number of times the loop hole can be switched on and off in existing leak-sealing tools is limited by the capacity of the basket, making it unsuitable for long-term operation in leak-prone areas.

[0004] (II) Technical Solution To address the aforementioned problems, this invention provides an automatic control multiple-stage leak-sealing tool, comprising: a housing, with an upper connector and a lower connector respectively at the upper and lower ends of the housing, and further comprising: An open ball and a close ball, wherein the open ball and the close ball are soluble balls, and the diameter of the close ball is larger than that of the open ball; An activation device is provided inside the housing, and an automatic control system is located below the activation device. When a closing ball and an opening ball are inserted into the housing, they push the activation device downwards, and the distance that the closing ball pushes the activation device to move is greater than that of the opening ball. Below the automatic control system is an inner sleeve, and there are corresponding inner and outer circulation holes between the inner sleeve and the housing. The automatic control system rotates the inner sleeve according to the moving distance of the activation device to control the opening and closing of the circulation holes. Below the inner sleeve is a ball valve mechanism, which is connected to the inner sleeve and rotates with the inner sleeve. Above the lower connector inside the housing is a ball basket, which collects and retains the opening and closing balls until they dissolve. The surface of the ball basket has evenly distributed flow channels.

[0005] Preferably, the activation device includes an upper claw-shaped ball seat and a lower claw-shaped ball seat, with the upper claw-shaped ball seat located above the lower claw-shaped ball seat and the bottom end of the upper claw-shaped ball seat contacting the top end of the lower claw-shaped ball seat; the upper and lower claw-shaped ball seats expand outward in the circumferential direction under force, and the maximum inner diameter of the lower claw-shaped ball seat is greater than the maximum inner diameter of the upper claw-shaped ball seat; the bottom end of the lower claw-shaped ball seat is provided with a magnetic block to cooperate with the automatic control system; the inner diameter of the upper claw-shaped ball seat is smaller than the diameter of the opening ball, and the inner diameter of the lower claw-shaped ball seat is larger than the diameter of the opening ball and smaller than the diameter of the closing ball; the downward stroke of the lower claw-shaped ball seat is greater than the downward stroke of the upper claw-shaped ball seat.

[0006] Preferably, an upper spring is vertically arranged between the bottom end of the upper claw-shaped ball seat and the inner wall of the housing, and a lower spring is vertically arranged between the bottom end of the lower claw-shaped ball seat and the automatic control system; the inner wall of the housing is provided with an upper expansion groove and a lower expansion groove that are recessed in the circumferential direction below the upper claw-shaped ball seat and the lower claw-shaped ball seat, respectively. The dimensions of the upper expansion groove and the lower expansion groove correspond to the upper claw-shaped ball seat and the lower claw-shaped ball seat, respectively. The distance between the lower expansion groove and the lower claw-shaped ball seat is greater than the distance between the upper expansion groove and the upper claw-shaped ball seat.

[0007] Preferably, the outer walls of the upper claw-shaped ball seat and the lower claw-shaped ball seat are provided with annular spring shoulders that protrude circumferentially, and the upper spring and the lower spring are installed between the corresponding spring shoulders and the housing.

[0008] Preferably, both the upper claw-shaped ball seat and the lower claw-shaped ball seat have circumferentially protruding ball seat shoulders on their top outer walls; the bottom end of the upper expansion groove has a shell shoulder, the diameter of which is smaller than the outer diameter of the ball seat shoulder, and the maximum inner diameter of the upper claw-shaped ball seat after falling into the upper expansion groove is greater than the diameter of the closing ball; a limiting sleeve is provided in the lower expansion groove, the bottom end of which contacts the automatic control system; the top end of the limiting sleeve has a limiting sleeve upper end face, which extends upward into the lower expansion groove to restrict the movement of the lower claw-shaped ball seat.

[0009] Preferably, a plurality of limiting pins are evenly provided between the limiting sleeve and the housing, and the limiting sleeve and the housing are connected by the limiting pins.

[0010] Preferably, the automatic control system is a tubular structure with a through-flow channel in the middle. The sidewall of the automatic control system contains, from top to bottom, a control chamber, a motor chamber, an oil pump chamber, and an execution module, all arranged in a uniform ring shape. The control chamber contains an automatic control device, the motor chamber contains an electric motor, and the oil pump chamber contains a gear pump. The execution module contains a first and a second oil port, which are separated from each other and adjustable in size. Below the gear pump are a first oil tank and a second oil tank, respectively connected to the first and second execution module oil ports. The electric motor drives the gear pump to rotate, controlling the flow of pressurized oil between the first and second execution module oil ports, thus driving the execution module to rotate.

[0011] Preferably, the control cavity is equipped with a control chip, a power supply, and a first Hall sensor and a second Hall sensor arranged sequentially from top to bottom. The power supply, the first Hall sensor, and the second Hall sensor are all connected to the control chip, and the control chip is connected to the motor. After receiving a signal, the first Hall sensor drives the motor to rotate and open the circulation hole through the control chip. After receiving a signal, the second Hall sensor drives the motor to rotate and close the circulation hole through the control chip.

[0012] Preferably, the motor includes a motor stator and a motor rotor. The motor stator is fixed in position and connected to the control chip, and the motor rotor is sleeved inside the motor stator and its bottom end is connected to the gear pump.

[0013] Preferably, the gear pump includes an annular internal gear and a gear pump housing. The gear pump housing is fitted over the outside of the internal gear. Multiple driving teeth are evenly arranged on the outer wall of the internal gear, and the internal gear is connected to a motor. Multiple external gears with fixed positions are evenly arranged circumferentially along the outer edge of the internal gear, and driven teeth that cooperate with the driving teeth are evenly arranged on the surface of the external gears. At each contact position between the external gear and the internal gear, the inner wall of the gear pump housing has a first gear pump oil port on the right side of each external gear and a second gear pump oil port on the left side of each external gear. The first gear pump oil port and the second gear pump oil port are respectively connected to a first oil tank and a second oil tank.

[0014] Preferably, a gear pump bearing is provided between the inner wall of the internal gear and the inner wall of the oil pump cavity.

[0015] Preferably, the execution module includes a fixed sleeve and a rotating sleeve; the fixed sleeve consists of inner and outer pipe walls and is sealed at the bottom, forming an annular oil storage space between the two pipe walls, and the inner pipe wall has a protruding oil dividing plate with an incomplete annular shape; the rotating sleeve is a single layer, and the inner wall has a fan-shaped structure that cooperates with the oil storage space. It is inserted into the oil storage space from top to bottom and cooperates with the oil dividing plate to divide the oil storage space into a first execution module oil port and a second execution module oil port that are not connected to each other.

[0016] Preferably, the bottom end of the outer edge of the rotating sleeve is provided with a plurality of downwardly extending rotating sleeve handles.

[0017] Preferably, the outer wall of the inner sleeve is provided with an inner circulation hole corresponding to the position of the outer circulation hole; the top of the inner sleeve is provided with an annular protruding stepped structure, the height and diameter of which correspond to the size of the rotating sleeve handle; the side wall of the step is provided with a through pin hole corresponding to the position of the rotating sleeve handle, and a sleeve pin is provided in the pin hole to connect the inner sleeve and the rotating sleeve handle.

[0018] Preferably, the ball valve mechanism includes an upper ball valve connector and a lower ball valve connector. The top end of the upper ball valve connector is connected to the inner sleeve, and the top end of the lower ball valve connector is inserted into the inner wall of the bottom end of the upper ball valve connector and fixedly connected to the upper ball valve connector. The upper ball valve connector and the lower ball valve connector are provided with a through flow channel, and the lower ball valve connector is provided with a rotatable ball. The ball has a through hole in the middle that is concentric with the flow channel and has the same diameter.

[0019] Preferably, the surface of the ball has symmetrical mounting planes on the left and right sides with the through hole as the center, and a ball rotating pin is provided at the center of the mounting plane. One end of the ball rotating pin is inserted into the mounting plane and the other end is inserted into the inner wall of the lower connector of the ball valve, and the ball rotates around the ball rotating pin.

[0020] Preferably, the mounting plane has a cross-shaped rotating groove centered on the ball rotating pin, and a ball valve fork is provided at a position on the inner wall of the housing corresponding to the position of the rotating groove. One end of the ball valve fork is fixed to the inner wall of the housing, and the other end passes through the upper ball valve connector and the lower ball valve connector and extends into the rotating groove. The upper ball valve connector and the lower ball valve connector are provided with fork grooves arranged circumferentially and corresponding to the positions of the ball valve forks.

[0021] Preferably, the upper and lower ends of the ball are respectively provided with upper and lower sealing elements for the upper and lower connectors of the ball valve.

[0022] (III) Beneficial Effects The automatic control multiple plugging tool provided by this invention controls the inner sleeve to rotate and open and close the circulation hole when the opening and closing balls are deployed, through the cooperation of an activation device and an automatic control system. The opening and closing balls are made of a soluble material, and after deployment, they gradually dissolve downhole, no longer occupying space in the ball basket. The number of times the device opens and closes the circulation hole is no longer limited by the capacity of the ball basket, and it can adapt to the working needs in leaky areas. Attached Figure Description

[0023] Figure 1 This is a structural diagram of the automatic control multiple leak sealing tool of the present invention; Figure 2 Figure a is a structural diagram of the activation device for the automatic control multiple sealing tool of the present invention, wherein Figure a is a structural diagram of the upper claw-type ball seat and Figure b is a structural diagram of the lower claw-type ball seat; Figure 3 This is a structural diagram of the claw-shaped ball seat of the automatic control multiple leak-sealing tool of the present invention; Figure 4 This is a structural diagram of the automatic control system for the automatic multiple-stopping tool of the present invention; Figure 5 This is a structural diagram of the gear pump in the automatic control multiple leak-sealing tool of the present invention; Figure 6This is a structural diagram of the actuator of the automatic control multiple leak-sealing tool of the present invention. Figure 7 This is an anatomical diagram of the actuator of the automatic control multiple leak sealing tool of the present invention, wherein Figure a is the fixed sleeve and Figure b is the rotating sleeve; Figure 8 This is a structural diagram of the inner sleeve of the automatic control multiple leak-sealing tool of the present invention; Figure 9 This is a structural diagram of the ball valve mechanism of the automatic control multiple leak-sealing tool of the present invention; Figure 10 This is a diagram of the basket structure of the automatic control multiple-stopping tool of the present invention; Figure 11 This is a structural diagram of the housing of the automatic control multiple leak sealing tool of the present invention; Figure 12 This is a diagram showing the connection between the fixed sleeve and the inner sleeve of the automatic control multiple leak-sealing tool of the present invention.

[0024] The components include: 1. Upper connector; 2. Housing; 3. Upper claw-type ball seat; 4. Lower claw-type ball seat; 5. Automatic control system; 6. Inner sleeve; 7. Ball valve mechanism; 8. Ball basket; 9. Lower connector; 10. Housing shoulder; 11. Upper spring; 12. Lower spring; 13. Limiting sleeve; 14. Upper end face of the limiting sleeve; 15. Magnetic block; 16. Limiting pin; 17. Ball seat shoulder; 18. Spring shoulder; 19. First Hall sensor; 20. Second Hall sensor; 21. Control chip; 22. Power supply; 23. Motor stator; 24. Motor rotor; 25. Gear pump; 26. First oil tank; 27. Second oil tank; 28. Actuation module. ; 29. ​​Gear pump internal gear; 30. Gear pump external gear; 31. Gear pump bearing; 32. First gear pump oil port; 33. Second gear pump oil port; 34. Gear pump housing; 35. Fixed sleeve; 36. Rotating sleeve; 37. Rotating sleeve handle; 38. First actuator module oil port; 39. Second actuator module oil port; 41. Ball valve upper connector; 42. Ball valve lower connector; 43. Ball; 44. Ball valve fixed pin; 45. Ball rotating pin; 46. Ball valve shift fork; 47. Upper seal; 48. Lower seal; 49. External circulation hole; 50. Opening ball; 51. Closing ball; 52. Internal circulation hole; 53. Sleeve pin. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, 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.

[0026] In the description of this invention, it is necessary to understand that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", "top", and "bottom" are based on the orientation or positional relationship shown in the accompanying drawings. The purpose is only to facilitate the description of this invention and to simplify the description. It is not intended to indicate or imply that the component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0027] like Figure 1-12 As shown, the present invention provides an automatic control multiple leak sealing tool, specifically comprising: a housing 2, wherein the upper and lower ends of the housing 2 are respectively provided with an upper connector 1 and a lower connector 9, characterized in that it includes: The device includes an opening ball 50 and a closing ball 51, both of which are soluble balls, with the closing ball 51 having a larger diameter than the opening ball 50. The opening and closing balls 50 and 51 operate independently of the device. During operation, when the device needs to change the state of the circulation hole, the opening and closing balls 50 and 51 are inserted into the device from the wellhead to activate the device. The opening and closing balls 50 and 51 are made of a soluble material, allowing them to gradually dissolve in the drilling fluid after activation. This process does not occupy internal space or affect the normal operation of the device or other components in the tool string. Typically, the opening and closing balls 50 and 51 are made of magnesium-aluminum alloy, which gradually dissolves in the chloride-containing drilling fluid within the well.

[0028] An activation device is provided inside the housing 2, and an automatic control system 5 is located below the activation device. A closing ball 51 and an opening ball 50 are inserted into the housing 2, pushing the activation device downwards. The distance the closing ball 51 pushes the activation device to move is greater than that of the opening ball 50. The automatic control system 5 and the activation device cooperate. Depending on the diameter of the inserted closing ball 51 and opening ball 50, the activation device moves downwards a different distance within the tool. The automatic control system 5 detects the movement distance of the activation device and controls the device below to perform different working states based on the different movement distances, thereby opening and closing the circulation hole.

[0029] The automatic control system 5 has an inner sleeve 6 below it. Between the inner sleeve 6 and the housing 2, there are corresponding inner circulation holes 52 and 49. The automatic control system 5 rotates the inner sleeve 6 according to the moving distance of the activation device to control the opening and closing of the circulation holes. The circulation holes of the device are jointly formed by the inner circulation hole 52 on the outer wall of the inner sleeve 6 and the outer circulation hole 49 of the housing 2. When the two are aligned, the circulation holes open to establish a circulation channel; otherwise, the circulation holes and circulation channels close. When the automatic control system 5 detects that the activation device has moved downwards too shallowly, it controls the inner sleeve 6 to rotate to align the inner circulation hole 52 with the outer circulation hole 49, thereby opening the circulation channel. When the automatic control system 5 detects that the activation device has moved downwards too deeply, it controls the inner sleeve 6 to rotate to separate the inner circulation hole 52 from the outer circulation hole 49, thereby closing the circulation channel. To accurately control the moving distance of the activation device, the downward movement distance of the activation device is related to the diameter of the inserted ball. A larger diameter closing ball 51 pushes the activation device a longer distance than an opening ball 50.

[0030] Additionally, a ball valve mechanism 7 is provided below the inner sleeve 6. The ball valve mechanism 7 is connected to the inner sleeve 6 and rotates with the inner sleeve 6. The ball valve mechanism 7 can control the opening and closing of the fluid channel below the inner sleeve 6. When the circulation hole is open, it blocks the fluid channel below the inner sleeve 6, so that the drilling fluid injected above can only flow out from the circulation hole. When the circulation hole is closed, it opens the fluid channel below the inner sleeve 6 to restore the fluid channel of the tool string.

[0031] Inside the casing 2, above the lower connector 9, is a ball basket 8. The ball basket 8 collects and retains the opening ball 50 and the closing ball 51 until they dissolve. The surface of the ball basket 8 has evenly distributed flow channels. After the ball dropping operation, the opening ball 50 and the closing ball 51 move downwards and finally fall into the ball basket 8. While the ball basket 8 collects the dropped opening ball 50 and the closing ball 51, the drilling fluid injected into the device flows downwards through the flow channels on the surface of the ball basket 8, thus collecting the opening ball 50 and the closing ball 51 without affecting the normal flow of drilling fluid in the well.

[0032] In this invention, the activation device includes an upper claw-shaped ball seat 3 and a lower claw-shaped ball seat 4. The upper claw-shaped ball seat 3 is located above the lower claw-shaped ball seat 4, and the bottom end of the upper claw-shaped ball seat 3 is in contact with the top end of the lower claw-shaped ball seat 4. The upper claw-shaped ball seat 3 and the lower claw-shaped ball seat 4 expand outward in the circumferential direction under force. The maximum inner diameter of the lower claw-shaped ball seat 4 is greater than the maximum inner diameter of the upper claw-shaped ball seat 3. The inner diameter of the upper claw-shaped ball seat 3 is smaller than the diameter of the opening ball 50, and the inner diameter of the lower claw-shaped ball seat 4 is larger than the diameter of the opening ball 50 and smaller than the diameter of the closing ball 51. The downward stroke of the lower claw-shaped ball seat 4 is greater than the downward stroke of the upper claw-shaped ball seat 3. When dropping balls into the well, because the diameter of the upper claw-shaped ball seat 3 is smaller than the diameter of the opening ball 50, both the opening ball 50 and the closing ball 51 will push the upper claw-shaped ball seat 3 downwards upon contact with it. The upper claw-shaped ball seat 3 will then push the lower claw-shaped ball seat 4 downwards simultaneously until the upper claw-shaped ball seat 3 reaches its maximum travel and expands. The expanded diameter is larger than the diameter of the closing ball 51, at which point either the opening ball 50 or the closing ball 51 can pass downwards through the upper claw-shaped ball seat 3. When the opening ball 50 is dropped, because the inner diameter of the lower claw-shaped ball seat 4 is larger than the diameter of the opening ball 50, the opening ball 50 will directly pass through the lower claw-shaped ball seat 4 and continue moving downwards. During this process, the lower claw-shaped ball... The downward movement distance of seat 4 is the stroke of upper claw-type ball seat 3. When the closing ball 51 is engaged, since the diameter of closing ball 51 is larger than the inner diameter of lower claw-type ball seat 4, closing ball 51 first falls on upper claw-type ball seat 3, pushing upper claw-type ball seat 3 downward. When the ball seat shoulder 17 reaches the position of housing shoulder 10, ball seat shoulder 17 is opened. At this time, closing ball 51 falls on lower claw-type ball seat 4 through the opened upper claw-type ball seat 3 and pushes it downward until lower claw-type ball seat 4 moves to the position of upper end face 14 of the limiting sleeve, i.e., the maximum stroke, and expands. At this time, closing ball 51 passes through the expanded lower claw-type ball seat 4. During this process, the moving distance of lower claw-type ball seat 4 is the maximum stroke of lower claw-type ball seat 4. Thus, when closing ball 51 is engaged, the moving distance of the activation device detected by automatic control system 5 is longer, thereby distinguishing the signals detected and sent by automatic control system 5 when closing ball 51 is engaged and opening ball 50 is engaged, so that opening ball 50 and closing ball 51 can control automatic control system 5 to perform different actions respectively.

[0033] To ensure the accuracy and stability of signal transmission between the activation device and the automatic control system during downhole operations, a magnetic block 15 is installed at the bottom of the lower claw-shaped ball seat 4 to cooperate with the automatic control system 5. As the magnetic block 15 moves with the lower claw-shaped ball seat 4, the magnetic field signal changes wherever it goes. The automatic control system 5 determines the maximum distance that the lower claw-shaped ball seat 4, i.e., the activation device, moves when it is activated by detecting the position reached by the magnetic block 15 during its movement.

[0034] The upper claw-shaped ball seat 3 has a vertically arranged upper spring 11 between its bottom end and the inner wall of the housing 2, and the lower claw-shaped ball seat 4 has a vertically arranged lower spring 12 between its bottom end and the automatic control system 5. The inner wall of the housing 2 has circumferentially recessed upper and lower expansion grooves below the upper claw-shaped ball seat 3 and lower claw-shaped ball seat 4, respectively. The dimensions of the upper and lower expansion grooves correspond to those of the upper claw-shaped ball seat 3 and lower claw-shaped ball seat 4, and the distance between the lower expansion groove and the lower claw-shaped ball seat 4 is greater than the distance between the upper expansion groove and the upper claw-shaped ball seat 3. The upper spring 11 and lower spring 12 are located between the two claw-shaped ball seats and the housing 2. After the ball-throwing operation is completed, the upper spring 11 and lower spring 12 can use their own elasticity to push the upper claw-shaped ball seat 3 and lower claw-shaped ball seat 4 upwards to push them back to their original positions, thus resetting the device. This allows the device to repeat the ball-throwing-action-reset process in subsequent operations. The timing of the expansion of the upper claw-shaped ball seat 3 and the lower claw-shaped ball seat 4 is controlled by the upper and lower expansion grooves. Changing the distance between the two expansion grooves and the claw-shaped ball seat can control the movement stroke of the upper claw-shaped ball seat 3 and the lower claw-shaped ball seat 4 during the throwing process. In order to ensure that the opening ball 50 and the closing ball 51 can pass smoothly, the diameter of the upper expansion groove and the lower expansion groove needs to meet the requirement that the inner diameter of the upper claw-shaped ball seat 3 and the lower claw-shaped ball seat 4 after expansion is greater than the diameter of the closing ball 51.

[0035] The outer walls of the upper claw-shaped ball seat 3 and the lower claw-shaped ball seat 4 are provided with annular spring shoulders 18 that protrude circumferentially. The upper spring 11 and the lower spring 12 are installed between the corresponding spring shoulders 18 and the housing 2. By installing the upper spring 11 and the lower spring 12 between the spring shoulders 18 and the housing 2, the elasticity of the upper spring 11 and the lower spring 12 pushes the spring shoulders 18 to push the upper claw-shaped ball seat 3 and the lower claw-shaped ball seat 4 to their original positions.

[0036] It should be noted that both the upper claw-shaped ball seat 3 and the lower claw-shaped ball seat 4 have circumferentially protruding ball seat shoulders 17 on their top outer walls; the bottom end of the upper expansion groove has a housing shoulder 10, the diameter of which is smaller than the outer diameter of the ball seat shoulder 17, and the maximum inner diameter of the upper claw-shaped ball seat 3 after falling into the upper expansion groove is greater than the diameter of the closing ball 51; a limiting sleeve 13 is provided in the lower expansion groove, and the bottom end of the limiting sleeve 13 contacts the automatic control system 5; the top end of the limiting sleeve 13 has a limiting sleeve upper end face 14, which extends upward into the lower expansion groove to restrict the movement of the lower claw-shaped ball seat 4. Through the cooperation of the housing shoulder 10 and the ball seat shoulder 17, the movement distance of the upper claw-shaped ball seat 3 can be limited, avoiding the automatic control system 5 from reading incorrect position information due to the excessive distance the upper claw-shaped ball seat 3 moves under the push of the drilling fluid after the opening ball 50 is deployed. The limiting sleeve 13 is installed inside the housing 2, and its outer wall extends upward along the inner wall of the housing 2 so that the upper end face 14 of the limiting sleeve extends into the lower expansion groove, thereby limiting the movement distance of the lower claw-shaped ball seat 4. When the ball seat shoulder 17 of the lower claw-shaped ball seat 4 contacts the upper end face 14 of the limiting sleeve, the lower claw-shaped ball seat 4 stops moving downward. After the limiting sleeve 13 is installed, the limiting sleeve 13 replaces the housing 2 in contact with the lower spring 12. The top end of the lower spring 12 contacts the ball seat shoulder 17 of the lower claw-shaped ball seat 4, and the bottom end contacts the upper end face 14 of the limiting sleeve. A plurality of limiting pins 16 are evenly provided between the limiting sleeve 13 and the housing 2, and the limiting sleeve 13 and the housing 2 are connected by the limiting pins 16.

[0037] like Figure 4-6As shown, the automatic control system 5 is tubular with a through-flow channel in the middle. The sidewall of the automatic control system 5 contains, from top to bottom, a control chamber, a motor chamber, an oil pump chamber, and an execution module 28, all arranged in a uniform ring shape. The control chamber contains an automatic control device, the motor chamber contains an electric motor, and the oil pump chamber contains a gear pump 25. The execution module 28 contains a first execution module oil port 38 and a second execution module oil port 39, which are separated from each other and adjustable in size. Below the gear pump 25 are a first oil tank 26 and a second oil tank 27, respectively connected to the first execution module oil port 38 and the second execution module oil port 39. The electric motor drives the gear pump 25 to rotate, controlling the flow of pressure oil between the first execution module oil port 38 and the second execution module oil port 39, thus driving the execution module 28 to rotate. The automatic control system 5 is tubular with a hollow interior. The inner wall is divided into multiple annular cavities according to operational needs, and corresponding equipment is installed within each cavity. This streamlines the automatic control system 5 within the annular space, allowing for control of the inner sleeve 6's rotation without affecting the drilling fluid flow within the device. After the ball is dropped into the well, the magnetic block 15 at the bottom of the device is activated, passing through the control cavity. The automatic control device within the control cavity detects the position of the magnetic block 15 and controls the motor to drive the gear pump 25, causing the pressurized oil in the first oil tank 26 and the second oil tank 27 to flow between the first execution module port 38 and the second execution module port 39, thereby driving the execution module 28 to rotate.

[0038] The control cavity contains a control chip 21, a power supply 22, and a first Hall sensor 19 and a second Hall sensor 20 arranged sequentially from top to bottom. The power supply 22, the first Hall sensor 19, and the second Hall sensor 20 are all connected to the control chip 21, which is connected to a motor. Upon receiving a signal, the first Hall sensor 19 drives the motor to rotate and open the circulation hole via the control chip 21. Upon receiving a signal, the second Hall sensor 20 drives the motor to rotate and close the circulation hole via the control chip 21. During operation, the first Hall sensor 19 and the second Hall sensor 20 detect the downward movement distance of the activation device. During operation, because the downward movement distance of the lower claw-shaped ball seat 4 is relatively short when the opening ball 50 is inserted, the installation position of the first Hall sensor 19 corresponds to the lowest point of the bottom of the activation device, i.e., the lowest point of the downward movement of the magnetic block 15, when the opening ball 50 is inserted. Similarly, the installation position of the second Hall sensor 20 corresponds to the lowest point of the bottom of the activation device, i.e., the lowest point of the downward movement of the magnetic block 15, when the closing ball 51 is inserted. After the first Hall sensor 19 transmits a signal, the control chip 21 drives the motor and gear pump 25 to rotate the sleeve 6, aligning the inner circulation hole 52 and the outer circulation hole 49 to open the circulation channel. If the first Hall sensor 19 and the second Hall sensor 20 send signals to the control chip 21 successively, the control chip 21 drives the motor and gear pump 25 to rotate the sleeve 6 through the execution module 28, separating the inner circulation hole 52 from the outer circulation hole 49 and closing the circulation channel. To ensure that the opening ball 50 and closing ball 51 have reached the bottom under the push of the drilling fluid when the lower sleeve 6 and ball valve mechanism 7 are activated, the control chip 21 usually waits one minute after receiving the signals from the first Hall sensor 19 and the second Hall sensor 20 before sending a control signal to the lower motor.

[0039] When the opening ball 50 is inserted into the well, the magnetic block 15 at the bottom of the activation device moves downward to the first Hall sensor 19 and then stops and resets. Only the first Hall sensor 19 receives the magnetic field change caused by the magnetic block 15 and sends a signal to the control chip 21, causing the control chip 21 to control the inner sleeve 6 to rotate and open the circulation channel. When the closing ball 51 is inserted, the bottom of the activation device, i.e. the magnetic block 15, moves downward to the second Hall sensor 20. At this time, the first Hall sensor 19 and the second Hall sensor 20 detect the magnetic block 15 passing by and send a control signal to the control chip 21. The control signal 21 controls the motor and gear pump 25 to rotate, driving the inner sleeve 6 to rotate and separate the positions of the inner circulation hole 52 and the outer circulation hole 49, thereby closing the circulation hole.

[0040] The electric motor includes a stator 23 and a rotor 24. The stator 23 is fixed in position and connected to the control chip 21. The rotor 24 is fitted inside the stator 23 and its bottom end is connected to the gear pump 25. The stator 23 is fixed inside the motor cavity and contacts the outer inner wall. The rotor 24 is fitted inside the stator 23. Power from the power supply 22 is supplied to the stator 23, and the rotor 24 is driven to rotate around the inner wall of the annular motor cavity using the principle of electromagnetic induction. The control chip 21 can control the rotor 24 to rotate forward, reverse, and stop. To prevent wear on the rotor 24, a motor bearing is provided between the rotor 24 and the inner wall of the motor cavity to reduce friction between them.

[0041] The gear pump 25 includes an annular internal gear 29 and a gear pump housing 34. The gear pump housing 34 is fitted around the outside of the internal gear 29. Multiple driving teeth are evenly arranged on the outer wall of the internal gear 29, and the internal gear 29 is connected to a motor. Multiple fixed external gears 30 are evenly arranged circumferentially along the outer edge of the internal gear 29. Driven teeth that cooperate with the driving teeth are evenly arranged on the surface of the external gears 30. At the contact position between each external gear 30 and the internal gear 29, the inner wall of the gear pump housing 34 is provided with a first gear pump oil port 32 on the right side of each external gear 30 and a second gear pump oil port 33 on the left side of each external gear 30. The first gear pump oil port 32 and the second gear pump oil port 33 are respectively connected to the first oil tank 26 and the second oil tank 27. The internal gear 29 is connected to the motor rotor 24. When the motor rotor 24 rotates, it drives the internal gear 29 to rotate synchronously. The internal gear drives the surrounding external gears 30 to rotate through the engagement of the driving and driven teeth on its surface. While rotating, the external gears drive the pressurized oil to flow between the first gear pump port 32 and the second gear pump port 33 according to the direction of rotation, thereby allowing the pressurized oil to flow between the first oil tank 26 and the second oil tank 27. Normally, the first oil tank 26 and the second oil tank 27 are annular and concentrically arranged. The first oil tank 26 is located inside the second oil tank 27, and the two are separated. The top of the first oil tank 26 has a communication port with each of the first gear pump ports 32, and the top of the second oil tank 27 has a communication port with each of the second gear pump ports 33. The multiple external gears 30 work together to improve the pumping efficiency of the gear pump 25 and increase the response speed of the device. To avoid friction between the internal gear 29 and the inner wall of the oil pump cavity, a gear pump bearing 31 is provided between the inner wall of the internal gear 29 and the inner wall of the oil pump cavity to reduce the friction between them.

[0042] In this invention, the execution module 28 includes a fixed sleeve 35 and a rotating sleeve 36. The fixed sleeve 35 consists of inner and outer pipe walls and is sealed at the bottom, forming an annular oil storage space between the two pipe walls. The inner pipe wall has protruding oil-distributing plates that are not fully annular in shape. The rotating sleeve 36 is a single layer, and its inner wall has a fan-shaped structure that cooperates with the oil storage space. It is inserted into the oil storage space from top to bottom and cooperates with the oil-distributing plates to divide the oil storage space into a first execution module oil port 38 and a second execution module oil port 39 that are not connected to each other. Figure 6-7 As shown, after the rotating sleeve 36 is fitted downward into the fixed sleeve 35, the protruding fan-shaped structure with its bottom surface overlapping the bottom surface of the rotating sleeve 36 is inserted into the annular oil storage space to fill the oil storage space. In the filled oil storage space, the remaining part is divided into two non-contact oil ports by the oil dividing plate, namely the first execution module oil port 38 and the second execution module oil port 39. After aligning and fixing the inner wall of the fixed sleeve 35 with the inner wall of the automatic control system 5, pressurized oil is injected into the first execution module oil port 38 or the second execution module oil port 39 as needed. The pressure of the pressurized oil can drive the rotating sleeve 36 to rotate and expand the corresponding oil port, thereby realizing the control of the rotating sleeve 36 to rotate as needed.

[0043] The first oil tank 26 is connected to the first execution module oil port 38 at its bottom end, and the second oil tank 27 is connected to the second execution module oil port 39. These two connections are located on the left and right sides of the middle oil distribution plate of the fixed sleeve 35, ensuring that the first oil tank 26 and the second oil tank 27 remain connected to the first execution module oil port 38 and the second execution module oil port 39 respectively, regardless of the size changes of the two oil ports. The bottom end of the outer edge of the rotating sleeve 36 is uniformly provided with multiple downward-extending rotating sleeve handles 37, used to connect with the inner sleeve 6 and drive the inner sleeve 6 to rotate synchronously. Correspondingly, the bottom end of the fixed sleeve 35 is provided with a sleeve rotation groove corresponding to the shape and movement trajectory of the rotating sleeve handles 37, and the sleeve rotation handles 37 connect downwards to the inner sleeve 6 through the sleeve rotation groove.

[0044] like Figure 8 As shown, the outer wall of the inner sleeve 6 is provided with an inner circulation hole 52 corresponding to the position of the outer circulation hole 49; the top of the inner sleeve 6 is provided with an annular raised stepped structure, the height and diameter of which correspond to the size of the rotating sleeve handle 37; a through pin hole 40 is provided on the side wall of the step corresponding to the position of the rotating sleeve handle 37, and a sleeve pin 53 is provided in the pin hole 40 to connect the inner sleeve 6 and the rotating sleeve handle 37. The top of the inner sleeve 6 is connected to the rotating sleeve handle 37 and the inner sleeve 6 through the sleeve pin 53 and the pin hole 40, so that the inner sleeve 6 can rotate synchronously with the rotation of the rotating sleeve 36 during operation. The stepped structure at the top of the inner sleeve 6 can be tightly combined with the execution module 28 to prevent drilling fluid from flowing out from the gap between the execution module 28 and the inner sleeve 6, thereby improving the sealing performance of the device.

[0045] like Figure 9 As shown, the ball valve mechanism 7 includes an upper ball valve connector 41 and a lower ball valve connector 42. The top end of the upper ball valve connector 41 is connected to the inner sleeve 6, and the top end of the lower ball valve connector 42 is inserted into the inner wall of the bottom end of the upper ball valve connector 41 and fixedly connected to it. Both the upper and lower ball valve connectors 41 and 42 have through-flow channels. The lower ball valve connector 42 has a rotatable ball 43, with a through hole in the middle that is concentric with the flow channel and has the same diameter. The connection of the upper and lower ball valve connectors 41 and 42 forms the main body of the ball valve mechanism 7. After the upper ball valve connector 41 is connected to the bottom end of the inner sleeve 6, the main body of the ball valve can rotate with the rotation of the inner sleeve 6. The ball 43 is located inside the lower connector 42 of the ball valve. Rotating the ball 43 so that the through hole in the middle of the ball 43 is aligned with the flow channel will open the ball valve mechanism 7 and connect the upper and lower channels. Similarly, rotating the ball 43 so that it blocks the flow channel inside the lower connector 42 of the ball valve will close the ball valve mechanism 7. At this time, the drilling fluid in the tool can only flow out from the upper circulation hole.

[0046] The ball 43 has symmetrical mounting planes on its surface, centered on the through hole. A rotating pin 45 is positioned at the center of each mounting plane. One end of the rotating pin 45 is inserted into the mounting plane, and the other end is inserted into the inner wall of the lower connector 42 of the ball valve. The ball 43 rotates around the rotating pin 45. The rotating pin 45 fixes the position and direction of rotation of the ball 43, facilitating control over its rotation direction.

[0047] A cross-shaped rotating groove is provided on the mounting plane on both sides of the ball 43 with the ball rotating pin 45 as the center. A ball valve fork 46 is provided on the inner wall of the housing 2 at a position corresponding to the rotating groove. One end of the ball valve fork 46 is fixed to the inner wall of the housing 2, and the other end passes through the upper ball valve connector 41 and the lower ball valve connector 42 and extends into the rotating groove. The upper ball valve connector 41 and the lower ball valve connector 42 are provided with fork grooves arranged circumferentially and corresponding to the positions of the ball valve forks 46. Since the position of the ball valve fork 46 is fixed, when the sleeve 6 drives the upper ball valve connector 41 and the lower ball valve connector 42 to rotate, the end of the ball valve fork 46 inserted into the rotating groove will move horizontally along the fork groove relative to the upper ball valve connector 41 and the lower ball valve connector 42. During the movement, the end of the ball valve fork 46 inserted into the rotating groove will contact the inner wall of the rotating groove and push the inner wall of the rotating groove along the direction of movement. At this time, the inner wall of the rotating groove will be subjected to force, which will cause the ball to rotate around the ball rotating pin 45 located at the center of the rotating groove. As the ball 43 and the mounting planes on both sides rotate, the end of the ball valve fork 46 inserted into the rotating groove will move up and down along the rotating groove in the rotating groove, but the position of the ball valve fork 46 remains unchanged.

[0048] To prevent poor sealing at the contact points between the ball 43 and the upper ball valve connector 41 and the lower ball valve connector 42, upper sealing elements 47 and lower sealing elements 48 are respectively provided at the upper and lower ends of the ball 43, corresponding to the upper ball valve connector 41 and the lower ball valve connector 42, thereby improving the sealing performance of the device. During processing, to save materials and maintain unobstructed flow, the ball 43 can be machined into a hemispherical shape, with a cylindrical through hole of the same diameter as the flow channel drilled at the center of the plane in the middle of the hemisphere. During normal operation, the through hole coincides with the flow channel. When it is necessary to close the ball valve mechanism 7, simply rotating the ball 43 by 90° will block the flow channel.

[0049] In order to accommodate the rotation of the ball 43 inside the ball valve mechanism 7, the rotation stroke of the rotating sleeve 36 and the inner cylinder 6 is usually 90°.

[0050] The automatic control multiple plugging tool provided by this invention can repeatedly open and close the circulation port downhole without being limited by the capacity of the basket. The specific operation process of this device is as follows: Step 1: Assemble the device according to its structure and install it on the tool string, then lower it into the well along with the tool string. At this point, the first actuator port is at its maximum opening, and the second actuator port is at its minimum opening.

[0051] Step 2: After a well leak occurs, deploy the opening ball. The device will activate to seal the lower channel and open the circulation hole. At this time, the opening ball pushes the lower claw ball seat downwards through the upper claw ball seat until the upper claw ball seat falls into the upper expansion groove. The magnetic block descends to the vicinity of the first Hall sensor. The opening ball moves downwards through the expanded upper and lower claw ball seats and falls into the ball basket through the ball valve mechanism. One minute later, the automatic control system activates. The gear pump rotates to pump oil from the first oil tank into the second oil tank. The pressurized oil in the first actuator module port gradually injects into the second actuator module port, causing the inner sleeve and ball valve mechanism to rotate 90°, aligning the inner and outer circulation holes and opening the circulation hole. Simultaneously, the ball valve fork, along with the rotation of the ball valve mechanism, gradually pushes the ball to rotate 90°, sealing the lower channel. Then, the leak plugging operation can begin.

[0052] Step 3: After the leak sealing operation is completed, the shut-off ball is engaged, and the device resets. At this time, the shut-off ball pushes the lower claw-shaped ball seat downwards through the upper claw-shaped ball seat until the upper claw-shaped ball seat falls into the upper expansion groove. The shut-off ball then falls downwards onto the lower claw-shaped ball seat after the expansion, continuing to push the lower claw-shaped ball seat downwards into the lower expansion groove. At this time, the magnetic block descends to the vicinity of the second Hall sensor. Then, the shut-off ball moves downwards through the expanded lower claw-shaped ball seat and falls onto the ball in the sealed state. One minute later, the automatic control system activates. The gear pump reverses, pumping oil from the second oil tank into the first oil tank. The pressurized oil in the oil port of the second actuator module gradually injects into the oil port of the first actuator module, causing the inner sleeve and ball valve mechanism to rotate 90° in the opposite direction, separating the inner circulation hole and the outer circulation hole and closing the circulation hole. Simultaneously, the ball valve fork, along with the rotation of the ball valve mechanism, gradually pushes the ball to rotate 90° in the opposite direction, opening the lower channel.

[0053] Step 4: The last balls, including the opening and closing balls, fall into the ball basket and are collected there, gradually dissolving in the drilling fluid over time.

[0054] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic control multiple leak-sealing tool, comprising a housing (2), wherein an upper connector (1) and a lower connector (9) are respectively provided at the upper and lower ends of the housing (2), characterized in that, include: An open ball (50) and a close ball (51) are provided, wherein the open ball (50) and the close ball (51) are soluble balls, and the diameter of the close ball (51) is larger than that of the open ball (50). An activation device is provided inside the housing (2), and an automatic control system (5) is provided below the activation device. The closing ball (51) and the opening ball (50) are put into the housing (2) and push the activation device downward. The distance that the closing ball (51) pushes the activation device to move is greater than that of the opening ball (50). An inner sleeve (6) is provided below the automatic control system (5). An inner circulation hole (52) and an outer circulation hole (49) with corresponding positions are provided between the inner sleeve (6) and the housing (2). The automatic control system (5) rotates the inner sleeve (6) according to the moving distance of the activation device to control the opening and closing of the circulation hole. A ball valve mechanism (7) is provided below the inner sleeve (6). The ball valve mechanism (7) is connected to the inner sleeve (6) and moves with the rotation of the inner sleeve (6). A ball basket (8) is provided above the lower connector (9) inside the housing (2). The ball basket (8) collects and retains the opening ball (50) and the closing ball (51) until they dissolve. The surface of the ball basket (8) is provided with uniformly arranged flow channels.

2. The automatic control multiple leak-sealing tool according to claim 1, characterized in that, The activation device includes an upper claw-shaped ball seat (3) and a lower claw-shaped ball seat (4). The upper claw-shaped ball seat (3) is located above the lower claw-shaped ball seat (4), and the bottom end of the upper claw-shaped ball seat (3) is in contact with the top end of the lower claw-shaped ball seat (4). The upper claw-shaped ball seat (3) and the lower claw-shaped ball seat (4) are subjected to force and expand outward in the circumferential direction. The maximum inner diameter of the lower claw-shaped ball seat (4) is greater than the maximum inner diameter of the upper claw-shaped ball seat (3). The bottom end of the lower claw-shaped ball seat (4) is provided with a magnetic block (15) that cooperates with the automatic control system (5). The inner diameter of the upper claw-shaped ball seat (3) is smaller than the diameter of the opening ball (50), and the inner diameter of the lower claw-shaped ball seat (4) is larger than the diameter of the opening ball (50) and smaller than the diameter of the closing ball (51). The downward stroke of the lower claw-shaped ball seat (4) is greater than the downward stroke of the upper claw-shaped ball seat (3).

3. The automatic control multiple leak-sealing tool according to claim 2, characterized in that, An upper spring (11) is vertically arranged between the bottom end of the upper claw-shaped ball seat (3) and the inner wall of the housing (2), and a lower spring (12) is vertically arranged between the bottom end of the lower claw-shaped ball seat (4) and the automatic control system (5); the inner wall of the housing (2) is provided with an upper expansion groove and a lower expansion groove that are recessed in the circumferential direction below the upper claw-shaped ball seat (3) and the lower claw-shaped ball seat (4), respectively. The dimensions of the upper expansion groove and the lower expansion groove correspond to the upper claw-shaped ball seat (3) and the lower claw-shaped ball seat (4), respectively. The distance between the lower expansion groove and the lower claw-shaped ball seat (4) is greater than the distance between the upper expansion groove and the upper claw-shaped ball seat (3).

4. The automatic control multiple leak-sealing tool according to claim 3, characterized in that, The outer walls of the upper claw-type ball seat (3) and the lower claw-type ball seat (4) are provided with annular spring shoulders (18) that protrude circumferentially. The upper spring (11) and the lower spring (12) are installed between the corresponding spring shoulders (18) and the housing (2).

5. The automatic control multiple leak-sealing tool according to claim 3, characterized in that, The top outer walls of the upper claw-type ball seat (3) and the lower claw-type ball seat (4) are provided with circumferentially protruding ball seat shoulders (17); the bottom end of the upper expansion groove is provided with a shell shoulder (10), the inner diameter of the shell shoulder (10) is smaller than the outer diameter of the ball seat shoulder (17), and the maximum inner diameter of the upper claw-type ball seat (3) after falling into the upper expansion groove is greater than the diameter of the closing ball (51); the lower expansion groove is provided with a limiting sleeve (13), the bottom end of the limiting sleeve (13) is in contact with the automatic control system (5); the top end of the limiting sleeve (13) is provided with a limiting sleeve upper end face (14), the limiting sleeve upper end face (14) extends upward into the lower expansion groove to restrict the movement of the lower claw-type ball seat (4).

6. The automatic control multiple leak-sealing tool according to claim 5, characterized in that, Multiple limiting pins (16) are evenly provided between the limiting sleeve (13) and the housing (2), and the limiting sleeve (13) and the housing (2) are connected by the limiting pins (16).

7. The automatic control multiple leak-sealing tool according to claim 1, characterized in that, The automatic control system (5) is a tubular structure with a through-flow channel in the middle. The side wall of the automatic control system (5) is provided with a control cavity, a motor cavity, an oil pump cavity and an execution module (28) in sequence from top to bottom. The control cavity, motor cavity, oil pump cavity and execution module (28) are uniformly annular. The control cavity is provided with an automatic control device, the motor cavity is provided with an electric motor, the oil pump cavity is provided with a gear pump (25), and the execution module (28) has a first execution module oil port (38) and a second execution module oil port (39) that are separated from each other and whose size can be adjusted. The gear pump (25) is provided with a first oil tank (26) and a second oil tank (27) below it, which are connected to the first execution module oil port (38) and the second execution module oil port (39) respectively. The electric motor drives the gear pump (25) to rotate, and the pressure oil flows between the first execution module oil port (38) and the second execution module oil port (39) to drive the execution module (28) to rotate.

8. The automatic control multiple leak-sealing tool according to claim 7, characterized in that, The control cavity is equipped with a control chip (21), a power supply (22), and a first Hall sensor (19) and a second Hall sensor (20) arranged from top to bottom. The power supply (22), the first Hall sensor (19), and the second Hall sensor (20) are all connected to the control chip (21), and the control chip (21) is connected to the motor. After receiving a signal, the first Hall sensor (19) drives the motor to rotate and open the circulation hole through the control chip (21). After receiving a signal, the second Hall sensor (20) drives the motor to rotate and close the circulation hole through the control chip (21).

9. The automatic control multiple leak-sealing tool according to claim 8, characterized in that, The electric motor includes a motor stator (23) and a motor rotor (24). The motor stator (23) is fixed in position and connected to the control chip (21). The motor rotor (24) is fitted inside the motor stator (23) and its bottom end is connected to the gear pump (25).

10. The automatic control multiple leak-sealing tool according to claim 8, characterized in that, The gear pump (25) includes an annular internal gear (29) and a gear pump housing (34). The gear pump housing (34) is fitted around the outside of the internal gear (29). Multiple driving teeth are evenly arranged on the outer wall of the internal gear (29). The internal gear (29) is connected to the motor. Multiple fixed external gears (30) are evenly arranged on the circumferential side of the outer edge of the internal gear (29). Driven teeth that cooperate with the driving teeth are evenly arranged on the surface of the external gears (30). At the contact position between each external gear (30) and the internal gear (29), the inner wall of the gear pump housing (34) is provided with a first gear pump oil port (32) on the right side of each external gear (30) and a second gear pump oil port (33) on the left side of each external gear (30). The first gear pump oil port (32) and the second gear pump oil port (33) are respectively connected to the first oil tank (26) and the second oil tank (27).

11. The automatic control multiple leak-sealing tool according to claim 10, characterized in that, A gear pump bearing (31) is provided between the inner wall of the internal gear (29) and the inner wall of the oil pump cavity.

12. The automatic control multiple leak-sealing tool according to claim 8, characterized in that, The execution module (28) includes a fixed sleeve (35) and a rotating sleeve (36); the fixed sleeve (35) is composed of inner and outer pipe walls and is sealed at the bottom, forming an annular oil storage space between the two pipe walls. The inner pipe wall is provided with a protruding oil dividing plate, which is an incomplete annular shape; the rotating sleeve (36) is a single layer, and the inner wall is provided with a fan-shaped structure that cooperates with the oil storage space. It is inserted into the oil storage space from top to bottom and cooperates with the oil dividing plate to divide the oil storage space into a first execution module oil port (38) and a second execution module oil port (39) that are not connected to each other.

13. The automatic control multiple leak-sealing tool according to claim 12, characterized in that, The bottom of the outer edge of the rotating sleeve (36) is uniformly provided with a plurality of downwardly extending rotating sleeve handles (37).

14. The automatic control multiple leak-sealing tool according to claim 13, characterized in that, The outer wall of the inner sleeve (6) is provided with an inner circulation hole (52) corresponding to the position of the outer circulation hole (49); the top of the inner sleeve (6) is provided with an annular protruding step structure, the height and diameter of which correspond to the size of the rotating sleeve handle (37); the side wall of the step is provided with a through pin hole (40) corresponding to the position of the rotating sleeve handle (37), and a sleeve pin (53) is provided in the pin hole (40) to connect the inner sleeve (6) and the rotating sleeve handle (37).

15. The automatic control multiple leak-sealing tool according to claim 1, characterized in that, The ball valve mechanism (7) includes an upper ball valve connector (41) and a lower ball valve connector (42). The top end of the upper ball valve connector (41) is connected to the inner sleeve (6), and the top end of the lower ball valve connector (42) is inserted into the inner wall of the bottom end of the upper ball valve connector (41) and fixedly connected to the upper ball valve connector (41). The upper ball valve connector (41) and the lower ball valve connector (42) are provided with a through flow channel. The lower ball valve connector (42) is provided with a rotatable ball (43). The ball (43) is provided with a through hole in the middle that is concentric with the flow channel and has the same diameter.

16. The automatic control multiple leak-sealing tool according to claim 15, characterized in that, The surface of the ball (43) is symmetrically provided with mounting planes on the left and right sides with the through hole as the center. A ball rotating pin (45) is provided at the center of the mounting plane. One end of the ball rotating pin (45) is inserted into the mounting plane and the other end is inserted into the inner wall of the lower connector (42) of the ball valve. The ball (43) rotates around the ball rotating pin (45).

17. The automatic control multiple leak-sealing tool according to claim 16, characterized in that, The mounting plane has a cross-shaped rotating groove centered on the ball rotating pin (45). The inner wall of the housing (2) is provided with a ball valve fork (46) at a position corresponding to the rotating groove. One end of the ball valve fork (46) is fixed to the inner wall of the housing (2), and the other end extends into the rotating groove through the upper ball valve connector (41) and the lower ball valve connector (42). The upper ball valve connector (41) and the lower ball valve connector (42) are provided with fork grooves arranged circumferentially and corresponding to the position of the ball valve fork (46).

18. The automatic control multiple leak-sealing tool according to claim 17, characterized in that, The upper and lower ends of the ball (43) are respectively provided with an upper seal (47) and a lower seal (48) for the upper connector (41) and the lower connector (42) of the ball valve.

Images