Intelligent blowout and leakage prevention nipple, drilling tool and related method

Abstract

The invention discloses an intelligent blowout and leakage prevention short section, a drilling tool and a related method. The intelligent blowout-preventing and leakage-preventing short section comprises a short section body, a rubber ring, a push disc, a bypass valve, a push disc pushing mechanism, a motor, a controller, an in-pipe flow detector and an out-pipe flow detector. The in-tube flow detector, the out-tube flow detector, the motor and the controller are electrically connected; the controller can control the rotation of the motor, push the push disc to move downwards and extrude the rubber ring to block a borehole annulus according to a signal transmitted by the in-pipe flow detector and / or the out-pipe flow detector if the current working condition is judged to be a well leakage or blowout working condition, so that a valve hole of the bypass valve is opened; if it is judged that the current working condition is recovered to the normal working condition, the motor is controlled to rotate, the push disc is pushed to move upwards, the rubber ring is recovered to the normal state from the extrusion state, the well annular space is opened, and the bypass valve hole is closed. Well leakage and blowout are controlled within the minimum harm range, blowout and well leakage are controlled in the bud state, and therefore well drilling safety is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of geothermal, oil and gas drilling technology, and in particular to an intelligent blowout and leak prevention pup joint, a drilling tool and related methods. Background Art

[0002] With the continuous deepening of geothermal and oilfield exploration and development, the number of high-pressure wells and leaky wells has increased year by year, and well control hazards such as blowouts and leaks often occur. Blowouts, leaks leading to leaks turning into blowouts, and wellbore collapse caused by leaks will all cause waste of resources or adverse social impacts. In response to blowouts, the blowout preventer is currently more commonly used. It is a ground blowout prevention device. When a blowout occurs, the blowout is handled by closing the blowout preventer on the ground, but it cannot avoid that the wellbore annulus and wellbore fluid will be contaminated by the formation fluid; in response to leaks, the current treatment method is post-processing, such as injecting plugging agents, etc. The wellbore fluid level cannot be guaranteed, which may be accompanied by wellbore collapse and leaks turning into blowouts.

[0003] Therefore, in order to reduce the risk of blowouts and well leakage, control blowouts and well leakage within the range of minimum harm, and ensure drilling safety, it is necessary to develop an intelligent blowout and leakage prevention short joint for drilling wells. According to the flow of wellbore fluid in the annulus, it can automatically and timely identify the leakage and blowout situation and close the annulus, so as to control blowouts and well leakage in the bud. Summary of the invention

[0004] In view of the above problems, the present invention is proposed to provide an intelligent blowout and leakage prevention nipple, drilling tool and related methods that overcome the above problems or at least partially solve the above problems.

[0005] In a first aspect, an embodiment of the present invention provides an intelligent blowout and leak prevention nipple, comprising:

[0006] A short section body, and a rubber ring, a push plate, a bypass valve, a push plate pushing mechanism, a motor, a controller, an in-pipe flow detector, and an out-pipe flow detector arranged on the short section body;

[0007] The in-pipe flow detector, the out-pipe flow detector, the motor and the controller are electrically connected;

[0008] The bypass valve is used to open and close the bypass valve hole provided on the short section body;

[0009] The rubber ring is sleeved on the push plate;

[0010] The push plate is sleeved on the short section body; the output shaft of the motor is connected to the push plate pushing mechanism;

[0011] The controller is used to control the rotation of the motor if it is judged that the current working condition is a leak or blowout condition based on the signals transmitted by the flow detector inside the pipe and / or the flow detector outside the pipe, and to push the push plate downward through the push plate pushing mechanism, and to squeeze the rubber ring to seal the wellbore annulus, so that the valve hole of the bypass valve is opened; if it is judged that the current working condition is restored to normal, the controller is used to control the rotation of the motor, and to push the push plate upward through the push plate pushing mechanism, so that the rubber ring is restored from the squeezed state to the normal state, the wellbore annulus is opened, and the valve hole of the bypass valve is closed.

[0012] In one embodiment, the push plate pushing mechanism comprises: a transmission gear, a transmission screw and a thrust bearing; the transmission gear and the thrust bearing are sleeved on the short section body, one end of the transmission screw is embedded in the thrust bearing, and the other end is threadedly connected to the threaded hole of the push plate;

[0013] The output shaft end of the motor has a first gear, and the end gear is meshed with the transmission gear to drive the transmission gear to rotate;

[0014] The transmission screw is also provided with a second gear, which is meshed with the transmission gear to transmit the power of the motor, drive the transmission screw to rotate, and generate thrust on the push plate in the axial direction.

[0015] In one embodiment, the short section body is in the shape of a hollow cylinder, and a push plate embedding groove is provided at one end;

[0016] The push plate is cylindrical and includes an embedded key ring and a rubber ring pushing shoulder, the shoulder is provided with the threaded hole along the axial direction, the transmission screw is embedded in the threaded hole and is threadedly connected to the threaded hole;

[0017] The embedding key ring of the push plate is embedded in the push plate embedding groove.

[0018] In one embodiment, a bypass valve hole is also provided on the short section body;

[0019] The bypass valve comprises a valve fitted with the interior of the short section body and a connecting bracket connected to the valve and arranged outside the short section body, wherein the valve is arranged at a corresponding position of the valve hole of the bypass valve and is used to close or open the valve hole of the bypass valve;

[0020] The connecting bracket is connected to the outer wall of the push plate through a pin.

[0021] In one embodiment, the thrust bearing is in the shape of a ring, and is provided with a ball groove and an axial fixing groove for the transmission screw at the bottom;

[0022] The thrust bearing cooperates with the transmission gear in the axial direction through the ball groove to limit the axial movement of the transmission gear; the end of the transmission screw is embedded in the axial fixing groove of the transmission screw to limit the axial movement of the transmission screw.

[0023] In one embodiment, the short section body is further provided with a first thrust bearing fixing pin groove;

[0024] The side wall of the thrust bearing is radially provided with a second thrust bearing fixing pin groove;

[0025] The thrust bearing is connected to the short section body by a pin inserted into the second thrust bearing fixing pin groove and the first thrust bearing fixing pin groove.

[0026] In one embodiment, the short section body is further provided with at least one in-pipe flow detector pin slot and at least one out-pipe flow detector pin slot;

[0027] The in-pipe flow detector and the out-pipe flow detector are respectively sleeved on the outer wall of the short section body;

[0028] The in-pipe flow detector is inserted into the in-pipe flow detector pin groove through a pin and is fixedly connected to the short section body;

[0029] The external flow detector is inserted into the pin groove of the external flow detector through a pin and fixedly connected to the short section body.

[0030] In one embodiment, the above-mentioned intelligent blowout and leak prevention nipple further includes: a battery and a mounting box, wherein the battery is electrically connected to the motor and is used to power the motor;

[0031] The battery and the controller are arranged in the installation box, and the installation box is fixedly connected to the short section body by a pin.

[0032] In a second aspect, an embodiment of the present invention provides a drilling tool, on which the aforementioned intelligent blowout and leakage prevention short joint is provided.

[0033] In a third aspect, an embodiment of the present invention provides a control method for the aforementioned intelligent blowout and leakage prevention nipple, comprising:

[0034] Obtaining information on flow rates detected by the in-pipe flow detector and the out-pipe flow detector;

[0035] According to the detected flow information, if it is determined that the current condition is a leak or blowout condition, the motor output shaft is controlled to rotate in a first direction to drive the push plate downward, squeeze the rubber ring to seal the annulus, and open the bypass valve on the short section body;

[0036] If it is determined that the current working condition is restored to normal, the output shaft of the motor is controlled to rotate in the second direction to drive the push plate upward, the rubber ring is restored to open the annulus, and the bypass valve on the short section body is closed;

[0037] The first direction and the second direction are two opposite rotation directions.

[0038] In a fourth aspect, an embodiment of the present invention provides a drilling method, wherein the method uses the drilling tool as described above to perform drilling.

[0039] The beneficial effects of the above technical solution provided by the embodiment of the present invention include at least:

[0040] The above-mentioned intelligent blowout and leakage prevention short joint provided in the embodiment of the present invention has an in-pipe flow detector and an out-pipe flow detector arranged on the short joint body. The controller can judge whether a leakage or a blowout condition occurs according to the flow signals detected by the in-pipe flow detector and the out-pipe flow detector. If it occurs, the push plate is driven downward by controlling the rotation of the motor, and the sealing ring is squeezed to block the annulus. At the same time, the bypass valve is opened, so that leakage and blowout are controlled within the range with the least harm, and the blowout and leakage are controlled in the embryonic state, thereby ensuring the safety of drilling.

[0041] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0042] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0044] Figure 1 It is a schematic diagram of the overall structure of the intelligent blowout and leakage prevention short section in an embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram of the structure of the short section body in an embodiment of the present invention;

[0046] Figure 3 is a schematic cross-sectional view of a short section body in an embodiment of the present invention;

[0047] Figure 4 It is a schematic diagram of the structure of a thrust bearing in an embodiment of the present invention;

[0048] Figure 5It is a schematic diagram of the structure of the installation box, battery and controller in an embodiment of the present invention;

[0049] Figure 6 This is a schematic diagram of the structure of a rubber ring in an embodiment of the present invention;

[0050] Fig. 7A and 7B It is a structural schematic diagram of a push plate in an embodiment of the present invention;

[0051] Figure 8 Schematic diagram of the structure of the transmission screw in the embodiment of the present invention;

[0052] Fig. 9 It is a structural schematic diagram of a transmission gear in an embodiment of the present invention;

[0053] Fig.10 Schematic diagram of the structure of the bypass valve in the embodiment of the present invention;

[0054] Fig.11 is a schematic diagram of the overall structure of a motor in an embodiment of the present invention;

[0055] Fig.12 It is a schematic diagram of the structure of the external flow detector of the pipe in an embodiment of the present invention;

[0056] Fig.13 Schematic diagram of the structure of the in-pipe flow detector in an embodiment of the present invention;

[0057] Fig.14 The figure is a flow chart of a control method of an intelligent blowout and leakage prevention nipple in an embodiment of the present invention. DETAILED DESCRIPTION

[0058] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0059] The embodiment of the present invention provides an intelligent blowout and leak prevention short joint, referring to Figure 1 As shown, including:

[0060] A short section body 1, and a rubber ring 2, a push plate 3, a bypass valve 7, a push plate pushing mechanism 3, a motor 8, a controller (located in a mounting box 9), an in-pipe flow detector 13, and an out-pipe flow detector 12 arranged on the short section body 1;

[0061] The in-pipe flow detector 13, the out-pipe flow detector 12, the motor 8 and the controller are electrically connected;

[0062] The bypass valve 7 is used to open and close the bypass valve hole provided on the short section body;

[0063] The rubber ring 7 is sleeved on the push plate 3;

[0064] The push plate 3 is sleeved on the short section body 1; the output shaft of the motor 81 is connected to the push mechanism of the push plate 3;

[0065] The controller is used to control the rotation of the motor if it is judged that the current working condition is a leak or blowout condition based on the signals transmitted by the in-pipe flow detector 13 and / or the out-pipe flow detector 12, and push the push plate downward through the push plate 3 pushing mechanism, and squeeze the rubber ring 7 to block the wellbore annulus, so that the bypass valve hole is opened; if it is judged that the current working condition is restored to normal, control the rotation of the motor, push the push plate upward through the push plate 3 pushing mechanism, and the rubber ring 7 is restored from the squeezed state to the normal state, so that the wellbore annulus is opened and the bypass valve hole is closed.

[0066] The above-mentioned intelligent blowout and leakage prevention short joint provided in the embodiment of the present invention has an in-pipe flow detector and an out-pipe flow detector arranged on the short joint body. The controller can judge whether a leakage or blowout condition occurs according to the flow signals detected by the in-pipe flow detector and the out-pipe flow detector. If it occurs, the push plate is driven downward by controlling the rotation of the motor, and the sealing ring is squeezed to seal the annulus. At the same time, the bypass valve is opened, so that leakage and blowout are controlled within the range with the least harm, and the blowout and leakage are controlled in the embryonic state, thereby ensuring the safety of drilling.

[0067] Further, refer to Figure 1 As shown, the push plate pushing mechanism comprises: a transmission gear 5, a transmission screw 4 and a thrust bearing 6; the transmission gear 5 and the thrust bearing 6 are sleeved on the short section body 1, one end of the transmission screw 4 is embedded in the thrust bearing 6, and the other end is threadedly connected to the threaded hole of the push plate 3;

[0068] The output shaft end of the motor 8 has a first gear, which is meshed with the transmission gear to drive the transmission gear to rotate;

[0069] The transmission screw 4 is also provided with a second gear, which meshes with the transmission gear 5 to transmit the power of the motor, drive the transmission screw 4 to rotate, and generate thrust on the push plate 3 in the axial direction.

[0070] Further, refer to Figure 1 , Figure 2 and Figure 3 As shown, the short section body 1 is also provided with bypass valve holes 1-4.

[0071] Reference Fig.10As shown, the bypass valve specifically includes: a valve 7-1 fitted with the inside of the short section body and a connecting bracket 7-2 connected to the valve and arranged outside the short section body, wherein the valve is arranged at a corresponding position of the valve hole of the bypass valve and is used to close or open the valve hole of the bypass valve;

[0072] The connecting bracket is connected to the outer wall of the push plate through a pin.

[0073] Further, refer to Figure 1 and Figure 4 As shown, the thrust bearing 6 is annular, with a ball groove and an axial fixing groove for the transmission screw at the bottom;

[0074] The thrust bearing 6 cooperates with the transmission gear in the axial direction through the ball groove to limit the axial movement of the transmission gear 5; the end of the transmission screw 4 is embedded in the axial fixing groove of the transmission screw 4 to limit the axial movement of the transmission screw 4.

[0075] Further, refer to Figure 1 and Figure 4 As shown, the short section body 1 is also provided with a first thrust bearing fixing pin groove 1-6;

[0076] The side wall of the thrust bearing 6 is radially provided with a second thrust bearing fixing pin groove 6-3;

[0077] The thrust bearing 6 is connected to the short section body 1 by means of a pin inserted into the second thrust bearing fixing pin groove 6-3 and the first thrust bearing fixing pin groove 1-6.

[0078] Furthermore, the short section body 1 is also provided with at least one in-pipe flow detector pin groove 1-10 and at least one out-pipe flow detector pin groove 1-9;

[0079] The in-pipe flow detector 13 and the out-pipe flow detector 12 are respectively sleeved on the outer wall of the short section body 1;

[0080] The in-pipe flow detector 13 is inserted into the in-pipe flow detector pin groove 1-10 through a pin and is fixedly connected to the short section body 1;

[0081] The external flow detector 12 is inserted into the external flow detector pin groove 1-9 by a pin and is fixedly connected to the short section body 1.

[0082] Further, the intelligent anti-blowout and anti-leakage short joint provided in the embodiment of the present invention refers to Figure 1 and Figure 5 As shown, it also includes: a battery 10 and a mounting box 9, wherein the battery 10 is electrically connected to the motor 8 to supply power to the motor 8;

[0083] The battery 8 and the controller are arranged in the installation box 9, and the installation box 9 is fixedly connected to the short section body 1 by pins.

[0084] Reference Figure 5 As shown, the battery 10 and the controller 11 are arranged in the installation box 9. A pin fixing hole is arranged at the connection between the installation box 9 and the short section body to fix the installation box 9.

[0085] Specifically, for example, refer to Figure 2 and Figure 3 The short section body 1 shown is cylindrical as a whole, and is provided with a lower drilling tool connecting thread 1-1, a push plate embedding groove 1-2, an axial fixing groove 1-3 of a driving screw, a bypass valve hole 1-4, a bearing ball groove 1-5, a thrust bearing fixing pin groove 1-6, a motor fixing pin groove 1-7, a battery fixing pin groove 1-8, a pin groove 1-9 of an external flow detector, a pin groove 1-10 of an internal flow detector and a top drilling tool connecting thread 1-11 from bottom to top.

[0086] Reference Figure 6 As shown, the rubber ring 2 is in the shape of a ring and can be deformed to close the annular space under the extrusion of the push plate.

[0087] Reference Fig. 7A and Figure 7B As shown, the push plate 3 is in the shape of a circular ring as a whole, and is provided with an embedded key ring 3-1 (playing a straightening role) that can cooperate with the push plate embedding groove, a rubber ring push shoulder 3-2, a bypass valve fixing pin hole 3-3 and a longitudinally penetrating transmission screw hole 3-4 (a thread is provided therein to cooperate with the transmission screw, and the transmission screw can generate upward and downward thrust when it rotates therein).

[0088] Reference Figure 8 As shown, the transmission screw 4 is cylindrical as a whole, and is provided with a bottom axial fixing key 4-1 (cooperating with the transmission screw axial fixing groove 1-3 so that the screw can only rotate in the circumferential direction), a transmission thread 4-2 (used to cooperate with the transmission screw hole 3-4), a gear 4-3 (used to cooperate with the transmission gear 5 and rotate under the action of the transmission gear) and a top axial fixing key 4-4 (used to cooperate with the axial fixing groove 6-1 on the thrust bearing 6 so that the screw can only rotate in the circumferential direction).

[0089] Reference Fig. 9 As shown, the transmission gear 5 is provided with ball grooves 5-2 at the bottom and top and teeth 5-1 at the outer side, which can transmit power to the motor and the transmission screw.

[0090] Reference Figure 4As shown, the thrust bearing 6 is in an annular shape as a whole, with a ball groove 6-1 (used to cooperate with the transmission gear 5 to limit its axial movement) and a transmission screw axial fixing groove 6-2 (used to cooperate with the transmission screw to limit the axial movement of the transmission screw) at the bottom, and a fixing pin groove 6-3 is provided in the middle.

[0091] Reference Fig.10 As shown, the bypass valve 7 has an inner portion 7-2 which is in a circular ring shape and fits inside the short section body, and can close and open the valve hole of the bypass valve; the outer portion is a connecting bracket 7-1, and a pin hole connected to the push plate 3 is provided on the top thereof.

[0092] Reference Fig.11 As shown, the motor 8 includes a motor body 8-2 and an output shaft. A gear 8-1 is provided at the top of the output shaft to provide power for the transmission gear, and a pin fixing hole is provided on the inner side for fixing with the short section body.

[0093] Reference Figure 5 As shown, the installation box 9, for example, can be a hollow square box with a cover, and a pin fixing hole is provided at the connection with the short section body; three pin fixing holes are evenly distributed in the circumferential direction.

[0094] The battery 10 provides power for the motor. The controller 11 may be, for example, a 51 single chip microcomputer, which controls the rotation of the motor 8 by analyzing the signals transmitted by the external flow detector 12 and the internal flow detector 13 .

[0095] Reference Fig.12 As shown, the external flow detector 12 is a cylindrical structure, for example, a square box structure without a top and bottom cover (magnetic sheets are fixed on the front and rear sides to generate a magnetic field, and voltage monitoring boards are fixed on the left and right sides), and pin fixing holes are respectively provided at the four corners of the connection with the short section body; three of them are evenly distributed along the circumference of the short section body.

[0096] Reference Fig.13 As shown, the in-pipe flow detector 13 includes two magnetic plates (magnetic plate 13-1 and magnetic plate 13-2, symmetrically fixed to the outside of the short section body by pins), and two voltage monitoring boards (symmetrically fixed to the inside of the short section body by pins), and the connection line of the two magnetic plates is perpendicular to the connection line of the two voltage monitoring boards.

[0097] The assembly process of the above-mentioned intelligent anti-blowout and anti-leakage short section may be, for example:

[0098] 1. Put the rubber ring and push plate on the short section body from bottom to top;

[0099] 2. Connect the bypass valve stem to the push plate pin through the bypass valve hole;

[0100] 3. Install the transmission screw into the transmission screw hole of the push plate by rotating;

[0101] 4. Put the gear and thrust bearing on the short section body from bottom to top;

[0102] 5. Fix the motor evenly around the circumference on the short section body with threaded pins;

[0103] 6. Fix the battery controller installation box evenly around the circumference on the short section body with threaded pins;

[0104] 7. Fix the flow detection tube outside the pipe evenly around the circumference on the short section body through threaded pins;

[0105] 8. Fix the two magnetic pieces symmetrically to the outside of the short section body through pins;

[0106] 9. Fix the two voltage monitoring boards symmetrically on the inner side of the short section body through pins;

[0107] 10. Lead the voltage signal lines on the flow detector outside the pipe and the flow detector inside the pipe to the ADC0832 chip, and electrically connect the silver corners of the chip to the corresponding corners of the 51 single-chip microcomputer;

[0108] 11. Connect the power cord from the battery controller to the motor;

[0109] 12. Write a control program on the single-chip computer, and judge the current condition as leakage or blowout according to the flow signals detected by the flow detector outside the pipe and the flow detector inside the pipe, control the clockwise rotation of the motor, push the push plate downward through the push plate pushing mechanism, and squeeze the rubber ring to seal the wellbore annulus, so that the bypass valve hole is opened; if it is judged that the current condition is restored to normal, control the counterclockwise rotation of the motor, push the push plate upward through the push plate pushing mechanism, and the rubber ring is restored from the squeezed state to the normal state, opening the wellbore annulus and closing the bypass valve hole.

[0110] Based on the same inventive concept, the embodiment of the present invention also provides a control method for an intelligent blowout and leak prevention short joint, referring to Fig.14 As shown, the following steps are included:

[0111] Obtaining information on flow rates detected by the in-pipe flow detector and the out-pipe flow detector;

[0112] According to the detected flow information, if it is determined that the current condition is a leak or blowout condition, the motor output shaft is controlled to rotate in a first direction to drive the push plate downward, squeeze the rubber ring to seal the annulus, and open the bypass valve on the short section body;

[0113] If it is determined that the current working condition is restored to normal, the output shaft of the motor is controlled to rotate in the second direction to drive the push plate upward, the rubber ring is restored to open the annulus, and the bypass valve on the short section body is closed;

[0114] The first direction and the second direction are two opposite rotation directions.

[0115] For example, the first direction may be a clockwise direction, and correspondingly, the second direction may be a counterclockwise direction.

[0116] An embodiment of the present invention further provides a drilling tool, which is provided with the aforementioned intelligent blowout and leakage prevention short joint.

[0117] The embodiment of the present invention further provides a drilling method, which uses the aforementioned drilling tool provided by the embodiment of the present invention to perform drilling.

[0118] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An intelligent blowout and leak prevention nipple, characterized in that: include: A short section body, and a rubber ring, a push plate, a bypass valve, a push plate pushing mechanism, a motor, a controller, an in-pipe flow detector, and an out-pipe flow detector arranged on the short section body; The in-pipe flow detector, the out-pipe flow detector, the motor and the controller are electrically connected; The bypass valve is used to open and close the bypass valve hole provided on the short section body; The rubber ring is sleeved on the push plate; The push plate is sleeved on the short section body; the output shaft of the motor is connected to the push plate pushing mechanism; The controller is used to control the rotation of the motor if it is judged that the current working condition is a leak or blowout condition based on the signals transmitted by the flow detector inside the pipe and / or the flow detector outside the pipe, and to push the push plate downward through the push plate pushing mechanism, and to squeeze the rubber ring to seal the wellbore annulus, so that the valve hole of the bypass valve is opened; if it is judged that the current working condition is restored to normal, the controller is used to control the rotation of the motor, and to push the push plate upward through the push plate pushing mechanism, so that the rubber ring is restored from the squeezed state to the normal state, the wellbore annulus is opened, and the valve hole of the bypass valve is closed.

2. The intelligent blowout and leak prevention nipple according to claim 1, characterized in that: The push plate pushing mechanism comprises: a transmission gear, a transmission screw and a thrust bearing; the transmission gear and the thrust bearing are sleeved on the short section body, one end of the transmission screw is embedded in the thrust bearing, and the other end is threadedly connected to the threaded hole of the push plate; The output shaft end of the motor has a first gear, and the end gear is meshed with the transmission gear to drive the transmission gear to rotate; The transmission screw is also provided with a second gear, which is meshed with the transmission gear to transmit the power of the motor, drive the transmission screw to rotate, and generate thrust on the push plate in the axial direction.

3. The intelligent blowout and leak prevention nipple as claimed in claim 2, characterized in that: The short section body is in the shape of a hollow cylinder, and one end of the short section is provided with a push plate embedding groove; The push plate is cylindrical and includes an embedded key ring and a rubber ring pushing shoulder, the shoulder is provided with the threaded hole along the axial direction, the transmission screw is embedded in the threaded hole and is threadedly connected to the threaded hole; The embedding key ring of the push plate is embedded in the push plate embedding groove.

4. The intelligent blowout and leak prevention nipple according to claim 1, characterized in that: The short section body is also provided with a bypass valve hole; The bypass valve comprises a valve fitted with the interior of the short section body and a connecting bracket connected to the valve and arranged outside the short section body, wherein the valve is arranged at a corresponding position of the valve hole of the bypass valve and is used to close or open the valve hole of the bypass valve; The connecting bracket is connected to the outer wall of the push plate through a pin.

5. The intelligent blowout and leak prevention nipple as claimed in claim 2, characterized in that: The thrust bearing is in the shape of a circular ring, and is provided with a ball groove and an axial fixing groove for the transmission screw at the bottom; The thrust bearing cooperates with the transmission gear in the axial direction through the ball groove to limit the axial movement of the transmission gear; the end of the transmission screw is embedded in the axial fixing groove of the transmission screw to limit the axial movement of the transmission screw.

6. The intelligent blowout and leak prevention nipple as claimed in claim 2, characterized in that: The short section body is also provided with a first thrust bearing fixing pin groove; The side wall of the thrust bearing is radially provided with a second thrust bearing fixing pin groove; The thrust bearing is connected to the short section body by a pin inserted into the second thrust bearing fixing pin groove and the first thrust bearing fixing pin groove.

7. The intelligent blowout and leak prevention nipple according to claim 1, characterized in that: The short section body is also provided with at least one pin slot for an in-pipe flow detector and at least one pin slot for an out-pipe flow detector; The in-pipe flow detector and the out-pipe flow detector are respectively sleeved on the outer wall of the short section body; The in-pipe flow detector is inserted into the in-pipe flow detector pin groove through a pin and is fixedly connected to the short section body; The external flow detector is inserted into the pin groove of the external flow detector through a pin and fixedly connected to the short section body.

8. The intelligent blowout and leak prevention nipple according to any one of claims 1 to 7, characterized in that: Also includes: A battery and a mounting box, wherein the battery is electrically connected to the motor and is used to power the motor; The battery and the controller are arranged in the installation box, and the installation box is fixedly connected to the short section body by a pin.

9. A drilling tool, characterized in that: The drilling tool is provided with an intelligent blowout and leakage prevention nipple as described in any one of claims 1 to 8.

10. A control method for an intelligent blowout and leak prevention nipple according to any one of claims 1 to 8, characterized in that: include: Obtaining information on flow rates detected by the in-pipe flow detector and the out-pipe flow detector; According to the detected flow information, if it is determined that the current condition is a leak or blowout condition, the motor output shaft is controlled to rotate in a first direction to drive the push plate downward, squeeze the rubber ring to seal the annulus, and open the bypass valve on the short section body; If it is determined that the current working condition is restored to normal, the output shaft of the motor is controlled to rotate in the second direction to drive the push plate upward, the rubber ring is restored to open the annulus, and the bypass valve on the short section body is closed; The first direction and the second direction are two opposite rotation directions.

11. A method for drilling a well, characterized in that: The method comprises drilling a well using the drilling tool according to claim 9.

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