Sleeve driver and working method of sleeve driver

Abstract

The invention discloses a casing driver and a working method thereof, and relates to the technical field of rotary drilling rig construction.The casing driver comprises a driving ring and an inner ring which are coaxially arranged, the top end of the driving ring is used for being fixedly connected with a power head of a rotary drilling rig, the bottom end of the inner ring is used for being arranged on the outer side of a casing in a sleeving mode, and the bottom end of the inner ring extends out of the bottom end of the driving ring; a first pin shaft is arranged on the side wall of the part, extending out of the driving ring, of the inner ring, and when the power head of the rotary drilling rig drives the driving ring to rotate by a preset angle around the axis of the driving ring in the first direction, the first pin shaft can move inwards and be inserted into a pin shaft hole formed in the circumferential side wall of the sleeve. When the power head of the rotary drilling rig drives the driving ring to rotate around the axis of the driving ring by a preset angle in the second direction, the first pin shaft can move outwards and be pulled out of the pin shaft hole formed in the circumferential side wall of the sleeve, the safety of dismounting and mounting the pin shaft is improved, the problem of pipeline winding does not need to be considered, and the working efficiency is improved. And the convenience in the pin shaft dismounting and mounting process is improved.

Description

Technical Field

[0001] This invention relates to the field of rotary drilling construction technology, and in particular to a casing driver and a method for operating the casing driver. Background Technology

[0002] In rotary drilling, the full casing method is widely used. This method utilizes the power of a rotary drilling rig to drive the casing for drilling and wall protection. The rotary drilling rig transmits drilling pressure and torque to the lower casing through a casing driver. The casing driver and the casing are connected and fixed by pins set on the casing driver. There are usually 4-6 pins. After one casing is drilled, the pins need to be removed to disengage the casing driver from the casing at the borehole opening and connect it to the next casing to be extended through pins. Then, the rotary drilling rig lifts the casing to be extended and connects it to the casing at the borehole opening before proceeding to the next drilling operation. Generally, the sleeve length is 3-6m, and even the shortest sleeve is around 2m. It is usually installed manually and requires the use of tools such as ladders to disassemble or install the pin. Working at heights poses a significant safety hazard. A few manufacturers install hydraulic cylinders or pneumatic cylinders near the pin to install and disassemble the pin by adding an extra power source. Although this method does not require manual labor, the extra power line needs to be considered for the problem of the pipeline getting tangled during the rotation of the sleeve drive, which causes inconvenience to the actual disassembly and installation of the pin. Summary of the Invention

[0003] The purpose of this invention is to provide a sleeve driver and a sleeve driver operating method to solve the problems existing in the prior art and improve the safety and convenience of disassembling and installing the pin.

[0004] To achieve the above objectives, the present invention provides the following solution: This invention provides a casing actuator, comprising a drive ring and an inner ring coaxially arranged. The top end of the drive ring is fixedly connected to a rotary drilling rig power head, and the bottom end of the inner ring is fitted onto the outside of the casing. The drive ring is fitted onto the outside of the inner ring and can rotate relative to the inner ring by a preset angle. The bottom end of the inner ring extends from the bottom end of the drive ring. A first pin is provided on the side wall of the portion of the inner ring extending from the drive ring. When the rotary drilling rig power head drives the drive ring to rotate around the axis of the drive ring in a first direction by a preset angle, the first pin can move inward and be inserted into a pin hole opened in the circumferential side wall of the casing. When the rotary drilling rig power head drives the drive ring to rotate around the axis of the drive ring in a second direction by a preset angle, the first pin can move outward and be pulled out from the pin hole opened in the circumferential side wall of the casing.

[0005] In some embodiments, a bushing is fitted outside the first pin, the end of the bushing is fixedly connected to the side wall of the inner ring, and an elastic element is provided between the bushing and the pin. When the first pin moves outward, the elastic element is compressed, and when the elastic element recovers, it can cause the first pin to move inward.

[0006] In some embodiments, the system further includes an outer ring, a cam, and a connecting rod. The outer ring is coaxially arranged with the drive ring and is sleeved on the outside of the drive ring. The drive ring is capable of rotating relative to the outer ring by a preset angle. The end of the first pin away from the axis of the inner ring is hinged to the center of the cam. Under the action of the elastic element, the elliptical fan-shaped outer contour of the cam remains in contact with the end of the bushing away from the axis of the inner ring. The connecting rod is vertically arranged, with its top end hinged to the outer wall of the outer ring and its bottom end hinged to the side of the cam away from the elliptical fan-shaped outer contour. When the drive ring rotates by a preset angle in a second direction, it can drive the outer ring from a first height... The cam moves upward to the second height, the connecting rod drives the cam to rotate counterclockwise around the center, the distance from the end of the bushing away from the inner ring axis to the center of the cam reaches its maximum value, the first pin compresses the elastic element and moves outward and is pulled out from the pin hole opened on the circumferential side wall of the sleeve, when the drive ring rotates in the first direction by a preset angle, it can drive the outer ring to move downward from the second height to the first height, the connecting rod drives the cam to rotate clockwise around the center, the distance from the end of the bushing away from the inner ring axis to the center of the cam reaches its minimum value, the first pin moves inward under the restoring force of the elastic element and inserts into the pin hole opened on the circumferential side wall of the sleeve.

[0007] In some embodiments, at least two circular first pin holes are formed on the circumferential sidewall of the drive ring, and corresponding second pin holes are formed on the circumferential sidewall of the inner ring. The second pin holes include a first elongated hole and a second elongated hole. The first elongated hole extends horizontally, and the bottom end of the second elongated hole communicates with the end of the first elongated hole near the second direction. The top end and bottom end of the second elongated hole are spaced apart in the height direction, and the top end of the second elongated hole is inclined relative to the bottom end of the second elongated hole towards the second direction. A third pin hole is formed on the circumferential sidewall of the outer ring, and the third pin hole includes a first elongated hole extending horizontally. A third elongated hole is provided, and the projections of the third pin hole and the second pin hole on the horizontal plane coincide. A second pin shaft is inserted into the first pin hole, the second pin hole, and the third pin hole. When the drive ring rotates in the second direction by a preset angle, it drives the second pin shaft to move from the end of the first elongated hole away from the second elongated hole to the top of the second elongated hole, thereby driving the outer ring to move upward from the first height to the second height. When the drive ring rotates in the first direction by a preset angle, it drives the second pin shaft to move from the top of the second elongated hole to the end of the first elongated hole away from the second elongated hole, thereby driving the outer ring to move downward from the second height to the first height.

[0008] In some embodiments, a baffle is also fixedly provided on the outer ring at the location of the third pin hole to separate the first pin hole, the second pin hole and the third pin hole from the outside.

[0009] In some embodiments, the second pin has a protrusion at the end away from the axis of the drive ring, the protrusion abutting against the outer side wall of the outer ring to limit the radial displacement of the second pin.

[0010] In some embodiments, the drive ring includes a drive tube and a power connector. The power connector is sleeved on the outside of the inner ring and is used to drive the inner ring to rotate during drilling. The first pin hole is formed on the side wall of the power connector. The drive tube is fixedly installed at the top of the power connector, and the top of the drive tube is used to be fixedly connected to the power head of the rotary drilling rig.

[0011] In some embodiments, the inner ring includes a lifting connector, a power seat, and a sleeve female connector. The lifting connector is disposed inside the power connector. The second pin hole is formed on the side wall of the lifting connector. The power seat is fixedly connected to the bottom end of the lifting connector. The sleeve female connector is fixedly connected to the bottom end of the power seat. The sleeve female connector is used to be sleeved on the outside of the sleeve. The first pin is disposed on the side wall of the sleeve female connector.

[0012] In some embodiments, a stiffening plate is fixedly provided on the outer side wall of the outer ring, the stiffening plate being arranged radially along the outer ring, and the top end of the connecting rod being hinged to the stiffening plate.

[0013] This invention also provides a casing actuator operating method, employing any of the casing actuators described above, comprising the following steps: placing the casing to be extended on the ground; fitting an inner ring around the outside of the casing to be extended, and using a rotary drilling rig power head to drive the drive ring to rotate relative to the inner ring in a first direction by a preset angle, so that the first pin is inserted into a pin hole opened on the circumferential sidewall of the casing to be extended, thereby fixing the inner ring to the casing to be extended; connecting the casing to be extended to the casing at the borehole opening, and using a rotary drilling rig power head to drive the casing to rotate and drill; when it is necessary to extend the casing again, using a rotary drilling rig power head to drive the drive ring to rotate relative to the inner ring in a second direction by a preset angle, so that the first pin is pulled out from the pin hole opened on the circumferential sidewall of the casing at the borehole opening, thereby disengaging the inner ring from the casing at the borehole opening.

[0014] The present invention achieves the following technical effects compared to the prior art: This invention provides a casing driver and a method for operating the casing driver. When the rotary drilling rig power head drives the drive to rotate around the axis of the drive ring in a first direction by a preset angle, the first pin shaft can move inward and be inserted into a pin hole opened on the circumferential side wall of the casing, thereby fixing the casing to the casing driver. This allows the casing to be rotated by the casing driver for rotary drilling. When the rotary drilling rig power head drives the drive to rotate around the axis of the drive ring in a second direction by a preset angle, the first pin shaft can move outward and be pulled out from the pin hole opened on the circumferential side wall of the casing, thereby disengaging the casing driver from the casing. In other words, the first pin shaft can be installed or removed from the casing simply by rotating the drive ring by the rotary drilling rig power head. This eliminates the need for manual installation and the use of tools such as ladders, improving the safety of disassembling and installing the pin shaft. Furthermore, the power of the rotary drilling rig power head eliminates the need for an additional power source to install and remove the pin shaft, and eliminates the problem of pipeline entanglement during the rotation of the casing driver, improving the convenience of the disassembly and installation process. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a horizontal cross-sectional view of the bushing actuator in some embodiments of Example 1; Figure 2 This is a cross-sectional view of the sleeve actuator AA when the first pin is inserted into the pin hole on the circumferential side wall of the sleeve in some embodiments of Example 1. Figure 3 This is a cross-sectional view of the sleeve actuator AA when the first pin is pulled out from the pin hole on the circumferential side wall of the sleeve in some embodiments of Example 1. Figure 4 This is a cross-sectional view of the bushing actuator BB in some embodiments of Example 1; Figure 5 This is a schematic diagram of the outer ring structure in some embodiments of Example 1; Figure 6 This is a schematic diagram of the power connector structure in some embodiments of Example 1; Figure 7 This is a schematic diagram of the pull-up connector structure in some embodiments of Example 1; Figure 8 This is a schematic diagram of the power seat structure in some embodiments of Example 1.

[0017] In the diagram: 1-Drive ring; 11-First pin hole; 12-Drive tube; 13-Power connector; 2-Inner ring; 21-Second pin hole; 22-First elongated hole; 23-Second elongated hole; 24-Lifting connector; 25-Power seat; 26-Sleeve female connector; 3-First pin; 31-Bush sleeve; 32-Elastic element; 4-Outer ring; 41-Third pin hole; 42-Baffle; 43-Rib; 44-Fixing ring; 5-Cam; 6-Connecting rod; 7-Second pin; 71-Protrusion. Detailed Implementation

[0018] 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.

[0019] The purpose of this invention is to provide a sleeve driver and a sleeve driver operating method to solve the problems existing in the prior art and improve the safety and convenience of disassembling and installing the pin.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1 This embodiment provides a bushing actuator, such as Figures 1-8As shown, the device includes a drive ring 1 and an inner ring 2 coaxially arranged. The top end of the drive ring 1 is fixedly connected to the power head of the rotary drilling rig. The bottom end of the inner ring 2 is fitted onto the outside of the casing. The drive ring 1 is fitted onto the outside of the inner ring 2 and can rotate relative to the inner ring 2 by a preset angle. The bottom end of the inner ring 2 extends from the bottom end of the drive ring 1. A first pin 3 is provided on the side wall of the part of the inner ring 2 that extends from the drive ring 1. When the power head of the rotary drilling rig drives the drive ring 1 to rotate around the axis of the drive ring 1 in a first direction by a preset angle, the first pin 3 can move inward and be inserted into the pin hole opened on the circumferential side wall of the casing, thereby fixing the casing to the casing driver, so that the casing can be rotated by the casing driver to perform rotary drilling. When the rotary drilling rig's power head drives the drive ring 1 to rotate around its axis in the second direction by a preset angle, the first pin 3 can move outward and be pulled out from the pin hole on the circumferential side wall of the casing, thereby disengaging the casing driver from the casing. In other words, the first pin 3 can be installed or removed from the casing simply by rotating the drive ring 1 by the rotary drilling rig's power head. This eliminates the need for manual installation and the use of tools such as ladders, improving the safety of pin installation and removal. Furthermore, the power of the rotary drilling rig's power head eliminates the need for an additional power source to install and remove the pin, and eliminates the problem of pipeline entanglement during the casing driver's rotation, thus improving the convenience of pin installation and removal.

[0022] In some embodiments, a bushing 31 is sleeved on the outside of the first pin 3, and the end of the bushing 31 is fixedly connected to the side wall of the inner ring 2. An elastic element 32 is provided between the bushing 31 and the pin. When the first pin 3 moves outward, the elastic element 32 is compressed, and the first pin 3 is pulled out from the pin hole opened in the circumferential side wall of the sleeve, thereby separating the inner tube from the sleeve. The elastic element 32 recovers and enables the first pin 3 to move inward to be inserted into the pin hole opened in the circumferential side wall of the sleeve, thereby fixing the sleeve driver to the sleeve.

[0023] In some embodiments, the sleeve actuator further includes an outer ring 4, a cam 5, and a connecting rod 6. The outer ring 4 is coaxially arranged with the drive ring 1 and is sleeved on the outside of the drive ring 1. The drive ring 1 can rotate relative to the outer ring 4 by a preset angle. The end of the first pin 3 away from the axis of the inner ring 2 is hinged to the center of the cam 5. Under the action of the elastic element 32, the elliptical fan-shaped outer contour of the cam 5 remains in contact with the end of the bushing 31 away from the axis of the inner ring 2. The connecting rod 6 is arranged vertically. The top end of the connecting rod 6 is hinged to the outer wall of the outer ring 4, and the bottom end of the connecting rod 6 is hinged to the side of the cam 5 away from the elliptical fan-shaped outer contour. When the drive ring 1 rotates in the second direction by a preset angle, it can drive the outer ring 4 to move upward from the first height to the second height, and the connecting rod 6 drives the outer ring 4 to move upward from the first height to the second height. Cam 5 rotates counterclockwise around the center. The distance from the end of bushing 31 away from the axis of inner ring 2 to the center of cam 5 reaches its maximum value. The first pin 3 compresses the elastic element 32 and moves outward and is pulled out from the pin hole opened on the circumferential side wall of the sleeve, thereby disengaging the sleeve driver from the sleeve. When the drive ring 1 rotates at a preset angle in the first direction, under the action of gravity, the outer ring 4 moves down from the second height to the first height. The connecting rod 6 drives cam 5 to rotate clockwise around the center. The distance from the end of bushing 31 away from the axis of inner ring 2 to the center of cam 5 reaches its minimum value. Under the restoring force of the elastic element 32, the first pin 3 moves inward and is inserted into the pin hole opened on the circumferential side wall of the sleeve, thereby fixing the sleeve driver to the sleeve.

[0024] In some embodiments, at least two circular first pin holes 11 are formed on the circumferential sidewall of the drive ring 1, and corresponding second pin holes 21 are formed on the circumferential sidewall of the inner ring 2. The second pin holes 21 include a first elongated hole 22 and a second elongated hole 23. The first elongated hole 22 extends horizontally, and the bottom end of the second elongated hole 23 communicates with the end of the first elongated hole 22 near the second direction. The top end and bottom end of the second elongated hole 23 are spaced apart in the height direction, and the top end of the second elongated hole 23 is inclined towards the second direction relative to its bottom end. A third pin hole 41 is formed on the circumferential sidewall of the outer ring 4. The third pin hole 41 includes a third elongated hole formed horizontally. The third pin hole 41 and the second pin holes 21 are... The projections on the horizontal plane overlap. A second pin 7 is inserted into the first pin hole 11, the second pin hole 21, and the third pin hole 41. When the drive ring 1 rotates at a preset angle in the second direction, it drives the second pin 7 to move from the end of the first elongated hole 22 away from the second elongated hole 23 to the top of the second elongated hole 23, thereby driving the outer ring 4 to move upward from the first height to the second height, thus lifting the connecting rod 6 and further causing the cam 5 to rotate counterclockwise around the center. When the drive ring 1 rotates at a preset angle in the first direction, it drives the second pin 7 to move from the top of the second elongated hole 23 to the end of the first elongated hole 22 away from the second elongated hole 23, thereby driving the outer ring 4 to move downward from the second height to the first height. The connecting rod 6 descends under the action of gravity and the cam 5 rotates clockwise around the center. Specifically, there is a gap between the outer ring 4 and the inner ring 2 and the drive ring 1. When the drive ring 1 drives the second pin 7 to rotate, the outer ring 4 and the inner ring 2 will not rotate with the drive ring 1 under the action of gravity, thereby causing the second pin 7 to move along the second pin hole 21 and the third pin. The preset angle is the angle of the arc of the projection of the second pin hole 21 onto the horizontal plane. The elastic element 32 is a spring, and the first direction is... Figure 1 The clockwise direction in the middle, the second direction is Figure 1 The counterclockwise direction.

[0025] In some embodiments, a baffle 42 is also fixedly provided on the outer ring 4 at the third pin hole 41 to isolate the first pin hole 11, the second pin hole 21 and the third pin hole 41 from the outside, so as to achieve the closure of the outer wall of the sleeve driver.

[0026] In some embodiments, the second pin 7 has a protrusion 71 at the end away from the axis of the drive ring 1. The protrusion 71 abuts against the outer side wall of the outer ring 4 to limit the radial displacement of the second pin 7 when the first pin hole 11 drives the second pin 7 to move along the second pin hole 21 and the third pin hole 41, thereby maintaining the stability of the sleeve drive operation.

[0027] In some embodiments, the drive ring 1 includes a drive tube 12 and a power connector 13. The power connector 13 is sleeved on the outside of the inner ring 2 and is used to drive the inner ring 2 to rotate during drilling. A first pin hole 11 is formed on the side wall of the power connector 13. The drive tube 12 is fixedly set at the top of the power connector 13. The top of the drive tube 12 is used to be fixedly connected to the power head of the rotary drilling rig to transmit torque and drilling pressure to the power connector 13. In some embodiments, the inner ring 2 includes a lifting connector 24, a power seat 25, and a casing female connector 26. The lifting connector 24 is set inside the power connector 13. A second pin hole 21 is formed on the side wall of the lifting connector 24. The power seat 25 is fixedly connected to the bottom end of the lifting connector 24. The casing female connector 26 is fixedly connected to the bottom end of the power seat 25. The casing female connector 26 is used to be sleeved on the outside of the casing. A first pin 3 is set on the side wall of the casing female connector 26 to move inward or outward along the pin seat fixedly set on the side wall of the casing female connector 26. In some embodiments, a power key is fixedly connected to the bottom end of the power connector 13, and a keyway is provided at the top end of the power seat 25. When the drive ring 1 rotates at a preset angle in the first direction, the power key can move in the keyway to move the first pin 3 inward and insert it into the pin hole opened on the circumferential side wall of the casing. Then, during drilling, the power key continues to rotate in the first direction. At this time, the end of the power key remains in contact with the keyway, and the torque and drilling pressure are transmitted to the power seat 25 through the power connector 13, and the casing will not separate from the inner ring 2.

[0028] In some embodiments, a stiffener 43 is fixedly provided on the outer side wall of the outer ring 4. The stiffener 43 is arranged radially along the outer ring 4, and the top end of the connecting rod 6 is hinged to the stiffener 43, so that the connecting rod 6 and the cam 5 can rotate in the plane along the radial direction of the outer ring 4 where the stiffener 43 is located. In some embodiments, a fixing ring 44 is also sleeved on the outer side of the outer ring 4, and the stiffener 43 is fixedly disposed between the fixing ring 44 and the outer side wall of the outer ring 4 to improve the stability of the stiffener 43 structure.

[0029] Example 2 This embodiment provides a method for operating a bushing actuator, including the following steps: Place the sleeve to be extended on the ground; The inner ring 2 is fitted onto the outside of the casing to be extended, and the first pin 3 is aligned with the pin hole on the side wall of the casing. When the drive ring 1 is rotated relative to the inner ring 2 by a preset angle by the power head of the rotary drilling rig, the second pin 7 is moved from the top of the second elongated hole 23 to the end of the first elongated hole 22 away from the second elongated hole 23, so as to move the outer ring 4 from the second height down to the first height. The connecting rod 6 descends under the action of gravity and the cam 5 rotates clockwise around the center. The distance from the end of the bushing 31 away from the axis of the inner ring 2 to the center of the cam 5 reaches the minimum value. Under the restoring force of the elastic element 32, the first pin 3 moves inward and is inserted into the pin hole on the circumferential side wall of the casing, so that the inner ring 2 is fixedly connected to the casing to be extended. Connect the casing to be extended to the casing at the borehole opening, and use the power head of the rotary drilling rig to drive the casing to rotate and drill in; When the casing needs to be extended again, the power head of the rotary drilling rig drives the drive ring 1 to rotate relative to the inner ring 2 in the second direction by a preset angle. This causes the second pin 7 to move from the end of the first elongated hole 22 away from the second elongated hole 23 to the top of the second elongated hole 23, thereby driving the outer ring 4 to move upward from the first height to the second height. This lifts the connecting rod 6 and further causes the cam 5 to rotate counterclockwise around the center. The distance from the end of the bushing 31 away from the axis of the inner ring 2 to the center of the cam 5 reaches its maximum value. The first pin 3 compresses the elastic element 32 and moves it outward and is pulled out from the pin hole opened on the circumferential side wall of the casing, so that the inner ring 2 is disengaged from the casing at the orifice.

[0030] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A drive sleeve, characterized by: The application relates to a driving ring and an inner ring coaxially arranged, the top end of the driving ring is used for fixed connection with a rotary drilling machine power head, the bottom end of the inner ring is used for sleeving outside a casing, the driving ring is sleeved outside the inner ring and can rotate by a preset angle relative to the inner ring, the bottom end of the inner ring extends from the bottom end of the driving ring, a first pin shaft is arranged on the side wall of the part of the inner ring extending from the driving ring, when the rotary drilling machine power head drives the driving ring to rotate by a preset angle around the axis of the driving ring towards a first direction, the first pin shaft can be moved inwards and inserted into a pin shaft hole arranged on the circumferential side wall of the casing, when the rotary drilling machine power head drives the driving ring to rotate by a preset angle around the axis of the driving ring towards a second direction, the first pin shaft can be moved outwards and pulled out of the pin shaft hole arranged on the circumferential side wall of the casing.

2. The drive sleeve according to claim 1, characterized in that: A shaft sleeve is sleeved outside the first pin shaft, the end of the shaft sleeve is fixedly connected with the side wall of the inner ring, an elastic element is arranged between the shaft sleeve and the pin shaft, when the first pin shaft moves outwards, the elastic element is compressed, and the elastic element can move the first pin shaft inwards when recovering.

3. The cannula driver of claim 2, wherein: Further comprising: an outer ring coaxially arranged with the driving ring, the outer ring being sleeved outside the driving ring, the driving ring being able to rotate by a preset angle relative to the outer ring; a cam, one end of the first pin shaft away from the axis of the inner ring being hingedly connected with the center of the cam, under the action of the elastic element, the oval fan-shaped outer contour of the cam keeps abutting against one end of the shaft sleeve away from the axis of the inner ring; a connecting rod, the connecting rod being vertically arranged, the top end of the connecting rod being hingedly connected with the outer side wall of the outer ring, the bottom end of the connecting rod being hingedly connected with one side of the cam away from the oval fan-shaped outer contour; when the driving ring rotates by a preset angle towards the second direction, the outer ring can be driven to move upwards from a first height to a second height, the connecting rod drives the cam to rotate counterclockwise around the center, the distance between one end of the shaft sleeve away from the axis of the inner ring and the center of the cam reaches a maximum value, the first pin shaft is moved outwards and pulled out of the pin shaft hole arranged on the circumferential side wall of the casing under the compression of the elastic element, when the driving ring rotates by a preset angle towards the first direction, the outer ring can be driven to move downwards from the second height to the first height, the connecting rod drives the cam to rotate clockwise around the center, the distance between one end of the shaft sleeve away from the axis of the inner ring and the center of the cam reaches a minimum value, and the first pin shaft is moved inwards and inserted into the pin shaft hole arranged on the circumferential side wall of the casing under the restoring force of the elastic element.

4. The cannula driver of claim 3, wherein: At least two circular first pin holes are formed on the circumferential side wall of the driving ring, and corresponding second pin holes are formed on the circumferential side wall of the inner ring, the second pin holes include a first long circular hole and a second long circular hole, the first long circular hole extends in the horizontal direction, the bottom end of the second long circular hole is communicated with one end of the first long circular hole close to the second direction, the top end of the second long circular hole has a spacing from the bottom end of the second long circular hole in the height direction, and the top end of the second long circular hole is inclined towards the second direction relative to the bottom end of the second long circular hole, corresponding third pin holes are formed on the circumferential side wall of the outer ring, the third pin holes include a third long circular hole formed in the horizontal direction, the projection of the third pin hole on the horizontal plane coincides with the second pin hole, and a second pin shaft is arranged in the first pin hole, the second pin hole and the third pin hole, when the driving ring rotates by a preset angle towards the second direction, the second pin shaft is moved from the end of the first long circular hole away from the second long circular hole to the top end of the second long circular hole, so as to drive the outer ring to move upwards from the first height to the second height, and when the driving ring rotates by a preset angle towards the first direction, the second pin shaft is moved from the top end of the second long circular hole to the end of the first long circular hole away from the second long circular hole, so as to drive the outer ring to move downwards from the second height to the first height.

5. The cannula driver of claim 4, wherein: A baffle is further fixedly arranged at the position of the outer ring in the third pin hole, so as to separate the first pin hole, the second pin hole and the third pin hole from the outside.

6. The cannula driver of claim 4, wherein: The end of the second pin shaft away from the axis of the driving ring has a protruding part, which abuts against the outer side wall of the outer ring, so as to limit the radial displacement of the second pin shaft.

7. The cannula driver of claim 1, wherein: The driving ring includes a driving flower tube and a power joint, the power joint is sleeved on the outside of the inner ring, is used for driving the inner ring to rotate during drilling, the first pin hole is formed on the side wall of the power joint, the driving flower tube is fixedly arranged at the top end of the power joint, and the top end of the driving flower tube is used for fixedly connecting with the power head of the rotary drilling machine.

8. The cannula driver of claim 4, wherein: The inner ring includes a lifting joint, a power seat and a casing female joint, the lifting joint is arranged on the inside of the power joint, the second pin hole is formed on the side wall of the lifting joint, the power seat is fixedly connected at the bottom end of the lifting joint, the casing female joint is fixedly connected at the bottom end of the power seat, the casing female joint is used for sleeving on the outside of the casing, and the first pin shaft is arranged on the side wall of the casing female joint.

9. The cannula driver of claim 3, wherein: A rib plate is fixedly arranged on the outer side wall of the outer ring, the rib plate is arranged along the radial direction of the outer ring, and the top end of the connecting rod is hinged to the rib plate.

10. A method of operating a drive sleeve, characterized by: The casing driver of any one of claims 1-9 is adopted, and the method comprises the following steps: Placing the casing to be connected on the ground; Sleeving the inner ring on the outside of the casing to be connected, driving the driving ring to rotate by a preset angle relative to the inner ring towards the first direction through the power head of the rotary drilling machine, inserting the first pin shaft into the pin shaft hole formed on the circumferential side wall of the casing to be connected, so as to fixedly connect the inner ring with the casing to be connected; The casing to be connected is connected with the casing at the orifice, and the casing is rotated and drilled in by the power head of the rotary drilling rig; When the casing needs to be connected again, the driving ring is rotated by the power head of the rotary drilling rig relative to the inner ring in a second direction by a preset angle, so that the first pin shaft is pulled out of the pin shaft hole opened in the circumferential side wall of the casing at the orifice, so that the inner ring is separated from the casing at the orifice.

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