A cylinder top-driven full-rotation full-casing drilling main body device

Abstract

The present invention discloses a main body device for oil-cylinder top-drive full-rotation full-casing drilling, comprising a base frame, a casing clamp, a top-drive rotary mechanism, and a lifting and pulling pressure cylinder; the casing clamp is used to clamp the casing; the top-drive rotary mechanism is used to drive the casing clamp to rotate about the centerline of the clamped casing; the base frame includes a chassis, which is provided with at least three mutually parallel column slide rails, and the top-drive rotary mechanism is slidably mounted on all of the column slide rails; the chassis is provided with a second through hole for the casing to pass through, and two lower slips are slidably mounted on the chassis, respectively located on either side of the second through hole, and a clamping cylinder is provided on the chassis corresponding to each lower slip, the clamping cylinder being used to drive the corresponding lower slip to move radially along the second through hole; the two lower slips are capable of clamping the casing; and the lifting and pulling pressure cylinder is fixed to the chassis and is used to drive the top-drive rotary mechanism to slide along the column slide rails. The present invention simplifies the drive structure for full-casing drilling.

Description

Technical Field

[0001] The invention relates to the technical field of drilling tools, in particular to an oil cylinder top-driven full-rotation full-casing drilling main body device. Background Art

[0002] High-speed railways, highways, urban rail transit, and high-rise buildings mostly use reinforced concrete bored piles as their foundation. As the scale of buildings gradually increases, the requirements for bored piles are also getting higher and higher. However, when bored piles are constructed in areas with complex geological conditions, the mud wall protection effect is not effective, which can easily lead to hole collapse, hole expansion, and low concrete filling coefficient. For this reason, full-casing bored pile construction equipment is often used. It not only speeds up the construction speed, but also has no mud pollution, can better protect the wall, and effectively ensure the construction quality. Full-casing drilling generally refers to the use of a casing drill rig to apply torque and vertical load to the casing at the same time. At present, the equipment used for full-casing drilling construction mainly includes two types: shaking full-casing drilling rigs and hydraulic motor-driven full-rotation full-casing drilling rigs.

[0003] A rocking full-casing drilling rig, also known as a pipe twister, utilizes a hydraulic cylinder to twist the casing, causing it to reciprocate around its center at a specific angle (typically 18°-25°) to achieve full-casing drilling. Existing rocking full-casing drilling rigs (pipe twisters) use a telescoping hydraulic cylinder to drive the casing to reciprocate around its center at a specific angle (typically 18°-25°). This rotation angle is typically small, significantly limiting drilling depth and reducing drilling efficiency.

[0004] The main components of a hydraulic motor-driven, full-rotation, full-casing drilling rig consist primarily of a hydraulic motor, a reducer, a slewing bearing, and a large ring gear. The hydraulic motor is connected to the reducer, with multiple components distributed around the ring gear. The reducer's output gear meshes with the ring gear, driving its rotation. The slewing bearing offsets frictional resistance on the pressure-bearing surface during drilling and pressurization, and also serves as a centering mechanism. Existing hydraulic motor-driven, full-rotation, full-casing drilling rigs achieve full-rotation drilling through a hydraulic motor connected to the reducer, with multiple components distributed around the ring gear. The reducer's output gear meshes with the ring gear, driving its rotation. The slewing bearing offsets frictional resistance on the pressure-bearing surface during drilling and pressurization. This approach, to accommodate the required casing diameter (typically 1500mm-3000mm), requires extremely large components like the ring gear and slewing bearing. This requires high assembly precision, is difficult to process, and is expensive to manufacture. Furthermore, the complex structure makes problems that arise during construction difficult to resolve. Summary of the Invention

[0005] The purpose of the present invention is to provide a cylinder top-driven full-rotation full-casing drilling main body device to solve the problems existing in the above-mentioned prior art, simplify the driving structure of full-casing drilling, and reduce its production difficulty and manufacturing cost.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a top-drive full-rotation full-casing drilling main body device, comprising a base frame, a casing clamp, a top-drive rotary mechanism, and a lifting and pulling pressurizing oil cylinder;

[0008] The casing clamp is used to clamp the casing;

[0009] The top drive rotary mechanism is used to drive the casing clamp to perform rotary motion around the center line of the clamped casing;

[0010] The chassis includes a chassis, which is provided with at least three mutually parallel column slide rails, and the top drive rotary mechanism is slidably sleeved on all of the column slide rails; the chassis is provided with a second through hole for the sleeve to pass through, and two lower slips are slidably provided on the chassis, respectively located on both sides of the second through hole, and a clamping cylinder is provided on the chassis corresponding to each of the lower slips, and the clamping cylinder is used to drive the corresponding lower slip to move radially along the second through hole; the two lower slips can clamp the sleeve;

[0011] The lifting and pulling pressure oil cylinder is fixed on the chassis, and the lifting and pulling pressure oil cylinder is used to drive the top drive rotary mechanism to slide along the column slide rail.

[0012] Preferably, the top drive rotary mechanism includes a support frame, a turntable cylinder is passed through the support frame, and the turntable cylinder includes a center cylinder fixedly connected to the casing clamper, and an upper bearing panel, a counterclockwise wheel disc, a partition plate, a clockwise wheel disc and a lower bearing panel are fixedly sleeved on the center cylinder in sequence along the axial direction; two ends of the support frame are respectively fixedly mounted with a pressure-bearing centering disk sleeved on the center cylinder, and the center cylinder rotates in cooperation with the pressure-bearing centering disk; the upper bearing panel rolls in cooperation with one of the pressure-bearing centering disks; the lower bearing panel rolls in cooperation with the other pressure-bearing centering disk; each of the pressure-bearing centering disks is slidably sleeved on all the column slide rails;

[0013] A first driving unit is provided on each of the pressure-bearing centering disks, and the first driving unit includes at least one first driving mechanism arranged along the circumference of the center tube, and the first driving mechanism includes a top drive cylinder and a control cylinder. The free end of the piston rod of the top drive cylinder is provided with a clamping rod, and the clamping rod is clamped into the tooth groove of the counterclockwise pulley or the clockwise clamping disk. A connecting piece is fixed to the end of the top drive cylinder away from the clamping rod, and one end of the connecting piece is hinged to the pressure-bearing centering disk, and the other end is hinged to the free end of the piston rod of the control cylinder, and the end of the control cylinder away from the connecting piece is hinged to the pressure-bearing centering disk.

[0014] Preferably, the sleeve clamp includes a connecting plate fixedly connected to one end of the central tube, the connecting plate is provided with a first through hole for the sleeve to pass through, two sliding grooves are provided on the fixed plate, an upper cava is slidably provided in each of the sliding grooves, the two upper cava are respectively located on both sides of the first through hole, and the fixed plate is also provided with a second driving mechanism that can drive the two upper cava to move toward and away from each other.

[0015] Preferably, the pressure-bearing centering plate is provided with a third through hole corresponding to the center tube, and a cylindrical roller frame coaxial with the third through hole is provided in the third through hole, and the cylindrical roller frame is evenly provided with a plurality of centering cylindrical rollers rollingly engaged with the outer wall of the center tube along the circumferential direction, and the axial direction of the centering cylindrical roller is parallel to the axial direction of the third through hole.

[0016] Preferably, the pressure-bearing centering disk is provided with a plurality of load-bearing conical rollers arranged along the circumference of the center tube, and all the load-bearing conical rollers on one pressure-bearing centering disk are in rolling cooperation with the upper load-bearing panel; and all the load-bearing conical rollers on the other pressure-bearing centering disk are in rolling cooperation with the lower load-bearing panel.

[0017] Preferably, it further includes a push-pull rod, the two pressure-bearing centering plates are respectively fixedly connected to the push-pull rod, and the push-pull rod passes through the support frame; the free end of the piston rod of the lifting and pulling pressure cylinder is connected to the push-pull rod through a pin shaft.

[0018] Preferably, the second driving mechanism includes two second driving units symmetrically arranged about the center line connecting the two upper cavas, the second driving unit includes a clamping cylinder, an outer clamping arm and an inner clamping arm, one end of the outer clamping arm is hinged to one end of one of the upper cavas, one end of the inner clamping arm is hinged to one end of the other upper cavas, the inner clamping arm passes through the outer clamping arm, one end of the clamping cylinder is hinged to the other end of the outer clamping arm, and the other end is hinged to the other end of the inner clamping arm.

[0019] Preferably, there are four first driving mechanisms.

[0020] Compared with the prior art, the present invention has achieved the following technical effects:

[0021] The oil cylinder top-driven full-rotation full-casing drilling main body device of the present invention simplifies the driving structure of the full-casing drilling and reduces its production difficulty and manufacturing cost.

[0022] The main body of the oil cylinder top-driven full-rotation full-casing drilling device of the present invention uses a hydraulic cylinder with a simple structure as a power unit to achieve the forward and reverse full-rotation function; the friction problem of the contact surface during pressurized drilling is solved by the form of a pressure-bearing centering plate, that is, the vertical load is transferred to the turntable barrel by the load-bearing conical roller; the center of the turntable barrel is stabilized by the centering cylindrical roller. The main body of the oil cylinder top-driven full-rotation full-casing drilling device of the present invention completely replaces the hydraulic motor, reducer, large gear ring, rotary support and other components with complex structure, high processing precision and high cost. It is easier to obtain a greater torque output by stacking multiple layers of rotary discs or increasing the number of top-driven oil cylinders. The present invention can flexibly match the rotary discs and top-driven oil cylinders according to actual needs. Due to the simple power structure, problems are easy to check, which is conducive to solving on-site problems and has low maintenance costs.

[0023] The present invention realizes 360° forward and reverse bidirectional continuous rotation of the rotating body by driving the rotating wheel discs with different directions through the oil cylinder top. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic structural diagram of the main body device of the oil cylinder top drive type full rotation and full casing drilling from the first perspective of the present invention;

[0026] Figure 2 This is a structural schematic diagram of the main body device of the oil cylinder top drive type full rotation and full casing drilling from a second perspective of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the top drive rotary mechanism in the main body device of the oil cylinder top drive full rotary full casing drilling of the present invention;

[0028] Figure 4 for Figure 3 AA cross-section of

[0029] Figure 5 for Figure 3 BB cross-section diagram;

[0030] Figure 6 This is a schematic structural diagram of the support frame in the main body device of the oil cylinder top drive full-rotation full-casing drilling device of the present invention;

[0031] Figure 7 It is a structural schematic diagram of the pressure-bearing centering plate in the main body device of the oil cylinder top-driven full-rotation full-casing drilling device of the present invention;

[0032] Figure 8 for Figure 7 AA cross-section diagram;

[0033] Figure 9 It is a structural schematic diagram of the rotary drum in the main body device of the oil cylinder top drive type full rotary full casing drilling of the present invention;

[0034] Figure 10 This is a structural schematic diagram of the rotary disc in the main body device of the oil cylinder top drive full-rotation full-casing drilling device of the present invention from another perspective;

[0035] Figure 11 This is a schematic structural diagram of the sleeve clamp in the main body device of the oil cylinder top drive full rotation full casing drilling of the present invention;

[0036] Figure 12 This is a structural schematic diagram of the sleeve clamp in the main body device of the oil cylinder top drive type full rotation full casing drilling according to the present invention from another perspective;

[0037] Figure 13 This is a front view of the underframe of the main body device of the oil cylinder top drive full rotary full casing drilling device of the present invention;

[0038] Figure 14 A top view of the underframe of the main body of the oil cylinder top-driven full-rotation full-casing drilling device of the present invention;

[0039] Including: 1. Base frame; 11. Chassis; 12. Column slide rail; 13. Clamping cylinder; 14. Lower slip; 2. Casing clamp; 21. Upper slip chute; 22. Connecting plate; 23. Inner arm; 24. Outer arm; 25. Stop block; 26. Upper slip; 27. Female connector; 28. Clamping cylinder; 3. Top drive slewing mechanism; 31. Turntable cylinder; 311. Center cylinder; 312. Upper bearing panel; 31 3. Counterclockwise wheel; 314. Partition plate; 315. Clockwise wheel; 316. Lower bearing panel; 32. Pressure-bearing centering plate; 321. Mounting panel; 322. Bearing tapered roller; 323. Tapered roller frame; 324. Centering cylindrical roller; 325. Cylindrical roller frame; 33. Control cylinder; 34. Top drive cylinder; 35. Support frame; 36. Bearing nut; 37. Push and pull rod; 4. Lifting and pulling pressure cylinder. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] The purpose of the present invention is to provide a cylinder top-driven full-rotation full-casing drilling main body device to solve the problems existing in the above-mentioned prior art, simplify the driving structure of full-casing drilling, and reduce its production difficulty and manufacturing cost.

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] like Figures 1 to 14 As shown: This embodiment provides a cylinder top-driven full-rotation full-casing drilling main body device, including a base frame 1, a casing clamper 2, a top-driven rotary mechanism 3 and a pulling and pressurizing cylinder 4.

[0044] Among them, the casing clamp 2 is used to clamp the casing; specifically, the casing clamp 2 includes a connecting plate 22, a first through hole for the casing to pass through is provided on the connecting plate 22, two slide grooves are provided on the fixed plate, and an upper cava 26 is slidably provided in each slide groove. The two upper cava 26 are respectively located on both sides of the first through hole, and a second driving mechanism that can drive the two upper cava 26 to move toward and away from each other is also provided on the fixed plate.

[0045] The second drive mechanism includes two second drive units symmetrically arranged about the centerline connecting the two upper slips 26. These units include a clamping cylinder 28, an outer arm 24, and an inner arm 23. One end of the outer arm 24 is hinged to one end of one upper slip 26, while one end of the inner arm 23 is hinged to one end of the other upper slip 26. The inner arm 23 passes through the outer arm 24. One end of the clamping cylinder 28 is hinged to the other end of the outer arm 24, and the other end is hinged to the other end of the inner arm 23. The casing clamp 2 also includes four stoppers 25, one at each end of each upper slip 26. These stoppers 25 limit the inner arm 23 or outer arm 24, preventing them from rotating excessively outward.

[0046] The operating principle of the casing clamp 2 is as follows: when the casing needs to be clamped, the clamping cylinder 28 extends, the upper slips 26 slide out of the upper slip chute 21 toward the center of the first through hole, and the inner and outer clamping arms 23 and 24 simultaneously rotate inward to clamp the casing. When the casing needs to be released, the clamping cylinder 28 shortens, the inner and outer clamping arms 23 and 24 rotate outward simultaneously to the stop block 25, and the upper slips 26 slide along the upper slip chute 21 away from the center to release the casing.

[0047] The top drive rotary mechanism 3 is used to drive the casing clamper 2 to rotate around the center line of the clamped casing; specifically, the top drive rotary mechanism 3 includes a support frame 35, a turntable cylinder 31 is passed through the support frame 35, and the turntable cylinder 31 does not contact the support frame 35; the turntable cylinder 31 includes a central cylinder 311 fixedly connected to the casing clamper 2, and an upper bearing panel 312, a counterclockwise pulley 313, a partition plate 314, a clockwise pulley 315 and a lower bearing panel 316 are fixedly sleeved on the central cylinder 311 in sequence along the axial direction; a pressure-bearing centering disk 32 sleeved on the central cylinder 311 is fixedly installed at both ends of the support frame 35, and the central cylinder 311 is rotationally matched with the pressure-bearing centering disk 32; the upper bearing panel 312 is in rolling cooperation with one pressure-bearing centering disk 32; the lower bearing panel 316 is in rolling cooperation with the other pressure-bearing centering disk 32.

[0048] In this embodiment, each pressure-bearing centering plate 32 is equipped with multiple load-bearing tapered rollers 322 arranged circumferentially around the central tube 311. All load-bearing tapered rollers 322 on one pressure-bearing centering plate 32 roll with the upper load-bearing panel 312; all load-bearing tapered rollers 322 on the other pressure-bearing centering plate 32 roll with the lower load-bearing panel 316. The load-bearing tapered rollers 322 are pin-connected to tapered roller holders 323 and then evenly distributed around the central tube 311 on the mounting panel 321 of the pressure-bearing centering plate 32. There are six sets of load-bearing tapered rollers and tapered roller holders 323, and the tapered roller holders 323 are bolted to the mounting panel 321.

[0049] In this embodiment, the pressure-bearing centering plate 32 is provided with a third through-hole corresponding to the center cylinder 311. A cylindrical roller carrier 325 is disposed within the third through-hole, coaxially with the third through-hole. Cylindrical roller carrier 325 is evenly distributed along the circumference of 12 centering cylindrical rollers 324, which roll against the outer wall of the center cylinder 311. The axial direction of the centering cylindrical rollers 324 is parallel to the axial direction of the third through-hole. The centering cylindrical rollers 324 are connected to the cylindrical roller carrier 325 by pins.

[0050] Each pressure-bearing centering disc 32 is provided with a first drive unit, which includes at least one first drive mechanism arranged circumferentially along the central tube 311. The first drive mechanism includes a top drive cylinder 34 and a control cylinder 33. The free end of the piston rod of the top drive cylinder 34 is provided with a clamping rod, which engages with the tooth groove of the counterclockwise wheel 313 or the clockwise clamping rod. The end of the top drive cylinder 34 away from the clamping rod is fixed with a connecting piece, and one end of the connecting piece is hinged to the pressure-bearing centering disc 32, and the other end is hinged to the free end of the piston rod of the control cylinder 33. The end of the control cylinder 33 away from the connecting piece is hinged to the pressure-bearing centering disc 32. The first drive unit on the pressure-bearing centering disc 32 above the support frame 35 is used to drive the counterclockwise wheel 313 to rotate counterclockwise, while the first drive unit on the pressure-bearing centering disc 32 below the support frame 35 is used to drive the clockwise wheel 315 to rotate clockwise.

[0051] The top drive slewing mechanism 3 has two driving modes: counterclockwise slewing mode and clockwise slewing mode:

[0052] (1) In the counterclockwise rotation mode, the top drive cylinder 34 connected to the clockwise wheel 315 is controlled by the corresponding control cylinder 33, and the cylinder rod of the control cylinder 33 is retracted, and the cylinder rod pin of the top drive cylinder 34 is completely disengaged from the tooth groove; the top drive cylinder 34 connected to the counterclockwise wheel 313 is controlled by the corresponding control cylinder 33, and the cylinder rod of the control cylinder 33 is extended to the position and the pressure is maintained (this pressure is the set system pressure of the control cylinder 33), so that the cylinder rod pin of the top drive cylinder 34 is tightly fitted with the outer tooth profile of the counterclockwise wheel 313. The four groups of top drive cylinders 34 are extended at the same time to push the counterclockwise wheel 313 to rotate. After one stroke, the top drive cylinder 34 is retracted, and its cylinder rod pin moves in accordance with the tooth profile under the action of the control cylinder 33. After retracting to the position, it is automatically stuck in the next tooth groove. The top drive cylinder 34 reciprocates in this way to realize the counterclockwise rotation of the turntable 31.

[0053] (2) In the clockwise rotation mode, the top drive cylinder 34 connected to the counterclockwise wheel 313 is controlled by the corresponding control cylinder 33, and the cylinder rod of the control cylinder 33 is retracted, and the cylinder rod pin of the top drive cylinder 34 is completely disengaged from the tooth groove; the top drive cylinder 34 connected to the clockwise wheel 315 is controlled by the corresponding control cylinder 33, and the cylinder rod of the control cylinder 33 is extended to the position and the pressure is maintained (this pressure is the set system pressure of the control cylinder 33), so that the cylinder rod pin of the top drive cylinder 34 is tightly fitted with the outer tooth profile of the clockwise wheel 315. The four groups of top drive cylinders 34 are extended at the same time to push the clockwise wheel 315 to rotate. After one stroke, the top drive cylinder 34 is retracted, and its cylinder rod pin moves in accordance with the tooth profile under the action of the control cylinder 33. After retracting to the position, it is automatically stuck in the next tooth groove. The top drive cylinder 34 is reciprocated in this way to realize the clockwise rotation of the turntable drum 31.

[0054] In this embodiment, two sleeve clamps 2 are included. The female connector 27 on the connecting plate 22 of one sleeve clamp 2 is fixedly connected to the male connector at the top end of the hollow tube, and the female connector 27 on the connecting plate 22 of the other sleeve clamp 2 is fixedly connected to the male connector at the bottom end of the hollow tube.

[0055] The base frame 1 includes a chassis 11 , and a column slide rail 12 is provided at each of the four corners of the chassis 11 . The four column slide rails 12 are parallel to each other and are all vertically arranged. The support frame 35 and each pressure-bearing centering plate 32 are slidably mounted on all the column slide rails 12 .

[0056] A second through hole for the casing to pass through is provided on the chassis 11. Two lower slips 14 are respectively located on both sides of the second through hole. Two clamping cylinders 13 are provided on the chassis 11 corresponding to each lower slip 14. The clamping cylinders 13 are used to drive the corresponding lower slip 14 to move radially along the second through hole, driving the lower slip 14 to move toward or away from the center of the second through hole; the chassis 11 can clamp or loosen the casing through the two lower slips 14.

[0057] The lifting and pressurizing oil cylinder 4 is fixed on the chassis 11 , and is used to drive the top drive rotary mechanism 3 to slide along the column slide rail 12 .

[0058] In this embodiment, two push-pull rods 37 are further provided in the top drive rotary mechanism 3, and two pressure-bearing centering plates 32 are respectively fixedly connected to each push-pull rod 37, and each push-pull rod 37 passes through the support frame 35 and is fixedly connected to the support frame 35; the free end of the piston rod of the lifting and pulling pressure cylinder 4 is connected to the bottom end of the push-pull rod 37 through a pin shaft; the top end of the push-pull rod 37 is threadedly connected to a load-bearing nut 36.

[0059] The specific pressurized drilling process of the oil cylinder top drive full-rotation full-casing drilling main body device of this embodiment is as follows:

[0060] (1) Clamp the casing to the center through the lower slips 14 in the chassis 11;

[0061] (2) The two sleeve clamps 2 are used to clamp the sleeves respectively;

[0062] (3) The two lower slips 14 in the chassis 11 release the clamping force on the casing;

[0063] (4) The turntable 31 is driven to rotate by a top drive mode, and the turntable 31 drives the casing holder 2 to rotate and then drives the casing to rotate;

[0064] (5) Full casing pressurized drilling is achieved by controlling the retraction of the pull-out pressurized oil cylinder 4;

[0065] (6) After a pressurized drilling process is completed, the lower slips 14 in the chassis 11 are used to continue clamping the casing, and the clamping of the casing by the two casing clamps 2 is released, and then the pulling and pressurizing cylinder 4 is extended;

[0066] (7) After the lifting and pressurizing oil cylinder 4 is extended to the right position, repeat steps (1) to (5) to carry out pressurized drilling of the next stroke;

[0067] (8) Repeat steps (6)-(7) until pressure drilling is completed.

[0068] It is easy to understand that the process of pulling out casing using the cylinder top-driven full-rotation full-casing drilling main body device of this embodiment is the reverse process of the above-mentioned pressurized drilling casing. The only difference is that the three-drive casing does not rotate during the pulling out process, which will not be elaborated here.

[0069] In the description of the present invention, it should be noted that the terms "center," "top," "bottom," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0070] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A top-drive, fully rotary, full-casing drilling main body device, characterized by: It includes a base frame, a casing clamp, a top drive slewing mechanism and a lifting and pulling pressure cylinder; The casing clamp is used to clamp the casing; The top drive rotary mechanism is used to drive the casing clamp to perform rotary motion around the center line of the clamped casing; The chassis includes a chassis, which is provided with at least three mutually parallel column slide rails, and the top drive rotary mechanism is slidably sleeved on all of the column slide rails; the chassis is provided with a second through hole for the sleeve to pass through, and two lower slips are slidably provided on the chassis, respectively located on both sides of the second through hole, and a clamping cylinder is provided on the chassis corresponding to each of the lower slips, and the clamping cylinder is used to drive the corresponding lower slip to move radially along the second through hole; the two lower slips can clamp the sleeve; The lifting and pulling pressure oil cylinder is fixed on the chassis, and the lifting and pulling pressure oil cylinder is used to drive the top drive rotary mechanism to slide along the column slide rail; The top drive rotary mechanism includes a support frame, a turntable cylinder is passed through the support frame, and the turntable cylinder includes a center cylinder fixedly connected to the casing clamper, and an upper bearing panel, a counterclockwise wheel disc, a partition plate, a clockwise wheel disc and a lower bearing panel are fixedly sleeved on the center cylinder in sequence along the axial direction; two ends of the support frame are respectively fixedly mounted with a pressure-bearing centering plate sleeved on the center cylinder, and the center cylinder rotates in cooperation with the pressure-bearing centering plate; the upper bearing panel rolls in cooperation with one of the pressure-bearing centering plates; the lower bearing panel rolls in cooperation with the other pressure-bearing centering plate; each pressure-bearing centering plate is slidably sleeved on all the column slide rails; A first driving unit is provided on each of the pressure-bearing centering disks, and the first driving unit includes at least one first driving mechanism arranged along the circumference of the center tube, and the first driving mechanism includes a top drive cylinder and a control cylinder. The free end of the piston rod of the top drive cylinder is provided with a clamping rod, and the clamping rod is clamped into the tooth groove of the counterclockwise pulley or the clockwise pulley, and a connecting piece is fixed to the end of the top drive cylinder away from the clamping rod, and one end of the connecting piece is hinged to the pressure-bearing centering disk, and the other end is hinged to the free end of the piston rod of the control cylinder, and the end of the control cylinder away from the connecting piece is hinged to the pressure-bearing centering disk.

2. The oil cylinder top drive full rotation full casing drilling main body device according to claim 1 is characterized in that: The sleeve clamp includes a connecting plate fixedly connected to one end of the central tube, a first through hole for the sleeve to pass through is provided on the connecting plate, two slide grooves are provided on the connecting plate, an upper cava is slidably provided in each of the slide grooves, and the two upper cava are respectively located on both sides of the first through hole. A second driving mechanism that can drive the two upper cava to move toward and away from each other is also provided on the connecting plate.

3. The oil cylinder top drive full rotation full casing drilling main body device according to claim 1 is characterized in that: The pressure-bearing centering plate is provided with a third through hole corresponding to the center tube, and a cylindrical roller frame coaxial with the third through hole is provided in the third through hole. The cylindrical roller frame is evenly provided with a plurality of centering cylindrical rollers rollingly engaged with the outer wall of the center tube along the circumferential direction, and the axial direction of the centering cylindrical roller is parallel to the axial direction of the third through hole.

4. The oil cylinder top drive full rotation full casing drilling main body device according to claim 1 is characterized in that: The pressure-bearing centering disc is provided with a plurality of load-bearing conical rollers arranged along the circumference of the central tube. All the load-bearing conical rollers on one pressure-bearing centering disc are in rolling cooperation with the upper load-bearing panel; all the load-bearing conical rollers on another pressure-bearing centering disc are in rolling cooperation with the lower load-bearing panel.

5. The oil cylinder top drive full rotation full casing drilling main body device according to claim 1 is characterized in that: It also includes a push-pull rod, the two pressure-bearing centering plates are respectively fixedly connected to the push-pull rod, and the push-pull rod passes through the support frame; the free end of the piston rod of the lifting and pulling pressure cylinder is connected to the push-pull rod through a pin shaft.

6. The oil cylinder top drive full rotation full casing drilling main body device according to claim 2, characterized in that: The second driving mechanism includes two second driving units symmetrically arranged about the center line connecting the two upper slips, and the second driving unit includes a tightening cylinder, an outer arm and an inner arm, one end of the outer arm is hinged to one end of one of the upper slips, one end of the inner arm is hinged to one end of the other upper slip, the inner arm passes through the outer arm, one end of the tightening cylinder is hinged to the other end of the outer arm, and the other end is hinged to the other end of the inner arm.

7. The oil cylinder top drive full rotation full casing drilling main body device according to claim 1, characterized in that: There are four first driving mechanisms.

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