An adjustable lifting clamping device for offshore oil pipes

Abstract

This invention relates to an adjustable lifting and clamping device for offshore tubing. It includes two opposing adjustable lifting and clamping units; each unit comprises a lifting device, a rotating clamping device, and an auxiliary support device. The rotating clamping device includes a first support, a second support, a first semi-ring block, a second semi-ring block, a first semi-gear ring, a second semi-gear ring, multiple clamps, and a drive mechanism. The first and second supports are slidably mounted on top of the lifting device along the X-direction. This invention controls the pitch angle of the tubing through the height difference between the two lifting devices, and the two lifting devices can be adjusted by translation to accommodate tubing of different sizes. Furthermore, the rotating clamping device allows for simultaneous fixing and rotation angle control of the tubing, enabling flexible adjustment of the tubing in various directions and improving the efficiency of tubing docking, maintenance, and commissioning.

Description

Technical Field

[0001] This invention relates to the field of lifting and clamping technology, and in particular to an adjustable lifting and clamping device for offshore oil pipes. Background Technology

[0002] Offshore oil and gas exploration is a crucial component of the modern energy industry, particularly in the development of deep-sea and ultra-deep-sea oil and gas fields, which presents numerous complex technological challenges. In offshore oil and gas platforms, pipelines serve as a vital transport medium, requiring docking, maintenance, and commissioning. Before deployment, pipelines undergo real-time inspection, involving installation, lifting, and clamping. These steps are typically performed under dynamic and complex sea conditions, and the pipelines themselves are substantial in size and weight. Current technologies often rely on traditional clamping structures for pipeline lifting, consisting of two fixed support clamps. The pipeline is hoisted onto these clamps and secured by clamping mechanisms. While this method effectively supports and secures the pipeline, it lacks the ability to adjust its orientation. For example, to rotate the pipeline, existing methods require first releasing the clamps, then re-lifting the pipeline into the air, rotating it to the desired angle, and finally placing it back onto the clamps for final clamping. Its lack of flexible adjustment capabilities reduces the efficiency of oil pipe connection, maintenance and debugging, and also carries certain risks. Summary of the Invention

[0003] Therefore, it is necessary to provide an adjustable lifting clamping device for offshore oil pipes to address the problem that the lack of flexible adjustment capability of existing clamping devices leads to reduced efficiency in oil pipe docking, maintenance and commissioning.

[0004] This invention provides an adjustable lifting clamping device for offshore oil pipes, comprising two adjustable lifting clamping units arranged opposite each other; each adjustable lifting clamping unit includes:

[0005] The lifting device is used to adjust the height to create a height difference between the two lifting devices, and the tilt angle at both ends of the oil pipe is controlled by the height difference;

[0006] A rotating clamping device, mounted on top of the lifting device, is used to secure the oil pipe and rotate it; and

[0007] An auxiliary support device is installed on top of the lifting device and is used to support the oil pipe before it is fixed.

[0008] The rotating clamping device includes:

[0009] The first and second supports are slidably mounted on the top of the lifting device along the X direction;

[0010] The first semi-ring block is rotatably connected to the first bracket along the X direction;

[0011] The second half-ring block is rotatably connected to the second bracket in the X direction, and the second half-ring block and the first half-ring block can be combined into a fixed ring by moving in the X direction.

[0012] The first and second half of the gear ring can be combined to form a rotary gear ring by moving along the X direction; the rotary gear ring and the fixed ring are coaxially arranged; the rotary gear ring and the fixed ring rotate relative to each other through a ring slide rail mechanism;

[0013] Multiple clamps are mounted on the rotary gear ring; these clamps are used to hold and secure the oil pipe located within the rotary gear ring; and

[0014] A drive mechanism that drives a rotary gear ring to rotate on a fixed ring.

[0015] As a preferred example, both lifting devices are scissor lift mechanisms;

[0016] Both lifting devices move along the Y direction.

[0017] As a preferred example, the auxiliary support device includes:

[0018] Two support seats are slidably mounted on top of the lifting device along the X direction;

[0019] Two rollers are mounted on two support bases respectively; when the two rollers are close together, they are used to support the oil pipe.

[0020] As a preferred embodiment, both the first support and the second support are equipped with a servo motor. One servo motor is used to drive the first semi-ring block to rotate along the X direction on the first support, and the other servo motor is used to drive the second semi-ring block to rotate along the X direction on the second support.

[0021] As a preferred example, the first semi-ring block is provided with a locking mechanism, which is used to lock and fix the first semi-ring block and the second semi-ring block when they are assembled to prevent them from separating under force.

[0022] As a preferred example, the end face of the fixed ring is provided with an annular slide rail; the annular slide rail mechanism includes:

[0023] Multiple pulleys are arranged to roll within a chute track;

[0024] Multiple connecting shafts, each corresponding to a pulley, have one end connected to the pulley and the other end connected to the rotary gear ring.

[0025] As a preferred example, the drive mechanism includes:

[0026] Servo motor two is connected to the first semi-ring block;

[0027] The transmission gear meshes with the output shaft and rotary gear ring of the servo motor II.

[0028] As a preferred example, a brake is provided on the second half-ring block for fixing the first half-gear ring or the second half-gear ring on the separated second half-ring block.

[0029] As a preferred example, two clamps are provided on both the first half gear ring and the second half gear ring, and the four clamps on the rotary gear ring are distributed at equal angles.

[0030] The fixture includes:

[0031] A fixed plate, which is connected to the rotary gear ring;

[0032] The power mechanism is connected to the fixed plate, and the output end moves in a linear motion.

[0033] The shoe-shaped gripper is connected to the output end of the power mechanism to move linearly along the diameter of the rotary gear ring.

[0034] As a preferred example, the fixture also includes a photoelectric sensor connected to the fixed plate for detecting changes in the position of the hoof-shaped grippers.

[0035] The beneficial effects of this invention are as follows:

[0036] 1. This invention controls the pitch angle of the oil pipe by using the height difference between two lifting devices, and the two lifting devices can be adjusted by translation to accommodate oil pipes of different sizes; in addition, the rotating clamping device can simultaneously fix the oil pipe and control its rotation angle, thereby enabling the oil pipe to be flexibly adjusted in all directions, improving the efficiency of oil pipe docking, maintenance and debugging.

[0037] 2. The rotating clamping device in this invention, through the splicing and separation design of two semi-ring blocks, enables the oil pipe to be rotated while clamping it, thereby facilitating the adjustment of the oil pipe angle, and maintaining the fixation of the oil pipe during adjustment, thus improving the safety during operation. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0039] Figure 1 A schematic diagram of an adjustable lifting clamping device for offshore oil pipes;

[0040] Figure 2 This is a schematic diagram of the rotating clamping device;

[0041] Figure 3 This is a schematic diagram of the structure of the first semi-ring block;

[0042] Figure 4 A schematic diagram showing the structure in which the pulley and connecting shaft are installed on the first semi-ring block;

[0043] Figure 5 This is a schematic diagram of the fixture's structure;

[0044] Figure 6 This is a schematic diagram of the drive mechanism;

[0045] Figure 7 This is a schematic diagram of the structure of one of the support bases in the auxiliary support device;

[0046] Figure 8 This is a schematic diagram of the brake.

[0047] In the diagram: Base 1, Lifting device 2;

[0048] Rotary clamping device 3, first bracket 31, second bracket 32, first half-ring block 33, second half-ring block 34, clamp 35, fixing plate 351, power mechanism 352, shoe cleaver 353, photoelectric sensor 354, drive mechanism 36, servo motor 37, second half-gear ring 38, first half-gear ring 39;

[0049] Auxiliary support device 4, support base 41, roller 42;

[0050] 5. Locking mechanism; 6. Pulley; 7. Connecting shaft; 8. Slide rail; 9. Protective cover;

[0051] Brake 10, electromagnetic brake 101, driven gear 102. Detailed Implementation

[0052] 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.

[0053] It should be noted that when a component is said to be "installed on" another component, it can be directly on the other component or it may be in a component that is centered on it. When a component is said to be "set on" another component, it can be directly set on the other component or it may also be in a component that is centered on it. When a component is said to be "fixed to" another component, it can be directly fixed to the other component or it may also be in a component that is centered on it.

[0054] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0056] Please refer to Figure 1 This embodiment provides an adjustable lifting and clamping device for offshore oil pipes, which includes a base 1 and two adjustable lifting and clamping units arranged opposite each other. If the length direction of the base 1 is defined as the Y direction, the two adjustable lifting and clamping units are arranged opposite each other on the base 1 along the Y direction and can move along the Y direction on the base 1, that is, the distance between the two adjustable lifting and clamping units is adjustable.

[0057] Specifically, taking an adjustable lifting clamping unit as an example, this adjustable lifting clamping unit includes a lifting device 2, a rotating clamping device 3, an auxiliary support device 4, and a brake 10. The lifting device 2 can be a scissor lift, whose height is adjusted by hydraulically controlling the angle of the connecting rod. A translation mechanism at the bottom of the lifting device 2 enables it to move along the Y-direction. Both ends of the hydraulic pipe are fixed by two adjustable lifting clamping units, thus controlling the lifting height of the two lifting devices 2 to create a height difference controls the tilt angle at both ends of the hydraulic pipe. This tilt angle is the angle between the length of the hydraulic pipe and the horizontal plane, commonly referred to as the pitch angle.

[0058] The following is a description of the rotating clamping device 3:

[0059] Please refer to Figure 2The rotating clamping device 3 is used to fix the oil pipe and drive it to rotate. It includes a first support 31, a second support 32, a first semi-ring block 33, a second semi-ring block 34, a first semi-gear ring 39, a second semi-gear ring 38, multiple clamps 35, and a drive mechanism 36. The X direction is defined as the direction perpendicular to the Y direction on the horizontal plane. The first support 31 and the second support 32 move in the X direction at the top of the lifting device 2 via a translation mechanism, adjusting the distance between them. Servo motors 37 are fixed to both the first support 31 and the second support 32. The output shafts of both servo motors 37 are arranged along the X direction and face each other. The outer wall of the first semi-ring block 33 (the outwardly protruding side of the arc-shaped first semi-ring block 33) is connected to the output shaft of one of the servo motors 37. The outer wall of the second semi-ring block 34 is connected to the output shaft of the other servo motor 37. The servo motor 37 serves several functions: First, it controls the rotation of the first and second semi-ring blocks 33 and 34, ensuring they are aligned at the same angle when joined. Second, based on its inherent characteristics, the servo motor 37 measures the rotation angle of the first and second semi-ring blocks 33 and 34, thus determining the pitch angle of the oil pipe. Third, the servo motor 37, equipped with a brake, brakes the shaft, preventing the first and second semi-ring blocks 33 and 34 from rotating arbitrarily due to external forces. It is important to note that after moving along the X-direction, the first and second semi-ring blocks 33 and 34 can assemble into a fixed ring, allowing this fixed ring to rotate between the first and second supports 31 and 32 along its X-direction symmetrical line. Similarly, the first and second semi-gear rings 39 and 38, moving along the X-direction, can also assemble into a complete, annular rotary gear ring. The formed rotary gear ring is coaxial with the fixed ring, and they rotate relative to each other via an annular slide rail mechanism. Specifically, such as Figure 3 and Figure 4 As shown, a sliding track 8 is provided on the end face (the end face is perpendicular to the axis of the fixed ring) of both the first semi-ring block 33 and the second semi-ring block 34. When the first semi-ring block 33 and the second semi-ring block 34 are assembled, the sliding tracks 8 on both sides can form a complete, annular sliding track 8. The annular sliding track mechanism includes multiple pulleys 6 and multiple connecting shafts 7 corresponding to the multiple pulleys 6. The multiple pulleys 6 are all rolled within the sliding track 8. One end of the connecting shaft 7 is connected to the pulley 6, and the other end is connected to the rotary gear ring, ultimately enabling the entire rotary gear ring to connect with the fixed ring and rotate coaxially. This connection design can effectively reduce the friction between the fixed ring and the rotary gear ring and is easy to assemble and disassemble. Alternatively, a sliding track 8 can be provided on the end face of the rotary gear ring, and one end of the connecting shaft 7 can be connected to the rotary gear ring, achieving the same effect.

[0060] It should also be noted that when the first half-ring block 33 and the second half-ring block 34 separate, the angles of the first half-gear ring 39 and the first half-ring block 33, and the angles of the second half-gear ring 38 and the second half-ring block 34, must be controlled to correspond. That is, the dividing line on the fixed ring and the dividing line on the rotating gear ring must coincide to prevent the first half-gear ring 39 from straddling the first half-ring block 33 and the second half-ring block 34 and interfering with the separation of the fixed ring. Similarly, when the first half-ring block 33 and the second half-ring block 34 are assembled, their angles and the positions of the first half-gear ring 39 and the second half-gear ring 38 must also be matched.

[0061] For fixture 35, such as Figure 5 As shown, in this embodiment, two clamps 35 are provided on both the first half-gear ring 39 and the second half-gear ring 38, and a total of four clamps 35 on the rotary gear ring are distributed at equal angles. Each clamp 35 includes: a fixed plate 351, a power mechanism 352, a shoe-shaped gripper 353, and a photoelectric sensor 354. The fixed plate 351 is fixed to the rotary gear ring. The power mechanism 352 is connected to the fixed plate 351. In this embodiment, the power mechanism 352 includes a stepper motor, a transmission belt, a lead screw, a screw hole plate, a guide rod, a limiting plate, and a spring. The limiting plate is fixed to the fixed plate 351. The guide rod passes through the limiting plate and is slidably connected to it. One end of the guide rod is fixed to the shoe-shaped gripper 353, and the other end is fixed to the screw hole plate. One end of the lead screw is rotatably connected to the fixed plate 351, and the other end is threadedly connected to the screw hole plate. A stepper motor is fixed to a mounting plate 351 and arranged parallel to the length of the lead screw. A transmission belt connects the output shaft of the stepper motor to the lead screw, allowing for both transmission requirements and reduced space requirements. The rotation of the lead screw driven by the stepper motor enables the linear movement of the guide rod, thereby actuating the extension and retraction of the shoe clamps 353. Springs are fitted onto the guide rod, with their ends abutting against the limiting plate and the screw hole plate, providing a buffering effect to prevent severe impacts and sudden force changes. The shoe clamps 353 move linearly under the drive of the guide rod, along the diameter of the rotary gear ring, ensuring stable clamping and fixing of the oil pipe by the four shoe clamps 353. The selection of shoe clamps 353 increases the contact area with the oil pipe. A rubber layer is installed on the shoe clamps 353 to reduce hard impacts when clamping the oil pipe, providing protection. The photoelectric sensor 354 is also fixed on the fixed plate 351. By detecting the change in distance between the shoe clamp 353 and the photoelectric sensor 354, the position change of the shoe clamp 353 can be detected, so that the operator can control and adjust the oil pipe clamping in a timely manner.

[0062] For the drive mechanism 36, it is used to rotate the gear ring on the fixed ring to drive the angle change of the oil pipe. In this embodiment, as... Figure 6As shown, the drive mechanism 36 includes a second servo motor and a transmission gear. The second servo motor is fixed on the first semi-ring block 33, and its output shaft meshes with the transmission gear, which in turn meshes with a rotary gear ring. This allows the second servo motor to drive the rotary gear ring to rotate, thereby rotating the clamped and fixed oil pipe. The second servo motor also has the function of measuring the rotation angle. Of course, the drive mechanism 36 is not limited to this; it only needs to be able to drive the rotary gear ring to rotate.

[0063] The following is a description of the auxiliary support device 4:

[0064] The auxiliary support device 4 is also located on top of the lifting device 2, and is used to support the oil pipe before it is fixed. For example... Figure 7 As shown, the auxiliary support device 4 includes two support seats 41 and two rollers 42. The two support seats 41 are also slidably mounted on top of the lifting device 2 along the X-direction via a translation mechanism, parallel to the fixed ring and spaced close together. The rollers 42 can be made of rubber. The two rollers 42 are connected to the top of the two support seats 41 via bearing seats. The distance between the two support seats 41 is adjusted by moving them, and the oil pipe is placed on the two rollers 42 to facilitate adjustment of the oil pipe's placement height. When the first half-ring block 33 and the second half-ring block 34 are not assembled into a fixed ring, the two support seats 41 move towards the center to support the oil pipe. When the first half-ring block 33 and the second half-ring block 34 are assembled into a fixed ring, and the shoe clamp 35 holds the oil pipe, the two support seats 41 spread out to both sides.

[0065] Regarding the brake 10, if the drive mechanism 36 is mounted on the first semi-ring block 33, then the brake 10 is mounted on the second semi-ring block 34. When the first semi-ring block 33 and the second semi-ring block 34 are separated, the drive mechanism 36 can fix the first half-gear ring 39 on the first semi-ring block 33, preventing it from slipping off. The second half-gear ring 38 on the second semi-ring block 34 needs to be fixed by the brake 10. In this embodiment, as... Figure 8 As shown, the brake 10 includes an electromagnetic brake 101 and a driven gear 102. The electromagnetic brake 101 is fixed on the second half-ring block 34, and its output shaft is driven by the driven gear 102 meshing with the second half-gear ring 38. When the rotating gear ring rotates, the electromagnetic brake 101 is energized and does not brake, and the driven gear 102 rotates with the rotating gear ring. When the first half-ring block 33 and the second half-ring block 34 separate, the electromagnetic brake 101 is de-energized and brakes, the driven gear 102 will not rotate, and thus the second half-gear ring 38 will be stationary, preventing it from slipping.

[0066] Furthermore, a locking mechanism 5 is provided on the first semi-ring block 33, which is used to lock and fix the first semi-ring block 33 and the second semi-ring block 34 when they are assembled, preventing them from separating under force. For example, a tenon and mortise structure is set on the contact surface of the first semi-ring block 33 and the second semi-ring block 34. The locking mechanism 5 set at the tenon and mortise joint can be an electromagnet-controlled pin. When the first semi-ring block 33 and the second semi-ring block 34 are assembled, the electromagnet is de-energized, causing the pin to pop out and insert into the lock hole at the tenon and mortise joint, preventing them from separating under force. When the first semi-ring block 33 and the second semi-ring block 34 need to be separated, the electromagnet is energized, causing the pin to retract. In addition, a corresponding protective cover 9 can be provided around the first semi-ring block 33 and the second semi-ring block 34. The protective cover 9 consists of two semi-circular parts, which are fixed on the first semi-ring block 33 and the second semi-ring block 34 and move with them. The gear ring is enclosed by the protective cover 9, providing a certain degree of protection. A cable chain can be installed inside the cover 9, supplying power to the clamp 35 via a cable within the chain, preventing power outages due to cable entanglement or damage during rotation. Additionally, a brake 10 can be installed at the output shaft of the servo motor 37 to prevent insufficient braking force and further improve stability. The aforementioned translation mechanism can be selected according to needs, such as linear guides, hydraulic cylinders, or motor-driven rack and pinion mechanisms; no further restrictions are imposed here.

[0067] The working principle of this invention is as follows: When it is necessary to fix the oil pipe, the first half-ring block 33 and the second half-ring block 34 are initially in a separated state. The auxiliary support device 4 moves to a position between the first half-ring block 33 and the second half-ring block 34. Then, the oil pipe is hoisted and placed on the auxiliary support device 4. After the oil pipe is stably placed on the auxiliary support device 4, the first half-ring block 33 and the second half-ring block 34 are assembled into a fixing ring, and the fixing ring fits the oil pipe within it. Then, the clamps 35 are driven so that multiple clamps 35 hold the oil pipe. At this time, the rotary gear ring rotates 360° or ±180° under the drive of the drive mechanism 36. At the same time, the drive mechanism 36 can detect the rotation angle of the rotary gear ring, thereby driving the oil pipe to rotate for angle adjustment. The pitch angle adjustment of the oil pipe is controlled by the height of the two lifting devices 2. When the two lifting devices 2 are at the same height, the oil pipe is in a horizontal state. When there is a height difference between the two lifting devices 2, the oil pipe will generate a pitch angle accordingly. When the oil pipe pitches, servo motor 37 measures the corresponding pitch angle change and transmits the signal to the corresponding host computer. When the oil pipe needs to be removed, the auxiliary support device 4 first supports the oil pipe, then the clamp 35 releases in sequence, and the first half-ring block 33 and the second half-ring block 34 separate. At this time, the oil pipe can be hoisted and removed.

[0068] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An adjustable lifting and clamping device for offshore oil pipes, characterized in that, It includes two adjustable lifting clamping units arranged opposite each other; each adjustable lifting clamping unit includes: Lifting device (2) is used to adjust the height to form a height difference between the two lifting devices (2), and the tilt angle at both ends of the oil pipe is controlled by the height difference; A rotating clamping device (3), located on top of the lifting device (2), is used to fix the oil pipe and drive it to rotate; and An auxiliary support device (4) is installed on top of the lifting device (2) and is used to support the oil pipe before fixing it. The rotating clamping device (3) includes: The first bracket (31) and the second bracket (32) are slidably disposed on the top of the lifting device (2) along the X direction; The first semi-ring block (33) is rotatably connected to the first bracket (31) in the X direction; The second half-ring block (34) is rotatably connected to the second bracket (32) along the X direction, and the second half-ring block (34) and the first half-ring block (33) can be combined into a fixed ring by moving along the X direction; The first half-gear ring (39) and the second half-gear ring (38) can be combined into a rotary gear ring by moving along the X direction; the rotary gear ring and the fixed ring are coaxially arranged; the rotary gear ring and the fixed ring rotate relative to each other through a ring slide rail mechanism; Multiple clamps (35) are mounted on the rotary gear ring; the multiple clamps (35) are used to clamp and fix the oil pipe located within the rotary gear ring; and Drive mechanism (36) is used to drive the rotary gear ring to rotate on the fixed ring.

2. The adjustable lifting and clamping device for offshore oil pipes according to claim 1, characterized in that, Both lifting devices (2) are scissor lift mechanisms; Both lifting devices (2) move along the Y direction.

3. The adjustable lifting and clamping device for offshore oil pipes according to claim 1, characterized in that, The auxiliary support device (4) includes: Two support seats (41) are slidably disposed on top of the lifting device (2) along the X direction; Two rollers (42) are respectively mounted on two support seats (41); the two rollers (42) are used to support the oil pipe when they are close together.

4. The adjustable lifting and clamping device for offshore oil pipes according to claim 1, characterized in that, Both the first bracket (31) and the second bracket (32) are equipped with servo motors (37). One of the servo motors (37) is used to drive the first semi-ring block (33) to rotate along the X direction on the first bracket (31), and the other servo motor (37) is used to drive the second semi-ring block (34) to rotate along the X direction on the second bracket (32).

5. The adjustable lifting clamping device for offshore tubing according to claim 1, characterized in that, The first semi-ring block (33) is provided with a locking mechanism (5), which is used to lock and fix the first semi-ring block (33) and the second semi-ring block (34) when they are assembled, so as to prevent them from separating under force.

6. The adjustable lifting and clamping device for offshore tubing according to claim 1, characterized in that, The end face of the fixed ring is provided with an annular slide rail (8); the annular slide rail mechanism includes: Multiple pulleys (6) are rolled within a chute track (8); Multiple connecting shafts (7) correspond one-to-one with the pulley (6), with one end connected to the pulley (6) and the other end connected to the rotary gear ring.

7. The adjustable lifting clamping device for offshore tubing according to claim 1, characterized in that, The drive mechanism (36) includes: Servo motor 2 is connected to the first semi-ring block (33); The transmission gear meshes with the output shaft and rotary gear ring of the servo motor II.

8. The adjustable lifting clamping device for offshore tubing according to claim 7, characterized in that, A brake (10) is provided on the second half ring block (34), which is used to fix the first half gear ring (39) or the second half gear ring (38) on the separated second half ring block (34).

9. The adjustable lifting clamping device for offshore oil pipes according to claim 1, characterized in that, Two clamps (35) are provided on the first half gear ring (39) and the second half gear ring (38), and the four clamps (35) on the rotary gear ring are distributed at equal angles; The fixture (35) includes: A fixed plate (351) is connected to the rotary gear ring; The power mechanism (352) is connected to the fixed plate (351), and the output end moves in a linear motion; The shoe chuck (353) is connected to the output end of the power mechanism (352) to move linearly along the diameter of the rotary gear ring.

10. The adjustable lifting and clamping device for offshore tubing according to claim 9, characterized in that, The clamp (35) also includes a photoelectric sensor (354) connected to the fixed plate (351) for detecting positional changes of the hoof clamping claw (353).

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