Oil pipe grabbing and moving device and oil pipe preparation method

Abstract

The invention discloses an oil pipe grabbing and moving device and an oil pipe preparation method, and mainly relates to the field of oil pipe conveying. Comprising a connecting module extending linearly, end modules are arranged at the two ends of the connecting module respectively, each end module comprises a machine shell, a grabbing mechanism is arranged at the end, close to the length direction of the machine shell, of each machine shell, each grabbing mechanism comprises a picking claw, one end of each picking claw is rotationally connected with the corresponding machine shell, and each picking claw is of a V-shaped structure bent downwards; a plurality of walking wheels are rotatably installed at the bottom of the machine shell in the length direction of the machine shell, the walking wheels are arranged side by side in the length direction of the machine shell, the axial direction of the walking wheels is perpendicular to the length direction of the machine shell, trapezoidal grooves matched with the surface of an oil pipe are formed in the circumferential faces of the walking wheels, and one or more walking wheels are driven by a motor. The oil pipe grabbing and conveying device has the beneficial effects that oil pipes can be grabbed and conveyed in combination with arrangement of pipe rows, the structure is simple, independent operation can be achieved, and the field adaptability is high.

Description

Technical Field

[0001] The invention relates to the field of oil pipe transportation, and in particular to an oil pipe grabbing and moving device and an oil pipe material preparation method. Background Art

[0002] Tubing is a core tool in well repair operations. Whether performing maintenance, repair, or renovation, it requires accurate movement from its storage location to the wellhead or other loading locations. Efficient tubing movement significantly improves operational efficiency and reduces delays caused by untimely tubing handling.

[0003] Moving oil pipes is not an easy task. First, they are typically heavy and long, covering a wide range of movement paths and making counterweights difficult to balance. Manual handling or manual assistance poses safety risks such as injuries from being hit by the pipe or slipping, and is labor-intensive and inefficient. Existing methods for moving oil pipes include cranes and loading systems integrated into automated catwalks.

[0004] Lifting equipment is expensive to use and operate, requiring specialized technicians. Its operating range is limited, requiring pre-arranged crane locations at the job site and consideration of clearance near oil wells. Operation is technically challenging, and moving pipes one by one is inaccurate and inefficient. Automated integrated loading equipment, such as catwalks, is complex and requires high site requirements. Transportation, installation, and maintenance are also costly, material preparation is time-consuming, and labor-intensive. The equipment requires the oil pipelines to be arranged in a coordinated manner. Furthermore, its highly integrated functionality allows it to only perform specific movement steps and must be integrated with the entire loading process, making its use very limited.

[0005] Therefore, at present, there is still no better means of moving oil pipelines on the ground flexibly and effectively, and the safety, efficiency, accuracy and cost are all unsatisfactory. Summary of the Invention

[0006] The purpose of the present invention is to provide an oil pipe grabbing and moving device and an oil pipe preparation method, which can grab and transport oil pipes in combination with the arrangement of pipe banks, has a simple structure, can operate independently, and has strong adaptability to on-site applications.

[0007] To achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions: A device for grabbing and moving an oil pipe comprises a connecting module extending in a straight line, with end modules provided at both ends of the connecting module, the end module comprising a casing, a grab mechanism being provided at one end of the casing close to its length direction, the grab mechanism comprising a picking claw rotatably connected to the casing at one end, the picking claw being a downwardly bent V-shaped structure, a plurality of walking wheels being rotatably mounted on the bottom of the casing along its length direction, the plurality of walking wheels being arranged in parallel along the length direction of the casing and the axial direction of the walking wheels being perpendicular to the length direction of the casing, the circumferential surface of the walking wheel being provided with a trapezoidal groove adapted to the surface of the oil pipe, and one or more walking wheels being driven based on a motor.

[0008] The bottom of the casing is provided with an open structure, and an arc-shaped notch is provided in the center of the bottom side of the front and rear end surfaces of the casing. The casing is rotatably mounted with a rotating shaft through a bearing near the front and rear end edges. The walking wheel is mounted on the rotating shaft, and a transmission gear is provided on one rotating shaft. A driving gear is also rotatably mounted in the casing. A stepping motor is provided in the casing, and the output shaft of the stepping motor is connected to the driving gear, and the driving gear is connected to the transmission gear.

[0009] The end face of the casing away from the grasping mechanism is the rear end face, a column is fixed on the rear end face, a crossbeam is fixed to the bottom end of the column, and light rods symmetrically arranged relative to the column are respectively provided on both sides of the crossbeam. The light rods extend vertically and auxiliary wheels are installed at the bottom ends. The auxiliary wheels are conical wheels that are narrow at the top and wide at the bottom. The circumference of the auxiliary wheels is used to contact the bottom circumference of the oil pipe that is ridden and walked on.

[0010] A mounting seat is fixed on the rear end surface, and lifting holes are passed through the upper and lower parts of the mounting seat. The column passes through the lifting hole and can be locked and limited relative to the mounting seat. The middle part of the beam is fixed to the bottom end of the column, and a seat sleeve is provided on the top of the light rod. The seat sleeve is sleeved on the beam and can be locked and limited with the beam.

[0011] The picking claw includes an integrally formed first rod and a second rod, one end of the first rod is connected to one end of the second rod at an obtuse angle, and one end of the first rod away from the second rod is arranged close to the housing and hingedly connected to the housing.

[0012] The grabbing mechanism also includes an articulated frame, a connecting rod, and a swing rod; The middle part of the picking claw is fixed with an upwardly protruding hinge position, there are two swing rods, which are symmetrically hinged on both sides of the shell, the front end of the connecting rod is hinged to the hinge position, and the rear end of the connecting rod is hinged to one end of the swing rod. The hinge frame includes a connecting rod, and the middle part of the connecting rod is fixed with a pull rod perpendicular to it. The connecting rod is arranged horizontally relative to the casing, and the two ends of the connecting rod are rotatably connected to the hinge of the connecting rod and the swing rod. A cylinder body is also provided in the casing, and the front end of the cylinder body is telescopically matched with a cylinder rod, and the front end of the cylinder rod is hingedly connected to the rear end of the pull rod. The casing is provided with a makeshift opening at the position corresponding to the cylinder body and the cylinder rod.

[0013] An articulated seat is provided on the inner end faces of the two casings that are opposite to each other. The connecting module includes a hollow beam that extends in a straight line and has a hollow structure. Both ends of the hollow beam are respectively provided with sliding sleeves extending in the same direction as the hollow beam. A telescopic rod is slidably fitted in the sliding sleeve, and the outer end of the telescopic rod is hingedly connected to the articulated seat with the axial direction being vertical.

[0014] The sliding sleeve is a circular tube and has a circular sliding cavity. The telescopic rod is cylindrical. The telescopic rod and the circular sliding cavity slide together in the axial direction and can rotate freely in the circumferential direction. The inner end of the telescopic rod is provided with a baffle. The baffle is larger than the cross-section of the circular sliding cavity. A gap is provided between the top side of the baffle and the top wall of the hollow beam, and a gap is provided between the two sides of the baffle and the inner wall of the hollow beam.

[0015] Batteries are installed in the hollow beam.

[0016] A method for preparing oil pipes, comprising the following steps: Pipeline preparation: Lay the oil pipes along one side of the workover vehicle and arrange them in multiple layers. Place 3-4 pipe spacers between each layer of pipe rows. The pipes used for spacing should be placed vertically with the pipes in the pipe rows. Oil pipe transportation: The end modules of the oil pipe grabbing mobile device are placed astride the two oil pipes exposed on the top layer for spacing, and the grabbing mechanism is set away from the direction of the workover vehicle. The oil pipe grabbing mobile device grabs the oil pipe layer by layer and transports it to the side of the workover vehicle.

[0017] Compared with the prior art, the beneficial effects of the present invention are: This device can straddle the oil pipes for movement, requiring minimal alignment. It can function even when the pipes are unevenly arranged, resolving adaptability issues in complex environments. The straddle-type design allows for stable movement and simple guidance, enabling quick and easy on-site movement constraints. This simple and lightweight structure achieves directional movement and handling, facilitating operation and maintenance while minimizing manual intervention. It can also operate independently, improving operational intensity and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the use state of the present invention.

[0019] Figure 2 It is a schematic diagram of the use state of the present invention.

[0020] Figure 3 It is a schematic diagram of the cooperation between the present invention and the oil pipe.

[0021] Figure 4 It is a schematic diagram of the component disassembly of the end module of the present invention.

[0022] Figure 5 This is a schematic diagram of the inner side view of the end module of the present invention.

[0023] Figure 6 It is a schematic diagram of the bottom structure of the end module of the present invention.

[0024] Figure 7 This is a diagram of the internal structure of the connection part between the end module and the connection module of the present invention.

[0025] Figure 8 It is a schematic diagram of the rear end face of the end module of the present invention.

[0026] Figure 9 It is a schematic diagram of the outer side view of the end module of the present invention.

[0027] Reference numerals shown in the accompanying drawings: 1. Casing; 2. Arc-shaped notch; 3. Rotating shaft; 4. Travel wheel; 5. Transmission gear; 6. Drive gear; 7. Mounting seat; 8. Lifting hole; 9. Column; 10. Crossbeam; 11. Seat cover; 12. Polished rod; 13. Auxiliary wheel; 14. Screw hole; 15. Pin hole; 16. Positioning hole; 17. Cylinder body; 18. Cylinder rod; 19. Yield opening; 20. Pickup claw; 21. Articulated position; 22. Swing rod; 23. Connecting rod; 24. Connecting rod; 25. Pull rod; 26. Articulated seat; 27. Hollow beam; 28. Sliding sleeve; 29. ​​Telescopic rod; 30. Baffle. DETAILED DESCRIPTION

[0028] Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiments are only used to illustrate the present invention and are not used in limiting the scope of the present invention.In addition, should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the application equally.

[0029] Example 1:

[0030] As a near-ground self-propelled device, this device has a new design that allows it to be highly adaptable to on-site production conditions of oil wells and to efficiently operate the grabbing and moving of oil pipes.

[0031] A single oil pipe is typically 9 to 12 meters long. Therefore, during workover operations, large numbers of pipes are often stacked side by side in rows, either single-layer or multi-layer. Multi-layer stacking is typically stacked 3 to 5 layers high, primarily to save space. This is a common practice for oil pipes on worksites. In this situation, when moving the pipes, we need to consider the common multi-layer layout scenario and the considerable space occupied by the stacked pipes, which poses challenges to both equipment movement and pipe handling.

[0032] The device makes full use of the characteristics of the oil pipe row and guides the oil pipe during movement. The main structure includes a connecting module, and the two ends of the connecting module are respectively provided with end modules.

[0033] (1) End module The end module includes a housing 1, which is used to provide a mounting position for components and protect internal transmission components.

[0034] The bottom of the casing 1 is provided with an open structure to facilitate straddling with the oil pipe below. The two ends of the casing 1 along its length are defined as the front end face and the rear end face respectively. An arc-shaped notch 2 is provided in the center of the bottom side of the front and rear end faces of the casing 1 to facilitate making way for the oil pipe.

[0035] The housing 1 is rotatably mounted with a shaft 3 near the front and rear ends of the housing 1 through bearings. Two running wheels 4 are mounted on the two shafts 3 respectively. The running wheels 4 are provided with a trapezoidal groove along their circumference. The trapezoidal groove is a circumferential annular groove with an isosceles trapezoidal cross-section. The inclined groove walls on both sides of the trapezoidal groove are used to contact the circumference of the oil pipe to achieve stable straddling walking. A transmission gear 5 located in the housing 1 is also fixed to one of the shafts 3 through a key connection. A drive gear 6 is also rotatably mounted in the housing 1. The drive gear 6 and the transmission gear 5 are connected in transmission. The specific connection method can be achieved through chain, toothed belt or gear meshing. The chain is wound around the drive gear 6 and the transmission gear 5 in a circular shape. A stepper motor is provided in the housing 1. The output shaft of the stepper motor is connected to the gear shaft of the drive gear 6 through a reducer to achieve rotational drive of the drive gear 6, thereby driving the end module to move.

[0036] The transmission gear 5 is preferably installed on the rotating shaft 3 close to the front end surface to achieve a better driving effect.

[0037] A mounting base 7 is provided on the rear end face of the casing 1. The mounting base 7 can be fixed by fixing parts such as bolts or by welding. The mounting base 7 adopts a T-shaped structure, which has greater contact with the rear end face and is reliably fixed. A lifting hole 8 is passed through the upper and lower parts of the mounting base 7. A column 9 is passed through and slides up and down in the lifting hole 8. A crossbeam 10 is fixed to the bottom end of the column 9. The center of the crossbeam 10 is fixed to the bottom end of the column 9, so that the column 9 and the crossbeam 10 form a "⊥"-shaped structure. The crossbeam 10 is provided with a seat cover 11 which can slide relative to the crossbeam and adjust its position. A light rod 12 extending vertically downward is fixed to the bottom surface of the seat cover 11. The bottom end of the light rod 12 is provided with an auxiliary wheel 13. The auxiliary wheel 13 is rotatably connected to the bottom end of the light rod 12. The auxiliary wheel 13 is a conical wheel that is narrow at the top and wide at the bottom. There are two auxiliary wheels 13 that are symmetrically arranged relative to the column 9. The inclined circumference of the auxiliary wheel 13 is used to contact the bottom circumference of the oil pipe that is ridden and walked, clamp the oil pipe and rotate with the movement, realize auxiliary guidance at the tail, and play an important stabilizing role in preventing tipping when the front end grabber holds up the oil pipe.

[0038] In terms of installation, a structure that is easily disassembled and adjustable is adopted. A screw hole 14 is provided on the top surface of the seat cover 11. A positioning bolt is connected to the internal thread of the screw hole 14. The bottom end of the positioning bolt is used to abut against the upper surface of the crossbeam 10 to adjust and fix the spacing between the two auxiliary wheels 13. Pin holes 15 are equidistantly provided on the column 9 along its height direction. A positioning hole 16 that communicates with the lifting hole 8 is provided transversely on the mounting seat 7. The inner wall of the positioning hole 16 can be smooth or provided with an internal thread. A pin is movably inserted or threaded into the positioning hole 16. The pin is a screw structure or a pin structure. The pin is movably inserted into the pin hole 15 to determine the relative height of the column 9, thereby adjusting the height of the two auxiliary wheels 13. The above structure not only facilitates the adjustment of the auxiliary clamping effect of the auxiliary wheel 13, but also facilitates disassembly and replacement of components.

[0039] Through the walking structure of the above-mentioned end module, it is possible to walk astride along the oil pipe, and using two oil pipes (2 sets of end modules) as auxiliary, it is convenient to constrain and guide the walking of the end module. Therefore, on site, rapid constraint and guidance can be achieved simply by placing two oil pipes on the pipe row. The walking structure does not require complex identification and structure, has strong adaptability to the site, and can be controlled to a very low cost.

[0040] A cylinder body 17 is provided in the casing 1 near the rear end surface. The cylinder body 17 can be an air cylinder, an oil cylinder, or an electric cylinder.

[0041] The front end of the cylinder body 17 is telescopically fitted with a cylinder rod 18 .

[0042] The cylinder body 17 is installed above the running wheel 4, and the housing 1 is provided with a clearance opening 19 at the position corresponding to the cylinder body 17 and the cylinder rod 18, so that the cylinder rod 18 can pass through the clearance opening 19 and extend out of the housing 1.

[0043] A grabbing mechanism is provided at the front end of the housing 1 (the end away from the auxiliary wheel 13 ), and the grabbing mechanism includes: an articulated frame, a connecting rod 23 , a swinging rod 22 , and a picking claw 20 .

[0044] The front end surface of the housing 1 adopts a wedge-shaped structure to facilitate the swinging movement of the above components.

[0045] Pickup claws 20 are symmetrically positioned on either side of the front end of the housing 1, away from the mounting base 7. These claws 20 comprise an integrally formed first and second rods, with the front end of the first rod and the rear end of the second rod connected at an obtuse angle, forming an upward-opening V-shaped lifting structure. The swinging motion of the claws 20 allows them to both downwardly pick up and upwardly lift the oil pipe.

[0046] The rear end of the first rod can be rotatably connected to the rotating shaft 3 at the front end, and the integrated installation saves components.

[0047] There are two swing rods 22 symmetrically hinged on both sides of the housing. The swing rods 22 are arc-shaped rods and one end of each swing rod is rotatably mounted on both sides of the housing 1 behind the picking claw 20 .

[0048] An upwardly extending hinge position 21 is provided in the middle of the first rod, the front end of the connecting rod 23 is hinged to the hinge position 21, and the rear end of the connecting rod 23 is hinged to one end of the swing rod 22 to achieve linkage coordination between the swing rod 22 and the picking claw 20.

[0049] The articulated frame includes a connecting rod 24, and both ends of the connecting rod 24 are respectively provided with articulated shafts. The rear end of the connecting rod 23 is hinged on the articulated shaft, and the end of the swing rod 22 is also hinged on the articulated shaft, so that the articulated position of the connecting rod 23 and the swing rod 22 is constrained at both ends of the connecting rod 24. A pull rod 25 is fixed to the middle part of the connecting rod 24, and the rear end of the pull rod 25 is hinged to the front end of the cylinder rod 18 to realize the drive control of the entire grasping mechanism.

[0050] Through the above structure, when the cylinder rod 18 is extended, the articulated frame is pushed forward, and under the auxiliary constraint of the swing rod 22 and the transmission linkage of the connecting rod 23, the picking claw 20 falls under the oil pipe. When the cylinder rod 18 is retracted, the articulated frame is pulled backward, and the picking claw 20 can be pulled upward to lift the oil pipe horizontally, completing the action of carrying the oil pipe.

[0051] Through the two end modules, the oil pipe can be lifted at two positions far away from each other. In response to the structural characteristics of the long oil pipe, the lifting is also stable, which facilitates the subsequent relocation of the oil pipe.

[0052] In order to facilitate connection with the connection module, hinge seats 26 are provided on the opposite inner end surfaces of the two housings 1.

[0053] (2) Connection module It includes a hollow beam 27 that extends in a straight line and has a hollow structure. In this example, the hollow beam 27 is a hollow structure with a rectangular cross-section, which is easy to process and add reinforcing ribs.

[0054] Batteries can be installed inside the hollow beam 27 due to its hollow position to provide energy for the power structures at both ends.

[0055] A sliding sleeve 28 is provided at each end of the hollow beam 27. The sliding sleeve 28 is a circular sleeve and is fixed centrally in the hollow beam 27. In order to improve the supporting strength, connecting ribs are provided between the circumference of the sliding sleeve 28 and the inner walls at both ends of the hollow beam 27 to fix the sliding sleeve 28 and increase the strength.

[0056] A telescopic rod 29 is slidably fitted in the sliding sleeve 28 , and the telescopic rod 29 cooperates with the sliding sleeve 28 to achieve a telescopic margin adjustment capability relative to both ends of the hollow beam 27 .

[0057] The inner end of the telescopic rod 29 is provided with a baffle 30 . The baffle 30 is larger than the inner diameter of the sliding sleeve 28 , so as to limit the inner end of the telescopic rod 29 .

[0058] The telescopic rod 29 is a circular rod, and the sliding sleeve 28 also has a circular sliding cavity. This allows the telescopic rod 29 to rotate circumferentially through a certain angle as it slides and retracts axially along the sliding sleeve 28. However, to prevent excessive rotation, the baffle 30 is a rectangular plate, with its upper side close to the inner wall of the hollow beam 27. A gap a is defined between the top side of the baffle 30 and the top wall of the hollow beam 27, and a gap b is defined between the sides of the baffle 30 and the inner wall of the hollow beam 27. When the relative rotation of the telescopic rod 29 and the hollow beam 27 exceeds a certain angle, the top side of the baffle 30 will contact the inner wall of the hollow beam 27. This limit angle is limited to no more than 20 degrees in one direction, ensuring that the telescopic rod 29 rotates within a reasonable range and avoiding instability caused by excessive rotation. This structure enables the end modules at both ends to swing up and down automatically, thereby adapting to adverse walking conditions.

[0059] The outer end of the telescopic rod 29 is hingedly connected to the hinge seat 26 of the end module with the axial direction being the vertical direction, so that the end module can have the ability to independently swing back and forth and self-adjust in the horizontal direction.

[0060] Based on the structural characteristics of the connection parts of the end modules and the connecting modules, the end modules are connected through the connecting modules to form a complete device structure. At the same time, the end modules at both ends have the ability to independently adjust themselves. Its adaptive walking ability is reflected in the following aspects during specific walking: When in use, it is only necessary to place two oil pipes on the ground or on a pipe bank, and by placing the end module astride the two oil pipes, the device can be guided to move in a straight line.

[0061] During the walking process, the two end modules have the function of up and down swing adjustment respectively, which can be adaptively adjusted according to the ups and downs and unevenness of the oil pipeline or the ground. They have the function of front and back swing adjustment and telescopic function, which can adapt to the crooked placement of the oil pipeline and can achieve adaptiveness along the direction of the oil pipeline without the need for precise placement.

[0062] In specific applications, we use the following methods for preparing and transporting oil pipes: After the pipe rows are unloaded from the truck, multiple layers of pipe rows are laid out layer by layer on the working side of the workover vehicle. The number of layers is 3-5. The length direction of each layer of pipe rows is arranged in the same direction as the front and rear direction of the workover vehicle. Adjacent layers of pipe rows are separated by 3-4 oil pipes. The oil pipes used for liner isolation between the pipe rows are placed perpendicular to the pipe row oil pipes. After the paving is completed, when the pipe row is prepared for transportation, this device is used to transport the pipe row layer by layer. The end module of this device is used to ride on the supporting oil pipes used to separate the top layer and the second layer. The device is started to move automatically, so that the picking claws of this device are moved away from the workover vehicle. The oil pipes away from the workover vehicle are picked up one by one and transported to the side of the workover vehicle, which is convenient for direct material collection during the workover vehicle operation.

[0063] After each pipe bank is delivered, the oil pipe used for separation is moved to the side of the pipe bank below and aligned with the oil pipe of the pipe bank below, and the device is moved to the oil pipe of the next layer. The specific moving method can be manual handling or any other known oil pipe moving method commonly used in the work site.

[0064] This example is not limited to the present one. The separated oil pipes can be directly moved away so as not to affect the transportation of each layer of pipe rows.

[0065] Since the pipes are placed on the pipe bridge at the site, the transportation of the bottom layer of the oil pipes can be completed in combination with the pipe bridge. That is, the device is placed on two bridges of appropriate width and moves through the cooperation with the pipe bridge.

Claims

1. A tubing grabbing and moving device, characterized in that: It includes a connecting module extending in a straight line, and end modules are respectively provided at both ends of the connecting module. The end module includes a casing, and a gripping mechanism is provided at one end of the casing near its length direction. The gripping mechanism includes a picking claw rotatably connected to the casing at one end, and the picking claw is a downwardly bent V-shaped structure. The bottom of the casing is rotatably mounted with multiple walking wheels along its length direction. The multiple walking wheels are arranged in parallel along the length direction of the casing and the axial direction of the walking wheels is perpendicular to the length direction of the casing. The circumference of the walking wheel is provided with a trapezoidal groove adapted to the surface of the oil pipe, and one or more walking wheels are driven by a motor.

2. The oil pipe grabbing and moving device according to claim 1, characterized in that: The bottom of the casing is provided with an open structure, and an arc-shaped notch is provided in the center of the bottom side of the front and rear end surfaces of the casing. The casing is rotatably mounted with a rotating shaft through a bearing near the front and rear end edges. The walking wheel is mounted on the rotating shaft, and a transmission gear is provided on one rotating shaft. A driving gear is also rotatably mounted in the casing. A stepping motor is provided in the casing, and the output shaft of the stepping motor is connected to the driving gear, and the driving gear is connected to the transmission gear.

3. The oil pipe grabbing and moving device according to claim 1, characterized in that: The end face of the casing away from the grasping mechanism is the rear end face, a column is fixed on the rear end face, a crossbeam is fixed to the bottom end of the column, and light rods symmetrically arranged relative to the column are respectively provided on both sides of the crossbeam. The light rods extend vertically and auxiliary wheels are installed at the bottom ends. The auxiliary wheels are conical wheels that are narrow at the top and wide at the bottom. The circumference of the auxiliary wheels is used to contact the bottom circumference of the oil pipe that is ridden and walked on.

4. The oil pipe grabbing and moving device according to claim 3, characterized in that: A mounting seat is fixed on the rear end surface, and lifting holes are passed through the upper and lower parts of the mounting seat. The column passes through the lifting hole and can be locked and limited relative to the mounting seat. The middle part of the beam is fixed to the bottom end of the column, and a seat sleeve is provided on the top of the light rod. The seat sleeve is sleeved on the beam and can be locked and limited with the beam.

5. The oil pipe grabbing and moving device according to claim 1, characterized in that: The picking claw includes an integrally formed first rod and a second rod, one end of the first rod is connected to one end of the second rod at an obtuse angle, and one end of the first rod away from the second rod is arranged close to the housing and hingedly connected to the housing.

6. The oil pipe grabbing and moving device according to claim 1, characterized in that: The grabbing mechanism also includes an articulated frame, a connecting rod, and a swing rod; The middle part of the picking claw is fixed with an upwardly protruding hinge position, there are two swing rods, which are symmetrically hinged on both sides of the shell, the front end of the connecting rod is hinged to the hinge position, and the rear end of the connecting rod is hinged to one end of the swing rod. The hinge frame includes a connecting rod, and the middle part of the connecting rod is fixed with a pull rod perpendicular to it. The connecting rod is arranged horizontally relative to the casing, and the two ends of the connecting rod are rotatably connected to the hinge of the connecting rod and the swing rod. A cylinder body is also provided in the casing, and the front end of the cylinder body is telescopically matched with a cylinder rod, and the front end of the cylinder rod is hingedly connected to the rear end of the pull rod. The casing is provided with a makeshift opening at the position corresponding to the cylinder body and the cylinder rod.

7. The oil pipe grabbing and moving device according to claim 1, characterized in that: An articulated seat is provided on the inner end faces of the two casings that are opposite to each other. The connecting module includes a hollow beam that extends in a straight line and has a hollow structure. Both ends of the hollow beam are respectively provided with sliding sleeves extending in the same direction as the hollow beam. A telescopic rod is slidably fitted in the sliding sleeve, and the outer end of the telescopic rod is hingedly connected to the articulated seat with the axial direction being vertical.

8. The oil pipe grabbing and moving device according to claim 7, characterized in that: The sliding sleeve is a circular tube and has a circular sliding cavity. The telescopic rod is cylindrical. The telescopic rod and the circular sliding cavity slide together in the axial direction and can rotate freely in the circumferential direction. The inner end of the telescopic rod is provided with a baffle. The baffle is larger than the cross-section of the circular sliding cavity. A gap is provided between the top side of the baffle and the top wall of the hollow beam, and a gap is provided between the two sides of the baffle and the inner wall of the hollow beam.

9. The oil pipe grabbing and moving device according to claim 7, characterized in that: Batteries are installed in the hollow beam.

10. A method for preparing oil pipes, characterized in that: The oil pipe grabbing and moving device according to any one of claims 1 to 9 is used, and includes the following steps: Pipeline preparation: Lay the oil pipes along one side of the workover vehicle and arrange them in multiple layers. Place 3-4 pipe spacers between each layer of pipe rows. The pipes used for spacing should be placed vertically with the pipes in the pipe rows. Oil pipe transportation: The end modules of the oil pipe grabbing mobile device are placed astride the two oil pipes exposed on the top layer for spacing, and the grabbing mechanism is set away from the direction of the workover vehicle. The oil pipe grabbing mobile device grabs the oil pipe layer by layer and transports it to the side of the workover vehicle.

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