A portable vehicle-mounted equipment for minor well repair and workover operations

Abstract

The present invention relates to a portable vehicle-mounted minor well repair and workover equipment, comprising a derrick mechanism, a hydraulic clamp mechanism that can be moved left and right on the derrick mechanism, a flippable work platform on the left side of the derrick mechanism, a detachable rotating table inside the work platform, a flange for connecting with a wellhead device on the rotating table, a group of first bolt holes on the rotating table, a group of second bolt holes corresponding to the first bolt holes on the work platform, the first bolt holes and the second bolt holes are provided with bolts for detachably setting the rotating table on the work platform, and a flange through hole adapted to the flange is also provided at the bottom of the work platform. The present invention can effectively solve the problem that the existing well repair and workover equipment is inconvenient to move and dismantle, needs to be equipped with a crane for lifting, and needs to dismantle and assemble liquid, gas and electricity pipelines during the transportation process, and cannot meet the requirements of existing minor repair operations.

Description

Technical Field

[0001] The invention relates to a portable vehicle-mounted minor repair and well-repair operation equipment. Background Art

[0002] At present, most workover rigs are mainly used for the lifting and lowering of equipment such as oil pipes. Other processes such as the lifting of oil pipes from pipe racks to elevators still need to be completed mainly by manual labor; there is an extremely inconvenient problem of wellhead centering.

[0003] At the same time, it is inconvenient to move and dismantle, and a crane is needed for lifting. In addition, the liquid, gas and electrical pipelines need to be dismantled during the transportation process, which cannot meet the requirements of existing minor repair operations. Summary of the invention

[0004] The purpose of the present invention is to provide a portable vehicle-mounted minor repair and well repair operation equipment to solve the problem that the existing well repair operation equipment is inconvenient to move and dismantle, requires a crane to lift, and during the transportation process, liquid, gas and electricity pipelines need to be disassembled and installed, and cannot meet the requirements of existing minor repair operations.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a portable on-vehicle minor well repair and workover equipment, including a derrick mechanism, a hydraulic clamp mechanism that can be moved left and right and arranged on the derrick mechanism, a flippable working platform is arranged on the left side of the derrick mechanism, a detachable rotating table is arranged in the working platform, and a flange for connecting with a wellhead device is arranged on the rotating platform; a group of first bolt holes are arranged on the rotating platform, and a group of second bolt holes corresponding to the first bolt holes are arranged on the working platform, and bolts for detachably setting the rotating platform on the working platform are arranged in the first bolt holes and the second bolt holes; a flange through hole adapted to the flange is also arranged at the bottom of the working platform; the aperture of the flange through hole is larger than the outer diameter of the flange, and an adjustment gap is arranged between the hole wall of the flange through hole and the outer side wall of the flange; a well support mechanism, a slip and a pipe string centering mechanism that can rotate with it are also arranged on the rotating platform; a drainage port is arranged at the bottom of the working platform; when on the vehicle, the rotating platform is fixed on the working platform by bolts, and when working, the bolts are removed, and the rotating platform is connected to the wellhead device through the flange through the flange through the flange through the flange through the hole.

[0006] Furthermore, the derrick mechanism includes a derrick seat, a derrick support is arranged on the derrick seat, a derrick platform is arranged on the derrick support, a derrick is arranged on the derrick platform, and a derrick inner cavity for accommodating a hydraulic clamp mechanism is formed in the middle of the derrick.

[0007] Furthermore, the hydraulic clamp mechanism includes a hydraulic clamp base arranged on the derrick platform, a liftable lifting support is arranged above the hydraulic clamp base, a lifting cylinder is arranged on the lifting support, the cylinder barrel of the lifting cylinder is fixed on the lifting support, and the top of the piston part of the lifting cylinder is hinged on the hydraulic clamp base; a connecting rod mechanism and a forward push cylinder for pushing the connecting rod mechanism to swing left and right are arranged on the front side wall of the lifting support; a clamp support plate which can move left and right with the connecting rod mechanism is arranged on the top side away from the lifting support; the cylinder barrel of the forward push cylinder is fixed on the front side wall of the lifting support, and its piston part is connected to the connecting rod mechanism; an adjustment plate is arranged on the clamp support plate; a gantry is arranged on the adjustment plate, and a group of support shafts are arranged through the top crossbeam of the gantry, the support shaft sleeve is provided with a support spring, a spring pressure plate is arranged on the upper part of the support shaft, and the support spring is arranged between the spring pressure plate and the top frame plate of the gantry; a hydraulic clamp is arranged at the bottom of the support shaft.

[0008] Furthermore, the connecting rod mechanism includes two connecting rods and two auxiliary rods. A connecting rod and an auxiliary rod are symmetrically arranged on the front and rear sides of the lifting support, and the connecting rod and the auxiliary rod on the same side of the lifting support are arranged in parallel; the bottoms of the connecting rod and the auxiliary rod are hinged on the lifting support, and the tops are connected to the clamp support plate; the piston part of the forward thrust cylinder is connected to the middle part of the connecting rod, which is used to push the connecting rod mechanism to move left and right.

[0009] Furthermore, a lifting guide rail is provided on the hydraulic pliers base, and the lifting support is provided with a first roller assembly adapted to the lifting guide rail. The first roller assembly includes a roller that can be lifted and lowered along the lifting guide rail, and a roller shaft fixedly connected to the lifting support is provided at the center of the roller.

[0010] Furthermore, it includes a well support seat for being set on the working platform, on which a reversible well support is hinged, on which a gripper for clamping the oil pipe column is provided, and on which a three-position cylinder is also provided, the cylinder barrel of the three-position cylinder is hinged on the well support seat, and the top of its piston part is connected to the well support.

[0011] Furthermore, the well support is a square frame, and its bottom frame is hinged on the well support seat; two three-position cylinders are provided, and the top ends of the piston parts of the two three-position cylinders are respectively hinged to the front and rear frames of the well support; the gripper is provided on the top frame of the well support.

[0012] Furthermore, the tubing centering mechanism includes a centering fixed seat, on which two groups of centering mechanisms are symmetrically arranged relative to the wellhead position, and each centering mechanism includes a side thrust cylinder, a rotating seat, a guide seat, a half-pipe positioning sleeve, an adjustment plate, and a side swing cylinder; the bottom of the rotating seat is hinged on the centering fixed seat; the bottom of the cylinder barrel of the side swing cylinder is hinged on the centering fixed seat, and its piston portion is hinged on the right side wall of the rotating seat; the guide seat is telescopically arranged on the top of the inner cavity of the rotating seat; the cylinder barrel of the side thrust cylinder is fixed on the left side wall of the rotating seat, and its piston portion is hinged on the left side wall of the guide seat; the adjustment plate is arranged on the top of the guide seat; the half-pipe positioning sleeve is arranged on the adjustment plate, which is used to clamp the oil tubing string; when the half-pipe positioning sleeves in the two groups of centering mechanisms are connected, they cooperate to clamp the oil tubing string.

[0013] Furthermore, the portable vehicle-mounted minor repair and well-repair operation equipment also includes a column, a transition plate, a flip cylinder, a lifting cylinder, a second roller assembly, and a valve; the structure of the second roller assembly is the same as the first roller assembly; the column is fixed on the derrick mechanism, and a guide groove is provided therein; the lifting cylinder is fixed to the bottom of the column, and the piston of the lifting cylinder is connected to the roller shaft of the second roller assembly; the roller of the second roller assembly can be lifted and lowered in the guide groove; the transition plate is arranged on the second roller assembly; the cylinder barrel of the flip cylinder and the working platform are hinged on the side wall of the transition plate, and the piston of the flip cylinder is connected to the bottom of the working platform to realize the flipping of the working platform; the valve is arranged on the discharge port of the working platform.

[0014] Furthermore, a liquid accumulation tank with a trapezoidal cross-section is formed in the working platform, and a bolt assembly cone protruding from the bottom surface is arranged at the center of the bottom of the liquid accumulation tank, and a flange through hole is formed in the center of the bolt assembly cone; the second bolt hole is arranged on the upper end surface of the bolt assembly cone; the rotating table is arranged in the liquid accumulation tank, which is higher than the liquid discharge port; the rotating table includes a transverse rotating frame, a longitudinal rotating frame, and a flange assembly hole, and the transverse rotating frame and the longitudinal rotating frame intersect each other perpendicularly at the flange assembly hole, two well support seats are symmetrically arranged on the frames at the front and rear ends of the transverse rotating frame, and two centering fixed seats are symmetrically arranged on the frames at the front and rear ends of the longitudinal rotating frame.

[0015] The beneficial effects of the present invention are as follows: the reversible working platform is convenient for transportation with a vehicle, and the space occupied is reduced. The rotating platform is provided with a well support mechanism, a slip and a pipe string centering mechanism that can rotate with it, and cooperates with the hydraulic clamp mechanism on the derrick mechanism. Through this portable vehicle-mounted minor repair and well repair operation equipment, all the required functions of the minor repair operation can be realized, without the need to use multiple separate equipment to do so, which reduces the workload and improves the work efficiency. The rotating platform is detachably fixed on the working platform by bolts. When the working platform needs to be flipped, it is fixed to the working platform with bolts; when the working platform is laid flat and the layout needs to be adjusted, the bolts are removed, and the rotating platform is hoisted and rotated to the required orientation; when the orientation is properly adjusted, the flange provided on the rotating platform is connected to the wellhead device, which is convenient for the next minor repair operation; the above-mentioned structural method makes the orientation adjustment of the rotating platform more convenient, and the transportation can be realized together with the working platform, which improves the portability of transportation. It effectively solves the problem that the existing equipment for small well repair and servicing operations is simple in structure and requires multiple separate equipment, such as separate pipe string centering, well support mechanism, hydraulic clamp mechanism, work platform, rotary table, and derrick mechanism, which are only integrated together on site during well repair operations, increasing workload and reducing work efficiency, while also causing the problem of extremely inconvenient transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 This is a structural schematic diagram in which the derrick mechanism and the hydraulic clamp mechanism are omitted in the present invention.

[0018] Figure 3 This is a side view of the structure of the present invention, in which the derrick mechanism and the hydraulic clamp mechanism are omitted.

[0019] Figure 4 This is a schematic diagram of the positional relationship between the rotating table and the working platform.

[0020] Figure 5 This is a structural diagram of the working platform.

[0021] Figure 6 It is a structural schematic diagram of the rotating table.

[0022] Figure 7 It is a structural schematic diagram of the well support mechanism.

[0023] Figure 8 It is a structural schematic diagram of the pipe string centering mechanism.

[0024] Fig. 9 It is a structural schematic diagram of the hydraulic clamp mechanism.

[0025] Fig.10 This is a schematic diagram of the structure of the hydraulic clamp mechanism from another angle.

[0026] Fig.11 It is a schematic diagram of the structure of the first roller assembly and the second roller assembly. DETAILED DESCRIPTION

[0027] Examples, such as Figures 1 to 11 The portable vehicle-mounted minor well repair and workover equipment shown in the figure comprises a derrick mechanism 1, a hydraulic clamp mechanism 2 which can be moved left and right and arranged on the derrick mechanism 1, a flippable working platform 3 is arranged on the left side of the derrick mechanism 1, a detachable rotating table 4 is arranged in the working platform 3, and a flange 5 for connecting with a wellhead device is arranged on the rotating table 4; a group of first bolt holes 6 are arranged on the rotating table 4, and a group of second bolt holes 7 which correspond to the first bolt holes 6 are arranged on the working platform 3, and bolts for detachably setting the rotating table 4 on the working platform 3 are arranged in the first bolt holes 6 and the second bolt holes 7; a flange through hole 8 which is adapted to the flange 5 is also arranged at the bottom of the working platform 3; the aperture of the flange through hole 8 is larger than the outer diameter of the flange 5, and an adjustment gap is arranged between the hole wall of the flange through hole 8 and the outer side wall of the flange 5; the rotating table 4 is also provided with a well support mechanism 9, a slip 10 and a pipe string centering mechanism 11 which can rotate with it; and a drainage port 12 is arranged at the bottom of the working platform 3.

[0028] When the vehicle is in use, the rotating platform 4 is fixed on the working platform 3 by bolts, so as to facilitate transportation. When working, the bolts are removed, and the rotating platform 4 is connected to the wellhead device through the flange 5 through the flange through-hole. Because of the existence of the adjustment gap, the position of the rotating platform 4 relative to the working platform 3 can be adjusted.

[0029] In the description of the present invention, it should be understood that the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the settings or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limitations on the present invention. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In addition, the term "including" and any variation thereof are intended to cover non-exclusive inclusions.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments. Unless the context clearly indicates otherwise, the singular forms "one", "one" and "item" used herein are also intended to include plural numbers. It should also be understood that the terms "include" and / or "comprise" used herein specify the existence of stated features, integers, steps, operations, units and / or components, without excluding the existence or addition of one or more other features, integers, steps, operations, units, components and / or combinations thereof.

[0032] The following combination Figures 1 to 11 The concept of the present invention is further explained.

[0033] A portable vehicle-mounted minor well repair and workover equipment comprises a derrick mechanism 1, a hydraulic clamp mechanism 2 which can be moved left and right on the derrick mechanism 1, a reversible working platform 3 is arranged on the left side of the derrick mechanism 1, a detachable rotating platform 4 is arranged in the working platform 3, and a flange 5 for connecting with a wellhead device is arranged on the rotating platform 4; a group of first bolt holes 6 are arranged on the rotating platform 4, and a group of second bolt holes 7 which correspond to the first bolt holes 6 are arranged on the working platform 3, and the first bolt holes 6 and the second bolt holes 7 are arranged for detachably setting the rotating platform 4 Bolts on the working platform 3; a flange through hole 8 adapted to the flange 5 is also provided at the bottom of the working platform 3; the aperture of the flange through hole 8 is larger than the outer diameter of the flange 5, and an adjustment gap is provided between the hole wall of the flange through hole 8 and the outer wall of the flange 5; the rotating table 4 is also provided with a well support mechanism 9, a slip 10 and a pipe column centering mechanism 11 that can rotate with it; a drain port 12 is provided at the bottom of the working platform 3; when on the vehicle, the rotating table 4 is fixed to the working platform 3 by bolts, and when working, the bolts are removed, and the rotating table 4 is connected to the wellhead device through the flange 5 and the flange through the flange through the hole 8.

[0034] The derrick mechanism 1 comprises a derrick seat 21 , on which a derrick support 22 is arranged, on which a derrick platform 23 is arranged, on which a derrick 24 is arranged, and a derrick inner cavity for accommodating the hydraulic clamp mechanism 2 is formed in the middle of the derrick.

[0035] The hydraulic clamp mechanism 2 includes a hydraulic clamp base 61 arranged on the derrick platform, a lift support 62 which can be raised and lowered is arranged above the hydraulic clamp base 61, a lifting cylinder 63 is arranged on the lifting support 62, the cylinder barrel of the lifting cylinder 63 is fixed on the lifting support 62, and the top of the piston of the lifting cylinder 63 is hinged on the hydraulic clamp base 61; a connecting rod mechanism and a forward push cylinder 64 for pushing the connecting rod mechanism to swing left and right are arranged on the front side wall of the lifting support 62; a clamp support plate 65 which can move left and right with the connecting rod mechanism is arranged on the top of the connecting rod mechanism away from the lifting support 62; the cylinder barrel of the forward push cylinder 64 is fixed on the front side wall of the lifting support 62, and its piston part is connected to the connecting rod mechanism; an adjustment plate 66 with adjustable fixed position is arranged on the clamp support plate 65, a group of waist-shaped grooves 603 for adjusting the fixed position are arranged on the adjustment plate 66, and a group of waist-shaped grooves are correspondingly arranged on the clamp support plate 65. The purpose of adjusting the position of the clamp support plate 65 is achieved by matching the waist-shaped grooves 603 at different positions on the adjustment plate 66 with the waist-shaped grooves 603 on the clamp support plate 65. A gantry 67 is provided on the adjustment plate 66, and a group of support shafts 68 are provided through the top crossbeam of the gantry 67. The support shafts 68 are sleeved with support springs 69. A spring pressure plate 601 is provided on the upper part of the support shaft 68. The support spring 69 is provided between the spring pressure plate 601 and the top frame plate of the gantry 67; a hydraulic clamp 602 is provided at the bottom of the support shaft 68.

[0036] The connecting rod mechanism includes two connecting rods 604 and two auxiliary rods 605. A connecting rod 604 and an auxiliary rod 605 are symmetrically arranged on the front and rear sides of the lifting support 62, and the connecting rods 604 and auxiliary rods 605 on the same side of the lifting support 62 are arranged in parallel; the bottoms of the connecting rods 604 and auxiliary rods 605 are hinged on the lifting support 62, and the tops are connected to the clamp support plate 65; the piston of the forward push cylinder 64 is connected to the middle of the connecting rod 604, which is used to push the connecting rod mechanism to move left and right. A connecting rod shaft 606 is arranged between the two connecting rods 604, and the piston of the forward push cylinder 64 is hinged to the end of the connecting rod shaft 606, which is used to push the connecting rod mechanism to move. An auxiliary rod shaft 607 is arranged between the two auxiliary rods 605.

[0037] The hydraulic pliers base 61 is also provided with a lifting rail 608, and the lifting support 62 is provided with a first roller assembly 609 adapted to the lifting rail 608. The first roller assembly 609 includes a roller 611 that can be lifted and lowered along the lifting rail 608, and a roller shaft 612 fixedly connected to the lifting support 62 is provided at the center of the roller 611. The first roller assembly 609 also includes a roller bearing 613, a pressure plate 614 and a spacer 615 arranged in the roller 611.

[0038] The well support mechanism 9 includes a well support seat for being set on the working platform 3, on which a reversible well support 31 is hinged, on which a gripper 32 for clamping the oil pipe column is provided, and on the well support seat there is also a three-position cylinder 33, the cylinder barrel of which is hinged on the well support seat, and the top of its piston part is connected to the well support 31.

[0039] The well support 31 is a square frame, and its bottom frame is hinged on the well support seat; two three-position cylinders 33 are provided, and the top ends of the piston parts of the two three-position cylinders 33 are respectively hinged to the front and rear frames of the well support 31; the gripper 32 is provided on the top frame of the well support 31.

[0040] The well support seat includes a well support seat vertical plate 34 and a well support seat bottom frame 35. The well support seat vertical plate 34 is vertically arranged on the well support seat bottom frame 35. The bottom frame of the well support 31 is hinged on the well support seat vertical plate 34. The cylinder barrels of the two three-position cylinders 3 are hinged on the well support seat bottom frame 35. The well support, the well support seat vertical plate 34 and the well support seat bottom frame 35 are provided with hinge ears 36 for hinge connection. The gripper 32 is detachably arranged on the top frame of the well support 31.

[0041] The tubing centering mechanism 11 includes a centering fixed seat 41, on which two sets of centering mechanisms are symmetrically arranged relative to the wellhead position, each centering mechanism includes a side thrust cylinder 42, a rotating seat 43, a guide seat 44, a half-pipe positioning sleeve 45, an adjustment plate 46, and a side swing cylinder 47; the bottom of the rotating seat 43 is hinged on the centering fixed seat 41; the bottom of the cylinder barrel of the side swing cylinder 7 is hinged on the centering fixed seat 41, and its piston part is hinged on the right side wall of the rotating seat 43; the guide seat 44 is telescopically arranged on the top of the inner cavity of the rotating seat 43; the cylinder barrel of the side thrust cylinder 42 is fixed on the left side wall of the rotating seat 43, and its piston part is hinged on the left side wall of the guide seat 44; the adjustment plate 46 is arranged on the top of the guide seat 44; the half-pipe positioning sleeve 45 is arranged on the adjustment plate 46, which is used to clamp the oil tubing; when the half-pipe positioning sleeves 45 in the two sets of centering mechanisms are docked, they cooperate to clamp the oil tubing. A right wall hinge ear 49 is provided on the right side wall of the rotating seat 43, a left wall hinge ear 48 is provided on the left side wall of the guide seat 44, the piston part of the side swing cylinder 7 is hinged to the right wall hinge ear 49, and the piston part of the side push cylinder 42 is hinged to the left wall hinge ear 48.

[0042] There can be one centering fixed seat 41 , or one centering fixed seat 41 corresponding to each set of pipe column centering mechanisms. The centering fixed seat 41 is located at the bottom left of the rotating seat 3 and a side swing limit plate 14 is provided.

[0043] The portable vehicle-mounted minor repair and well-repair operation equipment also includes a column 51, a transition plate 52, a turning cylinder 54, a lifting cylinder 55, a second roller assembly 501, and a valve 56; the structure of the second roller assembly 501 is the same as that of the first roller assembly 609; the column 51 is fixed on the derrick mechanism 1, and a guide groove 57 is arranged therein; the lifting cylinder 55 is fixed at the bottom of the column 51, and the piston of the lifting cylinder 55 is connected to the roller shaft 612 of the second roller assembly 501; the roller 611 of the second roller assembly 501 can be lifted and lowered in the guide groove 57; the transition plate 52 is arranged on the second roller assembly 501; the cylinder barrel of the turning cylinder 54 and the working platform 3 are hinged on the side wall of the transition plate 52, and the piston of the turning cylinder 54 is connected to the bottom of the working platform 3, so as to realize the turning of the working platform 3; the valve 56 is arranged on the discharge port 12 of the working platform 3.

[0044] A liquid accumulation groove 71 with a trapezoidal cross-section is formed in the working platform 3, and a bolt assembly circular platform 72 protruding from the bottom surface is arranged at the bottom center of the liquid accumulation groove 71, and a flange through hole 8 is formed at the center of the bolt assembly circular platform 72; the second bolt hole 7 is arranged on the upper end surface of the bolt assembly circular platform 72; the rotating table 4 is arranged in the liquid accumulation groove 71, which is higher than the drain port 12; the rotating table 4 includes a horizontal rotating frame 73, a longitudinal rotating frame 74, and a flange assembly hole 75, and the horizontal rotating frame 73 and the longitudinal rotating frame 74 intersect each other perpendicularly at the flange assembly hole 75, and two well support seats are symmetrically arranged on the frames at the front and rear ends of the horizontal rotating frame 73, and two centering fixed seats are symmetrically arranged on the frames at the front and rear ends of the longitudinal rotating frame 74.

[0045] The above embodiments are not considered from a limiting point of view, but from an illustrative point of view. The scope of the present invention is determined by the scope of the claims, not the description, and should be interpreted as all differences within the scope of equivalence are included in the present invention. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A portable vehicle-mounted minor repair and well-repair operation equipment, characterized in that: It includes a derrick mechanism, a hydraulic clamp mechanism that can be moved left and right on the derrick mechanism, a flippable working platform is arranged on the left side of the derrick mechanism, a detachable rotating table is arranged inside the working platform, and a flange for connecting with a wellhead device is arranged on the rotating platform; a group of first bolt holes is arranged on the rotating platform, and a group of second bolt holes corresponding to the first bolt holes are arranged on the working platform, and the first bolt holes and the second bolt holes are provided with bolts for detachably setting the rotating platform on the working platform; a flange through hole adapted to the flange is also arranged at the bottom of the working platform; the aperture of the flange through hole is larger than the outer diameter of the flange, and an adjustment gap is arranged between the hole wall of the flange through hole and the outer side wall of the flange; The rotating platform is also provided with a well support mechanism, slips and a pipe string centering mechanism that can rotate with it; the derrick mechanism includes a derrick seat, a derrick support is provided on the derrick seat, a derrick platform is provided on the derrick support, a derrick is provided on the derrick platform, and a derrick is provided on the derrick platform. A derrick inner cavity for accommodating a hydraulic clamp mechanism is formed in the middle of the derrick; The hydraulic clamp mechanism includes a hydraulic clamp base arranged on the derrick platform, a lift support which can be raised and lowered is arranged above the hydraulic clamp base, a lifting cylinder is arranged on the lifting support, the cylinder barrel of the lifting cylinder is fixed on the lifting support, and the top of the piston part of the lifting cylinder is hinged on the hydraulic clamp base; a connecting rod mechanism and a forward push cylinder for pushing the connecting rod mechanism to swing left and right are arranged on the front side wall of the lifting support; a clamp support plate which can move left and right with the connecting rod mechanism is arranged on the top of the connecting rod mechanism away from the lifting support; the cylinder barrel of the forward push cylinder is fixed on the front side wall of the lifting support, and the piston part and the connecting rod mechanism are connected; an adjustment plate is arranged on the clamp support plate; a gantry is arranged on the adjustment plate, and a group of support shafts are arranged through the top crossbeam of the gantry, and the support shaft sleeve is provided with a support spring, and a spring pressure plate is arranged on the upper part of the support shaft, and the support spring is arranged between the spring pressure plate and the top frame plate of the gantry; a hydraulic clamp is arranged at the bottom of the support shaft; The tubing centering mechanism includes a centering fixed seat, on which two sets of centering mechanisms are symmetrically arranged relative to the wellhead, and each centering mechanism includes a side thrust cylinder, a rotating seat, a guide seat, a half-pipe positioning sleeve, an adjustment plate, and a side swing cylinder; the bottom of the rotating seat is hinged on the centering fixed seat; the bottom of the cylinder barrel of the side swing cylinder is hinged on the centering fixed seat, and its piston part is hinged on the right side wall of the rotating seat; the guide seat is telescopically arranged on the top of the inner cavity of the rotating seat; the cylinder barrel of the side thrust cylinder is fixed on the left side wall of the rotating seat, and its piston part is hinged on the left side wall of the guide seat; the adjustment plate is arranged on the top of the guide seat; the half-pipe positioning sleeve is arranged on the adjustment plate, which is used to clamp the oil tubing string; when the half-pipe positioning sleeves in the two sets of centering mechanisms are connected, they cooperate to clamp the oil tubing string.

2. The portable vehicle-mounted minor repair and well-repair operation equipment according to claim 1 is characterized in that: The connecting rod mechanism includes two connecting rods and two auxiliary rods. A connecting rod and an auxiliary rod are symmetrically arranged on the front and rear sides of the lifting support respectively, and the connecting rod and the auxiliary rod on the same side of the lifting support are arranged in parallel; the bottoms of the connecting rod and the auxiliary rod are hinged on the lifting support, and the tops are connected to the clamp support plate; a connecting rod shaft is arranged between the two connecting rods, and the piston part of the forward thrust cylinder is hinged to the end of the connecting rod shaft to promote the movement of the connecting rod mechanism; an auxiliary rod shaft is arranged between the two auxiliary rods.

3. The portable vehicle-mounted minor repair and well-repair operation equipment according to claim 2 is characterized in that: A lifting guide rail is also provided on the hydraulic pliers base, and a lifting support is provided with a first roller assembly adapted to the lifting guide rail. The first roller assembly includes a roller that can be lifted and lowered along the lifting guide rail, and a roller shaft fixedly connected to the lifting support is provided at the center of the roller.

4. The portable vehicle-mounted minor repair and well-repair operation equipment according to claim 3 is characterized in that: It comprises a well support seat for setting on the working platform, on which a reversible well support is hinged, on which a gripper for clamping the oil pipe column is arranged, and on which a three-position cylinder is also arranged, whose cylinder barrel is hinged on the well support seat, and the top of its piston part is connected with the well support.

5. The portable vehicle-mounted minor repair and well-repair operation equipment according to claim 4 is characterized in that: The well support is a square frame, and its bottom frame is hinged on the well support seat; two three-position cylinders are provided, and the top ends of the piston parts of the two three-position cylinders are respectively hinged to the front and rear frames of the well support; the gripper is provided on the top frame of the well support.

6. The portable vehicle-mounted minor repair and well-repair operation equipment according to claim 5 is characterized in that: It also includes a column, a transition plate, a flip cylinder, a lifting cylinder, and a second roller assembly; the structure of the second roller assembly is the same as the first roller assembly; the column is fixed on the derrick mechanism, and a guide groove is arranged therein; the lifting cylinder is fixed at the bottom of the column, and the piston part of the lifting cylinder is connected to the roller shaft of the second roller assembly; the roller of the second roller assembly can be lifted and lowered in the guide groove; the transition plate is arranged on the second roller assembly; the cylinder barrel of the flip cylinder and the working platform are hinged on the side wall of the transition plate, and the piston part of the flip cylinder is connected to the bottom of the working platform, so as to realize the flipping of the working platform.

7. The portable vehicle-mounted minor well repair and workover equipment according to claim 6 is characterized in that: A liquid accumulation trough with a trapezoidal cross-section is formed in the working platform, a liquid discharge port is arranged at the bottom of the liquid accumulation trough, and a valve is arranged on the liquid discharge port; a bolt assembly round table protruding from the bottom surface is arranged at the center of the bottom of the liquid accumulation trough, and a flange through hole is formed at the center of the bolt assembly round table; the second bolt hole is arranged on the upper end surface of the bolt assembly round table; the rotating table is arranged in the liquid accumulation trough, which is higher than the liquid discharge port; the rotating table includes a horizontal rotating frame, a vertical rotating frame, and a flange assembly hole, and the horizontal rotating frame and the vertical rotating frame intersect each other perpendicularly at the flange assembly hole, two well support seats are symmetrically arranged on the frames at the front and rear ends of the horizontal rotating frame, and two centering fixed seats are symmetrically arranged on the frames at the front and rear ends of the longitudinal rotating frame.

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