An unmanned operation platform for well repairing

Abstract

The present invention relates to the technical field of oilfield production, and specifically to an unmanned work platform for wellhead repair; the adopted technical scheme is: an unmanned work platform for wellhead repair, comprising a workbench, a flange for pipe rods to pass through is provided in the middle of the workbench; a hydraulic clamp assembly and a pipe push assembly are also provided on the workbench, the hydraulic clamp assembly is used to disassemble and connect the pipe rods, the hydraulic clamp of the hydraulic clamp assembly can move radially along the flange, and the pipe push assembly is used to push the pipe rods away from the workbench. The present invention can efficiently and reliably complete the work of lifting and lowering pipe rods during oilfield well repair, realize mechanical and automated lifting and lowering of pipe rods, and has the characteristics of simple, quick and safe operation. During the entire operation process, the position of the well repair platform is relatively fixed, avoiding the need to adjust the position of the equipment each time the well is repaired, the operation has good repeatability, and the well repair efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of oil field production, and in particular to an unmanned wellhead operation platform for well repair. Background Art

[0002] During the normal production process, oil and gas wells may experience a reduction in production or shutdown. Repair or maintenance work on oil and gas wells is collectively referred to as minor repair work. The basic method of minor repair work is to use the pipe and rod as the main means to take out the original tools and pipes in the well, and then carry out the project construction according to the construction design. After the construction purpose is completed, the repaired tools or pumps are lowered into the predetermined position in the well through the pipe and rod to restore the normal production of the oil and water wells. Downhole operations (minor repair work) are dirty, hard, tiring, dangerous and highly dangerous work. They have high labor intensity, serious environmental pollution and high safety operation risks. It requires 5-6 people / shifts to complete the construction work. Today, with the increasing cost of human resources, the automation and mechanization of well repair operations are an inevitable trend of development, so a mechanized well repair wellhead unmanned operation platform is needed. Summary of the invention

[0003] In view of the problems of high labor intensity and high safety operation risks in the above-mentioned existing oilfield well repair operations, the present invention provides an unmanned wellhead work platform, which can efficiently and reliably complete the work of lifting and lowering pipes during oilfield well repair, realize mechanical and automated lifting and lowering of pipes, and has the characteristics of simple, quick and safe operation.

[0004] The present invention is achieved through the following technical solutions:

[0005] A wellhead unmanned work platform for well repair comprises a workbench, wherein a flange is provided in the middle of the workbench for a pipe rod to pass through; a hydraulic clamp assembly and a pipe push assembly are also provided on the workbench, wherein the hydraulic clamp assembly is used for disassembling and connecting the pipe rod, the hydraulic clamp of the hydraulic clamp assembly can move radially along the flange, and the pipe push assembly is used for pushing the pipe rod away from the workbench.

[0006] When using the pipe lifting rod of the present invention, the hydraulic elevator of the workover rig is first lowered to the bottom of the pipe rod coupling, and the lifting ring of the hanging hydraulic elevator is gently pushed by the straightening manipulator of the pipe pushing assembly to make the elevator clamp the pipe rod and lock the elevator; then the straightening manipulator of the pipe pushing assembly is pushed back, the pneumatic slip of the workover rig is opened, and the pneumatic slip is closed after the pipe rod is lifted up to a suitable position; the hydraulic clamp is moved to the wellhead by the hydraulic clamp assembly to clamp the upper and lower pipe rods by the hydraulic clamp and rotate the shackle; after the two pipe rods are disassembled, the hydraulic clamp is withdrawn, and the two pipe rods are separated by lifting the pipe rod by the workover rig, and the pipe rod is pushed to the pipe rod conveyor of the platform by the straightening manipulator of the pipe pushing assembly, and the pipe rod is sent to the pipe rack by the pipe rod conveyor, and then the straightening manipulator is withdrawn, and the elevator is lowered to stop when the pipe rod is flat on the conveyor, and then the elevator is opened again, and then the elevator is lifted up; the above actions are repeated to remove all the pipe rods in the oil well.

[0007] When the pipe rod is lowered by the present invention, the pipe rod is first delivered to the wellhead by the conveyor through the pipe rod, and the lifting card is lowered by the workover rig to clamp the pipe rod and lift it up. After lifting it to a certain height, the pipe pushing part of the pipe pushing assembly moves to the front end to prepare to receive the pipe rod; then the pipe rod is continuously lifted up to a suitable height, the straightening manipulator retreats to the wellhead position, and the lifting card is lowered again to place the pipe rod on the upper pipe rod coupling; the upper and lower pipe rods are clamped by the hydraulic clamps of the hydraulic clamp assembly and rotated to buckle, and then the hydraulic clamps are retreated, the pneumatic slips of the workover rig are opened, the lifting card is lowered to a suitable position, and then the slips of the workover rig are closed, the lifting card is opened, and the lifting card is lifted up, and the above actions are repeated to lower all the pipe rods on the pipe row into the oil well.

[0008] Therefore, the present invention can efficiently and reliably complete the work of lifting and lowering pipes during well repair in oil fields, realize mechanical and automated lifting and lowering of pipes, and has the characteristics of simple, fast and safe operation. During the entire operation, the position of the well repair platform is relatively fixed, avoiding the need to adjust the position of the equipment every time the well is repaired, the operation repeatability is good, and the well repair efficiency is high.

[0009] As a specific embodiment of the hydraulic pliers, the hydraulic pliers include a main pliers and a backup pliers. The dynamic hydraulic pliers are driven by a hydraulic motor to rotate the hydraulic pliers so that the main pliers clamp the male buckle end of the pipe buckle and the backup pliers clamp the female buckle end of the pipe buckle. The main pliers are then driven to rotate by a first rotating mechanism, so that the male buckle end and the female buckle end of the pipe buckle rotate relative to each other to achieve detachment or attachment.

[0010] As a specific implementation of the hydraulic pliers assembly, the hydraulic pliers assembly includes a fixed frame, the fixed frame is fixedly connected to the workbench, and a first linear drive mechanism is provided on the fixed frame, and the first linear drive mechanism is used to drive the hydraulic pliers to move.

[0011] Furthermore, the hydraulic pliers assembly also includes a vertical buffer mechanism, and the hydraulic pliers are connected to the first linear drive mechanism through the vertical buffer mechanism, so that the hydraulic pliers of the hydraulic pliers assembly can float up and down in the vertical direction, thereby adapting to the floating of the pipe rod when disassembling and connecting the pipe rod.

[0012] As a specific implementation of the push-tube propulsion, the push-tube assembly includes a straightening manipulator and a second linear drive mechanism, and the second linear mechanism is used to drive the push rod part to move along the width direction of the workbench.

[0013] Preferably, the distance from the straightening robot to the workbench is adjustable to accommodate pipes of different lengths or pipes with different pipe coupling positions.

[0014] Furthermore, it also includes a blowout preventer, which is arranged vertically on the workbench. The position of the blowout preventer on the workbench is changeable. The lower end of the blowout preventer is used to connect the upper end of the pipe rod, and the other end of the blowout preventer is used to connect the plug switch to prevent the oil from continuing to erupt when the oil well is blown out and causing waste of energy.

[0015] As a specific implementation method for driving the movement of the blowout preventer, the blowout preventer is connected to the workbench via a third linear drive mechanism, and the third linear drive mechanism is used to drive the blowout preventer to move up and down; the third linear drive mechanism is connected to the workbench via a second rotary drive mechanism, and the second rotary drive mechanism is used to drive the blowout preventer to rotate along the length direction of the third linear drive mechanism.

[0016] Furthermore, an oil receiving portion is provided on the workbench, and the oil receiving portion is located below the flange, so as to collect oil and water dripping from the pipe rod or oil and water overflowing from the wellhead through the oil receiving portion.

[0017] Preferably, an adjusting leg is provided under the workbench, and the adjusting leg is used to adjust the height of the workbench to adapt to different oil well sites.

[0018] Beneficial effects of the present invention:

[0019] 1. The present invention can efficiently and reliably complete the work of lifting and lowering pipes during well repair in oil fields, realize mechanical and automated lifting and lowering of pipes, and has the characteristics of simple, fast and safe operation. During the entire operation process, the position of the well repair platform is relatively fixed, avoiding the need to adjust the position of the equipment every time the well is repaired, the operation repeatability is good, and the well repair efficiency is high.

[0020] 2. A blowout preventer is provided on the workbench, and the position of the blowout preventer on the workbench is changeable. The lower end of the blowout preventer is used to connect the upper end of the pipe rod, and the other end of the blowout preventer is used to connect the cock switch to realize emergency blowout emergency well shut-down.

[0021] 3. An oil receiving portion is provided on the workbench, and the oil receiving portion is located below the flange to collect oil and water dripping from the pipe rod or oil and water overflowing from the wellhead through the oil receiving portion.

[0022] 4. Adjustable legs are provided under the workbench, and the adjustable legs are used to adjust the height of the workbench to adapt to different oil well sites. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0024] Figure 1 It is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 It is a front view of the present invention;

[0026] Figure 3 It is a three-dimensional structural diagram of the hydraulic pliers assembly of the present invention;

[0027] Figure 4 It is a front view of the hydraulic pliers assembly of the present invention;

[0028] Figure 5 It is a three-dimensional structural diagram of the push tube assembly of the present invention;

[0029] Figure 6 It is a three-dimensional structural diagram of a single blowout prevention component of the present invention.

[0030] Marks and corresponding parts names in the attached drawings:

[0031] 1-working table, 2-flange, 3-hydraulic clamp, 4-back-up clamp, 5-main clamp, 51-hydraulic motor, 6-fixed frame, 7-first linear drive mechanism, 8-buffer mechanism, 9-hydraulic clamp bracket, 10-buffer spring, 11-guide rod, 12-rightening manipulator, 13-gantry, 14-second linear drive mechanism, 15-push pipe connecting rod, 16-blowout prevention single root, 17-third linear drive mechanism, 18-take-over connecting rod, 19-second rotary drive mechanism, 20-oil receiving part, 21-oil drain valve, 22-adjusting legs. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention. Example

[0033] A wellhead unmanned work platform for well repair comprises a workbench 1, wherein a flange 2 is provided in the middle of the workbench 1 for a pipe rod to pass through; a hydraulic clamp assembly and a pipe push assembly are also provided on the workbench 1, wherein the hydraulic clamp assembly is used for disassembling and connecting the pipe rod, the hydraulic clamp of the hydraulic clamp assembly can move radially along the flange 2, and the pipe push assembly is used for pushing the pipe rod away from the workbench 1.

[0034] As a specific embodiment of the hydraulic pliers, the hydraulic pliers include a main pliers 5 and a backup pliers 4. The main pliers 5 are driven to rotate by a hydraulic motor 51, so that the back-up pliers 4 clamp the female end of the pipe buckle and the main pliers 5 clamp the male end of the pipe buckle. The main pliers 5 are then driven to rotate by the hydraulic motor 51, so that the male end and the female end of the pipe buckle rotate relative to each other, thereby realizing detachment or fastening.

[0035] However, it can be understood that the jaws of the main tongs 5 ​​and the backup tongs 4 are arranged in parallel for clamping the pipe buckle, and the main tongs 5 ​​are connected to the hydraulic tongs, and the main tongs 5 ​​are driven to rotate by the hydraulic motor 51. The hydraulic motor can be a hydraulic motor or a gear mechanism, a pulley mechanism or a worm gear mechanism driven by a hydraulic motor.

[0036] As a specific embodiment of the hydraulic pliers assembly, the hydraulic pliers assembly includes a fixed frame 6, the fixed frame 6 is fixedly connected to the workbench 1, and a first linear drive mechanism 7 is provided on the fixed frame 6, and the first linear drive mechanism 7 is used to drive the hydraulic pliers to move. The first linear drive mechanism 7 can be a gear rack mechanism, a linear motor mechanism, a hydraulic cylinder, etc. In this embodiment, the first linear drive mechanism 7 is a gear rack mechanism driven by a motor, and the hydraulic pliers 3 and the gear are arranged on a slider, the slider is slidably connected to the fixed frame 6, and a rack is arranged on the fixed frame 6, so that the gear on the slider is driven by the motor to rotate, and the slider is driven to slide along the length of the rack, thereby realizing the movement of the hydraulic pliers.

[0037] Furthermore, the hydraulic pliers assembly also includes a vertical buffer mechanism 8, and the hydraulic pliers are connected to the first linear drive mechanism 7 through the vertical buffer mechanism 8, so that the hydraulic pliers of the hydraulic pliers assembly can float up and down in the vertical direction, so as to adapt to the floating of the pipe rod when the pipe rod is disassembled and connected. Specifically, the hydraulic pliers assembly includes a hydraulic pliers bracket 9, and the hydraulic pliers bracket 9 is fixedly connected to the moving end of the first linear drive mechanism 7, and the hydraulic pliers are connected to the hydraulic pliers bracket 9 through the buffer mechanism 8; as a specific embodiment of the buffer mechanism 8, the buffer mechanism includes a guide rod 11, and the guide rod 11 is vertically arranged and slidably connected to the hydraulic pliers bracket 9, and a buffer spring 10 is arranged on the outer sleeve of the guide rod 11 to absorb the impact between the hydraulic pliers and the hydraulic pliers bracket 9 through the buffer spring 10.

[0038] As a specific implementation of the push-tube propulsion, the push-tube assembly includes a straightening manipulator 12 and a second linear drive mechanism 14, and the second linear drive mechanism 14 is used to drive the push rod part to move along the width direction of the workbench 1. The straightening manipulator 12 is mounted on the workbench 1 through a portal frame 13, and the second linear drive mechanism 14 is arranged on the portal frame 13; similarly, the second linear drive mechanism 14 can be a gear rack mechanism, a linear motor mechanism, a hydraulic cylinder, etc. In this embodiment, the second linear drive mechanism 14 is a gear rack mechanism driven by a motor, and the straightening manipulator 12 and the gear are arranged on a slider, and the slider is slidably connected to the portal frame 13, and a rack is arranged on the portal frame 13, so that the gear on the slider is driven by the motor to rotate, and the slider is driven to slide along the length of the rack, thereby realizing the movement of the straightening manipulator 12.

[0039] Preferably, the distance between the straightening manipulator 12 and the workbench 1 is adjustable to accommodate pipes of different lengths or pipes with different pipe coupling positions. Specifically, the straightening manipulator 12 is connected to the slider on the portal frame 13 through the pipe-pushing connecting rod 15, and the pipe-pushing connecting rod 15 is L-shaped, the horizontal section of the pipe-pushing connecting rod 15 is fixedly connected to the straightening manipulator 12, and the vertical section of the pipe-pushing connecting rod 15 is inserted on the sliding sleeve of the slider on the portal frame 13, and pin holes are provided on the vertical section and the sliding sleeve of the pipe-pushing connecting rod 15 to achieve the connection between the portal frame 13 and the pipe-pushing connecting rod 15 through the limit pin, and the height adjustment of the pipe-pushing connecting rod 15 can be achieved by simply changing the pin hole on the pipe-pushing connecting rod 15 connected by the positioning pin.

[0040] Furthermore, it also includes a blowout preventer 16, which is arranged vertically on the workbench 1, and the position of the blowout preventer 16 on the workbench 1 is changeable. The lower end of the blowout preventer 16 is used to connect the upper end of the pipe rod, and the other end of the blowout preventer 16 is used to connect the plug switch to prevent the oil from continuing to erupt when the oil well is blown out and causing waste of energy.

[0041] As a specific implementation of driving the blowout preventer 16 to move, the blowout preventer 16 is connected to the workbench 1 through a third linear drive mechanism 17, and the third linear drive mechanism 17 is used to drive the blowout preventer 16 to move up and down; the third linear drive mechanism 17 is connected to the workbench 1 through a second rotary drive mechanism 19, and the second rotary drive mechanism 19 is used to drive the blowout preventer 16 to rotate along the length direction of the third linear drive mechanism 17. The blowout preventer 16 is driven to rotate above the pipe orifice by the second rotary drive mechanism 19, and then the blowout preventer 16 is driven to move and contact the pipe orifice by the third linear drive mechanism 17.

[0042] Normally, the blowout preventer 16 is fixed to the pipe connecting rod 18, and the whole mechanism is installed on one side of the well repair platform, which does not affect the well repair operation of the platform. After a blowout occurs, the blowout preventer 16 is rotated to the top of the wellhead by the second rotary drive mechanism (a worm gear driven by a hydraulic motor in this embodiment) reducer, and the height is adjusted by the third linear drive mechanism 17 (a hydraulic rod in this embodiment), and the blowout preventer 16 is placed at the pipe rod coupling, and the blowout preventer 16 is quickly installed in conjunction with the hydraulic clamp assembly on the well repair platform, so that the well can be shut down in an emergency by using the plug switch on the blowout preventer 16.

[0043] Furthermore, the workbench 1 is provided with an oil receiving portion 20, which is located below the flange 2, so as to collect the oil and water dripping from the pipe rod or the oil and water overflowing from the wellhead through the oil receiving portion 20. The oil receiving portion 20 is a funnel-shaped or other concave trough body, and an oil drain valve 21 is provided at the bottom of the oil receiving portion 20 to collect the oil and water collected by the oil receiving portion 20.

[0044] Preferably, an adjustable leg 22 is provided under the workbench 1, and the adjustable leg 22 is used to adjust the height of the workbench 1 to adapt to different oil well sites. It should be understood that the adjustable leg 22 can be a common rod with adjustable length, such as a hydraulic rod, a mutually threaded screw and a rod sleeve.

[0045] Instructions for use of this embodiment:

[0046] When using the present embodiment to lift the pipe rod, first lower the hydraulic elevator of the workover rig to below the pipe rod coupling, and gently push the lifting ring of the hanging hydraulic elevator by the straightening manipulator 12 of the pipe pushing assembly to allow the elevator to clamp the pipe rod and lock the elevator; then push back the straightening manipulator 12 of the pipe pushing assembly, open the pneumatic slip of the workover rig, lift the pipe rod to a suitable position and then close the pneumatic slip; move the hydraulic clamp to the wellhead by the hydraulic clamp assembly to clamp the upper and lower pipe rods and rotate the shackle by the hydraulic clamp; after the two pipe rods are disassembled, the hydraulic clamp is withdrawn, and the two pipe rods are separated by lifting the pipe rod by the workover rig, and the pipe rod is pushed to the pipe rod conveyor of the platform by the straightening manipulator 12 of the pipe pushing assembly, and the pipe rod is sent to the pipe rack by the pipe rod conveyor, and then the straightening manipulator 12 is withdrawn, and the elevator is lowered to stop when the pipe rod is flat on the conveyor, and then the elevator is opened again, and then the elevator is lifted up; repeat the above actions to remove all the pipe rods in the oil well.

[0047] When using the present embodiment to lower the pipe rod, the pipe rod is first delivered to the wellhead by the conveyor through the pipe rod, and the lifting card is lowered by the workover rig to clamp the pipe rod and lift it up. After lifting it to a certain height, the tube-holding part of the push pipe assembly is moved to the front end to prepare to receive the pipe rod; then the pipe rod is continuously lifted up to a suitable height, the straightening manipulator 12 is withdrawn to the wellhead position, and the lifting card is lowered again to place the pipe rod on the upper pipe rod coupling; the upper and lower pipe rods are clamped by the hydraulic clamp of the hydraulic clamp assembly, and rotated to buckle, and then the hydraulic clamp is withdrawn, the pneumatic slips of the workover rig are opened, the lifting card is lowered to a suitable position, and then the slips of the workover rig are closed, the lifting card is opened, and the lifting card is lifted up, and the above actions are repeated to lower all the pipe rods on the pipe row into the oil well.

[0048] Therefore, the present invention can efficiently and reliably complete the work of lifting and lowering pipes during well repair in oil fields, realize mechanical and automated lifting and lowering of pipes, and has the characteristics of simple, fast and safe operation. During the entire operation, the position of the well repair platform is relatively fixed, avoiding the need to adjust the position of the equipment every time the well is repaired, the operation repeatability is good, and the well repair efficiency is high.

[0049] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An unmanned work platform for well repair, comprising a workbench (1), characterized in that: The workbench (1) has a flange (2) in the middle thereof for the pipe rod to pass through; the workbench (1) is also provided with a hydraulic clamp assembly and a pipe push assembly, the hydraulic clamp assembly is used for making and breaking out the pipe rod, the hydraulic clamp of the hydraulic clamp assembly can move radially along the flange (2), and the pipe push assembly is used for pushing the pipe rod away from the workbench (1); The hydraulic pliers assembly comprises a fixed frame (6), the fixed frame (6) being fixedly connected to the workbench (1), and a first linear drive mechanism (7) being provided on the fixed frame (6), the first linear drive mechanism (7) being used to drive the hydraulic pliers to move; It also includes a blowout prevention single root (16), the blowout prevention single root (16) is arranged vertically on the workbench (1), the position of the blowout prevention single root (16) on the workbench (1) is changeable, the lower end of the blowout prevention single root (16) is used to connect to the upper end of the pipe rod, and the other end of the blowout prevention single root (16) is used to connect to the cock switch; The blowout preventer (16) is connected to the workbench (1) via a third linear drive mechanism (17), and the third linear drive mechanism (17) is used to drive the blowout preventer (16) to move up and down; the third linear drive mechanism (17) is connected to the workbench (1) via a second rotary drive mechanism (19), and the second rotary drive mechanism (19) is used to drive the blowout preventer (16) to rotate along the length direction of the third linear drive mechanism (17).

2. The unmanned wellhead work platform according to claim 1, characterized in that: The hydraulic tongs comprise a main tong (5) and a backup tong (4); the main tongs (5) are driven to rotate by a hydraulic motor (51).

3. The unmanned wellhead work platform according to claim 2, characterized in that: The hydraulic pliers assembly further comprises a vertical buffer mechanism (8), and the hydraulic pliers are connected to the first linear drive mechanism (7) via the vertical buffer mechanism (8).

4. The unmanned wellhead work platform according to claim 1, characterized in that: The push-tube assembly comprises a straightening manipulator (12) and a second linear drive mechanism (14), wherein the second linear drive mechanism (14) is used to drive the push rod portion to move along the width direction of the workbench (1).

5. The unmanned wellhead work platform according to claim 4, characterized in that: The distance between the straightening manipulator (12) and the workbench (1) is adjustable.

6. The unmanned wellhead work platform according to claim 1, characterized in that: The workbench (1) is provided with an oil receiving portion (20), and the oil receiving portion (20) is located below the flange (2).

7. The unmanned wellhead work platform according to claim 1, characterized in that: An adjusting leg (22) is provided below the workbench (1), and the adjusting leg (22) is used to adjust the height of the workbench (1).

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