A remote automated power tong hydraulic system and power tong device

Abstract

The present application relates to the technical field of drilling wellhead operation equipment, and particularly relates to a remote automatic power tong hydraulic system and a power tong device, which comprises a clamping oil cylinder for controlling a tong mouth of the power tong to clamp a pipe string, a rotary motor for controlling the tong mouth of the power tong to rotate and unscrew the pipe string, a moving oil cylinder for driving the power tong to move forward and backward, and a lifting oil cylinder for driving the power tong to lift; the clamping oil cylinder and the rotary motor are arranged in parallel, so that the tong mouth of the power tong is clamped while rotating; a hydraulic circuit for controlling the clamping oil cylinder and the rotary motor comprises a first electromagnetic reversing valve and a second electromagnetic reversing valve, and the first electromagnetic reversing valve and the second electromagnetic reversing valve are arranged in parallel to control the rotating speed of the rotary motor.

Description

Technical Field

[0001] This invention relates to the field of drilling wellhead operation equipment technology, and in particular to a remote automated power tong hydraulic system and power tong device. Background Technology

[0002] Hydraulic power tongs are automated tools used to loosen or loosen threads on drill pipes or tubing during drilling operations. As the loosening and loosening of threads becomes more frequent during tripping operations, the workload of hydraulic power tongs increases accordingly.

[0003] Traditional hydraulic power wrenches still require operators to operate at close range at the borehole opening. In addition, since the thread positions that need to be unscrewed on the tubing string are not fixed when unscrewing, the position of the power wrenches must be manually adjusted to unscrew the threads. This results in high labor intensity, poor working environment at the borehole opening, low safety factor, and easy danger.

[0004] In order to improve safety and reduce the labor intensity of operators, there is an urgent need for a remote automated power clamp hydraulic system and power clamp device that can realize remote control and operation of the power clamp, while also having the function of manual control. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a remote automated power clamp hydraulic system and a power clamp device, which solves the technical problem that the existing power clamps cannot automatically fasten and unfasten the tubing.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0009] A remote automated power clamp hydraulic system includes: a clamping cylinder for controlling the clamp jaws to grip a tubing string, a rotary motor for controlling the rotation of the clamp jaws to loosen or unscrew the tubing string, a moving cylinder for driving the power clamp to move back and forth, and a lifting cylinder for driving the power clamp to lift up and down.

[0010] The clamping cylinder and the rotary motor are connected in parallel so that the power clamp jaws rotate while clamping the tubing column.

[0011] The hydraulic circuit for controlling the clamping cylinder and the rotary motor includes a first solenoid directional valve and a second solenoid directional valve, which are connected in parallel to control the rotation speed of the rotary motor.

[0012] The hydraulic circuit of the movable cylinder includes a proportional directional valve and a third solenoid directional valve; the proportional directional valve is connected to the oil inlet circuit and is used to control the moving speed of the movable cylinder.

[0013] The third electromagnetic reversing valve is connected to the oil inlet and return lines and is used to control the movement of the movable cylinder.

[0014] The hydraulic circuit of the movable cylinder also includes a first hydraulic lock, which is connected between the third solenoid directional valve and the movable cylinder.

[0015] When the third electromagnetic directional valve is in the neutral position, the first hydraulic lock locks the return oil, keeping the moving cylinder stationary under load. When the third electromagnetic directional valve is in the left or right position, the first hydraulic lock controls the oil inlet to open, allowing the moving cylinder to move.

[0016] The hydraulic circuit of the movable cylinder includes an automatic control state and a manual control state. The proportional directional valve is connected in parallel with a ball valve, and the ball valve is connected to the oil inlet circuit.

[0017] When the movable cylinder is in automatic control mode, the ball valve is closed and the proportional directional valve is open;

[0018] When the movable cylinder is in manual control mode, the ball valve is open and the proportional directional valve is closed.

[0019] The hydraulic circuit of the movable cylinder also includes a pressure reducing valve, which is connected to the oil inlet. The pressure reducing valve is used to adjust the oil inlet pressure of the hydraulic circuit of the movable cylinder to the required pressure of the hydraulic circuit.

[0020] The hydraulic circuit of the lifting cylinder includes a fourth solenoid directional valve and a two-way throttle speed control valve.

[0021] The fourth electromagnetic reversing valve is connected to the oil inlet circuit and the oil return circuit, and is used to control the movement of the lifting cylinder.

[0022] The bidirectional throttling speed control valve is connected between the fourth electromagnetic reversing valve and the lifting cylinder, and is used to adjust the moving speed of the lifting cylinder.

[0023] The hydraulic circuit of the lifting cylinder also includes a second hydraulic lock, which is connected between the fourth solenoid directional valve and the bidirectional throttle speed control valve.

[0024] When the fourth electromagnetic reversing valve is in the neutral position, the second hydraulic lock locks the oil in the oil circuit between the lifting cylinder and the second hydraulic lock, so that the lifting cylinder remains stationary under load.

[0025] When the fourth electromagnetic directional valve is in the left or right position, the second hydraulic lock controls the oil inlet to open, enabling the lifting cylinder to move.

[0026] It also includes a control system for controlling the travel of the clamping cylinder, rotary motor, moving cylinder and lifting cylinder.

[0027] Pressure sensors and pressure gauges are provided on the hydraulic circuits of the clamping cylinder and the rotary motor, and the pressure sensors and pressure gauges are connected to the control system.

[0028] After the pressure sensor detects that the pipeline pressure has reached a preset value, the control system controls the first and second electromagnetic directional valves to return to the neutral position, and the clamping cylinder and rotary motor stop working.

[0029] A power clamp device, employing the remote automated power clamp hydraulic system, includes: a sliding base frame, a frame body, a lifting mechanism, a power clamp, a drive device, and a control device. The power clamp is suspended at the front end of the lifting mechanism, and the lifting mechanism is slidably connected to the frame body. The power clamp and the drive device are connected to the control device.

[0030] The drive device includes a clamping cylinder for controlling the power pliers jaws to grip the tubing, a rotary motor for controlling the power pliers jaws to rotate and loosen the tubing, a moving cylinder for controlling the frame body to move back and forth along the sliding base, and a lifting cylinder for controlling the lifting mechanism to move up and down along the frame body.

[0031] (III) Beneficial Effects

[0032] The beneficial effects of the present invention are: The present invention provides a remote automated power clamp hydraulic system, which is applied to power clamps. It realizes remote fully automated control of the power clamp device through the control system, the hydraulic circuit of the rotary motor, the hydraulic circuit of the clamping cylinder, the hydraulic circuit of the moving cylinder and the hydraulic circuit of the lifting cylinder, and can also realize manual control of the local hydraulic circuit when the equipment fails or is being debugged.

[0033] By connecting the rotary motor and the power clamping cylinder in parallel, the power clamp automatically and synchronously clamps the tubing string when it is being engaged or disengaged.

[0034] By setting up a first and second solenoid directional valve in parallel, the rotational motor speed is increased, thereby improving the speed of threading and unthreading. Simultaneously, the rotational motor is equipped with speed regulation; in automatic control mode, it can switch between high-speed and low-speed rotation, while in manual control mode, it rotates at low speed for enhanced safety.

[0035] By incorporating a pressure-reducing valve and a proportional directional valve, the control precision of the moving cylinder's movement is improved, allowing for precise control of the moving speed and preventing the drill bit from bending. Furthermore, a bidirectional throttling speed control valve is used to regulate the moving speed of the lifting cylinder, enabling minute adjustments to its distance.

[0036] The hydraulic circuit of the movable cylinder is also equipped with a ball valve, which is connected in parallel with the proportional directional valve. The ball valve enables the switching between automatic and manual control of the movable cylinder, preventing the power clamp from being unable to move in the event of a malfunction, thus affecting the use of the tubing or other equipment. Attached Figure Description

[0037] Figure 1 This is a hydraulic circuit diagram of the remote automated power clamp hydraulic system of the present invention;

[0038] Figure 2 This is a perspective view of the power clamp device of the present invention.

[0039] [Explanation of Labels in the Attached Image]

[0040] 11: Clamping cylinder; 12: Rotary motor; 13: First solenoid directional valve; 14: Second solenoid directional valve; 15: Pressure sensor; 16: Pressure gauge; 17: Limit switch;

[0041] 21: Moving cylinder; 22: Third solenoid directional valve; 23: Pressure reducing valve; 24: Proportional directional valve; 25: Ball valve; 26: First hydraulic lock;

[0042] 31: Lifting cylinder; 32: Fourth solenoid directional valve; 33: Two-way throttle speed control valve; 34: Second hydraulic lock;

[0043] 41: Oil inlet pressure test port; 42: Oil return pressure test port; 43: Displacement sensor;

[0044] 5: Sliding base frame;

[0045] 6: Main frame;

[0046] 7: Lifting mechanism; 71: First sliding inner frame; 72: Second sliding inner frame; 73: Pulley;

[0047] 8: Power pliers; 81: Power pliers jaws;

[0048] 9: Floating mechanism. Detailed Implementation

[0049] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] This invention provides a remote automated power clamp hydraulic system that connects a rotary motor 12 and a power clamping cylinder 11 in parallel, ensuring that the power clamp 8 automatically and synchronously clamps the tubing string during both clamping and unclamping operations. The control system includes automatic and manual control. In automatic control mode, the first and second solenoid directional valves 13 and 14, connected in parallel, are simultaneously energized, allowing oil to enter the rotary motor 12 through dual oil lines, increasing its speed and thus improving the clamping and unclamping speed of the tubing string. When the rotation speed of the rotary motor 12 needs adjustment, simply adjust the second solenoid directional valve 14 to the neutral position, changing the dual-port oil inlet to a single-port oil inlet, thus controlling the rotary motor 12 to rotate slowly. Simultaneously, in the slow rotation state of the rotary motor 12, the power clamp 8 can be manually controlled, making it safer for operators.

[0051] By setting up a pressure reducing valve 23 and a proportional directional valve 24, the control precision of the moving action of the moving cylinder 21 is improved, the moving speed is finely controlled, and collisions with the drill bit are prevented. By setting up a bidirectional throttling speed regulating valve 33, the moving speed of the lifting cylinder 31 is controlled, so as to achieve fine adjustment of the lifting cylinder 31.

[0052] The hydraulic circuit of the movable cylinder 21 is also equipped with a ball valve 25, which is connected in parallel with the proportional directional valve 24. In automatic control mode, the ball valve 25 is closed, and the movable cylinder 21 is precisely controlled by connecting the proportional directional valve 24 and the third solenoid directional valve 22 in series. If the third solenoid directional valve 22 is de-energized, or if the proportional directional valve 24 malfunctions and its oil circuit is blocked, manual operation is required. Opening the ball valve 25 will then manually control the third solenoid directional valve 22 to circulate oil. This prevents the power clamp 8 from failing to retract in case of a malfunction, which could affect the use of the tubing or other equipment.

[0053] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0054] Example 1:

[0055] See appendix Figure 1This invention provides a remote automated power clamp hydraulic system applied to a power clamp device, comprising: a control system; a clamping cylinder 11 for controlling the clamp jaws 81 to grip a tubing column; a rotary motor 12 for controlling the rotation of the clamp jaws 81 to loosen or unscrew the tubing column; a moving cylinder 21 for driving the power clamp 8 to move back and forth; and a lifting cylinder 31 for driving the power clamp 8 to lift and lower. The control system controls the remote automated power clamp hydraulic system, including controlling the travel of the aforementioned actuators (clamping cylinder 11, rotary motor 12, moving cylinder 21, and lifting cylinder 31), and the control methods include automatic control and manual control.

[0056] The clamping cylinder 11 and the rotary motor 12 are connected in parallel so that the power clamp 8 automatically and synchronously clamps the tubing string when it is tightening or loosening it. The hydraulic circuit for controlling the clamping cylinder 11 and the rotary motor 12 includes a first solenoid directional valve 13 and a second solenoid directional valve 14. The first solenoid directional valve 13 and the second solenoid directional valve 14 are connected in parallel. By simultaneously supplying oil to the first solenoid directional valve 13 and the second solenoid directional valve 14, the oil supply speed of the clamping cylinder 11 and the rotary motor 12 is increased, so that the rotary motor 12 rotates faster and the speed of tightening and loosening the tubing string is faster.

[0057] The first solenoid directional valve 13 adopts an O-type neutral position function, and the second solenoid directional valve 14 adopts a Y-type neutral position function. Both the first solenoid directional valve 13 and the second solenoid directional valve 14 are three-position solenoid directional valves. When the first solenoid directional valve 13 and the second solenoid directional valve 14 are in the neutral position, the clamping cylinder 11 and the rotary motor 12 stop working. When the first solenoid directional valve 13 and the second solenoid directional valve 14 are in the left or right position, the movement direction of the clamping cylinder 11 and the rotary motor 12 is controlled by changing the oil inlet and return paths.

[0058] When the remote automated power clamp hydraulic system is in automatic control mode, the first solenoid directional valve 13 and the second solenoid directional valve 14 are simultaneously energized, controlling the rotary motor 12 to rotate, performing clamping and unclamping, increasing the oil inlet speed of the rotary motor 12, and making the rotary motor 12 rotate faster. When the first solenoid directional valve 13 and the second solenoid directional valve 14 are energized, the clamping cylinder 11 synchronously supplies oil to control the power clamp 8 to clamp the tubing string.

[0059] By connecting the first solenoid directional valve 13 and the second solenoid directional valve 14 in parallel, the rotary motor 12 can switch its rotational speed. When it is necessary to control the rotational speed of the power clamp 8 for fastening and unfastening, the oil supply to the rotary motor 12 is changed by controlling the second solenoid directional valve 14, thereby switching the rotational speed of the rotary motor 12. That is, when high-speed rotation is required, the first solenoid directional valve 13 and the second solenoid directional valve 14 are energized simultaneously, adjusting the first solenoid directional valve 13 and the second solenoid directional valve 14 to the left or right position at the same time. The rotary motor 12 receives oil through the oil inlet circuits of the first solenoid directional valve 13 and the second solenoid directional valve 14 simultaneously. The oil supply speed is faster through the dual oil circuits, and the rotary motor 12 rotates at high speed. When switching from high-speed to low-speed rotation, the first solenoid directional valve 13 is adjusted to the neutral position, and the second solenoid directional valve 14 is in the left or right position. The first solenoid directional valve 13 operates in the neutral position (0 position), closing one oil circuit and changing the dual oil inlet circuit to a single oil inlet circuit. This alters the oil inlet speed of the rotary motor 12 without affecting the return oil circuit, thereby regulating the rotation speed of the rotary motor 12. Simultaneously, in the single oil inlet state, the rotary motor 12 rotates slowly, making it more suitable for applications requiring manual control of the power clamp 8.

[0060] Furthermore, to prevent the power clamp 8 from applying excessive force and damaging the drill string during automatic coupling and uncoupling, a pressure sensor 15 and a pressure gauge 16 are installed in the circuit of the clamping cylinder 11 and the rotary motor 12 to display the coupling and uncoupling torque in real time. Before coupling or uncoupling operations, the torque required for different drill strings can be preset through the control system. After the pressure sensor 15 detects that the pipeline pressure has reached the set value, it controls the first solenoid directional valve 13 and the second solenoid directional valve 14 to return to the neutral position, stopping the oil supply and preventing the rotary motor 12 from damaging the drill string coupling.

[0061] The first electromagnetic reversing valve 13 and the second electromagnetic reversing valve 14 adopt a dual control mode of remote electric control and manual control, which can be used for remote automatic control or manual operation in emergency situations.

[0062] The hydraulic circuit of the movable cylinder 21 includes a proportional directional valve 24, a third solenoid directional valve 22, and a first hydraulic lock 26. The proportional directional valve 24 is connected to the oil inlet circuit. By controlling the flow rate of the oil inlet circuit, the extension and retraction speed of the movable cylinder 21 is controlled, thereby controlling the movement speed of the power clamp 8. The third solenoid directional valve 22 is a three-position solenoid directional valve. The third solenoid directional valve 22 is used to control whether the movable cylinder 21 extends or retracts, and to control the extension and retraction action of the movable cylinder 21, thereby controlling whether the power clamp 8 moves and controlling the direction of movement of the power clamp 8. When the third solenoid directional valve 22 is in the neutral position, the movable cylinder 21 stops moving. When the third solenoid directional valve 22 is in the left or right position, by changing the oil inlet and return paths, the extension and retraction action of the movable cylinder 21 is controlled, thereby controlling the direction of movement of the power clamp 8. In automatic control mode, the combination of the third solenoid directional valve 22 and the proportional directional valve 24 achieves precise control of the movement of the movable cylinder 21.

[0063] The first hydraulic lock 26 is used to lock the return oil in the oil circuit when the third solenoid directional valve 22 is in the neutral position, ensuring that the moving cylinder 21 is stationary under load, that is, the moving cylinder 21 stops moving and is in standby mode. When the third solenoid directional valve 22 is in the left or right position, it controls the oil inlet circuit to open the hydraulic lock, realizing the movement of the cylinder.

[0064] The hydraulic circuit of the movable cylinder 21 also includes a ball valve 25 connected in parallel with the proportional directional valve 24. The ball valve 25 is connected to the oil inlet. If it is in automatic control mode, the ball valve 25 is closed. The movable cylinder 21 is precisely controlled by the proportional directional valve 24 and the third solenoid directional valve 22 connected in series.

[0065] If the third solenoid directional valve 22 is de-energized, or if the proportional directional valve 24 malfunctions and its oil circuit is blocked, manual operation is required. Opening the ball valve 25 allows manual control of the third solenoid directional valve 22 to circulate oil, thus controlling the movement of the movable cylinder 21. By using the ball valve 25, manual operation of the movable cylinder 21 can be achieved in emergency situations.

[0066] The hydraulic circuit of the movable cylinder 21 also includes a pressure reducing valve 23. The pressure reducing valve 23 is connected to the oil inlet and is used to adjust the inlet pressure of the hydraulic circuit of the movable cylinder 21 to the required pressure for that circuit. That is, if the inlet pressure before the pressure reducing valve 23 is high, the pressure can be adjusted by the pressure reducing valve 23, and by setting the pressure reducing valve 23, the outlet pressure can be automatically kept stable. The preset pressure can be set by the control system, which then controls the pressure reducing valve 23 to adjust to the preset pressure.

[0067] Since the moving cylinder 21 controls the power tongs 8 to move back and forth, there is a possibility that it may collide with the drill string. Therefore, a pressure reducing valve 23 is installed to reduce the pressure and prevent the moving cylinder 21 from causing the power tongs 8 to bend the drill string. By installing a proportional directional valve 24, the moving speed of the moving cylinder 21 can be controlled more precisely. The combination of the pressure reducing valve 23 and the proportional directional valve 24 achieves precise control over the moving action of the moving cylinder 21.

[0068] Because the positions of each pipe string coupling may differ slightly during tripping operations, it is necessary to improve the movement accuracy of the lifting cylinder 31 to allow for minute adjustments. The hydraulic circuit of the lifting cylinder 31 includes a fourth solenoid directional valve 32, a second hydraulic lock 34, and a two-way throttle speed control valve 33. The fourth solenoid directional valve 32 is a three-position solenoid directional valve used to adjust the movement direction of the lifting cylinder 31, i.e., to adjust its extension and retraction. The second hydraulic lock 34 locks the return oil in the hydraulic circuit when the fourth solenoid directional valve 32 is in the neutral position, ensuring that the moving cylinder 21 remains stationary under load, i.e., the moving cylinder 21 stops moving and is in standby mode. When the fourth solenoid directional valve 32 is in the left or right position, it controls the inlet oil circuit to open the check valve, thus actuating the cylinder. The bidirectional throttling speed control valve 33 is used to limit the inlet and outlet flow rates of the fourth electromagnetic directional valve 32, and to adjust the moving speed of the lifting cylinder 31, thereby controlling the minute distance adjustment of the lifting cylinder 31. Meanwhile, since the lifting cylinder 31 controls the power tongs 8 to move slowly up and down along the drill string, unlike the moving cylinder 21, it will not affect the drill string. Only the accuracy of controlling the lifting and lowering movement of the power tongs 8 needs to be considered. Therefore, the moving speed of the lifting cylinder 31 can be controlled by setting the bidirectional throttling speed control valve 33.

[0069] The third solenoid directional valve 22 and the fourth solenoid directional valve 32 adopt both electric and manual control modes, which can be used for remote automatic control or manual operation in emergency situations.

[0070] Each hydraulic circuit is equipped with an inlet pressure test port 41 and a return pressure test port 42 on the inlet and return oil paths, respectively. The pressure test ports are used to measure the hydraulic pressure of the oil circuit and feed it back to the control system.

[0071] Example 2:

[0072] A camera is installed in the power tongs head, and the camera is connected to the control system. The operator can observe the position of the pipe string coupling and the power tongs head in real time from the driller's room through the camera installed in the power tongs head, so as to make fine adjustments to the height of the power tongs 8.

[0073] The driller's cabin is a workspace that integrates the control and display systems. Operators can operate the control and display systems from inside the driller's cabin, thereby achieving remote control of the remote automated power tong hydraulic system.

[0074] Example 3:

[0075] The moving cylinder 21 and the lifting cylinder 31 are equipped with displacement sensors 43, which display the moving position in real time on the display screen in the driller's cabin via digital signals, so that the operator can check the position of the moving cylinder 21 and the lifting cylinder 31 in real time.

[0076] Example 4:

[0077] A dual-stroke switch 17 is installed on the head of the power pliers. The dual-stroke switch 17 is used to detect the stroke of the power pliers 8 when engaging and disengaging. The engagement and disengaging strokes of each type of pipe string are fixed and can be set in the control system.

[0078] Example 5:

[0079] See appendix Figure 2 This invention provides a power clamp device employing the aforementioned remote automated power clamp hydraulic system, comprising: a sliding base frame 5, a frame body 6, a lifting mechanism 7, a power clamp 8, a drive device, and a control device. The power clamp 8 is suspended from the front end of the lifting mechanism 7, and the lifting mechanism 7 is slidably connected to the frame body 6. The control device is connected to a control system, and the power clamp 8 and the drive device are connected to the control device to achieve fully automated control of the power clamp device.

[0080] The power clamp 8 includes a clamp jaw 81 for fastening and unfastening the tubing string. The drive unit includes a clamping cylinder 11 for controlling the clamp jaw 81 to grip the tubing string, a rotary motor 12 for controlling the rotation of the clamp jaw 81 to loosen or unfasten the tubing string, a moving cylinder 21 for controlling the frame body 6 to move back and forth along the sliding base frame 5, and a lifting cylinder 31 for controlling the lifting mechanism 7 to move up and down along the frame body 6.

[0081] The lifting mechanism 7 includes a first sliding inner frame 71 and a second sliding inner frame 72, which are slidably connected from the inside to the outside. The power clamp 8 is suspended in front of the second sliding inner frame 72, and the top of the second sliding inner frame 72 is connected to the floating mechanism 9.

[0082] The top of the first sliding inner frame 71 is provided with a pulley 73. One end of the wire rope (not shown) used to pull the second sliding inner frame 72 is connected to the floating mechanism 9 through the pulley 73, and the other end of the wire rope (not shown) is connected to the frame body 6.

[0083] The movable cylinder 21 is installed on both sides of the frame body 6. The telescopic end of the movable cylinder 21 is connected to the sliding base frame 5, and the connecting end of the movable cylinder 21 is connected to the frame body 6. The movable cylinder 21 drives the frame body 6 to slide along the sliding base frame 5.

[0084] The lifting cylinder 31 is located on the rear side of the first sliding inner frame 71. The connecting end of the lifting cylinder 31 is connected to the frame body 6, and the telescopic end of the lifting cylinder 31 is connected to the first sliding inner frame 71. The lifting cylinder 31 drives the first sliding inner frame 71 to slide along the vertical direction of the frame body 6.

[0085] By controlling the power clamp device through a remote automated power clamp hydraulic system, remote fully automated control of the power clamp device can be achieved.

[0086] The method of controlling the locking and unlocking of the power clamp device via a hydraulic system includes the following steps:

[0087] Step 1: Move the power clamp 8 to the orifice position by moving the hydraulic cylinder 21;

[0088] Step 2: Control the power clamp 8 to move to the pipe column coupling position using the lifting cylinder 31;

[0089] Step 3: The clamping cylinder 11 controls the power clamp jaws 81 to clamp the pipe coupling. At the same time, the rotary motor 12 controls the rotation of the power clamp jaws 81 to fasten or unfasten the pipe coupling.

[0090] This invention provides a remote automated power clamp hydraulic system applied to a power clamp device. Through the control system, the hydraulic circuit of the rotary motor 12, the hydraulic circuit of the clamping cylinder 11, the hydraulic circuit of the moving cylinder 21, and the hydraulic circuit of the lifting cylinder 31, the system achieves remote fully automated control of the power clamp device, and also enables manual control of the local hydraulic circuits during equipment failure or debugging.

[0091] By connecting the rotary motor 12 and the power clamping cylinder 11 in parallel, the power clamp 8 automatically and synchronously clamps the tubing string when it is fastening or unfastening the tubing string.

[0092] By setting up a first electromagnetic reversing valve 13 and a second electromagnetic reversing valve 14 in parallel, the rotational speed of the rotary motor 12 is increased, thereby increasing the speed of the threaded connection and disconnection. Simultaneously, the rotary motor 12 is equipped with a speed regulation function. In automatic control mode, the rotary motor 12 can rotate at both high and low speeds; in manual control mode, the rotary motor 12 rotates at low speed for safer operation.

[0093] By setting pressure sensor 15 and pressure gauge 16, the torque for threading and unthreading can be displayed in real time. Before threading or unthreading operations, the torque required for different drill strings can be preset through the control system. After pressure sensor 15 detects that the pipeline pressure has reached the set value, it controls the first solenoid directional valve 13 and the second solenoid directional valve 14 to return to the neutral position.

[0094] By setting up a pressure reducing valve 23 and a proportional directional valve 24, the control precision of the moving action of the moving cylinder 21 is improved, the moving speed is finely controlled, and collisions with the drill bit are prevented. By setting up a bidirectional throttling speed regulating valve 33, the moving speed of the lifting cylinder 31 is controlled, so as to achieve fine adjustment of the lifting cylinder 31.

[0095] The hydraulic circuit of the movable cylinder 21 is also equipped with a ball valve 25, which is connected in parallel with the proportional directional valve 24. By setting the ball valve 25, the automatic control and manual control of the movable cylinder 21 can be switched, so as to avoid the power clamp 8 being unable to move in the event of a fault, which would affect the use of the tubing or other equipment.

[0096] By setting up monitoring equipment, the control and display systems are integrated, enabling operators to observe the operation in real time from a distance.

[0097] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0098] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0099] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0100] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0101] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A remote automated power clamp hydraulic system, characterized in that, include: A clamping cylinder (11) for controlling the clamping jaws (81) of the power clamp to hold the tubing, a rotary motor (12) for controlling the rotation of the clamping jaws (81) to unscrew the tubing, a moving cylinder (21) for driving the power clamp (8) to move back and forth, and a lifting cylinder (31) for driving the power clamp (8) to lift up and down. The clamping cylinder (11) and the rotary motor (12) are connected in parallel so that the power clamp jaws (81) can clamp the tubing while rotating; The hydraulic circuit for controlling the clamping cylinder (11) and the rotary motor (12) includes a first solenoid directional valve (13) and a second solenoid directional valve (14), which are connected in parallel to control the rotation speed of the rotary motor (12). The hydraulic circuit of the movable cylinder (21) includes a proportional directional valve (24), a third solenoid directional valve (22), and a ball valve (25); the proportional directional valve (24) is connected to the oil inlet circuit and is used to control the moving speed of the movable cylinder (21); the third solenoid directional valve (22) is connected to the oil inlet circuit and the oil return circuit and is used to control the moving action of the movable cylinder (21). The ball valve (25) is connected to the oil inlet and is connected in parallel with the proportional directional valve (24). If the third solenoid directional valve (22) is de-energized or the oil circuit of the proportional directional valve (24) is blocked, the ball valve (25) opens to control the movement of the moving cylinder (21).

2. The remote automated power clamp hydraulic system according to claim 1, characterized in that, The hydraulic circuit of the movable cylinder (21) also includes a first hydraulic lock (26), which is connected between the third solenoid directional valve (22) and the movable cylinder (21). When the third electromagnetic directional valve (22) is in the neutral position, the first hydraulic lock (26) locks the return oil, so that the moving cylinder (21) remains stationary under load. When the third electromagnetic directional valve (22) is in the left or right position, the first hydraulic lock (26) controls the oil inlet to open, so that the moving cylinder (21) can move.

3. The remote automated power clamp hydraulic system according to claim 2, characterized in that, The hydraulic circuit of the movable cylinder (21) also includes a pressure reducing valve (23), which is connected to the oil inlet. The pressure reducing valve (23) is used to adjust the oil inlet pressure of the hydraulic circuit of the movable cylinder (21) to the required pressure of the hydraulic circuit.

4. The remote automated power clamp hydraulic system according to claim 1, characterized in that, The hydraulic circuit of the lifting cylinder (31) includes a fourth solenoid directional valve (32) and a two-way throttle speed control valve (33). The fourth electromagnetic reversing valve (32) is connected to the oil inlet circuit and the oil return circuit, and is used to control the movement of the lifting cylinder (31); The bidirectional throttling speed control valve (33) is connected between the fourth electromagnetic reversing valve (32) and the lifting cylinder (31). The bidirectional throttling speed control valve (33) is used to adjust the moving speed of the lifting cylinder (31).

5. The remote automated power clamp hydraulic system according to claim 4, characterized in that, The hydraulic circuit of the lifting cylinder (31) also includes a second hydraulic lock (34), which is connected between the fourth electromagnetic reversing valve (32) and the bidirectional throttle speed regulating valve (33). When the fourth electromagnetic reversing valve (32) is in the neutral position, the second hydraulic lock (34) locks the oil in the oil circuit between the lifting cylinder (31) and the second hydraulic lock (34), so that the lifting cylinder (31) remains stationary under load. When the fourth electromagnetic reversing valve (32) is in the left or right position, the second hydraulic lock (34) controls the oil inlet to open, so that the lifting cylinder (31) can move.

6. The remote automated power clamp hydraulic system according to claim 1, characterized in that, It also includes a control system for controlling the travel of the clamping cylinder (11), the rotary motor (12), the moving cylinder (21), and the lifting cylinder (31).

7. The remote automated power clamp hydraulic system according to claim 6, characterized in that, Pressure sensor (15) and pressure gauge (16) are provided on the hydraulic circuit of the clamping cylinder (11) and the rotary motor (12), and the pressure sensor (15) and the pressure gauge (16) are connected to the control system. After the pressure sensor (15) detects that the pipeline pressure has reached the preset value, the control system controls the first electromagnetic reversing valve (13) and the second electromagnetic reversing valve (14) to return to the neutral position, and the clamping cylinder (11) and the rotary motor (12) stop working.

8. A power clamp device, characterized in that, The remote automated power clamp hydraulic system according to any one of claims 1-6 includes: a sliding base frame (5), a frame body (6), a lifting mechanism (7), a power clamp (8), a drive device, and a control device. The power clamp (8) is suspended at the front end of the lifting mechanism (7), and the lifting mechanism (7) is slidably connected to the frame body (6). The power clamp (8) and the drive device are connected to the control device. The drive device includes a clamping cylinder (11) for controlling the power clamp jaws (81) to clamp the tubing, a rotary motor (12) for controlling the rotation of the power clamp jaws (81) to unscrew the tubing, a moving cylinder (21) for controlling the frame body (6) to move back and forth along the sliding base frame (5), and a lifting cylinder (31) for controlling the lifting mechanism (7) to lift up and down along the frame body (6).

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