Well logging winch electric control system with power winch and control method

Abstract

The invention discloses a logging winch electric control system with a power capstan, which comprises a main winch electric control system, a power capstan electric control system and a capstan electric control system which are connected through a cable, and the cable extends to a derrick through a ground pulley and finally reaches an oil well; the main winch electric control system achieves ultra-deep well logging operation through cooperative control with the power capstan electric control system and the capstan electric control system. The invention further discloses a method for controlling the logging winch by using the electronic control system. According to the electric control system, the electric control system of the logging winch with the power capstan is used for reducing the cable tension on the roller, and the cooperative control problem of the main winch and the power capstan in logging of reservoirs exceeding ten thousand meters is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of oilfield logging equipment, and specifically relates to an electric control system for a logging winch with a power winch. The present invention also relates to a method for controlling a logging winch using the above electric control system. Background Art

[0002] At present, the depth of oil and gas reservoirs developed in the Sichuan-Chongqing region and the Tarim Basin in China is 10,000 meters to 13,000 meters. The logging equipment at this depth faces the following problems: on the one hand, the current maximum operating depth of domestic logging equipment is only 9,000 meters, and the existing logging winches cannot meet the technical requirements of ultra-deep well logging; on the other hand, due to the excessive tension of the logging cable during ultra-deep well operations, not only will the cable be wound and squeezed layer by layer on the logging winch drum, causing damage to the logging cable, but also large stress will be generated on the side wall of the winch drum, resulting in the problem of winch drum fracture. Logging operations above 10,000 meters require high levels of tension control, torque control, linkage control, drum strength, drum rope capacity, system response, etc. Coupled with the more complex formation conditions above 10,000 meters, it poses a great challenge to the control system of ultra-deep well logging operations, making the difficulty of ultra-deep well logging operations very high. This requires the response of the electric control system of the logging winch to be more accurate and rapid. In response to this, the following improved technical solutions are proposed. Summary of the Invention

[0003] The purpose of the present invention is to provide an electric control system for a logging winch with a power winch, which reduces the cable tension on the drum by using the electric control system for a logging winch with a power winch, and solves the problem of coordinated control between the main winch and the power winch in ultra-deep well reservoir logging.

[0004] Another purpose of the present invention is to provide a method for controlling a logging winch using the above electric control system.

[0005] The technical solution adopted by the present invention is that the electric control system for a logging winch with a power winch includes a main winch electric control system, a power winch electric control system, and a winch electric control system. The three are connected through a cable. The cable extends to the derrick through a ground pulley and finally reaches the oil well. The main winch electric control system realizes ultra-deep well logging operations through coordinated control with the power winch electric control system and the winch electric control system.

[0006] The characteristics of the present invention also lie in:

[0007] The main winch electric control system is connected to the power winch electric control system through the main winch signal communication line. The power winch electric control system is connected to the winch electric control system through the power winch signal communication line. Switches are provided in all three systems to realize signal sharing among the three and transmit data to the touch screen for display.

[0008] The main winch electric control system includes:

[0009] The drum torque adjustment knob, connected to the valve group of the hydraulic system, is used to adjust the torque value of the whole system;

[0010] The power winch operation handle and the main winch operation handle, connected to the solenoid valve of the main winch auxiliary pump, control the current of the solenoid valve of the main winch auxiliary pump by adjusting the handle opening, and then control the flow of the oil pump swash plate;

[0011] The main winch ultra-low speed valve / auxiliary motor / oil circuit switching solenoid valve / PLC is switched to the auxiliary pump control. By connecting to the main winch main motor and the main winch auxiliary motor, the motor switching is achieved to control the system speed;

[0012] The Martindale speed encoder and the Martindale tension sensor, connected to the main winch touch screen, display the real-time speed and tension value on the screen. At the same time, the hoisting or lowering speed of the cable is adjusted through the main winch electric control system;

[0013] The control switch, connected to the corresponding components, is used to achieve different operation functions and corresponding actions.

[0014] The main winch electric control system also includes:

[0015] The UPS is used to supply power in time when the system suddenly loses power to prevent data loss;

[0016] The electro-hydraulic conversion solenoid valve is used to urgently switch to the hydraulic system control when the whole electric control system gets out of control, and the whole equipment is controlled by pure hydraulics;

[0017] The system air pressure sensor, connected to the air compressor, is used to monitor the air pressure value of the whole system to ensure the realization of functions such as brake oil injection;

[0018] The main pump oil replenishing pressure sensor a and the main hydraulic oil temperature sensor are used to timely feedback the real-time working value of the system and provide reliable data for normal operation.

[0019] The power winch electric control system includes:

[0020] The power winch touch screen, connected to the power winch main motor, the power winch auxiliary motor, the power winch auxiliary pump solenoid valve and the power winch ultra-low speed valve, realizes the speed control of the power winch;

[0021] The hydraulic oil temperature sensor and the main pump oil replenishing pressure sensor b are used to timely feedback the real-time working value of the power winch and provide reliable data for normal operation;

[0022] The flywheel solenoid valve, connected to the main winch electric control system and the power winch electric control system, is used to realize the situation where the main winch electric control system completes the operation alone and the power winch just passes the rope freely by opening the flywheel solenoid valve.

[0023] The winch electric control system includes:

[0024] An explosion-proof camera for collecting the working image of the power winch in real time;

[0025] A tension sensor for feeding back the tension of the wellhead cable.

[0026] Another technical solution adopted by the present invention is a control method for a logging winch with a power winch, which is divided into two working modes: automatic and manual. The automatic working mode is as follows: the main winch electric control system controls the cable to be lifted, the power winch electric control system is in an automatic following state, and the tension of the drum cable is kept constant to ensure that the cable tension value is within a safe range;

[0027] The manual working mode is as follows: the main winch is in a constant tension state, and the power winch electric control system controls the cable to be lifted.

[0028] Another feature of another technical solution of the present invention is:

[0029] The automatic working mode is specifically as follows:

[0030] Press the automatic mode touch key on the power winch touch screen to switch to the automatic mode of the power winch electric control system. The main winch operation handle controls the cable to be lifted. The power winch electric control system is in a follow-up state. The real-time tension value and speed value of the cable are collected through the Martindale tension sensor and the Martindale speed encoder, and the Martindale cable tension is kept at a certain tension to ensure that the cable tension value is within a safe range; the main winch electric control system sends control instructions, cable tension setting values, and the real-time tension and speed of the Martindale cable to the power winch electric control system and the winch electric control system through the main winch signal communication line and the power winch signal communication line. The power winch electric control system and the winch electric control system perform double closed-loop control on the output of the variable pump according to these data, so that the speed of the power winch electric control system and the winch electric control system follows the change of the Martindale speed encoder speed of the main winch electric control system, and the Martindale cable tension is maintained within the floating range allowed by the set target tension; the tension sensor feeds back the wellhead cable tension. When the wellhead cable tension exceeds the limit, the main winch electric control system starts the safety protection mechanism, and the power winch electric control system and the winch electric control system act accordingly.

[0031] The manual working mode is specifically as follows:

[0032] Press the manual mode touch key on the power winch touch screen to switch to the manual mode of the power winch electric control system. The power winch operation handle controls the cable to be lifted. Adjust the drum torque adjustment knob to an appropriate torque value to make the main winch electric control system maintain a certain torque of the reeling force. At the same time, the manual mode is divided into two modes: normal and ultra-low speed according to the lifting speed of the cable.

[0033] The normal mode is as follows: The output of the main pump motor of the power winch is controlled by operating the operating handle of the power winch. In the first half of the operating range of the operating handle of the power winch, the displacement of the variable pump is controlled from small to large. In the second half, while the displacement of the variable pump remains the largest, the displacement of the motor is controlled from large to small within the operating range.

[0034] The ultra-low speed mode is as follows: The running direction of the power winch is controlled by operating the operating handle of the power winch. The system automatically controls the displacement of the variable pump to the minimum displacement, and the motor does not participate in the variable control, so that the power winch reaches the ultra-low speed running state.

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

[0036] (1) In the electric control system of the present invention, the control mode of the power winch is divided into two modes: automatic and manual, which can realize the coordinated work of the main winch and the power winch, can generate static friction when the cable is wound around the winch drum in multiple layers, thereby sharing the corresponding load, and can avoid problems such as the inner layer of the cable on the winch drum being squeezed and damaged due to excessive tension and the drum deforming due to the overload of the main winch.

[0037] (2) The electric control system of the present invention realizes the speed selection control of normal and ultra-low speeds through the switching of the main motor and the auxiliary motor, meeting the requirements of various operating speeds.

[0038] (3) The electric control system of the present invention realizes data intercommunication and coordinated control through Ethernet communication, and through the PLC program calculation, realizes the rapid response of the power winch, ensures that the cable tension is within the safe range, minimizes the operation risk to the greatest extent, and improves the logging operation ability of ultra-deep wells.

[0039] (4) The electric control system of the present invention monitors key components such as cable winding and hydraulic components through an explosion-proof camera, monitors the operation of the system in real time to ensure its safe operation, or can watch the playback to accurately find the cause of system faults. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a layout schematic diagram of the electric control system of the present invention;

[0041] Figure 2 is a principle block diagram of the main winch electric control system in the electric control system of the present invention;

[0042] Figure 3 is a principle block diagram of the power winch electric control system in the electric control system of the present invention.

[0043] In the figure, 1. Main winch electric control system, 101. UPS, 102. Power winch touch screen, 103. Main winch touch screen, 104. Video display, 105. Drum torque adjustment knob, 106. Power winch operation handle, 107. Main winch operation handle, 108. Main winch video communication cable, 109. Main winch signal communication cable, 110. Electro-hydraulic conversion solenoid valve, 111. Main winch auxiliary pump solenoid valve, 112. Main winch ultra-low speed valve / auxiliary motor / oil circuit switching solenoid valve / PLC switches to auxiliary pump control, 113. Martindale speed encoder, 114. Martindale tension sensor, 115. System air pressure sensor, 116. Main pump oil replenishment pressure sensor a, 117. Main hydraulic oil temperature sensor, 118. Main winch main motor, 119. Main winch auxiliary motor, 120. Tank preheating, 121. Air compressor, 122. Control switch;

[0044] 2. Power winch electric control system, 201. Power winch video communication cable, 202. Power winch signal communication cable, 203. Power winch main motor, 204. Power winch auxiliary motor, 205. Hydraulic oil temperature sensor, 206. Power winch auxiliary pump solenoid valve, 207. Main pump oil replenishment pressure sensor b, 208. Power winch ultra-low speed valve, 209. Flywheel solenoid valve, 210. 220V power supply line, 211. Switch;

[0045] 3. Winch electric control system, 301. 12V power module, 302. Tension sensor, 303. Explosion-proof camera;

[0046] 4. Subsurface pulley, 5. Derrick, 6. Cable. Specific embodiments

[0047] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0048] Embodiment 1

[0049] The electric control system of the logging winch with a power winch according to the present invention has a structure as Figure 1 shown, including a main winch electric control system 1, a power winch electric control system 2, and a winch electric control system 3. The three are connected through a cable 6. The cable 6 extends to the derrick 5 through the subsurface pulley 4 and finally reaches the oil well. The main winch electric control system 1 realizes ultra-deep well logging operations by cooperating with the power winch electric control system 2 and the winch electric control system 3.

[0050] Embodiment 2

[0051] Based on Embodiment 1, the main winch electric control system 1 is connected to the power winch electric control system 2 through the main winch signal communication line 109. The power winch electric control system 2 is connected to the winch electric control system 3 through the power winch signal communication line 202. A switch 211 is provided in all three systems, and signal sharing among the three and data transmission to the touch screen for display are achieved through the switch 211.

[0052] Embodiment 3

[0053] The electric control system of the logging winch with a power winch according to the present invention has a structure as Figure 1 shown, including a main winch electric control system 1, a power winch electric control system 2, and a winch electric control system 3, which are connected to each other through a cable 6. The cable 6 extends to the derrick 5 through a ground pulley 4 and finally reaches the oil well. The main winch electric control system 1 realizes ultra-deep well logging operations by cooperating with the power winch electric control system 2 and the winch electric control system 3. During the lifting process of the winch, the cable 6 will be wound around the winch drum in multiple layers to generate static friction, thereby sharing the corresponding load on the drum and reducing the pressure of the cable on the winch drum.

[0054] The working mode of the power winch electric control system 2 is divided into two types: automatic and manual. The main winch electric control system 1 and the power winch electric control system 2 work together to achieve the automatic or manual operation logging mode of the power winch.

[0055] The automatic working mode of the power winch electric control system 2 is as follows: The main winch electric control system 1 controls the cable 6 to lift. The power winch electric control system 2 is in an automatic following state and keeps the tension of the drum cable constant (can be set) to ensure that the cable tension value is within the safe range.

[0056] The manual working mode of the power winch electric control system 2 is as follows: The main winch is in a constant tension state, and the power winch electric control system 2 controls the cable 6 to lift.

[0057] The winch electric control system 3 is used to monitor the cable tension and the working conditions of the power winch during the entire logging process.

[0058] As Figure 2 、 3 shown, the main winch electric control system 1, the power winch electric control system 2, and the winch electric control system 3 are connected through the main winch signal communication line 109 and the power winch signal communication line 202. A switch 211 is provided in all three systems, and signal sharing within each system and data transmission to the power winch touch screen 102 and the main winch touch screen 103 for display are achieved through the switch 211.

[0059] As Figure 2 shown, the components included in the main winch electric control system 1 and the functions of each component are as follows:

[0060] The UPS 101 is connected to the main winch electric control system 1 to ensure that the system supplies power in time when suddenly powered off to prevent data loss. The drum torque adjustment knob 105 is connected to the valve group of the hydraulic system to adjust the torque value of the whole system. The power winch operation handle 106 and the main winch operation handle 107 are connected to the main winch auxiliary pump solenoid valve 111. By adjusting the opening of the handle, the current of the main winch auxiliary pump solenoid valve 111 is controlled, and then the flow of the oil pump swash plate is controlled. The electro-hydraulic conversion solenoid valve 110 is connected to the main winch electric control system 1 to realize the emergency transfer to the hydraulic system control when the whole electric control system gets out of control, and the whole equipment is controlled by pure hydraulics. The main winch ultra-low speed valve / auxiliary motor / oil circuit switching solenoid valve / PLC switching to the auxiliary pump control 112 is connected to the main winch main motor 118 and the main winch auxiliary motor 119 to achieve the switching of the motors to control the system speed. The Martindale speed encoder 113 and the Martindale tension sensor 114 are connected to the main winch touch screen 103 to display the real-time speed and tension values on the screen. At the same time, the hoisting or lowering speed of the cable 6 is adjusted through the main winch electric control system 1. The system air pressure sensor 115 is connected to the air compressor 121 to monitor the air pressure value of the whole system and ensure the realization of functions such as brake oil injection. The main pump oil replenishment pressure sensor a 116 and the main hydraulic oil temperature sensor 117 are connected to the main winch electric control system 1 to timely feedback the real-time working values of the system and provide reliable data for normal operation. The control switch 122 is connected to the corresponding components to realize different operation functions and corresponding actions.

[0061] As Figure 3 shown, the components included in the power winch electric control system 2 and the functions of each component are as follows:

[0062] The power winch touch screen 102 is connected to the power winch main motor 203, the power winch auxiliary motor 204, the power winch auxiliary pump solenoid valve 206 and the power winch ultra-low speed valve 208 to realize the speed control of the power winch. The hydraulic oil temperature sensor 205 and the main pump oil replenishment pressure sensor b 207 are connected to the power winch electric control system 2 to timely feedback the real-time working values of the power winch and provide reliable data for normal operation. The flywheel solenoid valve 209 is connected to the main winch electric control system 1 and the power winch electric control system 2. By opening the flywheel solenoid valve 209, it is used to realize the situation where the main winch electric control system 1 completes the operation alone and the power winch just passes the rope freely.

[0063] As Figure 3 shown, the components included in the winch electric control system 3 and the functions of each component are as follows:

[0064] The explosion-proof camera 303 displays the picture in real time on the video monitor 104 through the main winch video communication line 108 and the power winch video communication line 201. The 12V power supply module 301 is connected to the tension sensor 302 for power supply. The 220V power cord 210 is connected to the winch electric control system 3 for power supply to the winch electric control system 3.

[0065] The working process of the electric control system of the logging winch of the present invention is as follows:

[0066] As Figure 2 and Figure 3 shown, after the main winch electric control system 1 and the power winch electric control system 2 are powered on, they are in the standby state, and all electrical components operate stably. Start the UPS 101 to ensure that sudden power failure of the power distribution system will not cause data loss. When the main hydraulic oil temperature sensor 117 feedback shows greater than 15°C on the main winch touch screen 103, and the hydraulic oil temperature sensor 205 feedback shows greater than 15°C on the winch touch screen 102, start running each system. The control switch 122 of the main winch electric control system 1 starts the main winch main motor 118 to operate, driving the main winch to work. Start the power winch main motor 203 on the power winch touch screen 102 to operate, driving the power winch to work. If the hydraulic oil temperature is lower than 15°C, start the fuel tank preheating 120 function through the control switch 122 to ensure stable operation of the system.

[0067] As Figure 2 and Figure 3 shown, press the automatic mode touch key on the power winch touch screen 102 to switch to the automatic mode of the power winch electric control system. The main winch operating handle 107 controls the cable 6 to lift. The power winch electric control system 2 is in the follow-up state. The real-time tension value and speed value of the cable 6 are collected through the Martin-Decker tension sensor 114 and the Martin-Decker speed encoder 113, and the Martin-Decker cable tension is maintained at a certain tension (can be set) to ensure that the cable tension value is within the safe range. The main winch electric control system 1 sends control commands, cable tension set values, and real-time tension and speed of the Martin-Decker cable to the power winch electric control system 2 and the winch electric control system 3 through the main winch signal communication line 109 and the power winch signal communication line 202 according to the main winch control state. The power winch electric control system 2 and the winch electric control system 3 perform double closed-loop control on the output of the variable pump according to these data, so that the speed of the power winch electric control system 2 and the winch electric control system 3 follows the speed change of the Martin-Decker speed encoder 113 of the main winch electric control system 1, and the Martin-Decker cable tension is maintained within the floating range allowed by the set target tension. The tension sensor 302 feeds back the wellhead cable tension. When the wellhead cable tension exceeds the limit, the main winch electric control system 1 starts the safety protection mechanism, and the power winch electric control system 2 and the winch electric control system 3 act accordingly.

[0068] As Figure 2 and Figure 3As shown, press the manual mode touch key on the power winch touch screen 102 to switch to the manual mode. Use the power winch operation handle 106 to control the cable 6 to lift up. Adjust the drum torque adjustment knob 105 to an appropriate torque value to make the main winch electric control system 1 maintain a certain torque of the rewinding force. At the same time, the manual mode is divided into two modes: normal and ultra-low speed. The normal mode is: control the output of the main pump motor of the power winch by operating the power winch operation handle 106. In the first half of the operation range of the power winch operation handle 106, control the displacement of the variable pump to increase from small to large. In the second half, while the displacement of the variable pump remains the largest, control the displacement of the motor to decrease from large to small in the operation range. The ultra-low speed mode is: control the running direction of the power winch by operating the power winch operation handle 106. The system automatically controls the displacement of the variable pump to the minimum displacement, and the motor does not participate in the variable control, so that the power winch reaches the ultra-low speed running state.

[0069] As Figure 2 and Figure 3 shown, the system collects each working pressure value through the main pump oil replenishing pressure sensor a116 and the main pump oil replenishing pressure sensor b207 and transmits it to the main winch touch screen 103 and the power winch touch screen 102. Observe whether each pressure value is normal at any time during the system operation to ensure the normal and stable operation of the system.

[0070] As Figure 2 shown, after the air compressor 121 is powered on, it generates air source to ensure the brake air source of the main winch system, and collects the system air pressure through the air pressure sensor 115 to see if the air pressure meets the requirements.

[0071] As Figure 2 shown, when the control switch 122 is turned to the ultra-low speed mode, the main winch ultra-low speed valve / auxiliary motor / oil circuit switching solenoid valve / PLC switching to the auxiliary pump control 112 are all started.

[0072] As Figure 2 shown, when a fault occurs in the main winch electric control system 1, the electro-hydraulic conversion solenoid valve 110 can be controlled to open through the control switch 122 to realize the pure hydraulic control of the whole system.

[0073] As Figure 3 shown, after the power winch electric control system 2 is powered on, the explosion-proof camera 303 works, and the working picture of the power winch is collected in real time to the video display 104. In case of an emergency, the emergency button can be pressed to stop the system operation, and the system can be restarted after the fault is checked.

Claims

1. Electric control system for a logging winch with a power winch, Characterized in that, It includes a main winch electric control system (1), a power winch electric control system (2) and a winch electric control system (3), which are connected to each other through a cable (6). The cable (6) extends to the derrick (5) through a ground pulley (4) and finally reaches the oil well. The main winch electric control system (1) realizes ultra-deep well logging operations through coordinated control with the power winch electric control system (2) and the winch electric control system (3).

2. The electric control system for a logging winch with a power winch according to claim 1, Characterized in that, The main winch electric control system (1) is connected to the power winch electric control system (2) through a main winch signal communication line (109). The power winch electric control system (2) is connected to the winch electric control system (3) through a power winch signal communication line (202). Switches (211) are provided in all three systems to realize signal sharing among the three and transmit data to the touch screen for display.

3. The electric control system for a logging winch with a power winch according to claim 2, Characterized in that, The main winch electric control system (1) includes: A drum torque adjustment knob (105), which is connected to the valve group of the hydraulic system to adjust the torque value of the whole system; A power winch operation handle (106) and a main winch operation handle (107), which are connected to the main winch auxiliary pump solenoid valve (111). By adjusting the handle opening, the current of the main winch auxiliary pump solenoid valve (111) is controlled, and then the flow of the oil pump swash plate is controlled; The main winch ultra-low speed valve / auxiliary motor / oil circuit switching solenoid valve / PLC is switched to auxiliary pump control (112), which is connected to the main winch main motor (118) and the main winch auxiliary motor (119) to achieve motor switching and control the system speed; A Martindale speed encoder (113) and a Martindale tension sensor (114), which are connected to the main winch touch screen (103) to display the real-time speed and tension values on the screen. At the same time, the up or down speed of the cable (6) is adjusted through the main winch electric control system (1); A control switch (122), which is connected to the corresponding components to realize different operation functions and corresponding actions.

4. The electric control system for a logging winch with a power winch according to claim 3, Characterized in that, The main winch electric control system (1) further includes: A UPS (101) for supplying power in time when the system suddenly loses power to prevent data loss; An electro-hydraulic conversion solenoid valve (110) for emergently switching to hydraulic system control in case of out-of-control of the whole electric control system, and the whole equipment is controlled by pure hydraulics; A system air pressure sensor (115), which is connected to an air compressor (121) to monitor the air pressure value of the whole system and ensure the realization of functions such as brake oil injection; A main pump oil replenishment pressure sensor a (116) and a main hydraulic oil temperature sensor (117) for timely feedback of the real-time working values of the system to provide reliable data for normal operation.

5. The electric control system for a logging winch with a power winch according to claim 3, Characterized in that, The power winch electric control system (2) includes: The power winch touch screen (102) is connected to the power winch main motor (203), the power winch auxiliary motor (204), the power winch auxiliary pump solenoid valve (206) and the power winch ultra-low speed valve (208) to achieve speed control of the power winch; The hydraulic oil temperature sensor (205) and the main pump make-up oil pressure sensor b (207) are used to timely feedback the real-time working values of the power winch and provide reliable data for normal operation; The flywheel solenoid valve (209) is connected to the main winch electric control system (1) and the power winch electric control system (2). By opening the flywheel solenoid valve (209), it is used to achieve the situation where the main winch electric control system (1) completes the operation alone and the power winch just freely passes the rope.

6. The logging winch electric control system with a power winch according to claim 5, characterized in that, the winch electric control system (3) includes: The explosion-proof camera (303) is used to collect the working picture of the power winch in real time; The tension sensor (302) is used to feedback the wellhead cable tension.

7. The control method of the logging winch with a power winch, using the logging winch electric control system according to claim 6, characterized in that, It is divided into two working modes: automatic and manual. Among them, the automatic working mode is: the main winch electric control system (1) controls the cable (6) to lift, the power winch electric control system (2) is in the automatic following state, and the tension of the drum cable is kept constant to ensure that the cable tension value is within the safe range; The manual working mode is: the main winch is in the constant tension state, and the power winch electric control system (2) controls the cable (6) to lift.

8. The control method of the logging winch with a power winch according to claim 7, characterized in that, the specific automatic working mode is: Press the automatic mode touch key of the power winch touch screen (102) to switch to the automatic mode of the power winch electric control system. The main winch operation handle (107) controls the cable (6) to lift. The power winch electric control system (2) is in the follow-up state. The real-time tension value and speed value of the cable (6) are collected through the Martindale tension sensor (114) and the Martindale speed encoder (113), and the Martindale cable tension is kept at a certain tension to ensure that the cable tension value is within the safe range; The main winch electric control system (1) sends control instructions, cable tension setting values, and the real-time tension and speed of the Martindale cable to the power winch electric control system (2) and the winch electric control system (3) through the main winch signal communication line (109) and the power winch signal communication line (202). The power winch electric control system (2) and the winch electric control system (3) perform double closed-loop control on the output of the variable pump according to these data, so that the speed of the power winch electric control system (2) and the winch electric control system (3) follows the change of the speed of the Martindale speed encoder (113) of the main winch electric control system (1), and the Martindale cable tension is maintained within the floating range allowed by the set target tension; The tension sensor (302) feedbacks the wellhead cable tension. When the wellhead cable tension exceeds the limit, the main winch electric control system (1) starts the safety protection mechanism, and the power winch electric control system (2) and the winch electric control system (3) act accordingly.

9. The logging winch control method with a powered winch according to claim 7, characterized in that, the manual working mode is specifically as follows: Press the manual mode touch key on the powered winch touch screen (102) to switch to the manual mode of the powered winch electric control system. Control the cable (6) to lift with the powered winch operation handle (106). Adjust the drum torque adjustment knob (105) to an appropriate torque value to make the main winch electric control system (1) maintain a certain torque of the rewinding force. At the same time, the manual mode is divided into two modes: normal and ultra-low speed according to the lifting speed of the cable (6).

10. The logging winch control method with a powered winch according to claim 9, characterized in that, the normal mode is: control the output of the main pump motor of the powered winch by operating the powered winch operation handle (106). In the first half of the operation range of the powered winch operation handle (106), control the displacement of the variable pump to increase from small to large. In the second half, while the displacement of the variable pump remains the maximum, control the displacement of the motor to decrease from large to small in the operation range; the ultra-low speed mode is: control the running direction of the powered winch by operating the powered winch operation handle (106). The system automatically controls the displacement of the variable pump to the minimum displacement, and the motor does not participate in the variable control, so that the powered winch reaches the ultra-low speed running state.

Images