Double-pump cooperative driving well logging winch hydraulic transmission system

Abstract

The invention discloses a double-pump cooperative driving logging winch hydraulic transmission system which comprises an electric control system control unit, and the input end of the electric control system control unit is connected with a signal line of a cable tension sensor. The output end of the electric control system control unit is simultaneously connected with the electric control variable pump I, the electric control variable pump II, the hydraulic control valve bank and the electric control variable motor, the electric control variable pump I and the electric control variable pump II are respectively interconnected with the hydraulic control valve bank, and the other output end of the hydraulic control valve bank is connected with the electric control variable motor. According to the system, firstly, full coverage of high-speed and ultra-low-speed ranges of logging of a deep well exceeding ten thousand meters is achieved, and stable and reliable ultra-low-speed performance can be provided; and secondly, the oil supply pressure of the oil pump is adjusted through the electric proportional control valve, and automatic cooperative control over the logging winch and the power winch during logging operation of the deep well larger than ten thousand meters is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of oilfield logging control and relates to a double-pump cooperatively driven logging winch hydraulic transmission system. Background Art

[0002] Ultra-deep oil well logging has always been a difficult problem in oil field production, especially now that there are more and more ultra-deep wells over 10,000 meters in oil fields. The ultra-deep well logging cable is too long and requires a larger winch drum. The existing logging winch structure cannot meet the ultra-low speed working conditions during logging operations; the winch load and cable tension increase during ultra-deep oil well logging operations, which can easily lead to logging winch overload and premature damage to the inner layer cable of the logging winch drum due to compression.

[0003] To solve the above problem, some people have tried to set up an auxiliary power winch between the logging winch and the wellhead. However, since the system pressure regulation of the logging winch in the prior art is a mechanical hydraulic valve, it is impossible to achieve real-time automatic control and matching of the cable tension of the winch and the power winch during logging operations.

[0004] Therefore, it is urgent to develop a new winch hydraulic transmission system to solve the above-mentioned shortcomings. Summary of the invention

[0005] The purpose of the present invention is to provide a dual-pump cooperatively driven logging winch hydraulic transmission system, which solves the problem that the system pressure regulation of the logging winch in the prior art is a mechanical hydraulic valve component and cannot achieve real-time automatic control and matching of the cable tension of the winch and the power winch.

[0006] The technical solution adopted by the present invention is a dual-pump cooperatively driven logging winch hydraulic transmission system, including an electronic control system control unit, the input end of the electronic control system control unit is connected to the signal line of the cable tension sensor, and the output end of the electronic control system control unit is simultaneously connected to the electronically controlled variable pump 1, the electronically controlled variable pump 2, the hydraulic control valve group, and the electronically controlled variable motor. The electronically controlled variable pump 1 and the electronically controlled variable pump 2 are respectively interconnected with the hydraulic control valve group, and the other output end of the hydraulic control valve group is connected to the electronically controlled variable motor.

[0007] The double-pump cooperatively driven logging winch hydraulic transmission system of the present invention is also characterized in that:

[0008] The electronically controlled variable pump adopts a 125cc electronically controlled swash plate axial piston variable pump.

[0009] The second electronically controlled variable pump adopts a 28cc electronically controlled swash plate axial piston variable pump.

[0010] The electronically controlled variable motor uses a 115cc electronically controlled bent-axis axial piston variable motor.

[0011] The control functions of the hydraulic control valve group include ultra-low speed mode selection of the logging winch, switching of the main oil circuit of the dual pumps, and oil pump pressure regulation.

[0012] The specific internal structure of the hydraulic control valve group is: including the oil channel switching control solenoid valve, the oil channel switching hydraulic control valve 1, and the oil channel switching hydraulic control valve 2. The electromagnetic pressure relief ends of the oil channel switching control solenoid valve, the oil channel switching hydraulic control valve 1, and the oil channel switching hydraulic control valve 2 are connected to the L port; the control oil port of the oil channel switching control solenoid valve is the P port, and the control oil output end of the oil channel switching control solenoid valve is connected to the oil channel switching hydraulic control valve 1 and the oil channel switching hydraulic control valve 2 at the same time; the B1 port of the oil channel switching hydraulic control valve 1 and the A1 port of the oil channel switching hydraulic control valve 2 are both connected to the electronically controlled variable pump 1; the oil channel switching hydraulic control valve 1 is connected to the oil channel switching hydraulic control valve 2. The B2 port of the oil channel switching hydraulic control valve 1 and the A2 port of the oil channel switching hydraulic control valve 2 are both connected to the electronically controlled variable pump 2. A main oil circuit back pressure valve is arranged on the pipeline between the A2 port of the oil channel switching hydraulic control valve 2 and the electronically controlled variable pump 2. The main oil circuit back pressure valve is connected in parallel with an oil circuit selection check valve. The main oil circuit back pressure valve is also connected in parallel with an ultra-low speed solenoid valve. The B port of the oil channel switching hydraulic control valve 1 and the A port of the oil channel switching hydraulic control valve 2 are both connected to the electronically controlled variable motor. The B port of the oil channel switching hydraulic control valve 1 is provided with a pressure measuring oil port T19, and the A port of the oil channel switching hydraulic control valve 2 is provided with a pressure measuring oil port T20.

[0013] In addition, one end of the oil pump pressure regulating proportional solenoid valve is connected to the Ma port, which is then connected to the pressure oil port of the electronically controlled variable pump one or the electronically controlled variable pump two, and one of them is connected according to the working mode; one end of the oil pump pressure regulating proportional solenoid valve is connected to the X4 port, which is then connected to the feedback oil port of the electronically controlled variable pump one or the electronically controlled variable pump two, and one of them is connected according to the working mode; the X4 port is also connected to the return oil port T through the feedback oil circuit safety valve.

[0014] The beneficial effects of the present invention are: first, it achieves full coverage of the high-speed and ultra-low-speed ranges of deep well logging exceeding 10,000 meters, and can provide stable and reliable ultra-low-speed performance; second, the oil supply pressure of the oil pump is adjusted by the electric proportional control valve to achieve automatic coordinated control of the logging winch and the power winch during deep well logging operations exceeding 10,000 meters. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a control flow diagram of the hydraulic transmission system of the well logging winch of the present invention;

[0016] Figure 2 It is a structural principle diagram of a hydraulic control valve group in a hydraulic transmission system of a well logging winch of the present invention.

[0017] In the figure, 1. Electronically controlled variable pump 1, 2. Electronically controlled variable pump 2, 3. Hydraulic control valve group, 4. Electronically controlled variable motor, 5. Electronic control system control unit, 6. Cable tension sensor, 7. Oil channel switching control solenoid valve, 8. Oil channel switching hydraulic control valve 1, 9. Oil channel switching hydraulic control valve 2, 10. Ultra-low speed solenoid valve, 11. Oil pump pressure regulation proportional solenoid valve, 12. Feedback oil circuit safety valve, 13. Oil circuit selection one-way valve, 14. Main oil circuit back pressure valve. DETAILED DESCRIPTION

[0018] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Reference Figure 1 The structure of the double-pump cooperatively driven logging winch hydraulic transmission system of the present invention is to include an electronic control system control unit 5, the input end of the electronic control system control unit 5 is connected to the signal line of the cable tension sensor 6, the output end of the electronic control system control unit 5 is simultaneously connected to the electronically controlled variable pump 1, the electronically controlled variable pump 2, the hydraulic control valve group 3, and the electronically controlled variable motor 4, the electronically controlled variable pump 1 and the electronically controlled variable pump 2 are respectively interconnected with the hydraulic control valve group 3, and the other output end of the hydraulic control valve group 3 is connected to the electronically controlled variable motor 4.

[0020] The electronically controlled variable pump 1 adopts a 125cc electronically controlled swash plate type axial piston variable pump; the electronically controlled variable pump 2 adopts a 28cc electronically controlled swash plate type axial piston variable pump; the electronically controlled variable motor 4 adopts a 115cc electronically controlled bent axis type axial piston variable motor; the control functions of the hydraulic control valve group 3 include ultra-low speed mode selection of the logging winch, switching of the main oil circuit of the dual pumps, and oil pump pressure regulation.

[0021] Reference Figure 2The specific internal structure of the hydraulic control valve group 3 is as follows: it includes an oil channel switching control solenoid valve 7, an oil channel switching hydraulic control valve 1 8, and an oil channel switching hydraulic control valve 2 9. The electromagnetic pressure relief ends of the oil channel switching control solenoid valve 7, the oil channel switching hydraulic control valve 1 8, and the oil channel switching hydraulic control valve 2 9 are connected to the L port; the control oil port of the oil channel switching control solenoid valve 7 is the P port, and the control oil output end of the oil channel switching control solenoid valve 7 is connected to the oil channel switching hydraulic control valve 1 8 and the oil channel switching hydraulic control valve 2 9 at the same time; the B1 port of the oil channel switching hydraulic control valve 1 8 and the A1 port of the oil channel switching hydraulic control valve 2 9 are both connected to the electronically controlled variable pump 1; the oil channel switching hydraulic control valve The B2 port of the valve 18 and the A2 port of the oil channel switching hydraulic control valve 29 are both connected to the electronically controlled variable pump 22. A main oil circuit back pressure valve 14 is provided on the pipeline between the A2 port of the oil channel switching hydraulic control valve 29 and the electronically controlled variable pump 22. The main oil circuit back pressure valve 14 is connected in parallel with an oil circuit selection check valve 13. The main oil circuit back pressure valve 14 is also connected in parallel with an ultra-low speed solenoid valve 10. The B port of the oil channel switching hydraulic control valve 18 and the A port of the oil channel switching hydraulic control valve 29 are both connected to the electronically controlled variable motor 4. The B port of the oil channel switching hydraulic control valve 18 is provided with a pressure measuring oil port T19, and the A port of the oil channel switching hydraulic control valve 29 is provided with a pressure measuring oil port T20.

[0022] One end of the oil pump pressure regulating proportional solenoid valve 11 is connected to the Ma port, which is then connected to the pressure oil port of the electronically controlled variable pump 1 or the electronically controlled variable pump 2, and one of them is connected according to the working mode; one end of the oil pump pressure regulating proportional solenoid valve 11 is connected to the X4 port, which is then connected to the feedback oil port of the electronically controlled variable pump 1 or the electronically controlled variable pump 2, and one of them is connected according to the working mode; the X4 port is also connected to the return oil port T after passing through the feedback oil circuit safety valve 12.

[0023] Figure 2 In the figure, the dotted line represents the control oil, which is used to select the start-up of the electronically controlled variable pump 1 or the electronically controlled variable pump 2.

[0024] The oil channel switching control solenoid valve 7, the oil channel switching hydraulic control valve 1 8, and the oil channel switching hydraulic control valve 2 9 realize the oil channel switching under ultra-low speed conditions; the ultra-low speed solenoid valve 10 realizes the ultra-low speed mode of the hydraulic control valve group; the oil pump pressure adjustment proportional solenoid valve 11 receives the command of the electronic control system control unit 5 and adjusts the pump end pressure in real time to ensure the automated coordinated control of the logging winch and the power winch.

[0025] The feedback oil circuit safety valve 12, the oil circuit selection check valve 13 and the main oil circuit back pressure valve 14 are all solid components and do not directly participate in the automated coordinated control. The oil pump pressure regulating proportional solenoid valve 11 and the feedback oil circuit safety valve 12 are collectively referred to as a combination valve group, which is connected to the electronically controlled variable pump 1 and the electronically controlled variable pump 2 to participate in the system pressure regulation control (i.e., when the electronically controlled variable pump 1 is selected as the working condition, the combination valve acts on the pressure regulation of the electronically controlled variable pump 1; when the electronically controlled variable pump 2 is selected as the working condition, the combination valve acts on the pressure regulation of the electronically controlled variable pump 2).

[0026] The pressure control range of the oil pump pressure regulating proportional solenoid valve 11 is 1.05-35MPa, the control pressure of the feedback oil circuit safety valve 12 is 4MPa, and the control pressure of the main oil circuit back pressure valve 14 is 7MPa.

[0027] The working principle of the present invention is:

[0028] The electronic control system control unit 5 collects the detection signal of the cable tension sensor 6 and calculates it to control the oil pump pressure regulating proportional solenoid valve 11 in the hydraulic control valve group 3 to adjust the oil pump supply pressure to ensure that the cable tension value of the logging winch and the power winch is within a reasonable range; when the line speed becomes faster or slower during the operation, the electronic control system control unit 5 controls the adjustment function of the oil pump pressure regulating proportional solenoid valve 11 in the hydraulic control valve group 3 to control the cable tension value in real time, so as to realize the automatic coordinated control of the logging winch and the power winch during the logging operation;

[0029] The electronic control system control unit 5 issues an electronic control command to control the electronically controlled variable pump 1 or the electronically controlled variable pump 2 to provide a hydraulic source, and at the same time controls the oil channel switching control solenoid valve 7 and two oil channel switching hydraulic control valves (oil channel switching hydraulic control valve 1 8 and oil channel switching hydraulic control valve 2 9) in the hydraulic control valve group 3 to switch the corresponding oil pump supply oil channel, and drive the electronically controlled variable motor 4 to rotate; according to the cable line speed requirements, the logging winch can provide three speed options: ultra-low speed, medium speed and high speed;

[0030] Among them, in the ultra-low speed mode, the electronic control system control unit 5 starts the electronically controlled variable pump 2 to provide the system with a hydraulic source, and at the same time, the oil channel switching control solenoid valve 7 and two oil channel switching hydraulic control valves (oil channel switching hydraulic control valve 1 8 and oil channel switching hydraulic control valve 2 9) in the hydraulic control valve group 3 switch the oil supply channel and control the ultra-low speed solenoid valve 10 to start the ultra-low speed hydraulic mode, and control the cable line speed in real time to achieve stable ultra-low speed logging requirements;

[0031] In the medium speed and high speed modes, the electronic control system control unit 5 starts the electronically controlled variable pump 1 to provide hydraulic source for the system. At the same time, the oil channel switching control solenoid valve 7 and two oil channel switching hydraulic control valves (oil channel switching hydraulic control valve 1 8 and oil channel switching hydraulic control valve 2 9) in the hydraulic control valve group 3 switch the oil supply channel, and control the displacement of the electronically controlled variable motor 4 in real time according to the speed requirement, and control the cable line speed in real time to ensure a wider range of logging speeds.

[0032] During the above control process, the electronic control system control unit 5 collects the linear speed signal from the cable tension sensor 6 or the external input, and the control system selects the ultra-low speed, medium speed or high speed gear according to the linear speed requirement during the logging operation, and controls the system of the present invention to the automatic mode after calculation; the system of the present invention can also directly manually operate the hardware configuration of the electronic control system control unit 5 to realize the operation of the dual-pump cooperatively driven logging winch hydraulic transmission system in manual mode.

[0033] Example 1

[0034] The field test was conducted using the automated ultra-low speed mode of the system of the present invention, and the recorded data are as follows:

[0035] The cable tension setting value range is any value between 20-40KN. The electronic control system control unit 5 controls the electronically controlled variable pump 2 to adjust the linear speed of the logging winch within the range of 20-170m / h, and the ultra-low speed stability is reliable; the electronic control system control unit 5 controls the ultra-low speed solenoid valve 10 and the oil pump pressure regulating proportional solenoid valve 11 in the hydraulic control valve group 3 to ensure that the detection value of the cable tension sensor 6 is basically consistent with the cable tension setting value, with an error range of less than 1%, and when the linear speed of the logging winch changes, the real-time adjustment response time of the cable tension is about 15ms, thereby realizing the automated coordinated control of the logging winch and the power winch.

[0036] Example 2

[0037] The field test was carried out using the automated medium-speed mode of the system of the present invention, and the recorded data are as follows:

[0038] The cable tension setting value range is any value between 20-40KN. The electronic control system control unit 5 controls the electronically controlled variable pump 1 to adjust the logging winch line speed within the range of 170-3200m / h. The electronic control system control unit 5 controls the oil pump pressure regulating proportional solenoid valve 11 in the hydraulic control valve group 3 to ensure that the detection value of the cable tension sensor 6 is basically consistent with the cable tension setting value, with an error range of less than 1%, and when the logging winch line speed changes, the cable tension real-time adjustment response time is about 15ms, thereby realizing the automated coordinated control of the logging winch and the power winch.

[0039] Example 3

[0040] The field test was carried out using the automated high-speed mode of the system of the present invention, and the recorded data are as follows:

[0041] The cable tension setting value range is any value between 20-40KN. The electronic control system control unit 5 controls the electronically controlled variable pump 1 and the electronically controlled variable motor 4 to achieve arbitrary adjustment of the logging winch line speed within the range of 3200-6000m / h; the electronic control system control unit 5 controls the oil pump pressure adjustment proportional solenoid valve 11 in the hydraulic control valve group 3 to achieve that the detection value of the cable tension sensor 6 is basically consistent with the cable tension setting value, with an error range of less than 1%. When the logging winch line speed changes, the cable tension real-time adjustment response time is about 20ms, thereby realizing the automated coordinated control of the logging winch and the power winch.

[0042] It can be seen that the dual-pump cooperatively driven logging winch hydraulic transmission system of the present invention can achieve full coverage of the high-speed and ultra-low speed ranges of deep well logging exceeding 10,000 meters, and provide stable and reliable ultra-low speed performance; and, by adjusting the oil supply pressure of the oil pump through the electric proportional control valve, automatic cooperative control of the logging winch and the power winch can be achieved during deep well logging operations exceeding 10,000 meters.

Claims

1. A double-pump cooperatively driven logging winch hydraulic transmission system, characterized in that: The invention comprises an electronic control system control unit (5), wherein the input end of the electronic control system control unit (5) is connected to the signal line of the cable tension sensor (6), and the output end of the electronic control system control unit (5) is simultaneously connected to an electronically controlled variable pump 1 (1), an electronically controlled variable pump 2 (2), a hydraulic control valve group (3), and an electronically controlled variable motor (4); the electronically controlled variable pump 1 (1) and the electronically controlled variable pump 2 (2) are respectively interconnected with the hydraulic control valve group (3), and the other output end of the hydraulic control valve group (3) is connected to the electronically controlled variable motor (4).

2. The double-pump cooperatively driven logging winch hydraulic transmission system according to claim 1 is characterized in that: The electronically controlled variable displacement pump 1 (1) is a 125cc electronically controlled swash plate type axial piston variable displacement pump.

3. The double-pump cooperatively driven logging winch hydraulic transmission system according to claim 1 is characterized in that: The electronically controlled variable pump 2 (2) is a 28cc electronically controlled swash plate type axial piston variable pump.

4. The double-pump cooperatively driven logging winch hydraulic transmission system according to claim 1 is characterized in that: The electronically controlled variable motor (4) is a 115cc electronically controlled bent-axis axial piston variable motor.

5. The double-pump cooperatively driven logging winch hydraulic transmission system according to claim 1 is characterized in that: The control functions of the hydraulic control valve group (3) include ultra-low speed mode selection of the logging winch, switching of the main oil circuits of the dual pumps, and oil pump pressure regulation.

6. The double-pump cooperatively driven logging winch hydraulic transmission system according to claim 5 is characterized in that: The specific internal structure of the hydraulic control valve group (3) is as follows: it includes an oil channel switching control electromagnetic valve (7), an oil channel switching hydraulic control valve 1 (8), and an oil channel switching hydraulic control valve 2 (9); the electromagnetic pressure relief ends of the oil channel switching control electromagnetic valve (7), the oil channel switching hydraulic control valve 1 (8), and the oil channel switching hydraulic control valve 2 (9) are connected to the L port; the control oil port of the oil channel switching control electromagnetic valve (7) is the P port, and the control oil output end of the oil channel switching control electromagnetic valve (7) is connected to the oil channel switching hydraulic control valve 1 (8) and the oil channel switching hydraulic control valve 2 (9) at the same time; the B1 port of the oil channel switching hydraulic control valve 1 (8) and the A1 port of the oil channel switching hydraulic control valve 2 (9) are both connected to the electric variable pump 1 (1); the oil channel switching hydraulic control valve 1 (8) and the A2 port of the oil channel switching hydraulic control valve 2 (9) are connected to the electric variable pump 1 (1); the oil channel switching hydraulic control valve 1 (8) and the A3 port of the oil channel switching hydraulic control valve 2 (9) are connected to the electric variable pump 1 (1); the oil channel switching hydraulic control valve 1 (8) and the A4 port of the oil channel switching hydraulic control valve 2 (9) are connected to the electric variable pump 1 (1); the oil channel switching hydraulic control valve 1 (8) and the A2 port of the oil channel switching hydraulic control valve 2 (9) are connected to the electric variable pump 1 (1); the oil channel switching hydraulic control valve 1 (8) and the A1 ... The B2 port of the valve 1 (8) and the A2 port of the oil channel switching hydraulic control valve 2 (9) are both connected to the electric variable pump 2 (2); a main oil circuit back pressure valve (14) is provided on the pipeline between the A2 port of the oil channel switching hydraulic control valve 2 (9) and the electric variable pump 2 (2); the main oil circuit back pressure valve (14) is connected in parallel with an oil circuit selection check valve (13); the main oil circuit back pressure valve (14) is also connected in parallel with an ultra-low speed solenoid valve (10); the B port of the oil channel switching hydraulic control valve 1 (8) and the A port of the oil channel switching hydraulic control valve 2 (9) are both connected to the electric variable motor (4); the B port of the oil channel switching hydraulic control valve 1 (8) is provided with a pressure measuring oil port T19, and the A port of the oil channel switching hydraulic control valve 2 (9) is provided with a pressure measuring oil port T20; In addition, one end of the oil pump pressure regulating proportional solenoid valve (11) is connected to the Ma port, which is then connected to the pressure oil port of the electric variable pump 1 (1) or the electric variable pump 2 (2), and one of them is connected according to the working mode; one end of the oil pump pressure regulating proportional solenoid valve (11) is connected to the X4 port, which is then connected to the feedback oil port of the electric variable pump 1 (1) or the electric variable pump 2 (2), and one of them is connected according to the working mode; the X4 port is also connected to the return oil port T through the feedback oil circuit safety valve (12).

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