A hydraulic control unit for a rapid disconnection device of an oilfield manifold

Abstract

The present invention discloses a hydraulic control unit for a quick disconnection device of an oilfield manifold, which includes a movable frame. Inside the movable frame, there are an oil tank, a filter pressure reducing valve, a ball valve, a pneumatic booster pump, a needle valve, an accumulator, an overflow valve and a quick connector. The air inlet of the filter pressure reducing valve is connected to an external air source port, and its air outlet is connected to the inlet of the ball valve. The outlet of the ball valve is connected to the air inlet of the pneumatic booster pump. The oil tank is connected to the oil inlet of the pneumatic booster pump through an oil pipe. The needle valve includes an accumulator needle valve, a locking needle valve, a disconnection needle valve, a locking pressure relief needle valve and a disconnection pressure relief needle valve. The quick connector includes a locking quick connector and a disconnection quick connector. The hydraulic system has a simple structure, remotely controls the locking and disconnection of the quick disconnection device by controlling the opening and closing of the needle valve, has good practical effects, and has a simple control method, which is conducive to popularization and use.

Description

Technical Field

[0001] The present invention relates to the field of oil drilling and production construction equipment, and particularly to a hydraulic control unit for a quick disconnection device of an oilfield manifold. Background Art

[0002] The working environment of oilfield on-site operation construction is harsh, and the fluid pressure in the high-pressure manifold between the equipment and the wellhead is high. In case of an emergency, it is necessary to quickly disconnect the manifold. Relying on manual disassembly takes a long time and has a high risk factor. Therefore, it is necessary to design a hydraulic device that can quickly and remotely control the disconnection of the manifold, reduce the burden on workers, and can be operated and run simply and reliably. Summary of the Invention

[0003] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a hydraulic control unit for a quick disconnection device of an oilfield manifold. The hydraulic system has a simple structure, and remotely controls the locking and disconnection of the quick disconnection device by controlling the opening and closing of needle valves. It has good practical effects, a simple control method, and is conducive to popularization and use.

[0004] To achieve the above technical purpose, the solution provided by the present invention is: a hydraulic control unit for a quick disconnection device of an oilfield manifold, including a movable frame. Inside the movable frame, there are an oil tank, a filter pressure reducing valve, a ball valve, a pneumatic booster pump, needle valves, an accumulator, a relief valve, and quick connectors. The air inlet of the filter pressure reducing valve is connected to an external air source port, and its air outlet is connected to the inlet of the ball valve. The outlet of the ball valve is connected to the air inlet of the pneumatic booster pump. The oil tank is connected to the oil inlet of the pneumatic booster pump through an oil pipe. The needle valves include an accumulator needle valve, a locking needle valve, a disconnection needle valve, a locking pressure relief needle valve, and a disconnection pressure relief needle valve. The quick connectors include a locking quick connector and a disconnection quick connector. The oil outlet of the pneumatic booster pump is connected to the accumulator needle valve, the locking needle valve, and the disconnection needle valve. The oil outlet of the accumulator is connected to the relief valve. The oil outlet of the relief valve is connected to the oil return port of the oil tank. The outlet of the locking needle valve is connected to the locking pressure relief needle valve and the locking quick connector. The outlet of the disconnection needle valve is connected to the disconnection pressure relief needle valve and the disconnection quick connector. The oil outlets of the locking pressure relief needle valve and the disconnection pressure relief needle valve are connected to the oil return port of the oil tank.

[0005] In the above technical solution, a manual oil pump is provided between the oil outlet of the pneumatic booster pump and the accumulator needle valve, and the oil return port of the manual oil pump is connected to the oil return port of the oil tank.

[0006] In the above technical solution, the pneumatic booster pump is a pneumatic high-pressure piston pump.

[0007] In the above technical solution, the filter pressure reducing valve includes a filter and a pressure reducing valve.

[0008] In the above technical solution, a pressure gauge is provided between the filter pressure reducing valve and the ball valve.

[0009] In the above technical solution, a pressure gauge is provided between the locking needle valve and the locking quick connector, and a pressure gauge is provided between the disconnecting needle valve and the disconnecting quick connector.

[0010] In the above technical solution, a pressure gauge is provided between the accumulator and the accumulator needle valve.

[0011] The beneficial effects of the present invention are as follows:

[0012] 1. The design of this hydraulic control unit is novel and has good use effects, and it can work in the harsh environment of an offshore platform.

[0013] 2. This hydraulic control unit can be remotely operated by a single person, improving work efficiency and reducing the risk of harm to the human body.

[0014] 3. This hydraulic control unit adopts a manual pump backup power design, ensuring emergency operation in case of emergency and improving the reliability of the equipment.

[0015] 4. This hydraulic control unit uses an accumulator for oil supply, and the pneumatic booster pump does not need to work continuously, extending the service life of the booster pump and saving the consumption of the gas source.

[0016] 5. This hydraulic control unit has a simple structure, saves time and effort, is easy to maintain, and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the present invention.

[0018] Wherein: 1 - fuel tank; 2 - filter pressure reducing valve; 3 - ball valve; 4 - pneumatic booster pump; 5 - manual oil pump; 6 - accumulator; 7 - overflow valve; 8 - accumulator needle valve; 9 - locking needle valve; 10 - locking pressure relief needle valve; 11 - disconnecting needle valve; 12 - disconnecting pressure relief needle valve; 13 - locking quick connector; 14 - disconnecting quick connector, 15 - movable frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0020] As Figure 1A hydraulic control unit for a quick-disconnect device of an oilfield manifold, including a movable frame 15. Inside the movable frame 15, there is an oil tank 1, a filter pressure-reducing valve 2, a ball valve 3, a pneumatic booster pump 4, a needle valve, an accumulator 6, a relief valve 7 and a quick connector. The air inlet of the filter pressure-reducing valve 2 is connected to an external air source port, and its air outlet is connected to the inlet of the ball valve 3. The outlet of the ball valve 3 is connected to the air inlet of the pneumatic booster pump 4. The oil tank 1 is connected to the oil inlet of the pneumatic booster pump 4 through an oil pipe. The needle valve includes an accumulator needle valve 8, a locking needle valve 9, a disconnecting needle valve 11, a locking pressure-relief needle valve 10, and a disconnecting pressure-relief needle valve 12. The quick connector includes a locking quick connector 13 and a disconnecting quick connector 14. The oil outlet of the pneumatic booster pump 4 is connected to the accumulator needle valve 8, the locking needle valve 9, and the disconnecting needle valve 11. The oil outlet of the accumulator 6 is connected to the relief valve 7. The oil outlet of the relief valve 7 is connected to the oil return port of the oil tank 1. The outlet of the locking needle valve 9 is connected to the locking pressure-relief needle valve 10 and the locking quick connector 13. The outlet of the disconnecting needle valve 11 is connected to the disconnecting pressure-relief needle valve 12 and the disconnecting quick connector 14. The oil outlets of the locking pressure-relief needle valve 10 and the disconnecting pressure-relief needle valve 12 are connected to the oil return port of the oil tank.

[0021] The accumulator 6 is used to provide the hydraulic power source for locking and releasing the quick-disconnect device, and the relief valve 7 is used to set the maximum working pressure of the system.

[0022] In the above technical solution, a manual oil pump 5 is provided between the oil outlet of the pneumatic booster pump 4 and the accumulator needle valve 8. The oil return port of the manual oil pump 4 is connected to the oil return port of the oil tank 1. The manual oil pump 5 realizes the function of providing emergency power when the accumulator fails or is damaged.

[0023] In the above technical solution, the pneumatic booster pump 4 is a pneumatic high-pressure piston pump.

[0024] In the above technical solution, the filter pressure-reducing valve 2 includes a filter and a pressure-reducing valve.

[0025] In the above technical solution, a pressure gauge is provided between the filter pressure-reducing valve 2 and the ball valve.

[0026] In the above technical solution, a pressure gauge is provided between the locking needle valve 9 and the locking quick connector 13, and a pressure gauge is provided between the disconnecting needle valve 11 and the disconnecting quick connector 14.

[0027] In the above technical solution, a pressure gauge is provided between the accumulator 6 and the accumulator needle valve 8.

[0028] The working principle of this embodiment is as follows: After connecting the external air source port and the two quick connector interfaces, compressed air reaches the air inlet of the pneumatic booster pump 4 after passing through the filter pressure reducing valve 2 and the ball valve 3. The pneumatic booster pump 4 starts to work under the action of compressed air. The oil suction port of the pneumatic booster pump 4 sucks oil from the oil tank 1, and the oil in the oil tank 1 enters the accumulator 6 through the accumulator needle valve 8 after being pressurized by the pneumatic booster pump 4. When the pressure of the accumulator reaches the set pressure value, the external air source is cut off through the ball valve 3, and the pneumatic booster pump 4 stops working. At this time, the accumulator 6 enters the working standby state, and the system pressure is set by the overflow valve 7. If the pneumatic booster pump 4 or the accumulator 6 fails to work properly, the manual oil pump 5 can be used as a backup hydraulic power source. The manual oil pump 5 is connected to the oil suction port of the oil tank 1, and the oil outlet of the manual oil pump 5 is connected to the oil outlet of the pneumatic booster pump 4.

[0029] When the locking needle valve 9 is in the open position and the locking pressure relief needle valve 10 is in the closed position, the pressurized oil at the outlet of the accumulator 6 passes through the locking needle valve 9 and the locking quick connector 13 and enters the locking oil inlet of the pipe string quick release device. At the same time, the hydraulic oil in the disconnect oil port of the quick release device returns to the oil tank through the disconnect quick connector 14 and the disconnect pressure relief needle valve 12. At this time, the disconnect needle valve 11 is in the closed position and the disconnect pressure relief needle valve 12 is in the open position. At this time, the pipe string quick release device is in the locked state.

[0030] When the disconnect needle valve 11 is in the open position and the disconnect pressure relief needle valve 12 is in the closed position, the pressurized oil at the outlet of the accumulator 6 passes through the disconnect needle valve 11 and the disconnect quick connector 14 and enters the disconnect oil inlet of the pipe string quick release device. At the same time, the hydraulic oil in the locking oil port of the quick release device returns to the oil tank through the locking quick connector 13 and the locking pressure relief needle valve 10. At this time, the locking needle valve 9 is in the closed position and the locking pressure relief needle valve 10 is in the open position. At this time, the pipe string quick release device is in the disconnected state.

[0031] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. A hydraulic control unit for a quick-disconnect device of an oilfield manifold, characterized in that: It includes a movable frame, within which there are an oil tank, a filter pressure reducing valve, a ball valve, a pneumatic booster pump, a needle valve, an accumulator, a relief valve and a quick connector. The air inlet of the filter pressure reducing valve is connected to an external air source port, and its air outlet is connected to the inlet of the ball valve. The outlet of the ball valve is connected to the air inlet of the pneumatic booster pump. The oil tank is connected to the oil inlet of the pneumatic booster pump through an oil pipe. The needle valve includes an accumulator needle valve, a locking needle valve, a disconnecting needle valve, a locking pressure relief needle valve and a disconnecting pressure relief needle valve. The quick connector includes a locking quick connector and a disconnecting quick connector. The oil outlet of the pneumatic booster pump is connected to the accumulator needle valve, the locking needle valve and the disconnecting needle valve. The oil outlet of the accumulator is connected to the relief valve, and the oil outlet of the relief valve is connected to the oil return port of the oil tank. The outlet of the locking needle valve is connected to the locking pressure relief needle valve and the locking quick connector. The outlet of the disconnecting needle valve is connected to the disconnecting pressure relief needle valve and the disconnecting quick connector. The oil outlets of the locking pressure relief needle valve and the disconnecting pressure relief needle valve are connected to the oil return port of the oil tank. A manual oil pump is provided between the oil outlet of the pneumatic booster pump and the accumulator needle valve, and the oil return port of the manual oil pump is connected to the oil return port of the oil tank. A pressure gauge is provided between the locking needle valve and the locking quick connector, and a pressure gauge is provided between the disconnecting needle valve and the disconnecting quick connector; When the locking needle valve is in the open position and the locking pressure relief needle valve is in the closed position, the pressure oil at the outlet of the accumulator enters the locking oil inlet of the pipe quick disconnect device through the locking needle valve and the locking quick connector. At the same time, the hydraulic oil in the disconnecting oil port of the quick disconnect device returns to the oil tank through the disconnecting quick connector and the disconnecting pressure relief needle valve. At this time, the disconnecting needle valve is in the closed position and the disconnecting pressure relief needle valve is in the open position, and the pipe quick disconnect device is in the locked state; When the disconnecting needle valve is in the open position and the disconnecting pressure relief needle valve is in the closed position, the pressure oil at the outlet of the accumulator enters the disconnecting oil inlet of the pipe quick disconnect device through the disconnecting needle valve and the disconnecting quick connector. At the same time, the hydraulic oil in the locking oil port of the quick disconnect device returns to the oil tank through the locking quick connector and the locking pressure relief needle valve. At this time, the locking needle valve is in the closed position and the locking pressure relief needle valve is in the open position, and the pipe quick disconnect device is in the disconnected state.

2. The hydraulic control unit for a quick-disconnect device of an oilfield manifold according to claim 1, characterized in that: The pneumatic booster pump is a pneumatic high-pressure piston pump.

3. The hydraulic control unit for a quick-disconnect device of an oilfield manifold according to claim 1, characterized in that: The filter pressure reducing valve includes a filter and a pressure reducing valve.

4. The hydraulic control unit for a quick-disconnect device of an oilfield manifold according to claim 1, characterized in that: A pressure gauge is provided between the filter pressure reducing valve and the ball valve.

5. The hydraulic control unit for a quick-disconnect device of an oilfield manifold according to claim 1, characterized in that: A pressure gauge is provided between the accumulator and the accumulator needle valve.

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