A kind of mobile marine drilling and workover rig spare hydraulic station

Abstract

The present invention provides a portable marine drilling and workover rig standby hydraulic station, comprising an air filter, an oil supply filter, an oil return filter, an oil tank, a motor, a coupling, a hydraulic pump, a relief valve, a pressure switch, an oil supply check valve, a manual proportional compound valve, a balance valve, a brake valve group and a synchronization valve. When the original workover rig hydraulic oil pump or combined hydraulic station fails and cannot be repaired in a short time, the portable workover rig hydraulic station can immediately replace the failed hydraulic station and provide a hydraulic source that meets the use conditions of the actuator.

Description

Technical Field

[0001] The present invention relates to the technical field of petrochemical industry, and more specifically, to a movable marine drilling and workover rig standby hydraulic station. Background Art

[0002] During the operation of offshore workover rigs, the transmission of hydraulic winches, the movement of workover rigs, the lifting of derricks, the operation of hydraulic catheads and hydraulic tongs, blowout preventer lifting and moving devices, etc., all rely on the conventional power provided by the hydraulic system. As the most important component of the workover rig, the failure rate of the hydraulic power system has increased year by year with the increase in conventional workover, major workover and adjustment well operations. It is impossible to ensure that the operation is completed on time and in quantity.

[0003] At present, the marine workover rigs in the Bohai Sea area are divided into two power modes: mechanical drive and electric drive. The hydraulic power system of the mechanical drive workover rig is powered by a diesel engine driving the oil pump; the electric drive workover rig is equipped with an independent hydraulic station, which uses a 380V motor to drive the liquid pump to provide the power source. Under long-term operation, the internal seals, center springs, variable mechanisms, oil distribution plates, etc. of the hydraulic oil pump will be damaged to varying degrees. In addition, the power source that drives it will also have various faults. Due to space limitations and long maintenance hours, if the spare parts are imported, the time for replacing spare parts and repairing equipment will be greatly extended, resulting in the stoppage of the workover rig and even major safety accidents.

[0004] Therefore, there is an urgent need in the prior art for a hydraulic station with a simple structure, easy to move, which can fully provide the power source required for the operation when the hydraulic station originally equipped with the offshore well repair rig fails or cannot achieve the purpose of use, and can be relocated to any platform at any time. Summary of the invention

[0005] In view of the above problems, the present invention provides a movable marine drilling and workover rig backup hydraulic station.

[0006] To achieve the above object, the present invention is implemented through the following technical solutions:

[0007] A mobile marine drilling and workover rig standby hydraulic station comprises an air filter, an oil supply filter, an oil return filter, an oil tank, a motor, a coupling, a hydraulic pump, a relief valve, a pressure switch, an oil supply check valve, a manual proportional compound valve, a balancing valve, a brake valve group and a synchronization valve. The air filter, the oil supply filter and the oil return filter are all arranged on the oil tank. The oil tank is also provided with a liquid level gauge. The oil supply filter is connected to the oil supply pipeline, the oil return filter is connected to the oil return pipeline, the hydraulic pump, the relief valve, the pressure switch and the oil supply check valve are arranged on the oil supply pipeline in sequence; the manual proportional compound valve is a four-way reversing valve, the C1 port of the manual proportional compound valve is connected to the oil supply pipeline, the The C2 port is connected to the oil return pipeline, the C3 port of the manual proportional compound valve is connected to the E1 port of the balancing valve, and the C4 port of the manual proportional compound valve is connected to the E3 port of the balancing valve, the third port B1, the fourth port B2 and the N2 port of the brake valve group; the E2 port of the balancing valve is connected to the synchronization valve, the N1 port of the brake valve group and the oil drain port A, and the synchronization valve is also connected to the first port A1 and the second port A2; the part of the oil supply pipeline located between the hydraulic pump and the oil supply check valve is respectively connected to the inlet of the overflow valve and the pressure switch, and the outlet of the overflow valve is connected to the oil return pipeline; the pressure switch is connected to a pressure gauge; the hydraulic pump is connected to the coupling, and the coupling is connected to the motor.

[0008] The brake valve group includes four one-way valves, namely, D1 valve, D2 valve, D3 valve and D4 valve. The D1 valve is arranged in the opposite direction to the D2 valve, and the D3 valve is arranged in the opposite direction to the D4 valve. The outlet of the D1 valve and the inlet of the D3 valve are both connected to the N1 port, and the outlet of the D2 valve and the inlet of the D4 valve are both connected to the N2 port. The pipeline connecting the inlet of the D1 valve and the inlet of the D2 valve and the pipeline connecting the outlet of the D3 valve and the outlet of the D4 valve are connected through a connecting pipeline, and a control switch is arranged on the connecting pipeline.

[0009] The balancing valve is an externally controlled one-way sequence valve.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: when the original hydraulic oil pump or combined hydraulic station of the well repair rig fails and cannot be repaired in a short time, the movable well repair rig hydraulic station can immediately replace the failed hydraulic station and provide a hydraulic source that meets the use conditions of the actuator. It can also provide a hydraulic power source when the new equipment is not debugged, and move to avoid drilling ship operations; at the same time, it can realize pressure testing and functional testing of hydraulic equipment such as hydraulic tongs and hydraulic cylinders after on-site maintenance; in addition, it can provide additional power output. After the well repair rig is added with new hydraulic equipment, when the original configuration hydraulic oil pump or hydraulic station cannot meet the additional power requirements, it can provide additional power output. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the hydraulic station. DETAILED DESCRIPTION

[0012] The present invention will be further described below based on specific implementation methods.

[0013] like Figure 1 The portable marine drilling and workover rig standby hydraulic station shown in the figure comprises an air filter 2, an oil supply filter 3, an oil return filter 4, an oil tank 5, a motor 6, a coupling 7, a hydraulic pump 8, a relief valve 9, a pressure switch 10, an oil supply check valve 12, a manual proportional compound valve 13, a balancing valve 14, a brake valve group 15 and a synchronization valve 16. The air filter 2, the oil supply filter 3 and the oil return filter 4 are all arranged on the oil tank 5, and a liquid level gauge 1 is also arranged on the oil tank 5. The oil supply filter 3 is connected to the oil supply pipeline, and the oil return filter 4 is connected to the oil return pipeline. The hydraulic pump 8, the relief valve 9, the pressure switch 10 and the oil supply check valve 12 are arranged on the oil supply pipeline in sequence; The manual proportional compound valve 13 is a four-way reversing valve, the C1 port of the manual proportional compound valve 13 is connected to the oil supply pipeline, the C2 port of the manual proportional compound valve 13 is connected to the oil return pipeline, the C3 port of the manual proportional compound valve 13 is connected to the E1 port of the balancing valve 14, the C4 port of the manual proportional compound valve 13 is connected to the E3 port of the balancing valve 14, the third interface B1, the fourth interface B2 and the N2 port of the brake valve group 15; the E2 port of the balancing valve 14 is connected to the synchronization valve 16, the N1 port of the brake valve group 15 and the oil drain interface A, the balancing valve 14 is an externally controlled one-way sequential valve, the flow direction of the oil at the E1 and E2 ports is adjustable, and whether the E3 port is open can also be controlled. The brake valve group 15 includes four one-way valves, namely, D1 valve, D2 valve, D3 valve and D4 valve. The D1 valve is arranged in the opposite direction to the D2 valve, and the D3 valve is arranged in the opposite direction to the D4 valve. The outlet of the D1 valve and the inlet of the D3 valve are both connected to the N1 port, and the outlet of the D2 valve and the inlet of the D4 valve are both connected to the N2 port. The pipeline connecting the inlet of the D1 valve and the inlet of the D2 valve and the pipeline connecting the outlet of the D3 valve and the outlet of the D4 valve are connected through a connecting pipeline, and a control switch is arranged on the connecting pipeline. The synchronous valve 16 is also connected to the first interface A1 and the second interface A2; the part of the oil supply pipeline between the hydraulic pump 8 and the oil supply one-way valve 12 is respectively connected to the inlet of the overflow valve 9 and the pressure switch 10, and the outlet of the overflow valve 9 is connected to the oil return pipeline; the pressure switch 10 is connected to a pressure gauge 11; the hydraulic pump 8 is connected to the coupling 7, and the coupling 7 is connected to the motor 6.

[0014] The starting motor 6 drives the hydraulic pump 8. The oil in the oil tank 5 is filtered by the oil supply filter 3 and supplied to the oil supply pipeline. The oil passes through the oil supply check valve 12 and enters the C1 port of the manual proportional compound valve 13.

[0015] When the hydraulic station is in the forward oil supply working state, the first interface A1 and the second interface A2 are used as oil supply interfaces, the third interface B1 and the fourth interface B2 are used as oil return interfaces, and the manual proportional compound valve 13 is adjusted to make the oil entering the C1 port flow out through the C3 port and enter the balance valve 14. At this time, the oil drain interface A is in a closed state, and the E3 port is in an open state. The oil flows out through the E2 port and enters the synchronous valve 16, and finally enters the first interface A1 and the second interface A2 synchronously for oil supply; part of the oil flows out through the E3 port, returns to the manual proportional compound valve 13 through the C4 port, and enters the oil return pipeline; at the same time, the return oil passes through the third interface B1 and the fourth interface B2, directly enters the C4 port of the manual proportional compound valve 13, and then flows into the oil return pipeline through the C2 port, is filtered by the return oil filter 4, and returns to the oil tank 5.

[0016] When the hydraulic station is in the reverse oil supply working state, the third interface B1 and the fourth interface B2 are used as oil supply interfaces, the first interface A1 and the second interface A2 are used as return oil interfaces, and the manual proportional compound valve 13 is adjusted to make the oil entering the C1 port flow out through the C4 port, and enter the third interface B1 and the fourth interface B2 as the oil supply interface for oil supply. At this time, the oil drain interface A is in a closed state, and the E3 port is in a closed state; at the same time, the return oil enters the synchronization valve 16 through the first interface A1 and the second interface A2, and then enters the balance valve 14 through the E2 port, and then flows out through the E1 port, enters the manual proportional compound valve 13 through the C3 port, and then flows out from the C2 port, enters the return oil pipeline, and finally is filtered by the return oil filter 4 and returns to the oil tank 5.

[0017] During the oil supply process, the pressure switch 10 remains in the open state, and the pressure in the oil supply pipeline can be observed through the pressure gauge 11. When the pressure exceeds the preset value, the overflow valve 9 is opened, and part of the oil is diverted to the return oil pipeline, filtered by the return oil filter 4, and returned to the oil tank 5.

[0018] When the hydraulic station is in the oil leakage working state, open the oil leakage interface A, close the oil supply interface and the oil return interface, so that the oil returns to the oil tank 5 through the balance valve 14, the manual proportional compound valve 13 and the oil return filter 4.

[0019] The oil level in the oil tank 5 can be observed at any time through the level meter 1. When the oil in the oil tank 5 reaches the effective volume, the hydraulic station is shut down and the oil tank 5 is emptied. The oil tank 5 has 5 hydraulic power output ends, which can supply 2 walker cylinders, 2 derrick lifting cylinders, 2 derrick telescopic cylinders, 2 cathead cylinders, and 2 small hydraulic winches.

[0020] If the hydraulic station needs to be shut down, the hydraulic motor will continue to rotate for a while due to inertia. Because a connecting pipe is set between the pipe connecting the inlet of the D1 valve and the inlet of the D2 valve, and the pipe connecting the outlet of the D3 valve and the outlet of the D4 valve, at this time, turn on the switch on the connecting pipe, and the oil entering the brake valve group 15 through the N1 port will flow through the D3 valve and the D2 valve in turn, and then flow out through the N2 port, enter the manual proportional compound valve 13, and finally enter the oil return pipe; or, the oil entering the brake valve group 15 through the N2 port will flow through the D4 valve and the D1 valve in turn, and then flow out through the N1 port, enter the manual proportional compound valve 13, and finally enter the oil return pipe.

[0021] The above is only a preferred embodiment of the present invention, but the present invention is not limited to the above specific embodiments. For ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A mobile marine drilling and workover rig standby hydraulic station, characterized in that: The invention comprises an air filter (2), an oil supply filter (3), an oil return filter (4), an oil tank (5), a motor (6), a coupling (7), a hydraulic pump (8), a relief valve (9), a pressure switch (10), an oil supply check valve (12), a manual proportional compound valve (13), a balancing valve (14), a brake valve group (15) and a synchronization valve (16), wherein the air filter (2), the oil supply filter (3) and the oil return filter (4) are all arranged on the oil tank (5). The oil tank (5) is also provided with a liquid level gauge (1); the oil supply filter (3) is connected to the oil supply pipeline; the oil return filter (4) is connected to the oil return pipeline; the hydraulic pump (8), the overflow valve (9), the pressure switch (10) and the oil supply check valve (12) are sequentially arranged on the oil supply pipeline; the manual proportional compound valve (13) is a four-way reversing valve; the C1 port of the manual proportional compound valve (13) is connected to the oil supply pipeline; the C2 port of the manual proportional compound valve (13) is connected to the oil supply pipeline; the C3 port of the manual proportional compound valve (13) is connected to the oil supply pipeline; the C4 port of the manual proportional compound valve (13) is connected to the oil supply pipeline; the C5 port of the manual proportional compound valve (13) is connected to the oil supply pipeline; the C6 port of the manual proportional compound valve (13) is connected to the oil supply pipeline; the C7 port of the manual proportional compound valve (13) is connected to the oil supply pipeline; the C8 port of the manual proportional compound valve (13) is connected to the oil supply pipeline; the C9 port of the manual proportional compound valve (13) is connected to the oil supply pipeline; the C1 ...2 port of the manual proportional compound valve (13) is connected to the oil supply pipeline; the C The C2 port of the manual proportional compound valve (13) is connected to the oil return pipeline, the C3 port of the manual proportional compound valve (13) is connected to the E1 port of the balancing valve (14), the C4 port of the manual proportional compound valve (13) is connected to the E3 port of the balancing valve (14), the third port (B1), the fourth port (B2) and the N2 port of the brake valve group (15); the E2 port of the balancing valve (14) is connected to the synchronization valve (16), the N1 port of the brake valve group (15) and the oil drain port (A), and the synchronization valve (16) is also connected to the first interface (A1) and the second interface (A2); the portion of the oil supply pipeline between the hydraulic pump (8) and the oil supply check valve (12) is respectively connected to the inlet of the overflow valve (9) and the pressure switch (10), and the outlet of the overflow valve (9) is connected to the oil return pipeline; the pressure switch (10) is connected to a pressure gauge (11); the hydraulic pump (8) is connected to the coupling (7), and the coupling (7) is connected to the motor (6); The brake valve group (15) comprises four one-way valves, namely, a D1 valve, a D2 valve, a D3 valve and a D4 valve. The D1 valve is arranged in the opposite direction to the D2 valve, and the D3 valve is arranged in the opposite direction to the D4 valve. The outlet of the D1 valve and the inlet of the D3 valve are both connected to the N1 port, and the outlet of the D2 valve and the inlet of the D4 valve are both connected to the N2 port. The pipeline connecting the inlet of the D1 valve and the inlet of the D2 valve and the pipeline connecting the outlet of the D3 valve and the outlet of the D4 valve are connected through a connecting pipeline, and a control switch is arranged on the connecting pipeline; The balancing valve (14) is an externally controlled one-way sequence valve.

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