Underwater hydraulic driving device

Abstract

The invention discloses an underwater hydraulic driving device, which belongs to the technical field of oilfield oil and gas development, and comprises an ROV pressure supply unit and a hydraulic power unit, the ROV pressure supply unit is connected with the hydraulic power unit, the ROV pressure supply unit drives the hydraulic power unit to output hydraulic power to the hydraulic power unit, and the hydraulic power is output to the hydraulic power unit by changing the hydraulic flow and pressure provided by the ROV pressure supply unit. The output flow and pressure of the hydraulic power unit can be adjusted, and the hydraulic power unit is connected with an ROV external tool. A hydraulic loop of the ROV pressure supply unit is effectively isolated from a hydraulic loop generated by the hydraulic power unit, external seawater is prevented from entering the hydraulic system of the ROV, and the hydraulic system has the advantages and characteristics of being convenient and fast to mount or dismount, convenient to test, small in occupied space, light in weight, high in reliability, large in pressure adjustable range and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of oil field oil and gas development, and in particular relates to an underwater hydraulic drive device. Background Art

[0002] Oil and gas development in oil fields requires the installation of complex underwater production systems. During the installation of various underwater structures, ROVs need to use various hydraulic tools for locking and sealing tests. At the same time, deepwater oil and gas field structures also need to inject chemical agents such as ethylene glycol. Since various ROV tools need to be driven by hydraulic power as a power source to work, and because of underwater work, it is difficult to avoid water entering the ROV tool pipeline. If these ROV tools are directly connected to the ROV hydraulic system, seawater will inevitably enter the ROV hydraulic system during the operation. The entry of seawater into the hydraulic system will greatly reduce the working life of the ROV hydraulic power unit, so the ROV hydraulic system needs to be flushed as a whole and the hydraulic oil needs to be replaced, which greatly increases the maintenance workload of ROV equipment and reduces the efficiency of offshore operations. Therefore, a hydraulic drive device is needed to isolate the ROV tool from the ROV hydraulic system while providing hydraulic power for the ROV tool. The existing hydraulic drive device is cumbersome to install, has a single function, is heavy, large in size, and has a small adjustable pressure range, which greatly reduces the operating efficiency.

[0003] Therefore, it is urgent to design an underwater hydraulic drive device to solve the above-mentioned problems. Summary of the invention

[0004] The object of the present invention is to provide an underwater hydraulic drive device, which has the advantages of simplifying installation, testing and dismantling work and solves the problems mentioned in the background technology.

[0005] To achieve the above purpose, a specific technical solution of an underwater hydraulic drive device of the present invention is as follows: An underwater hydraulic drive device comprises an ROV pressure supply unit and a hydraulic power unit. The ROV pressure supply unit is connected to the hydraulic power unit. The ROV pressure supply unit drives the hydraulic power unit to output hydraulic power to the hydraulic power unit. The output flow and pressure of the hydraulic power unit can be adjusted by changing the hydraulic flow and pressure provided by the ROV pressure supply unit. The hydraulic power unit is connected to an external tool of the ROV.

[0006] Furthermore, the hydraulic power unit includes a hydraulic motor and a hydraulic pump. The hydraulic motor is connected to the ROV pressure supply unit to drive the output shaft of the hydraulic motor to rotate through the ROV pressure supply unit. The output shaft of the hydraulic motor is connected to the hydraulic pump to drive the hydraulic pump to output hydraulic pressure through the hydraulic motor. The hydraulic pump is connected to the ROV external tool.

[0007] Furthermore, the output end of the ROV pressure supply unit is connected to a first hydraulic pipe, one end of the first hydraulic pipe away from the ROV pressure supply unit is connected to the fluid inlet end of the hydraulic motor, the discharge end of the hydraulic motor is connected to a second hydraulic pipe, and one end of the second hydraulic pipe away from the hydraulic motor is connected to the recovery end of the ROV pressure supply unit.

[0008] Furthermore, it also includes an ROV connector, which can be connected to an ROV external tool. The output end of the hydraulic pump is connected to a third hydraulic pipe, the end of the third hydraulic pipe away from the hydraulic pump is connected to the liquid inlet end of the ROV connector, the discharge end of the ROV connector is connected to a fourth hydraulic pipe, and the end of the fourth hydraulic pipe away from the ROV connector is connected to the receiving end of the hydraulic pump.

[0009] Furthermore, the fourth hydraulic pipe is connected to an external oil tank, and hydraulic oil is arranged in the external oil tank.

[0010] Furthermore, the fourth hydraulic pipe includes a first branch pipe and a second branch pipe, the first branch pipe is connected to the discharge end of the ROV connector, the end of the first branch pipe away from the ROV connector is connected to the recovery end of the external oil tank, the outlet end of the external oil tank is connected to the second branch pipe, and the end of the second branch pipe away from the external oil tank is connected to the receiving end of the hydraulic pump.

[0011] Furthermore, an underwater hydraulic control valve is fixedly connected to the third hydraulic pipe, and the underwater hydraulic control valve is used to control whether the hydraulic pump is connected to the ROV external tool.

[0012] Furthermore, it also includes a control module, which is connected to a control pipeline, and the control pipeline is connected to the ROV pressure supply unit.

[0013] Furthermore, the control module is electrically connected to the underwater hydraulic control valve.

[0014] Furthermore, a pressure gauge is connected to the third hydraulic pipe.

[0015] The present invention has the following advantages: the hydraulic circuit of the ROV pressure supply unit of the present invention is effectively isolated from the hydraulic circuit generated by the hydraulic power unit, preventing external seawater from entering the ROV's own hydraulic system, and the hydraulic system has many advantages and characteristics such as convenient and quick installation or removal, convenient testing, small footprint, light weight, high reliability, and a large pressure adjustable range. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the underwater hydraulic drive device of the present invention; Explanation of the markings in the figure: 1. ROV pressure supply unit; 11. First hydraulic pipe; 12. Second hydraulic pipe; 2. Hydraulic power unit; 21. Hydraulic motor; 22. Hydraulic pump; 23. Third hydraulic pipe; 24. ROV external tool; 25. Fourth hydraulic pipe; 26. Underwater hydraulic control valve; 3. External oil tank; 31. First branch pipe; 32. Second branch pipe; 4. Pressure gauge; 5. Control module; 51. Control pipeline. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0018] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0019] Please refer to the attached Figure 1 An underwater hydraulic drive device of the present invention is described.

[0020] This hydraulic drive device is installed on the ROV frame and operated by the ROV pilot to provide hydraulic power to achieve multiple underwater functions.

[0021] At present, the existing hydraulic drive devices are complicated to install, have single functions, are heavy, large in size, have a small adjustable pressure range, and greatly reduce their operating efficiency.

[0022] An underwater hydraulic drive device includes an ROV pressure supply unit 1 and a hydraulic power unit 2. The ROV pressure supply unit 1 is connected to the hydraulic power unit 2. The ROV pressure supply unit 1 drives the hydraulic power unit 2 to output hydraulic power to the hydraulic power unit 2. The output flow and pressure of the hydraulic power unit 2 can be adjusted by changing the hydraulic flow and pressure provided by the ROV pressure supply unit 1. The hydraulic power unit 2 is connected to the ROV external tool 24.

[0023] Furthermore, the hydraulic power unit 2 includes a hydraulic motor 21 and a hydraulic pump 22. The hydraulic motor 21 is connected to the ROV pressure supply unit 1 to drive the output shaft of the hydraulic motor 21 to rotate through the ROV pressure supply unit 1. The output shaft of the hydraulic motor 21 is connected to the hydraulic pump 22 to drive the hydraulic pump 22 to output hydraulic pressure through the hydraulic motor 21. The hydraulic pump 22 is connected to the ROV external tool 24.

[0024] Specifically, the hydraulic motor 21 operates under the power provided by the ROV pressure supply unit 1 and drives the hydraulic pump 22 to work, so that the hydraulic pump 22 outputs hydraulic power. By changing the hydraulic flow and pressure provided by the ROV pressure supply unit 1, the output flow and pressure of the hydraulic pump 22 can be effectively adjusted.

[0025] The hydraulic circuit of the ROV pressure supply unit 1 is effectively isolated from the hydraulic circuit generated by the hydraulic power unit 2, preventing external seawater from entering the ROV's own hydraulic system.

[0026] The output end of the ROV pressure supply unit 1 is connected to a first hydraulic pipe 11, and one end of the first hydraulic pipe 11 away from the ROV pressure supply unit 1 is connected to the liquid inlet end of the hydraulic motor 21. The discharge end of the hydraulic motor 21 is connected to a second hydraulic pipe 12, and one end of the second hydraulic pipe 12 away from the hydraulic motor 21 is connected to the recovery end of the ROV pressure supply unit 1.

[0027] The driving device also includes an ROV connector, which can be connected to an ROV external tool 24. The output end of the hydraulic pump 22 is connected to a third hydraulic pipe 23. The end of the third hydraulic pipe 23 away from the hydraulic pump 22 is connected to the liquid inlet end of the ROV connector. The discharge end of the ROV connector is connected to a fourth hydraulic pipe 25. The end of the fourth hydraulic pipe 25 away from the ROV connector is connected to the receiving end of the hydraulic pump 22.

[0028] The fourth hydraulic pipe 25 is connected to an external oil tank 3 , and the external oil tank 3 is filled with hydraulic oil.

[0029] Preferably, the driving device uses hydraulic oil. In other embodiments of the present invention, different types of liquid media can be added to the external oil tank 3 according to the requirements of the ROV underwater operation task.

[0030] The fourth hydraulic pipe 25 includes a first branch pipe 31 and a second branch pipe 32. The first branch pipe 31 is connected to the discharge end of the ROV connector, and the end of the first branch pipe 31 away from the ROV connector is connected to the recovery end of the external oil tank 3. The liquid outlet end of the external oil tank 3 is connected to the second branch pipe 32, and the end of the second branch pipe 32 away from the external oil tank 3 is connected to the receiving end of the hydraulic pump 22.

[0031] Furthermore, an underwater hydraulic control valve 26 is fixedly connected to the third hydraulic pipe 23 , and the underwater hydraulic control valve 26 is used to control whether the hydraulic pump 22 is connected to the ROV external tool 24 , and the running direction of the ROV external tool 24 can be controlled.

[0032] Furthermore, it also includes a control module 5, to which a control pipeline 51 is connected, and the control pipeline 51 is connected to the ROV pressure supply unit 1, so as to realize the start and stop control of the novel underwater hydraulic drive device.

[0033] Specifically, the control module 5 is electrically connected to the underwater hydraulic control valve 26 .

[0034] The control module 5 controls the underwater hydraulic control valve 26 to switch direction, thereby realizing the control and use of the ROV external tool 24 .

[0035] Furthermore, a pressure gauge 4 is connected to the third hydraulic pipe 23 , and a pressure indication is provided through the pressure gauge 4 .

[0036] The hydraulic circuit of the ROV pressure supply unit 1 of the present invention is effectively isolated from the hydraulic circuit generated by the hydraulic power unit 2 to prevent external seawater from entering the ROV's own hydraulic system. The hydraulic system has many advantages and characteristics, such as convenient and quick installation or removal, convenient testing, small footprint, light weight, high reliability, and a large pressure adjustable range.

[0037] The device can not only drive various ROV underwater tools to perform locking, sealing, and injection of various liquid media, but also ensure the isolation of the ROV's own hydraulic system from the ROV tool pipeline, thereby preventing liquid media such as seawater from entering the ROV's own hydraulic system.

[0038] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An underwater hydraulic drive device, characterized in that: It includes an ROV pressure supply unit and a hydraulic power unit. The ROV pressure supply unit is connected to the hydraulic power unit. The ROV pressure supply unit drives the hydraulic power unit to output hydraulic power to the hydraulic power unit. The output flow and pressure of the hydraulic power unit can be adjusted by changing the hydraulic flow and pressure provided by the ROV pressure supply unit. The hydraulic power unit is connected to the ROV external tool.

2. The underwater hydraulic drive device according to claim 1, characterized in that: The hydraulic power unit includes a hydraulic motor and a hydraulic pump. The hydraulic motor is connected to the ROV pressure supply unit to drive the output shaft of the hydraulic motor to rotate through the ROV pressure supply unit. The output shaft of the hydraulic motor is connected to the hydraulic pump to drive the hydraulic pump to output hydraulic pressure through the hydraulic motor. The hydraulic pump is connected to the ROV external tool.

3. The underwater hydraulic drive device according to claim 2, characterized in that: The output end of the ROV pressure supply unit is connected to a first hydraulic pipe, one end of the first hydraulic pipe away from the ROV pressure supply unit is connected to the fluid inlet end of the hydraulic motor, the discharge end of the hydraulic motor is connected to a second hydraulic pipe, and one end of the second hydraulic pipe away from the hydraulic motor is connected to the recovery end of the ROV pressure supply unit.

4. The underwater hydraulic drive device according to claim 2, characterized in that: It also includes an ROV connector, which can be connected to an ROV external tool. The output end of the hydraulic pump is connected to a third hydraulic pipe, an end of the third hydraulic pipe away from the hydraulic pump is connected to the liquid inlet end of the ROV connector, the discharge end of the ROV connector is connected to a fourth hydraulic pipe, and an end of the fourth hydraulic pipe away from the ROV connector is connected to the receiving end of the hydraulic pump.

5. The underwater hydraulic drive device according to claim 4, characterized in that: The fourth hydraulic pipe is connected with an external oil tank, and the external oil tank is filled with hydraulic oil.

6. The underwater hydraulic drive device according to claim 5, characterized in that: The fourth hydraulic pipe includes a first branch pipe and a second branch pipe, the first branch pipe is connected to the discharge end of the ROV connector, the end of the first branch pipe away from the ROV connector is connected to the recovery end of the external oil tank, the outlet end of the external oil tank is connected to the second branch pipe, and the end of the second branch pipe away from the external oil tank is connected to the receiving end of the hydraulic pump.

7. The underwater hydraulic drive device according to claim 4, characterized in that: The third hydraulic pipe is fixedly connected with an underwater hydraulic control valve, through which the underwater hydraulic control valve is used to control whether the hydraulic pump is connected to the ROV external tool.

8. The underwater hydraulic drive device according to claim 3, characterized in that: It also includes a control module, which is connected with a control pipeline, and the control pipeline is connected with the ROV pressure supply unit.

9. The underwater hydraulic drive device according to claim 7 or 8, characterized in that: The control module is electrically connected to the underwater hydraulic control valve.

10. The underwater hydraulic drive device according to claim 4, characterized in that: The third hydraulic pipe is connected with a pressure gauge.

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