Electrohydraulic control system of deepwater coiled tubing equipment

Abstract

The invention relates to a deepwater coiled tubing equipment electro-hydraulic control system which comprises a hydraulic oil tank, a roller pump, a system pump, an injection head closed pump, a roller valve group, a roller motor assembly and an operating mechanism, and the roller valve group is provided with a first connector, a second connector, a third connector and a fourth connector which are communicated with one another; an inlet of the roller pump communicates with the hydraulic oil tank through a pipeline, an outlet of the roller pump communicates with the first connector through a pipeline, and the roller motor assembly communicates with the second connector through a pipeline. An inlet of the system pump communicates with the hydraulic oil tank through a pipeline. The operation mechanism communicates with the fourth connector through a pipeline. The injection head closed pump is communicated with a hydraulic oil tank, and the hydraulic oil tank is communicated with a first pressure compensator. The system provided by the invention has good sealing performance and seawater corrosion resistance, and can stably work for a long time in a deepwater seabed environment, so that the whole set of coiled tubing equipment can be placed in a deepwater seabed electro-hydraulic system to normally operate to realize various actions, and various actions of the whole machine are remotely controlled on a water ship through an umbilical cable.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas exploitation, and in particular to an electro-hydraulic control system for deepwater coiled tubing equipment. Background Art

[0002] As the development of marine oil and gas in the world continues to move towards the deep sea, the demand for deep-sea engineering equipment is increasing. At present, the trial production of natural gas hydrates in the sea is carried out by large floating drilling platforms (ships). The drilling capacity is far greater than the demand for natural gas hydrate exploitation in the sea, and there are problems such as high cost, low drilling efficiency, high technical difficulty and safety. The mode of using deep-water continuous pipe equipment to drill and construct on the seabed is a feasible way to economically develop natural gas hydrates in the sea, but there is no continuous pipe equipment for deep-water seabed in the existing technology.

[0003] Compared with conventional electro-hydraulic control systems, deepwater electro-hydraulic control systems have strict quality and life requirements, and the design size of the electro-hydraulic system needs to be reduced as much as possible, and hydraulic control components with higher reliability, maintenance-free or easy replacement should be selected. Currently, there are few electro-hydraulic control systems suitable for deepwater seabed environments, and their specific implementation forms and application objects are different from the deepwater coiled tubing equipment electro-hydraulic system involved in this invention. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an electro-hydraulic control system for deepwater coiled tubing equipment, aiming to solve the problems in the prior art.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] A deepwater coiled tubing equipment electro-hydraulic control system comprises a hydraulic oil tank, a drum pump, a system pump, a drum valve group, a drum motor assembly and an operating mechanism, wherein the drum valve group is provided with an interface 1 and an interface 2 which are interconnected, and an interface 3 and an interface 4 which are interconnected; the inlet of the drum pump is connected to the hydraulic oil tank through a pipeline, and the outlet thereof is connected to the interface 1 through a pipeline, and the drum motor assembly is connected to the interface 2 through a pipeline; the inlet of the system pump is connected to the hydraulic oil tank through a pipeline, and the outlet thereof is connected to the interface 3 through a pipeline, and the operating mechanism is connected to the interface 4 through a pipeline; the hydraulic oil tank is connected to a pressure compensator 1.

[0007] The beneficial effects of the present invention are as follows: during the operation, on the one hand, the oil in the hydraulic oil tank is sent to the drum motor assembly for operation through the drum pump, and on the other hand, the oil in the hydraulic oil tank is sent to the operating mechanism for operation through the system pump, so that the whole set of coiled tubing equipment can operate normally in a deep-water environment, and the construction in a deep-water environment such as coiled tubing drilling and downhole operation can be completed;

[0008] In addition, the above-mentioned drum valve group uses special valves suitable for use in deep water environments and is equipped with a pressure compensator to ensure safe and stable operation of the entire hydraulic system in deep water environments;

[0009] Moreover, the hydraulic oil tank is connected to pressure compensator 1 to ensure normal oil supply.

[0010] The electro-hydraulic control system provided by the present invention has good sealing performance and seawater corrosion resistance, can work stably for a long time in a deep-water seabed environment, and can place a whole set of coiled tubing equipment on the deep-water seabed. The electro-hydraulic system can operate normally to realize various actions, and the various actions of the whole machine can be remotely controlled on the water vessel through the umbilical cable.

[0011] Based on the above technical solution, the present invention can also be improved as follows.

[0012] Furthermore, it also includes an injection head closed pump, a closed pump control valve group and an injection head motor assembly. The inlet of the injection head closed pump is connected to the hydraulic oil tank through a pipeline, and the outlet is connected to the injection head motor assembly through a pipeline; the closed pump control valve group is connected to the injection head closed pump through a pipeline.

[0013] The beneficial effect of adopting the above further solution is that during the operation, the oil in the hydraulic oil tank is sent to the injection head motor assembly through the injection head closed pump for operation, which makes the oil supply convenient.

[0014] Furthermore, the injection head motor assembly includes multiple injection head motors and multiple reducer 1s. The multiple injection head motors are distributed in parallel, one end of which is connected to the outlet 2 of the injection head closed pump through a pipeline, and the other end is connected to the multiple reducer 1s; the multiple reducer 1s are connected to the pressure compensator 2 respectively.

[0015] The beneficial effect of adopting the above further scheme is that during the operation, the oil in the hydraulic oil tank is sent to multiple injection head motors for operation through the injection head closed pump, which makes the oil supply convenient; in addition, the operating speeds of multiple injection head motors can be adjusted by multiple reducers respectively, which makes the adjustment convenient.

[0016] Furthermore, it also includes two deep-water motors, the driving ends of the two deep-water motors are respectively connected to the drum pump and the injection head closed pump, and the drum pump is connected to the system pump through a transmission shaft; the two deep-water motors are respectively connected to pressure compensator three.

[0017] The beneficial effect of adopting the above-mentioned further scheme is that during the operation, the drum pump and the injection head closed pump are driven by two deep-water motors respectively, and the pressure of the drum pump and the injection head closed pump in deep water is supplemented by two pressure compensators to ensure that the drum pump and the injection head closed pump can operate normally.

[0018] Furthermore, the drum motor assembly includes a drum motor and a reducer 2, the inlet of the drum motor is connected to the interface 2 through a pipeline; the reducer 2 is connected to the drum motor through a transmission shaft, and the reducer 2 is connected to a pressure compensator 4.

[0019] The beneficial effect of adopting the above further scheme is that during the operation, the oil in the hydraulic oil tank is sent to the drum motor through the drum pump for operation, and the rotation speed of the drum motor can be regulated by the second reducer, which facilitates the operation.

[0020] Furthermore, the operating mechanism includes an injection head control structure and a roller control structure, the interface four is connected to the main pipeline, and the injection head control structure and the roller control structure are connected to the main pipeline through pipelines respectively.

[0021] The beneficial effect of adopting the above further scheme is that during the operation, the oil in the hydraulic oil tank is delivered to the injection head control structure and the roller control structure through the system pump for operation, so as to meet the normal operation of the entire set of continuous tubing equipment in a deepwater environment and complete the construction in a deepwater environment such as continuous tubing drilling and downhole operations.

[0022] Furthermore, the injection head control structure includes an injection head clamping cylinder, an injection head tensioning cylinder, an injection head brake and an injection head high and low speed device. The injection head clamping cylinder, the injection head tensioning cylinder, the injection head brake and the injection head high and low speed device are distributed in parallel, and are connected to the main pipeline through pipelines respectively; the roller control structure includes a roller moving cylinder and a roller brake, and the roller moving cylinder and the roller brake are connected to the main pipeline through pipelines respectively.

[0023] The beneficial effect of adopting the above further scheme is that during the operation, the oil in the hydraulic oil tank is sent to the injection head clamping cylinder, the injection head tensioning cylinder, the injection head brake and the injection head high and low speed device through the system pump to operate, so as to meet the normal operation of the whole set of coiled tubing equipment in a deep water environment, and complete the construction in a deep water environment such as coiled tubing drilling and downhole operations;

[0024] In addition, the oil in the hydraulic oil tank is delivered to the drum moving cylinder and drum brake through the system pump for operation, so as to ensure the normal operation of the entire set of continuous tubing equipment in deep water environment and complete the construction in deep water environment such as continuous tubing drilling and downhole operations.

[0025] Furthermore, the operating mechanism also includes a blowout preventer, an elevator and an auxiliary oil source. The blowout preventer, the elevator and the auxiliary oil source are respectively distributed in parallel and are connected to the main pipeline through pipelines.

[0026] The beneficial effect of adopting the above further scheme is that during the operation, the oil in the hydraulic oil tank is sent to the blowout preventer, the elevator and the auxiliary oil source through the system pump, and the blowout preventer, the elevator and the auxiliary oil source operate to meet the normal operation of the entire set of coiled tubing equipment in a deepwater environment, and complete the construction in a deepwater environment such as coiled tubing drilling and downhole operations.

[0027] Furthermore, a valve cavity connected to interface one, interface two, interface three and interface four is provided in the roller valve group, and the roller valve group is arranged in the hydraulic oil tank or the roller valve group is arranged outside the hydraulic oil tank and the valve cavity is connected to pressure compensator five.

[0028] The beneficial effect of adopting the above further solution is that the structure and position of the roller valve group are reasonably arranged, which can ensure the normal operation of each component, and can save space when the roller valve group is arranged inside the hydraulic oil tank.

[0029] Furthermore, it also includes a deep-water camera, a deep-water lighting, an operation monitoring station, a power supply and electric control cabinet, a lower computer and an electronic warehouse. The space in the hydraulic oil tank is divided by a partition into one chamber for storing oil and two chambers for installing the electronic warehouse. The electronic warehouse is fixedly installed in the two chambers, and the inlet of the drum pump and the inlet of the system pump are connected to the one chamber through pipelines respectively, and the lower computer is fixedly installed in the electronic warehouse; the power supply and electric control cabinet and the lower computer are connected to the operation monitoring station through lines respectively, and the drum valve group, the deep-water camera and the deep-water lighting are connected to the lower computer through lines respectively.

[0030] The beneficial effect of adopting the above-mentioned further scheme is that the whole machine's electronic control system supplies power to the above-water power supply, and the above-water operation and monitoring station remotely operates and monitors the underwater electronic control system, thereby realizing remote operation and monitoring of the whole machine on the water; at the same time, the power supply and operation and monitoring station can be expanded to be placed underwater, so that the whole machine can be operated and monitored underwater, which is convenient for operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a hydraulic principle diagram of the drum valve group in the present invention installed outside the hydraulic oil tank;

[0032] Figure 2 It is a hydraulic principle diagram of the drum valve group in the present invention installed in the hydraulic oil tank;

[0033] Figure 3 This is the electro-hydraulic control principle diagram of the present invention;

[0034] Figure 4 It is a three-dimensional structural schematic diagram of the hydraulic oil tank in the present invention;

[0035] Figure 5 It is a front view of the present invention;

[0036] Figure 6 It is a side view of the present invention.

[0037] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0038] 1. Hydraulic oil tank; 2. Drum pump; 3. System pump; 4. Drum valve group; 5. Pressure compensator 1; 6. Injection head closed pump; 7. Closed pump control valve group; 8. Injection head motor; 9. Reducer 1; 10. Pressure compensator 2; 11. Deepwater motor; 12. Pressure compensator 3; 13. Drum motor; 14. Reducer 2; 15. Pressure compensator 4; 16. Injection head clamping cylinder; 17. Injection head tensioning cylinder; 18. Injection head brake; 19. Injection head high and low speed device; 20. Drum moving cylinder; 21. Drum brake; 22. BOP; 23. Elevator; 24. Auxiliary oil source; 25. Deepwater camera; 26. Deepwater lighting; 27. Operation monitoring console; 28. Power supply and control cabinet; 29. ​​Lower computer; 30. Electronic warehouse; 31. Pressure compensator 5. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0042] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0043] Example 1

[0044] like Figures 1 to 6 As shown, this embodiment provides an electro-hydraulic control system for deepwater coiled tubing equipment, including a hydraulic oil tank 1, a drum pump 2, a system pump 3, a drum valve group 4, a drum motor assembly and an operating mechanism, wherein the drum valve group 4 is provided with an interface 1 and an interface 2 that are interconnected, and an interface 3 and an interface 4 that are interconnected; the inlet of the drum pump 2 is communicated with the hydraulic oil tank 1 through a pipeline, and its outlet is communicated with the interface 1 through a pipeline, and the drum motor assembly is communicated with the interface 2 through a pipeline; the inlet of the system pump 3 is communicated with the hydraulic oil tank 1 through a pipeline, and its outlet is communicated with the interface 3 through a pipeline, and the operating mechanism is communicated with the interface 4 through a pipeline; a valve cavity that is communicated with the interface 1, the interface 2, the interface 3 and the interface 4 is provided in the drum valve group 4, and the valve cavity and the hydraulic oil tank 1 are respectively connected with a pressure compensator 1 5.

[0045] During the operation, on the one hand, the oil in the hydraulic oil tank 1 is sent to the drum motor assembly for operation through the drum pump 2, and on the other hand, the oil in the hydraulic oil tank 1 is sent to the operating mechanism for operation through the system pump 3, so as to ensure the normal operation of the whole set of coiled tubing equipment in deep water environment and complete the construction in deep water environment such as coiled tubing drilling and downhole operation;

[0046] In addition, the drum valve group 4 uses special valves adapted to deep water environments and is equipped with a pressure compensator to achieve safe and stable operation of the entire hydraulic system in deep water environments;

[0047] Moreover, the hydraulic oil tank 1 is connected to the pressure compensator 1 to ensure normal oil supply.

[0048] During operation, the above system is placed in deep water for operation.

[0049] Preferably, in this embodiment, the drum pump 2 and the system pump 3 are respectively open pumps for oil supply.

[0050] The electro-hydraulic control system provided in this embodiment has good sealing performance and seawater corrosion resistance, and can work stably for a long time in a deep-water seabed environment, so that the entire set of continuous pipe equipment can be placed in the deep-water seabed. The electro-hydraulic system can operate normally to perform various actions, and the various actions of the entire machine can be remotely controlled on the watercraft through the umbilical cable.

[0051] Example 2

[0052] Based on Example 1, this embodiment also includes an injection head closed pump 6, a closed pump control valve group 7 and an injection head motor assembly, the inlet of the injection head closed pump 6 is connected to the hydraulic oil tank 1 through a pipeline, and the outlet is connected to the injection head motor assembly through a pipeline; the closed pump control valve group 7 is connected to the injection head closed pump through a pipeline.

[0053] During the operation, the oil in the hydraulic oil tank 1 is sent to the injection head motor assembly through the injection head closed pump 6 for operation, and the oil supply is convenient;

[0054] At the same time, the opening, closing, forward and reverse rotation of the injection head closed pump 6 are controlled by the closed pump control valve group 7.

[0055] Preferably, in this embodiment, the injection head closed pump 6 is a closed pump in the prior art.

[0056] Since the injection head closed pump 6 is directly installed in deep water, but it contains a proportional reversing valve, the above-mentioned proportional reversing valve is installed in the drum valve group 4, and the corresponding interface of the proportional reversing valve is connected to the injection head closed pump 6 through a pipeline to ensure that the injection head closed pump 6 can operate normally.

[0057] Example 3

[0058] On the basis of Example 2, in this embodiment, the injection head motor assembly includes multiple injection head motors 8 and multiple reducers 9. The multiple injection head motors 8 are distributed in parallel, one end of which is connected to the outlet 2 of the injection head closed pump 6 through a pipeline, and the other end is connected to the multiple reducers 9; the multiple reducers 9 are respectively connected to the pressure compensator 2 10.

[0059] During the operation, the oil in the hydraulic oil tank 1 is respectively delivered to the multiple injection head motors 8 through the injection head closed pump 6 for operation, and the oil supply is convenient; in addition, the operating speed of the multiple injection head motors 8 can be adjusted by multiple reducers 9, and the adjustment is convenient;

[0060] In addition, multiple pressure compensators 10 can be used to supplement pressure to multiple reducers 9 to ensure the normal operation of each component.

[0061] Based on the above solution, the number of the injection head motors 8 is preferably two.

[0062] Example 4

[0063] On the basis of any one of Examples 2 to 3, this embodiment further includes two deep-water motors 11, the driving ends of the two deep-water motors 11 are respectively connected to the drum pump 2 and the injection head closed pump 6, and the drum pump 2 is connected to the system pump 3 through a transmission shaft; the two deep-water motors 11 are respectively connected to pressure compensator three 12.

[0064] During the operation, the drum pump 2 and the injection head closed pump 6 are driven by two deep-water motors 11 respectively, and the pressure of the drum pump 2 and the injection head closed pump 6 in deep water is supplemented by two pressure compensators 12 to ensure that the drum pump 2 and the injection head closed pump 6 can operate normally.

[0065] Based on the above scheme, the drum pump 2 is connected to the system pump 3 through the transmission shaft, so that a deep-water motor 11 can drive the drum pump 2 and the system pump 3 to operate synchronously, saving energy and space.

[0066] Example 5

[0067] On the basis of the above embodiments, in this embodiment, the drum motor assembly includes a drum motor 13 and a reducer 14, the inlet of the drum motor 13 is connected to the interface 2 through a pipeline; the reducer 14 is connected to the drum motor 13 through a transmission shaft, and the reducer 14 is connected to a pressure compensator 4 15.

[0068] During the operation, the oil in the hydraulic oil tank 1 is delivered to the drum motor 13 through the drum pump 2 for operation. Meanwhile, the rotation speed of the drum motor 13 can be regulated by the reducer 14, which facilitates the operation.

[0069] The role of the above-mentioned pressure compensators in the hydraulic system is to be sensitive to the surrounding seawater pressure, and transmit the seawater pressure to the hydraulic system to compensate for the pressure of the hydraulic system, so as to eliminate or reduce the impact of the seawater pressure on the hydraulic system. Under normal circumstances, the hydraulic valve opening remains constant. When the external load increases, the flow rate output from the hydraulic valve will decrease. The addition of the pressure compensator will make the hydraulic valve under a certain range of pressure. Although the pressure changes, the output flow rate remains unchanged.

[0070] Example 6

[0071] On the basis of the above embodiments, in this embodiment, the operating mechanism includes an injection head control structure and a roller control structure, the interface four is connected to the main pipeline, and the injection head control structure and the roller control structure are connected to the main pipeline through pipelines respectively.

[0072] During the operation, the oil in the hydraulic oil tank 1 is delivered to the injection head control structure and the roller control structure through the system pump 3 to operate, so as to ensure the normal operation of the entire set of coiled tubing equipment in a deepwater environment and complete the construction in a deepwater environment such as coiled tubing drilling and downhole operations.

[0073] Example 7

[0074] On the basis of Example 6, in this embodiment, the injection head control structure includes an injection head clamping cylinder 16, an injection head tensioning cylinder 17, an injection head brake 18 and an injection head high and low speed device 19. The injection head clamping cylinder 16, the injection head tensioning cylinder 17, the injection head brake 18 and the injection head high and low speed device 19 are distributed in parallel, and are connected to the main pipeline through pipelines respectively.

[0075] During the operation, the oil in the hydraulic oil tank 1 is delivered to the injection head clamping cylinder 16, the injection head tensioning cylinder 17, the injection head brake 18 and the injection head high and low speed device 19 through the system pump 3 to operate, so as to ensure the normal operation of the whole set of coiled tubing equipment in a deep water environment and complete the construction in a deep water environment such as coiled tubing drilling and downhole operations.

[0076] It should be noted that the above-mentioned injection head clamping cylinder 16, injection head tensioning cylinder 17, injection head brake 18 and injection head high and low speed device 19 all adopt existing technologies, and their specific structures and principles will not be repeated here.

[0077] In addition, the drum control structure includes a drum moving hydraulic cylinder 20 and a drum brake 21, and the drum moving hydraulic cylinder 20 and the drum brake 21 are respectively connected to the main pipeline through pipelines.

[0078] During the operation, the oil in the hydraulic oil tank 1 is delivered to the drum moving cylinder 20 and the drum brake 21 through the system pump 3 to operate, so as to ensure the normal operation of the entire set of coiled tubing equipment in a deepwater environment and complete the construction in a deepwater environment such as coiled tubing drilling and downhole operations.

[0079] It should be noted that the above-mentioned roller moving cylinder 20 and roller brake 21 both adopt the existing technology, and their specific structures and principles are not described in detail here.

[0080] Example 8

[0081] On the basis of any one of Embodiments 6 to 7, in this embodiment, the operating mechanism further includes a blowout preventer 22, a lifting card 23 and an auxiliary oil source 24, and the blowout preventer 22, the lifting card 23 and the auxiliary oil source 24 are respectively distributed in parallel and are connected to the main pipeline through pipelines.

[0082] During the operation, the oil in the hydraulic oil tank 1 is delivered to the blowout preventer 22, the elevator 23 and the auxiliary oil source 24 through the system pump 3. The blowout preventer 22, the elevator 23 and the auxiliary oil source 24 operate to ensure that the entire set of coiled tubing equipment operates normally in a deepwater environment, and completes the construction in a deepwater environment such as coiled tubing drilling and downhole operations.

[0083] Example 9

[0084] On the basis of the above embodiments, in this embodiment, the roller valve group 4 is provided with a valve cavity connected to the interface one, the interface two, the interface three and the interface four, the roller valve group 4 is arranged in the hydraulic oil tank 1 or the roller valve group 4 is arranged outside the hydraulic oil tank 1 and the valve cavity is connected to the pressure compensator five 31.

[0085] The structure and position of the drum valve group 4 are reasonably arranged, which can ensure the normal operation of each component, and when the drum valve group 4 is arranged inside the hydraulic oil tank 1, it can save space and occupy less space.

[0086] Example 10

[0087] On the basis of the above embodiments, the present embodiment further includes a deepwater camera 25, a deepwater lighting lamp 26, an operation monitoring station 27, a power supply and electric control cabinet 28, a lower computer 29 and an electronic warehouse 30. The space in the hydraulic oil tank 1 is divided by a partition into a chamber for storing oil and two chambers for installing the electronic warehouse 30. The electronic warehouse 30 is fixedly installed in the two chambers. The inlet of the drum pump 2 and the inlet of the system pump 3 are respectively connected to the one chamber through pipelines, and the lower computer 29 is fixedly installed in the electronic warehouse 30; the power supply and electric control cabinet 28 and the lower computer 29 are respectively connected to the operation monitoring station 27 through lines, and the drum valve group 4, the deepwater camera 25 and the deepwater lighting lamp 26 are respectively connected to the lower computer 29 through lines.

[0088] The whole machine's electronic control system is powered by the above-water power supply, and the above-water operation and monitoring station remotely operates and monitors the underwater electronic control system, thereby realizing remote operation and monitoring of the whole machine from the water. At the same time, the power supply and operation and monitoring station can be expanded to be placed underwater to realize underwater operation and monitoring of the whole machine, which is convenient for operation.

[0089] Based on the above solution, the roller valve group 4 can be installed outside the hydraulic oil tank 1. At this time, the roller valve group 4 and the hydraulic oil tank 1 need to be connected to a pressure compensator 5 respectively.

[0090] Alternatively, the drum valve group 4 can also be installed in the second chamber of the hydraulic oil tank 1. In this case, only one pressure compensator 5 is required to be connected to the hydraulic oil tank 1, and then both deep-water motors 11 are connected to the hydraulic oil tank 1. This solution can reduce the number of compensators, reduce costs, save space, facilitate overall layout, and reduce overall size, but due to high concentration, the safety factor is low.

[0091] It should be noted that the sizes of the hydraulic oil tank 1 in the above two solutions may be consistent or inconsistent, and the drawings show inconsistent solutions.

[0092] Based on the above scheme, the above-mentioned operation monitoring station 27 and power supply control cabinet 28 are installed above the water surface, and the deep-water camera 25 and deep-water lighting 26 are installed below the deep water, which are respectively fixedly mounted on suitable equipment such as the hydraulic oil tank 1.

[0093] In addition, the lower computer is placed in the electronic warehouse. The water power supply and control cabinet mainly provides strong power and control system for the deep-water motor, and provides weak power supply for the whole machine's electronic control system. The operation monitoring station mainly controls the start and stop of the deep-water motor and the action of each actuator of the whole machine, and displays and monitors each collected parameter in real time.

[0094] Preferably, in this embodiment, the hydraulic oil tank 1 is preferably a cylindrical box body, and the hydraulic oil tank is connected to a corresponding pressure compensator to achieve pressure compensation of the hydraulic components of the whole machine to adapt to the deep water environment through the oil tank.

[0095] In addition, the electronic compartment 30 is located in the second cavity, and a plurality of cable plugs are installed on the corresponding ends of the hydraulic oil tank 1. The plurality of cable plugs are connected to various devices through cables, and are connected to the electronic compartments respectively.

[0096] The working principle of the present invention is as follows:

[0097] During the operation, on the one hand, the oil in the hydraulic oil tank 1 is sent to the drum motor assembly for operation through the drum pump 2, and on the other hand, the oil in the hydraulic oil tank 1 is sent to the injection head clamping cylinder 16, the injection head tensioning cylinder 17, the injection head brake 18, the injection head high and low speed device 19, the drum moving cylinder 20, the drum brake 21, the blowout preventer 22, the elevator 23 and the auxiliary oil source 24 for operation, so as to ensure the normal operation of the whole set of coiled tubing equipment in deep water environment and complete the construction in deep water environment such as coiled tubing drilling and downhole operation;

[0098] At the same time, the oil in the hydraulic oil tank 1 is respectively delivered to a plurality of injection head motors 8 through the injection head closed pump 6 for operation, so that the oil supply is convenient.

[0099] The beneficial effects of the present invention are:

[0100] It can meet the requirements of normal operation of the entire set of continuous tubing equipment in deepwater environment, complete the construction in deepwater environment such as continuous tubing drilling and downhole operations; expand the demand for deepwater engineering equipment in deep-sea oil and gas development, and effectively promote the efficient and economic development of deepwater oil and gas resources.

[0101] Each hydraulic valve component uses special valve components suitable for use in deepwater environments. The hydraulic valve group is divided into an oil-immersed valve group and a valve group directly in contact with seawater according to the situation of the hydraulic valve components. The oil-immersed valve group is equipped with a pressure compensator to ensure safe and stable operation of the entire hydraulic system in deepwater environments.

[0102] The hydraulic oil tank and the pressure-bearing electronic compartment are integrated into an integrated design. One chamber is a low-pressure area connected to the pressure compensator for storing hydraulic oil, and the other chamber is a high-pressure electronic compartment for placing electrical system components. The oil-immersed valve group can also be placed inside the hydraulic oil tank, and the deep-water motor can be connected to the hydraulic oil tank to share the pressure compensator, further reducing the overall size.

[0103] The whole machine's electronic control system is powered by the above-water power supply, and the above-water operation and monitoring station remotely operates and monitors the underwater electronic control system, thereby realizing remote operation and monitoring of the whole machine from the water; at the same time, the power supply, operation and monitoring station can be expanded to be placed underwater to realize underwater operation and monitoring of the whole machine.

[0104] The purpose of the present invention is to provide an electro-hydraulic control system for deepwater coiled tubing equipment, so that the whole set of coiled tubing equipment can be placed on the deepwater seabed, and the electro-hydraulic system can operate normally to realize various actions, and the actions of the whole machine can be remotely controlled on the water ship through the umbilical cable. The electro-hydraulic system has good sealing performance and seawater corrosion resistance, and can work stably for a long time in the deepwater seabed environment, which helps the economic and efficient development of natural gas hydrates in the sea area.

[0105] It should be noted that the double-line connection between two components in the drawings means that the two components are connected via a transmission shaft, and one line represents pipeline communication.

[0106] In addition, each electronic component involved in the present invention adopts the existing technology, and each of the above components is electrically connected to the lower computer, and the control circuit between the lower computer and each component is the existing technology.

[0107] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0108] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0109] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electro-hydraulic control system for deepwater coiled tubing equipment, characterized in that: The invention comprises a hydraulic oil tank (1), a roller pump (2), a system pump (3), a roller valve group (4), a roller motor assembly and an operating mechanism. The roller valve group (4) is provided with an interface 1 and an interface 2 which are interconnected, and an interface 3 and an interface 4 which are interconnected. The inlet of the roller pump (2) is connected to the hydraulic oil tank (1) through a pipeline, and its outlet is connected to the interface 1 through a pipeline. The roller motor assembly is connected to the interface 2 through a pipeline. The inlet of the system pump (3) is connected to the hydraulic oil tank (1) through a pipeline, and its outlet is connected to the interface 3 through a pipeline. The operating mechanism is connected to the interface 4 through a pipeline. The hydraulic oil tank (1) is connected to a pressure compensator 1 (5).

2. The deepwater coiled tubing equipment electro-hydraulic control system according to claim 1, characterized in that: It also includes an injection head closed pump (6), a closed pump control valve group (7) and an injection head motor assembly. The inlet of the injection head closed pump (6) is connected to the hydraulic oil tank (1) through a pipeline, and the outlet is connected to the injection head motor assembly through a pipeline; the closed pump control valve group (7) is connected to the injection head closed pump (6) through a pipeline.

3. The deepwater coiled tubing equipment electro-hydraulic control system according to claim 2, characterized in that: The injection head motor assembly includes multiple injection head motors (8) and multiple reducer ones (9). The multiple injection head motors (8) are distributed in parallel, one end of each motor is connected to the outlet two of the injection head closed pump (6) through a pipeline, and the other end is connected to the multiple reducer ones (9); the multiple reducer ones (9) are connected to the pressure compensator two (10).

4. The deepwater coiled tubing equipment electro-hydraulic control system according to claim 2, characterized in that: It also includes two deep-water motors (11), the driving ends of the two deep-water motors (11) are respectively connected to the drum pump (2) and the injection head closed pump (6), and the drum pump (2) is connected to the system pump (3) through a transmission shaft; the two deep-water motors (11) are respectively connected to a pressure compensator three (12).

5. The deepwater coiled tubing equipment electro-hydraulic control system according to any one of claims 1 to 4, characterized in that: The drum motor assembly comprises a drum motor (13) and a second reducer (14); the inlet of the drum motor (13) is connected to the second interface via a pipeline; the second reducer (14) is connected to the drum motor (13) via a transmission shaft, and the second reducer (14) is connected to a fourth pressure compensator (15).

6. The deepwater coiled tubing equipment electro-hydraulic control system according to any one of claims 1 to 4, characterized in that: The operating mechanism includes an injection head control structure and a roller control structure. The interface 4 is connected to the main pipeline. The injection head control structure and the roller control structure are connected to the main pipeline through pipelines respectively.

7. The deepwater coiled tubing equipment electro-hydraulic control system according to claim 6, characterized in that: The injection head control structure comprises an injection head clamping cylinder (16), an injection head tensioning cylinder (17), an injection head brake (18) and an injection head high and low speed device (19); the injection head clamping cylinder (16), the injection head tensioning cylinder (17), the injection head brake (18) and the injection head high and low speed device (19) are distributed in parallel and are connected to the main pipeline through pipelines respectively; the roller control structure comprises a roller moving cylinder (20) and a roller brake (21); the roller moving cylinder (20) and the roller brake (21) are connected to the main pipeline through pipelines respectively.

8. The deepwater coiled tubing equipment electro-hydraulic control system according to claim 6, characterized in that: The operating mechanism further comprises a blowout preventer (22), an elevator (23) and an auxiliary oil source (24); the blowout preventer (22), the elevator (23) and the auxiliary oil source (24) are respectively connected in parallel and are connected to the main pipeline through pipelines.

9. The deepwater coiled tubing equipment electro-hydraulic control system according to any one of claims 1 to 4, characterized in that: The roller valve group (4) is provided with a valve cavity which is connected to the interface 1, the interface 2, the interface 3 and the interface 4; the roller valve group (4) is arranged in the hydraulic oil tank (1) or the roller valve group (4) is arranged outside the hydraulic oil tank (1) and the valve cavity is connected to the pressure compensator 5 (31).

10. The deepwater coiled tubing equipment electro-hydraulic control system according to any one of claims 1 to 4, characterized in that: It also includes a deep-water camera (25), a deep-water lighting lamp (26), an operation monitoring station (27), a power supply and electric control cabinet (28), a lower computer (29) and an electronic warehouse (30). The space in the hydraulic oil tank (1) is divided into a chamber for storing oil and two chambers for installing the electronic warehouse (30) by a partition. The electronic warehouse (30) is fixedly installed in the two chambers. The inlet of the drum pump (2) and the inlet of the system pump (3) are respectively connected to the one chamber through pipelines. The lower computer (29) is fixedly installed in the electronic warehouse (30); the power supply and electric control cabinet (28) and the lower computer (29) are respectively connected to the operation monitoring station (27) through lines, and the drum valve group (4), the deep-water camera (25) and the deep-water lighting lamp (26) are respectively connected to the lower computer (29) through lines.

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