A recovery system for associated gas

Abstract

The present application provides an associated gas recovery system, wherein a processing platform is arranged floatingly on the sea surface; one end of the pipe gallery is detachably connected to the production platform, and the other end is connected to the processing platform; the pipe gallery can be retracted to maintain connection with the processing platform when the position of the processing platform moves; a gas pipeline is arranged in the pipe gallery, one end of which is detachably and flexibly connected to and communicated with the production platform, and the other end is flexibly connected to and communicated with the processing platform, so that the associated gas on the production platform can be transported to the processing platform through the gas pipeline, and the gas pipeline can move with the position of the processing platform and maintain connection with the processing platform; when the pipe gallery and the gas pipeline are both disconnected from the production platform, the associated gas recovery system can be connected to another production platform to recover the associated gas of the other production platform. The utilization rate of the recovery system is improved, the construction process of the associated gas recovery system is simplified, and the cost of associated gas recovery in offshore oil fields is reduced.

Description

Technical Field

[0001] The present application relates to the field of marine engineering recovery technology, and in particular to an associated gas recovery system. Background Art

[0002] The associated gas of offshore oil fields needs to be burned or vented through torches due to its small or unstable production, which not only wastes resources but also causes certain pollution to the atmosphere. In order to reduce the amount of associated gas burned and vented at sea and reduce carbon emissions, the methods of recycling and utilizing associated gas in offshore oil fields can be roughly divided into: pipeline recovery, oil field reinjection, power generation transmission, liquefaction recovery, compression recovery, etc. Different recycling and utilization methods can be selected according to the geographical location of the offshore oil field, formation conditions, mining mode, pipeline distribution, cable distribution, production conditions, remaining space on the production platform and other conditions. Among them, only liquefaction recovery and compression recovery have no engineering applications yet, but there are no technical difficulties and carbon emission risks in the implementation of the two methods of liquefaction and compression recovery. The main constraints are the economic efficiency of the recovery plan and the oil field output.

[0003] The offshore associated gas liquefaction or compression recovery solution is mainly based on offshore oil fields with large amounts of associated gas. By building a floating or movable associated gas processing platform next to the production platform, the associated gas, cables, etc. are transferred from the production platform to the processing platform using a pipe gallery structure, and the associated gas is processed into a form that can be exported or transported using the liquefaction or compression processing process system on the processing platform, thereby realizing the recycling of the associated gas. Since the production of associated gas is unstable, the stable production period is usually 5-8 years. Therefore, the associated gas processing platform should be designed to be movable or floating to increase the utilization rate of the associated gas processing platform, so that it can serve multiple production platforms during the service life of the platform. However, the traditional pipe gallery structure is fixed and cannot be easily removed once it is successfully built and installed. It is not suitable for the operation mode of the associated gas processing platform. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide an associated gas recovery system to solve the problem that the pipeline corridors of the associated gas recovery systems of conventional offshore oil fields cannot be reused.

[0005] The embodiment of the present application adopts the following technical solution: a recovery system for associated gas, which is applied to different associated gas production platforms in offshore oil fields, comprising:

[0006] A processing platform, which is used to liquefy or compress the associated gas and output the liquefied or compressed associated gas; the processing platform is floated on the sea surface;

[0007] A pipe gallery having an installation space, one end of the pipe gallery being detachably connected to the production platform, and the other end of the pipe gallery being connected to the processing platform; the pipe gallery being retractable so that when the position of the processing platform moves, the pipe gallery can remain connected to the processing platform;

[0008] A gas pipeline is arranged in the pipe gallery, one end of the gas pipeline is detachably and flexibly connected to and communicated with the production platform, and the other end of the gas pipeline is flexibly connected to and communicated with the processing platform, so that the associated gas on the production platform can be transported to the processing platform through the gas pipeline, and the gas pipeline can move with the position of the processing platform to maintain communication with the processing platform;

[0009] When the pipe gallery and the gas transmission pipeline are both disconnected from the production platform, the associated gas recovery system can be connected to another production platform to recover the associated gas of the other production platform.

[0010] In some embodiments, the pipe gallery includes a telescopic pipe, a shearing and disengaging device, and a connecting pipe head;

[0011] One end of the telescopic pipe is connected to one end of the shear detachment device, and the other end of the shear detachment device is connected to the production platform. When the shear force at the connection between the pipe gallery and the production platform is greater than the limit shear force of the shear detachment device, the shear detachment device is disconnected from the production platform;

[0012] The other end of the telescopic pipe is connected to one end of the connecting pipe head, and the other end of the connecting pipe head is connected to the processing platform.

[0013] In some embodiments, the shear detachment device includes a first structural member and a second structural member, one end of the first structural member is connected to the production platform, the other end of the first structural member is connected to one end of the second structural member, and the other end of the second structural member is connected to the telescopic pipe. When the shear force at the connection between the first structural member and the second structural member is greater than the limit shear force of the shear detachment device, the second structural member detaches from the first structural member.

[0014] In some embodiments, the gas pipeline includes a first telescopic hose, a second telescopic hose and a hard pipe;

[0015] One end of the first telescopic hose is connected to the air outlet of the production platform, and the other end of the first telescopic hose is connected to one end of the hard pipe; the other end of the hard pipe is connected to one end of the second telescopic hose, and the other end of the second telescopic hose is connected to the air inlet of the processing platform.

[0016] In some embodiments, the first telescopic hose and / or the second telescopic hose comprises a first telescopic hose part and a second telescopic hose part;

[0017] The gas pipeline also includes an emergency release device;

[0018] The emergency detachment device is arranged between the first telescopic hose portion and the second telescopic hose portion. When the locking mechanism of the emergency detachment device is released, the first telescopic hose portion is disconnected from the second telescopic hose portion.

[0019] In some embodiments, the emergency detachment device is interlocked with the shear detachment device, so that when the telescopic hose part 1 is disconnected from the telescopic hose part 2, a signal is sent to the processor of the processor platform, and the processor sends a disconnection signal to the shear detachment device to disconnect the shear detachment device from the production platform; or,

[0020] When the shearing and detaching device is disconnected from the production platform, a signal is sent to the processor, and the processor sends a disconnection signal to the emergency detaching device to disconnect the first part of the telescopic hose from the second part of the telescopic hose.

[0021] In some embodiments, the emergency release device also includes a first sealing valve, a first driving mechanism, a second sealing valve and a second driving mechanism. The first sealing valve is connected to the first part of the telescopic hose, and the second sealing valve is connected to the second part of the telescopic hose. The first sealing valve and the second sealing valve are connected through the locking mechanism. When the locking mechanism is released, the first driving mechanism drives the first sealing valve to close, and the second driving mechanism drives the second sealing valve to close.

[0022] In some embodiments, the first driving mechanism includes a first hydraulic motor and a first worm gear reducer, the first hydraulic motor is connected to the first worm gear reducer, the first worm gear reducer is connected to the first sealing valve, and the first hydraulic motor drives the first worm gear reducer to close or open the first sealing valve;

[0023] The second driving mechanism includes a second hydraulic motor and a second worm gear reducer, the second hydraulic motor is connected to the second worm gear reducer, the second worm gear reducer is connected to the second sealing valve, and the second hydraulic motor drives the second worm gear reducer to close or open the second sealing valve.

[0024] In some embodiments, the shear detachment device comprises a third hydraulic motor, wherein the third hydraulic motor is configured to receive a disconnection signal from the processor and provide a force to disconnect the shear detachment device from the production platform.

[0025] In some embodiments, the first and second telescopic hoses are metal bellows or composite hoses, the hard pipe is a steel pipe, and the inner wall of the gas pipeline is provided with an anti-corrosion coating.

[0026] The beneficial effects of the embodiments of the present application are:

[0027] By detachably arranging the pipe gallery on the production platform and arranging the gas pipeline in the pipe gallery, and connecting the gas pipeline to the production platform in a detachable manner, when the production platform needs to be replaced, the pipe gallery and the gas pipeline can be detached from the production platform together with the processing platform and then applied to another production platform, thereby improving the utilization rate of the pipe gallery, the gas pipeline and the processing platform, simplifying the construction process of the associated gas recovery system, and reducing the cost of associated gas recovery in offshore oil fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1 This is a schematic diagram of the structure of the associated gas recovery system of this application;

[0030] Figure 2 A schematic diagram of the structure of the pipe gallery, gas pipeline and processing platform separated from the production platform for this application;

[0031] Figure 3 This is a schematic diagram of the structure of the gas pipeline for this application;

[0032] Figure 4 This is a schematic diagram of the structure of the emergency release device of this application.

[0033] Figure numerals: 1. production platform; 2. processing platform; 3. pipe gallery; 4. shear detachment device; 5. gas transmission pipeline; 6. first telescopic hose; 601. telescopic hose part 1; 602. telescopic hose part 2; 7. second telescopic hose; 8. emergency detachment device; 801. first sealing valve; 802. second sealing valve; 803. flange; 804. locking mechanism; 8041. hydraulic cylinder; 8042. locking rod; 805. first hydraulic motor; 806. first worm gear reducer; 807. second worm gear reducer; 9. hard pipe. DETAILED DESCRIPTION

[0034] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0035] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of an embodiment. Other modifications within the scope and spirit of the present application will occur to those skilled in the art.

[0036] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0037] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0038] It should also be understood that although the present application has been described with reference to some specific examples, those skilled in the art will be able to readily implement many other equivalent forms of the present application.

[0039] The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

[0040] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present application, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that obscure the present application. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any suitable detailed structure.

[0041] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present application.

[0042] The existing pipe gallery systems between platforms are all fixed because the service time of two platforms is usually the same, and there is no need for a movable pipe gallery system. The movable associated gas recovery system proposed in this patent is based on an emerging offshore oil and gas engineering project - offshore oil field associated gas recovery and utilization, combining the two recovery methods of associated gas liquefaction and compression, and relying on the associated gas processing platform, an innovative associated gas recovery system is proposed, whose pipe gallery and output pipeline can be moved with the processing platform to another production platform to recover the associated gas of another production platform.

[0043] That is, the present application provides an associated gas recovery system, which is applied to different associated gas production platforms 1 of offshore oil fields, that is, the associated gas recovery system is movable and reusable. When the associated gas recovery of one production platform 1 is completed or the associated gas recovery of another production platform 1 is required, the associated gas recovery system can be quickly disassembled from the currently applied production platform 1, and the associated gas recovery system can be shipped to another production platform 1 where the associated gas is to be recovered by a shipping ship, and the associated gas recovery system can be installed on another production platform 1, so that the associated gas recovery system can be quickly installed and disassembled and reused.

[0044] Combination Figure 1 and Figure 2 The associated gas recovery system includes a processing platform 2, a pipeline gallery 3 and a gas transmission pipeline 5.

[0045] The processing platform 2 is provided with a liquefaction or compression processing system for liquefying or compressing the associated gas, and processing the liquefied or compressed associated gas into a form that can be transported or transferred, thereby realizing the recycling of the associated gas. The processing platform 2 can be arranged on the sea surface in a floating or movable manner. The processing platform 2 is located around the production platform 1 and can be arranged at a distance of 120 meters to 40 meters from the production platform. Of course, the distance interval between the processing platform 2 and the production platform 1 can be set according to the specific production situation. For example, the above distance interval is determined according to the environment of the sea area, etc.

[0046] The pipe gallery 3 has an installation space for accommodating a gas pipeline 5. That is, the gas pipeline 5 is arranged in the installation space of the pipe gallery 3, so that the gas transmission channel can be protected through the pipe gallery 3 to prevent the gas transmission channel from being damaged and causing leakage of associated gas. In addition, the connecting cables between the production platform 1 and the processing platform 2 can also be arranged in the installation space of the pipe gallery 3 to protect the cables. One end of the pipe gallery 3 is detachably connected to the production platform 1, and the other end of the pipe gallery 3 is connected to the processing platform 2. The pipe gallery 3 can be retracted so that when the position of the processing platform 2 moves, the pipe gallery 3 can remain connected to the processing platform 2. The movable, retractable and removable pipe gallery 3 structure is used to adapt to the external load conditions of different target production platforms 1 and target oil fields, improve installation efficiency and reduce investment costs. The movable pipe gallery 3 structure can adjust the length and height of the pipe gallery 3 according to different external environments, and can withstand appropriate bending loads to adapt to the relative movement that may occur between the production platform 1 and the processing platform 2, and adapt to the conditions of different target production platforms 1 and target oil field sea areas.

[0047] One end of the pipe gallery 3 is connected to the pipe gallery 3 interface of the target production platform 1 after adjusting the height and length. During the operation and service of the processing platform 2, the pipe gallery 3 remains fixed between the production platform 1 and the processing platform 2.

[0048] The gas pipeline 5 is arranged in the pipe gallery 3. Specifically, the gas pipeline 5 is installed in the installation space of the pipe gallery 3 so that the pipe gallery 3 can protect the gas pipeline 5. One end of the gas pipeline 5 is detachably and flexibly connected to and communicated with the production platform 1, that is, one end of the gas pipeline 5 is detachably connected to the associated gas outlet of the production platform 1, and the connection between the gas pipeline 5 and the production platform 1 can be disconnected as needed. For example, when the target production platform 1 needs to be replaced, the gas pipeline 5 can be disconnected from the gas outlet of the production platform 1. Moreover, one end of the gas pipeline 5 is flexibly connected to the gas outlet of the production platform 1, and the other end of the gas pipeline 5 is also flexibly connected to and communicated with the gas inlet of the processing platform 2, so that when the distance or height changes between the production platform 1 and the processing platform 2, the gas pipeline 5 can make adaptive adjustments to maintain the connection relationship between the gas pipeline 5 and the production pipeline. For example, affected by wind and waves at sea, the processing platform 2 installed at sea may move with the waves, which requires the gas pipeline 5 to maintain the connection and connectivity with the production platform 1 and the processing platform 2 to prevent the leakage of associated gas.

[0049] The associated gas on the production platform 1 can be transported to the processing platform 2 through the gas pipeline 5 , and the associated gas is processed by the hydraulic or compression system on the processing platform 2 .

[0050] When the pipe gallery 3 and the gas pipeline 5 are disconnected from the production platform 1, the associated gas recovery system can be connected to another production platform 1 to recover the associated gas of the other production platform 1. That is, after the associated gas of the current production platform 1 is recovered, or when the production platform 1 needs to be replaced, the pipe gallery 3 and the gas pipeline 5 can be disconnected from the ends connected to the production platform 1, so that the pipe gallery 3, the gas pipeline 5 and the processing platform 2 can be towed together by an engineering ship to the target oil field sea area, which has a production platform 1, and the production platform 1 has associated gas to be recovered. The associated gas processing platform 2 is installed at a suitable safety distance (about 20m-40m), and then connected to the target production platform 1 through the movable pipe gallery 3 and the gas pipeline 5, and the associated gas of the production platform 1 can be recovered through the processing platform 2.

[0051] In the embodiment of the present application, the pipe gallery 3 is detachably arranged on the production platform 1, and the gas pipeline 5 is arranged in the pipe gallery 3, and the gas pipeline 5 is also connected to the production platform 1 in a detachable manner. When the production platform 1 needs to be replaced, the pipe gallery 3 and the gas pipeline 5 can be detached from the production platform 1 together with the processing platform 2 and then applied to another production platform 1, thereby improving the utilization rate of the pipe gallery 3, the gas pipeline 5 and the processing platform 2, simplifying the construction process of the associated gas recovery system, and reducing the cost of associated gas recovery in offshore oil fields.

[0052] In some embodiments, the pipe gallery 3 includes a telescopic pipe, a shearing and disengaging device 4 and a connecting pipe head.

[0053] Among them, one end of the telescopic pipe is connected to one end of the shear detachment device 4, and the other end of the shear detachment device 4 is connected to the interface on the production platform 1. When the shear force at the connection between the pipe gallery 3 and the production platform 1 is greater than the limit shear force of the shear detachment device 4, the shear detachment device 4 disconnects from the production platform 1. The limit shear detachment device 4 can adopt the existing shear detachment device 4. When the shear detachment device 4 is subjected to the lateral shear force between the oil and gas production platform 1 and the movable recovery system, when a smaller lateral shear force is applied, the shear detachment device 4 can maintain the connection state and withstand the interaction of the tensile and compressive loads between the oil and gas production platform 1 and the movable pipe gallery 3. When the shear force reaches the shear force bearing limit of the shear detachment device 4, the shear detachment device 4 will be sheared and detached to achieve mechanical separation of the oil and gas production platform 1 and the movable pipe gallery 3. Prevent larger shear forces from damaging the movable associated gas recovery system or the oil and gas production platform 1.

[0054] The other end of the telescopic pipe is connected to one end of the connecting pipe head, and the other end of the connecting pipe head is connected to the connecting port on the processing platform 2.

[0055] The pipeline gallery 3 is located above the sea surface to prevent the pipeline gallery 3 from being in contact with seawater for a long time, which would affect the life of the pipeline gallery 3 and the gas pipeline 5 in the pipeline gallery 3.

[0056] In some embodiments, the shearing and detaching device 4 includes a first structural member and a second structural member, one end of the first structural member is connected to the production platform 1, the other end of the first structural member is connected to one end of the second structural member, the other end of the second structural member is connected to the telescopic pipe, the first structural member and the second structural member are connected through a shearing member, and the shearing member will break when subjected to a shearing force, that is, when the shearing force at the connection between the first structural member and the second structural member is greater than the limiting shearing force of the shearing and detaching device 4, the shearing member breaks, and the second structural member is detached from the first structural member. The shearing member can be, but is not limited to, a shearing screw.

[0057] In some embodiments, the gas delivery pipeline 5 includes a first telescopic hose, a second telescopic hose 7 and a hard pipe 9 .

[0058] One end of the first telescopic hose is connected to the air outlet of the production platform 1, and the other end of the first telescopic hose is connected to one end of the hard pipe 9. The other end of the hard pipe 9 is connected to one end of the second telescopic hose 7, and the other end of the second telescopic hose 7 is connected to the air inlet of the processing platform 2. The gas pipeline 5 is connected to the production platform 1 through the first telescopic hose, and is connected to the processing platform 2 through the second telescopic hose 7. The first telescopic hose and the second telescopic hose 7 are connected by the hard pipe 9 to form a complete set of gas pipelines 5 adapted to the structure of the pipe gallery 3.

[0059] The first telescopic hose and the second telescopic hose 7 can be metal bellows or composite hoses, and the hard pipe 9 can be a steel pipe. Of course, it is understandable that the hard pipe 9 can be made of other hard pipes, and the corresponding material can be selected according to actual production. Since there are corrosive gases in the associated gas, corrosion-resistant materials or coatings are required inside the gas pipeline 5. The gas pipeline 5 passes through the pipe gallery 3, connecting the associated gas pipeline of the production platform 1 and the associated gas pipeline of the processing platform 2, so as to transport the associated gas of the production platform 1 to the processing platform 2 for processing, so as to realize the recycling of the associated gas.

[0060] In some embodiments, in combination Figure 3 The first telescopic hose and / or the second telescopic hose 7 includes a first telescopic hose part 601 and a second telescopic hose part 602 .

[0061] The gas pipeline 5 also includes an emergency release device 8, which can be set only at one end of the gas pipeline 5 close to the production platform 1, or only at one end close to the processing platform 2, or at both ends of the gas pipeline 5 close to the production platform 1 and the processing platform 2.

[0062] For example, the emergency detachment device 8 is arranged between the first telescopic hose part 601 and the second telescopic hose part 602, and the emergency detachment device 8 has a locking mechanism 804. When the locking mechanism 804 is released, the first telescopic hose part 601 and the second telescopic hose part 602 are disconnected. When a safety accident (such as a fire, etc.) occurs on any platform (production platform 1 or processing platform 2), the processor arranged on the production platform 1 or processing platform 2 can send a control signal to the emergency detachment device 8. After receiving the control signal, the emergency detachment device 8 can be quickly disconnected to quickly block possible safety accidents. Of course, the control signal can also be sent through a remote control system.

[0063] In some embodiments, the emergency detachment device 8 is interlocked with the shear detachment device 4 so that when the telescopic hose part 1 601 is disconnected from the telescopic hose part 2 602, a signal is sent to the processor or remote control system of the processor platform, and the processor sends a disconnection signal to the shear detachment device 4 to disconnect the shear detachment device 4 from the production platform 1.

[0064] Or, when the shearing and detaching device 4 is disconnected from the production platform 1, a signal is sent to the processor, and the processor sends a disconnection signal to the emergency detaching device 8, so that the telescopic hose part 1 601 is disconnected from the telescopic hose part 2 602. Specifically, the shearing and detaching device 4 may be built with an optical fiber and a displacement sensor. When the shearing and detaching device 4 is disconnected, the two signals are cut off at the same time. The processor can learn that the above signals are cut off, and sends a disconnection signal to the emergency detaching device 8, so that the emergency detaching device 8 is disconnected in conjunction with the disconnection of the shearing and detaching device 4.

[0065] When any platform (production platform 1 or processing platform 2) overturns and the shear force at the connection between the pipe gallery 3 and the production platform 1 is greater than the limit shear force of the detachment device, the shear detachment device 4 will disconnect the connection between the pipe gallery 3 and the production platform 1, and at the same time trigger the emergency detachment device 8 in the gas pipeline 5 to disconnect the gas supply between the production platform 1 and the processing platform 2 to prevent more serious safety accidents.

[0066] In some embodiments, in combination Figure 4 The emergency release device 8 also includes a first sealing valve 801, a first driving mechanism, a second sealing valve 802 and a second driving mechanism. The first driving mechanism is connected to the first sealing valve 801, the second driving mechanism is connected to the second sealing valve 802, the first sealing valve 801 is connected to the first part of the telescopic hose 601, the second sealing valve 802 is connected to the second part of the telescopic hose 602, and the first sealing valve 801 and the second sealing valve 802 are connected through a locking mechanism 804. Specifically, the first sealing valve 801 and the second sealing valve 802 are connected through a flange 803, and a locking mechanism 804 is arranged on the outer edge of the flange 803. The locking mechanism 804 may include a clamp, a hydraulic cylinder 8041 and a locking rod 8042, and the first sealing valve 801 and the second sealing valve 802 are clamped by the clamp. When the locking mechanism 804 is released, the hydraulic cylinder 8041 of the locking mechanism 804 can push the locking rod 8042 connected to the hydraulic cylinder 8041 to realize the emergency opening of the locking mechanism 804. The first driving mechanism drives the first sealing valve 801 to close to block the first part of the telescopic hose 601, thereby preventing the associated gas from leaking from the first part of the telescopic hose 601 and causing a safety accident; similarly, the second driving mechanism drives the second sealing valve 802 to close to block the second part of the telescopic hose 602, thereby preventing the associated gas from leaking from the second part of the telescopic hose 602 and causing a safety accident.

[0067] The first sealing valve 801 and the second sealing valve 802 can be, but are not limited to, ball valves.

[0068] That is, the embodiment of the present application utilizes a combination of soft and hard gas pipelines 5 to adapt to the large curvature connection and sea conditions of the pipeline corridor 3 to the production platform 1 and the processing platform 2. At the same time, if a fire or other safety accident occurs on any platform, the gas pipeline 5 can be disconnected through the emergency release device 8 to ensure sea condition adaptability and operational safety.

[0069] In some embodiments, the combination Figure 4 The first driving mechanism includes a first hydraulic motor 805 and a first worm gear reducer 806. The first hydraulic motor 805 is connected to the first worm gear reducer 806. The first worm gear reducer 806 is connected to the first sealing valve 801. The first hydraulic motor 805 drives the first worm gear reducer to close or open the first sealing valve 801.

[0070] The second hydraulic motor (not shown in the figure) is connected to the second worm gear reducer 807 , and the second worm gear reducer 807 is connected to the second sealing valve 802 . The second hydraulic motor drives the second worm gear reducer to close or open the second sealing valve 802 .

[0071] The first hydraulic motor 805 and the second hydraulic motor can receive corresponding control signals at the same time to start or shut down the first hydraulic motor 805 and the second hydraulic motor at the same time, so as to simultaneously block the first telescopic hose part 601 and the second telescopic hose part 602 to minimize the leakage of associated gas.

[0072] In some embodiments, the shearing and disengaging device 4 includes a third hydraulic motor, which is used to receive a disconnection signal from a processor or a remote control system and provide a force to disconnect the shearing and disengaging device 4 from the production platform 1. The third hydraulic motor can be arranged on the second structural member and connected to a corresponding thrust rod to apply a force to the first structural member so that the first structural member can be disconnected from the breaking device between the second structural member.

[0073] After the service life of the processing platform 2 ends, the pipe gallery 3 is separated from the target production platform 1, and the pipe gallery 3 is recovered to the processing platform 2 through the characteristics of scalability and adjustable height. At the same time, the gas pipeline 5 is recovered and the remaining life of the gas pipeline 5 is evaluated. If the gas pipeline 5 can continue to be used, the movable pipe gallery 3 and the gas pipeline 5 can go to the next target production platform 1 with the processing platform 2 to continue to serve the recovery and utilization of associated gas in the offshore oil field. Provide technical support for offshore oil and gas projects to achieve energy conservation and carbon reduction.

[0074] Multiple embodiments of the present application are described in detail above, but the present application is not limited to these specific embodiments. Those skilled in the art can make various variations and modifications to the embodiments based on the concept of the present application, and these variations and modifications should all fall within the scope of protection required by the present application.

Claims

1. An associated gas recovery system, characterized in that: The recovery system is applied to different associated gas production platforms in offshore oil fields, including: A processing platform, which is used to liquefy or compress the associated gas and output the liquefied or compressed associated gas; the processing platform is floated on the sea surface; A pipe gallery having an installation space, one end of the pipe gallery being detachably connected to the production platform, and the other end of the pipe gallery being connected to the processing platform; the pipe gallery being retractable so that when the position of the processing platform moves, the pipe gallery can remain connected to the processing platform; the pipe gallery includes a shearing and disengaging device; A gas pipeline is arranged in the pipe gallery, one end of the gas pipeline is detachably and flexibly connected to and communicated with the production platform, and the other end of the gas pipeline is flexibly connected to and communicated with the processing platform, so that the associated gas on the production platform can be transported to the processing platform through the gas pipeline, and the gas pipeline can move with the position of the processing platform to maintain communication with the processing platform; the gas pipeline includes an emergency release device; The emergency detachment device and the shear detachment device are interlocked with each other. When the locking mechanism of the emergency detachment device is released or the shear detachment device is disconnected from the production platform, a signal is sent to the processor. The processor sends a disconnection signal to the shear detachment device or the emergency detachment device based on the signal. The associated gas recovery system can be connected to another production platform to recover the associated gas of the other production platform.

2. The associated gas recovery system according to claim 1, characterized in that: The pipe gallery includes telescopic pipes and connecting pipe heads; One end of the telescopic pipe is connected to one end of the shear detachment device, and the other end of the shear detachment device is connected to the production platform. When the shear force at the connection between the pipe gallery and the production platform is greater than the limit shear force of the shear detachment device, the shear detachment device is disconnected from the production platform; The other end of the telescopic pipe is connected to one end of the connecting pipe head, and the other end of the connecting pipe head is connected to the processing platform.

3. The associated gas recovery system according to claim 2, characterized in that: The shear detachment device includes a first structural member and a second structural member, one end of the first structural member is connected to the production platform, the other end of the first structural member is connected to one end of the second structural member, and the other end of the second structural member is connected to the telescopic pipe. When the shear force at the connection between the first structural member and the second structural member is greater than the limit shear force of the shear detachment device, the second structural member detaches from the first structural member.

4. The associated gas recovery system according to claim 2, characterized in that: The gas pipeline comprises a first telescopic hose, a second telescopic hose and a hard pipe; One end of the first telescopic hose is connected to the air outlet of the production platform, and the other end of the first telescopic hose is connected to one end of the hard pipe; the other end of the hard pipe is connected to one end of the second telescopic hose, and the other end of the second telescopic hose is connected to the air inlet of the processing platform.

5. The associated gas recovery system according to claim 4, characterized in that: The first telescopic hose and / or the second telescopic hose comprises a first telescopic hose part and a second telescopic hose part; The emergency detachment device is arranged between the first telescopic hose portion and the second telescopic hose portion. When the locking mechanism of the emergency detachment device is released, the first telescopic hose portion is disconnected from the second telescopic hose portion.

6. The associated gas recovery system according to claim 5, characterized in that: When the first part of the telescopic hose is disconnected from the second part of the telescopic hose, a signal is sent to the processor, and the processor sends a disconnection signal to the shearing and separating device to disconnect the shearing and separating device from the production platform; or, When the shearing and detaching device is disconnected from the production platform, a signal is sent to the processor, and the processor sends a disconnection signal to the emergency detaching device to disconnect the first part of the telescopic hose from the second part of the telescopic hose.

7. The associated gas recovery system according to claim 5, characterized in that: The emergency release device also includes a first sealing valve, a first driving mechanism, a second sealing valve and a second driving mechanism. The first sealing valve is connected to the first portion of the telescopic hose, and the second sealing valve is connected to the second portion of the telescopic hose. The first sealing valve and the second sealing valve are connected via the locking mechanism. When the locking mechanism is released, the first driving mechanism drives the first sealing valve to close, and the second driving mechanism drives the second sealing valve to close.

8. The associated gas recovery system according to claim 7, characterized in that: The first driving mechanism includes a first hydraulic motor and a first worm gear reducer, the first hydraulic motor is connected to the first worm gear reducer, the first worm gear reducer is connected to the first sealing valve, and the first hydraulic motor drives the first worm gear reducer to close or open the first sealing valve; The second driving mechanism includes a second hydraulic motor and a second worm gear reducer, the second hydraulic motor is connected to the second worm gear reducer, the second worm gear reducer is connected to the second sealing valve, and the second hydraulic motor drives the second worm gear reducer to close or open the second sealing valve.

9. The associated gas recovery system according to claim 6, characterized in that: The shear detachment device comprises a third hydraulic motor, and the third hydraulic motor is used to receive a disconnection signal from the processor and provide a force to disconnect the shear detachment device from the production platform.

10. The associated gas recovery system according to claim 4, characterized in that: The first telescopic hose and the second telescopic hose are metal bellows or composite hoses, the hard pipe is a steel pipe, and the inner wall of the gas pipeline is provided with an anti-corrosion coating.

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