Gas supply system

Abstract

This utility model discloses a gas supply system, including at least two gas supply devices. Each gas supply device includes an air compressor for compressing gas, a gas dryer for removing moisture and / or impurities from the compressed gas, and a first gas pipeline for connecting to an external system. In each gas supply device, the outlet of the air compressor is connected to the first gas pipeline via the gas dryer. Furthermore, the outlets of the air compressors of at least two gas supply devices are also connected, as are the first pipelines of at least two gas supply devices. The at least two gas supply devices of this utility model form a ring network structure. The originally independent air compressors and gas dryers can supply gas to each other and supplement each other, achieving multi-source ring gas supply. The air compressors and gas dryers serve as backups for each other, improving redundancy and significantly enhancing the stability of the gas supply pressure of each device. Simultaneously, it increases gas supply utilization, reduces overall energy consumption, and avoids resource waste.

Description

Technical Field

[0001] This utility model relates to the field of marine oil exploration and development technology, and in particular to a gas supply system. Background Technology

[0002] Offshore oil exploration and development platforms have production air compressors (or instrument air compressors), nitrogen air compressors, and drilling air compressors. The production air compressors supply air independently to the utility gas system and the instrument gas system, the nitrogen air compressors supply air independently to the nitrogen system, and the drilling air compressors supply air independently to the drilling gas system.

[0003] During normal use, the following shortcomings exist:

[0004] (1) Each air compressor is independent of the others, resulting in poor air supply stability.

[0005] (2) Insufficient air supply from production air compressors (instrument air compressors): After the transformation of the automatic control project, the platform has insufficient air production from production air compressors and the air volume of instruments does not meet the normal production needs.

[0006] (3) Excessive air supply from nitrogen air compressor and drilling air compressor: The nitrogen air compressor and drilling air compressor have a large surplus of air production. The utilization rate of nitrogen air compressor is only 45.5%, and the utilization rate of drilling air compressor is only 10% during non-drilling and well repair periods.

[0007] (4) High maintenance risk: The working mode of one main and one standby means that the failure or maintenance of any air compressor will bring great risks to the stable operation of the platform.

[0008] (5) Pipeline corrosion caused production shutdown: Since the platform was put into operation, corrosion perforation of the instrument gas pipeline has occurred many times, resulting in insufficient gas supply pressure for the instrument air and causing production shutdown. Utility Model Content

[0009] The technical problem to be solved by this utility model is to provide an air supply system that addresses at least one defect in the related technologies mentioned in the background: that each air compressor is independent of the others and the air supply stability is poor.

[0010] The technical solution adopted by this utility model to solve its technical problem is: to construct a gas supply system, including at least two gas supply devices, each of the gas supply devices including an air compressor for compressing gas, a gas drying device for removing moisture and / or impurities from the compressed gas, and a first gas pipeline for connecting to an external system.

[0011] In each of the gas supply devices, the outlet of the air compressor is connected to the first gas pipeline via the gas drying device; and the outlets of the air compressors of at least two of the gas supply devices are also connected, as are the first pipelines of at least two of the gas supply devices.

[0012] In some embodiments, at least two gas supply devices include a first gas supply device and at least one second gas supply device, wherein the gas supply capacity of the second gas supply device is greater than that of the first gas supply device;

[0013] In this configuration, the outlet of the air compressor of at least one of the second air supply devices is also connected to the outlet of the air compressor of the first air supply device, and the first air line of at least one of the second air supply devices is also connected to the first air line of the first air supply device.

[0014] In some embodiments, the gas supply system includes at least two second gas supply devices;

[0015] The outlets of at least two air compressors of the second air supply device are also connected to each other, and the first air line of the second air supply device is connected to the first air line of the first air supply device through a first bidirectional air supply assembly.

[0016] In some embodiments, a first bidirectional gas supply component is provided between the first gas line of the second gas supply device and the first gas line of the first gas supply device.

[0017] In some embodiments, the first bidirectional air supply assembly includes a first one-way valve and a first self-regulating valve;

[0018] The first self-regulating valve is connected to both ends of the first check valve, and the conduction direction of the first check valve is towards the second air supply device or the first air supply device.

[0019] In some embodiments, the outlets of the air compressors of every two second air supply devices are connected via a second bidirectional air supply assembly.

[0020] In some embodiments, the second bidirectional gas supply assembly includes a second one-way valve and a second self-regulating valve;

[0021] The second self-regulating valve is connected to both ends of the second check valve, and the conduction direction of the second check valve is toward one of the second air supply devices.

[0022] In some embodiments, a node segment is provided on the first gas pipeline of the first gas supply device;

[0023] One end of the node segment is connected to the first gas pipeline of at least one of the second gas supply devices, and the other end of the node segment is connected to the first gas pipeline of at least one of the second gas supply devices.

[0024] In some embodiments, the node segment includes multiple nodes, and each node has isolation valves at both ends.

[0025] In some embodiments, the first air supply device further includes a second air line connected to the outlet of the air compressor.

[0026] By implementing this utility model, the following beneficial effects can be achieved:

[0027] The gas supply system of this utility model has at least two gas supply devices forming a ring network structure. The originally independent air compressor and gas drying device can supply gas to each other and supplement each other, realizing multi-source ring gas supply. The air compressor and gas drying device serve as backups for each other, improving redundancy capacity, greatly improving the stability of the gas supply pressure of each gas supply device, while improving the gas supply utilization rate, reducing overall energy consumption, and avoiding resource waste. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0029] Figure 1 A logical structure diagram of an embodiment of the gas supply system of this utility model is shown. Detailed Implementation

[0030] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0032] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "located in," and "located in" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections, mechanical connections or chemical connections, direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] It should be noted that the term "connection" below refers to a physical structural connection and does not exclusively limit the connectivity or gas flow direction. The connection can be a direct pipe connection or a connection via other components. Furthermore, the orientation of the check valve mentioned below refers to the gas flow direction, not its spatial orientation.

[0035] Some embodiments of this utility model disclose a gas supply system, including at least two gas supply devices. Understandably, the at least two can be two, three, or any number. Each gas supply device includes an air compressor for compressing gas, a gas drying device for removing moisture and / or impurities from the compressed gas, and a first gas pipeline for connecting to an external system.

[0036] In each air supply unit, the outlet of the air compressor is connected to the first air pipeline via a gas drying device. Furthermore, the outlets of the air compressors of at least two air supply units are also connected, and the first pipelines of at least two air supply units are also connected.

[0037] In this embodiment, the air supply system forms a ring network structure with at least two air supply devices. Previously independent air compressors and gas dryers can supply and supplement each other, achieving multi-source ring air supply. The air compressors and gas dryers serve as backups for each other, improving redundancy and significantly enhancing the stability of the air supply pressure from each device. This also increases air supply utilization, reduces overall energy consumption, and avoids resource waste. Furthermore, because the air compressors are interconnected, the number of operating air compressors can be reduced according to actual needs.

[0038] In some embodiments, each air supply unit includes at least two air compressors to form an air compressor unit. Understandably, at least two can be two, three, or any number of compressors.

[0039] In some embodiments, at least two air supply devices include a first air supply device and at least one second air supply device. The air supply capacity of the second air supply device is greater than that of the first air supply device, allowing the second air supply device with a larger (or excess) air supply to supplement the air supply of the first air supply device with a smaller air supply. The outlet of the air compressor of at least one second air supply device is also connected to the outlet of the air compressor of the first air supply device, and the first air line of at least one second air supply device is also connected to the first air line of the first air supply device. Understandably, at least one can be one, two, three, or any number. The first air supply device also includes a second air line connected to the outlet of the air compressor.

[0040] For example, such as Figure 1 As shown, the first gas supply unit supplies gas to both the utility gas system and the instrument gas system. The air compressor in the first gas supply unit is a production air compressor 11, and the gas drying device in the first gas supply unit is an instrument gas drying device 12. The first gas pipeline of the first gas supply unit is an instrument gas pipeline 13. The instrument gas system includes multiple instrument gas user terminals 7. The instrument gas pipeline 13 has node sections, each node connecting to one instrument gas user terminal 7 (e.g., air damper, regulating valve, shut-off valve, wellhead panel, sprinkler system, etc.). The second pipeline of the first gas supply unit is a utility gas pipeline 14, which connects to the utility gas system.

[0041] The second gas supply device is used to supply gas to the nitrogen system (such as a nitrogen generation system). The air compressor of the second gas supply device is a nitrogen air compressor 21, the gas drying device of the second gas supply device is a nitrogen drying device 22, the first gas line of the second gas supply device is a nitrogen line 23, the nitrogen line 23 is used to connect to the nitrogen system, and the nitrogen line 23 is also connected to the instrument gas line 13.

[0042] Alternatively, the second gas supply device is used to supply gas to the drilling gas system, specifically for drill bit cooling, cuttings removal, and downhole tool driving. The air compressor of the second gas supply device is a drilling air compressor 31, the gas drying device of the second gas supply device is a drilling gas drying device 32, the first gas pipeline of the second gas supply device is a drilling gas pipeline 33, the drilling gas pipeline 33 is connected to the drilling gas system, and the drilling gas pipeline 33 is also connected to the instrument gas pipeline 13.

[0043] In some embodiments, the air supply system includes at least two second air supply devices, the outlets of the air compressors of the at least two second air supply devices are connected to the outlet of the air compressor of the first air supply device, the outlets of the air compressors of the at least two second air supply devices are also connected to each other, and the first air lines of the at least two second air supply devices are all connected to the first air line of the first air supply device. It is understood that "at least two" can be two, three, or any number.

[0044] For example, such as Figure 1As shown, the first gas supply unit supplies gas to both the utility gas system and the instrument gas system. The air compressor in the first gas supply unit is a production air compressor 11, and the gas drying device in the first gas supply unit is an instrument gas drying device 12. The first gas pipeline of the first gas supply unit is an instrument gas pipeline 13. The instrument gas system includes multiple instrument gas user terminals 7. The instrument gas pipeline 13 has node sections, each node connecting to one instrument gas user terminal 7 (e.g., air damper, regulating valve, shut-off valve, wellhead panel, sprinkler system, etc.). The second pipeline of the first gas supply unit is a utility gas pipeline 14, which connects to the utility gas system.

[0045] One of the second gas supply devices is used to supply gas to the nitrogen system (such as a nitrogen generation system). The air compressor of the second gas supply device is a nitrogen air compressor 21, the gas drying device of the second gas supply device is a nitrogen drying device 22, the first gas line of the second gas supply device is a nitrogen line 23, the nitrogen line 23 is used to connect to the nitrogen system, and the nitrogen line 23 is also connected to the instrument gas line 13.

[0046] Another second gas supply device is used to supply gas to the drilling gas system. The air compressor of the second gas supply device is a drilling air compressor 31, the gas drying device of the second gas supply device is a drilling gas drying device 32, the first gas pipeline of the second gas supply device is a drilling gas pipeline 33, the drilling gas pipeline 33 is connected to the drilling gas system, and the drilling gas pipeline 33 is also connected to the instrument gas pipeline 13.

[0047] The drilling air compressor 31 and the drilling gas drying device 32 can supply air to the drilling gas system, the utility gas system, the instrument gas system and the nitrogen system. The nitrogen air compressor 21 and the nitrogen drying device 22 can supply air to the drilling gas system, the utility gas system, the instrument gas system and the nitrogen system. The nitrogen air compressor 21 and the drilling air compressor 31 are backups for each other, and the nitrogen drying device 22 and the drilling gas drying device 32 are backups for each other and can supply air to each other.

[0048] In some embodiments, the first gas line of the second gas supply device is connected to the first gas line of the first gas supply device through a first bidirectional gas supply component. The first bidirectional gas supply component is used to enable the gas drying device of the first gas supply device and the gas drying device of the second gas supply device to supply gas to each other, and to determine the gas supply priority of the gas drying device of the first gas supply device and the gas drying device of the second gas supply device.

[0049] The first bidirectional gas supply assembly includes a first one-way valve 41 and a first self-regulating valve 42. The first self-regulating valve 42 is connected to both ends of the first one-way valve 41, and the conduction direction of the first one-way valve 41 is towards the second gas supply device or the first gas supply device.

[0050] For example, to ensure stable pressure in nitrogen pipeline 23 (or the outlet of nitrogen dryer 22), a first bidirectional gas supply assembly is provided between nitrogen pipeline 23 and instrument gas pipeline 13, enabling mutual backup use of instrument gas dryer 12 and nitrogen dryer 22. The first one-way valve 41 is directed towards nitrogen dryer 22. When the pressure in nitrogen pipeline 23 (or the outlet of nitrogen dryer 22) is too low, gas from instrument gas dryer 12 can be supplied to nitrogen pipeline 23 (or the outlet of nitrogen dryer 22) through the first one-way valve 41. When the pressure in instrument gas pipeline 13 (or the outlet of instrument gas dryer 12) is too low, nitrogen from nitrogen dryer 22 can be supplied to instrument gas pipeline 13 (or the outlet of instrument gas dryer 12) through the first self-regulating valve 42. If the pressure of nitrogen line 23 (or the outlet of nitrogen dryer 22) is lower than the set pressure point of the first self-regulating valve 42, the first self-regulating valve 42 will automatically close to prioritize ensuring the pressure of nitrogen line 23 (or the outlet of nitrogen dryer 22).

[0051] And / or, to address the situation where no gas is available in the drilling area after a failure of the drilling gas drying device 32, and to ensure stable pressure in the instrument gas line 13 (or the outlet of the instrument gas drying device 12), a first bidirectional gas supply assembly is provided between the drilling gas line 33 and the instrument gas line 13. This assembly allows for mutual backup use of the instrument gas drying device 12 and the drilling gas drying device 32, wherein the first one-way valve 41 is directed towards the instrument gas drying device 12. When the pressure in the instrument gas line 13 (or the outlet of the instrument gas drying device 12) is too low, gas from the drilling gas drying device 32 can be supplied to the instrument gas line 13 (or the outlet of the instrument gas drying device 12) through the first one-way valve 41. When the pressure in the drilling gas line 33 (or the outlet of the drilling gas drying device 32) is too low, gas from the instrument gas drying device 12 can be supplied to the drilling gas line 33 (or the outlet of the drilling gas drying device 32) through the first self-regulating valve 42. If the pressure of the instrument gas line 13 (or the outlet of the instrument gas dryer 12) is lower than the set pressure point of the first self-regulating valve 42, the first self-regulating valve 42 will automatically close to prioritize ensuring the pressure of the instrument gas line 13 (or the outlet of the instrument gas dryer 12).

[0052] It should be noted that the set pressure point of the first self-regulating valve 42 between the nitrogen line 23 and the instrument gas line 13 may be the same as or different from the set pressure point of the first self-regulating valve 42 between the drilling gas line 33 and the instrument gas line 13.

[0053] In some embodiments, the outlets of the air compressors of each pair of second air supply devices are connected by a second bidirectional air supply assembly, which is used to enable mutual air supply between the air compressors of the two second air supply devices and to determine the air supply priority between the air compressors of the two second air supply devices.

[0054] The second bidirectional air supply assembly includes a second one-way valve 51 and a second self-regulating valve 52. The second self-regulating valve 52 is connected to both ends of the second one-way valve 51, and the conduction direction of the second one-way valve 51 is towards one of the second air supply devices.

[0055] For example, such as Figure 1 As shown, to address the issue of drilling air compressor 31 malfunctioning or excessive air consumption at the drilling end lowering the outlet pressure of nitrogen air compressor 21, a second bidirectional air supply assembly is installed between the outlet of drilling air compressor 31 and the outlet of nitrogen air compressor 21. The conduction direction of the second one-way valve 51 faces nitrogen air compressor 21. When the outlet pressure of nitrogen air compressor 21 is too low, other air from drilling air compressor 31 can be supplied to the outlet of nitrogen air compressor 21 through the second one-way valve 51. When the outlet pressure of drilling air compressor 31 is too low, nitrogen from nitrogen air compressor 21 can be supplied to the outlet of drilling air compressor 31 through the second self-regulating valve 52. If the outlet pressure of nitrogen air compressor 21 is lower than the set pressure point of the second self-regulating valve 52, the second self-regulating valve 52 automatically closes to prioritize ensuring the outlet pressure of nitrogen air compressor 21.

[0056] In some embodiments, a node segment is provided on the first gas pipeline of the first gas supply device, one end of the node segment is connected to the first gas pipeline of at least one second gas supply device, and the other end of the node segment is connected to the first gas pipeline of at least one second gas supply device.

[0057] For example, such as Figure 1 As shown, the instrument gas pipeline 13 is provided with a node section, one end of which is connected to the nitrogen pipeline 23, and the other end of which is connected to the drilling gas pipeline 33.

[0058] In some embodiments, the node segment includes multiple nodes, each with isolation valves 6 at both ends. When corrosion perforation occurs in the node segment or the connecting pipeline between the node and the instrument gas user terminal 7, the isolation valves 6 can be used for segmental isolation, allowing for repair of the leak point without production shutdown. This ensures normal gas supply to both ends of the faulty node and prevents unexpected production shutdowns at all instrument gas user terminals 7 due to low pressure caused by a single leak. In contrast, in related technologies, if corrosion damage occurs anywhere in the gas pipeline, all downstream users will stop receiving gas, severely impacting production stability. For example, the isolation valve 6 is a ball valve; however, this is merely an example and not intended to limit the scope of this application, and other types of valves may also be used.

[0059] Under normal production conditions, nitrogen air compressor 21 supplies air to the nitrogen system, utility gas system, and instrument gas system, while production air compressor 11 is in a standby shutdown state during normal production. When the pressure in the instrument gas system is insufficient, production air compressor 11 automatically starts to supply air to the instrument gas system. The air output of each air compressor is not the same, and the start-up and shutdown of the air compressors can be optimized according to the system's air consumption. When the air consumption is high, the air compressor with a high air output is started; when the air consumption is low, it can switch to the air compressor with a low air output, achieving the effect of energy saving and emission reduction.

[0060] In some embodiments, each air supply device also includes a buffer container located between the air compressor outlet and the gas drying device. The air compressor can automatically start and stop based on the pressure in the buffer container to cope with various complex operating conditions and sudden failures, realizing the automatic redundancy backup function of the air compressor.

[0061] It is understood that the above embodiments only illustrate some implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can freely combine the above embodiments or technical features without departing from the concept of this utility model, and can also make several modifications and improvements, all of which fall within the protection scope of this utility model. That is, the embodiments described "in some embodiments" can be freely combined with any of the preceding and following embodiments. Therefore, all equivalent transformations and modifications made within the scope of the claims of this utility model should fall within the coverage of the claims of this utility model.

Claims

1. A gas supply system, characterized by, It includes at least two gas supply devices, each of which includes an air compressor for compressing gas, a gas dryer for removing moisture and / or impurities from the compressed gas, and a first gas pipeline for connecting to an external system. In each of the gas supply devices, the outlet of the air compressor is connected to the first gas pipeline via the gas drying device; and the outlets of the air compressors of at least two of the gas supply devices are also connected, as are the first pipelines of at least two of the gas supply devices.

2. The gas supply system of claim 1, wherein At least two gas supply devices include a first gas supply device and at least one second gas supply device, wherein the gas supply capacity of the second gas supply device is greater than that of the first gas supply device; In this configuration, the outlet of the air compressor of at least one of the second air supply devices is also connected to the outlet of the air compressor of the first air supply device, and the first air line of at least one of the second air supply devices is also connected to the first air line of the first air supply device.

3. The gas supply system of claim 2, wherein, The gas supply system includes at least two second gas supply devices; The outlets of the air compressors of at least two of the second air supply devices are also connected to each other, and the first air lines of at least two of the second air supply devices are all connected to the first air line of the first air supply device.

4. The gas supply system according to claim 2 or 3, characterized in that, The first gas line of the second gas supply device is connected to the first gas line of the first gas supply device through a first bidirectional gas supply component.

5. The gas supply system according to claim 4, characterized in that, The first bidirectional air supply assembly includes a first one-way valve (41) and a first self-regulating valve (42); The first self-regulating valve (42) is connected to both ends of the first check valve (41), and the conduction direction of the first check valve (41) is toward the second gas supply device or the first gas supply device.

6. The gas supply system according to claim 3, characterized in that, The outlets of the air compressors of each pair of the second air supply devices are connected by a second bidirectional air supply assembly.

7. The gas supply system according to claim 6, characterized in that, The second bidirectional air supply assembly includes a second one-way valve (51) and a second self-regulating valve (52); The second self-regulating valve (52) is connected to both ends of the second check valve (51), and the conduction direction of the second check valve (51) is toward one of the second air supply devices.

8. The gas supply system according to claim 3, characterized in that, The first gas supply device has a node section on its first gas pipeline. One end of the node segment is connected to the first gas pipeline of at least one of the second gas supply devices, and the other end of the node segment is connected to the first gas pipeline of at least one of the second gas supply devices.

9. The gas supply system according to claim 8, characterized in that, The node segment includes multiple nodes, and each node is provided with an isolation valve (6) at both ends.

10. The gas supply system according to claim 2, characterized in that, The first air supply device also includes a second air pipeline, which is connected to the outlet of the air compressor.

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