Offshore platform single well control module with remote production recovery function

Abstract

The application discloses a single-well control module of an offshore platform with a remote production recovery function. When a remote well is closed, a second electromagnetic valve is first controlled to be closed, hydraulic oil on a third pilot oil supply main line flows into an oil tank of a main system through a pilot pressure oil return branch, an actuator of a wing safety valve loses hydraulic control pressure, and thus the wing safety valve is closed. Then, a first electromagnetic valve is controlled to be closed, hydraulic oil on a second pilot oil supply main line flows into the oil tank of the main system through the pilot pressure oil return branch, an actuator of a main safety valve loses the hydraulic control pressure, and thus the main safety valve is closed. In this way, a Christmas tree of a wellhead is closed. When the Christmas tree of the wellhead needs to be remotely opened, the first electromagnetic valve and the second electromagnetic valve are controlled to be opened in sequence, the main safety valve and the wing safety valve are opened in sequence, and thus the Christmas tree is remotely opened. Therefore, the single-well control module can remotely close and open the Christmas tree of the wellhead, the continuity of production is improved, and manual field operation is avoided.

Description

Technical Field

[0001] This invention relates to the field of wellhead safety control system technology, and in particular to a single-well control module for offshore platforms with remote production recovery function. Background Technology

[0002] Offshore unmanned platforms are core facilities for deep-sea oil and gas development. The wellhead control panel serves as a safety barrier for oil and gas well production, undertaking key functions such as pressure monitoring, valve status control, and emergency shutdown. In the traditional mode, the platform is manned, and the wellhead control panel is operated on-site to control the opening and closing of the wellhead tree. When the platform's production is shut down, personnel are also required to go to the site to manually reset the hand valve of the wellhead panel so that the wellhead tree can be put back into production.

[0003] Therefore, the traditional wellhead control panel is highly dependent on human labor. In extreme environments such as typhoon weather, manual on-site well shut-in operations are risky and cannot meet the needs of remote well shut-in and production recovery. Summary of the Invention

[0004] This invention provides a single-well control module for offshore platforms with remote production recovery capabilities. It can remotely shut down and open the main safety valve and wing safety valve of the wellhead Christmas tree, thereby improving production continuity, reducing unplanned downtime of the Christmas tree, eliminating the need for manual on-site operations, and reducing the risk of manual on-site operations during extreme weather.

[0005] This invention provides a single-well control module for offshore platforms with remote production recovery capabilities, which is applied in a wellhead safety control system. The module includes an emergency shutdown level 1 pilot branch, an emergency shutdown level 2 / 3 input branch, a downhole safety valve supply branch, a main safety valve supply branch, a wing safety valve supply branch, a third pilot supply main branch, a first solenoid valve, and a second solenoid valve.

[0006] The output end of the emergency shut-off level 1 pilot branch is connected to the first pilot oil supply main line via the main shut-off hand pull valve. The output end of the first pilot oil supply main line is connected to the first hydraulic control three-way valve group. The first hydraulic control three-way valve group is connected to the downhole safety valve oil supply branch.

[0007] The emergency shut-off 2 / 3 level input branch is connected to the inflow section of the first pilot oil supply main line. The output end of the emergency shut-off 2 / 3 level input branch is connected to the second pilot oil supply main line via the second-level shut-off hand pull valve. The output end of the second pilot oil supply main line is connected to the second hydraulic control three-way valve group. The second hydraulic control three-way valve group is connected to the main safety valve oil supply branch.

[0008] The first solenoid valve is connected to the inflow section of the second pilot oil supply main line, and the first solenoid valve is connected to the pilot pressure return oil branch through the first-stage solenoid valve return oil branch.

[0009] The input end of the third pilot oil supply main circuit is connected to the inflow section of the second pilot oil supply main circuit via a three-stage shut-off hand-operated valve and is located downstream of the first solenoid valve. The output end of the third pilot oil supply main circuit is connected to the third hydraulic control three-way valve group, and the third hydraulic control three-way valve group is connected to the oil supply branch of the wing safety valve.

[0010] The second solenoid valve is connected to the inflow section of the third pilot oil supply main line, and the second solenoid valve is connected to the pilot pressure return oil branch through the secondary solenoid valve return oil branch.

[0011] In some embodiments, the inflow section of the first pilot oil supply main line is connected to the pilot pressure return oil branch via a relay valve, and the emergency shut-off 2 / 3 level input branch is connected to the relay valve.

[0012] In some embodiments, the return oil end of the main shut-off manual valve is connected to the pilot pressure return oil branch via a primary pilot return oil branch;

[0013] The return oil end of the secondary shut-off hand valve is connected to the pilot pressure return oil branch via the secondary pilot return oil branch;

[0014] The return oil end of the three-stage shut-off hand valve is connected to the pilot pressure return oil branch via the three-stage pilot return oil branch.

[0015] In some embodiments, the return end of the first hydraulically controlled three-way valve assembly is connected to the return branch of the downhole safety valve.

[0016] The return end of the second hydraulic three-way valve assembly is connected to the return branch of the main safety valve;

[0017] The return oil end of the third hydraulic control three-way valve group is connected to the return oil branch of the wing safety valve.

[0018] In some embodiments, the first hydraulically controlled three-way valve group includes a first three-way valve, a first check valve, and a first relief valve. The pilot end of the first three-way valve is connected to the output end of the first pilot oil supply main line. Both the first three-way valve and the first check valve are connected to the oil supply branch of the downhole safety valve. The two ends of the first relief valve are respectively connected to the oil supply branch of the downhole safety valve and the oil return branch of the downhole safety valve. The oil return end of the first three-way valve is connected to the oil return branch of the downhole safety valve.

[0019] The second hydraulic three-way valve assembly includes a second three-way valve, a second check valve, and a second relief valve. The pilot end of the second three-way valve is connected to the second pilot oil supply main line. Both the second three-way valve and the second check valve are connected to the oil supply branch of the main safety valve. The two ends of the second relief valve are respectively connected to the oil supply branch of the main safety valve and the oil return branch of the main safety valve. The oil return end of the second three-way valve is connected to the oil return branch of the main safety valve.

[0020] The third hydraulically controlled three-way valve group includes a third three-way valve, a third check valve, and a third relief valve. The pilot end of the third three-way valve is connected to the third pilot oil supply main line. Both the third three-way valve and the third check valve are connected to the oil supply branch of the wing safety valve. The third relief valve is connected to the oil return branch of the wing safety valve. The oil return end of the third three-way valve is connected to the oil return branch of the wing safety valve.

[0021] In some embodiments, the first relief valve / the second relief valve / the third relief valve includes a proportional unloading valve.

[0022] In some embodiments, a first one-way throttle valve and a first indicator located downstream of the first one-way throttle valve are provided on the first pilot oil supply main line.

[0023] A second one-way throttle valve and a second indicator located downstream of the second one-way throttle valve are provided on the second pilot oil supply main line;

[0024] A third indicator is installed on the third pilot oil supply line.

[0025] In some embodiments, the inflow section of the first pilot oil supply main line is connected to a main shut-off manual valve pilot branch, which is connected to the pilot end of the main shut-off manual valve.

[0026] In some embodiments, a first pressure gauge and a first pressure transmitter are connected sequentially on the output branch of the downhole safety valve and on the downstream side of the first hydraulically controlled three-way valve group.

[0027] A second pressure gauge and a second pressure transmitter are connected sequentially on the output branch of the main safety valve and downstream of the second hydraulic three-way valve group.

[0028] A third pressure gauge and a third pressure transmitter are connected sequentially on the output branch of the wing safety valve and downstream of the third hydraulic three-way valve group.

[0029] In some embodiments, the main shut-off manual valve is provided with a first valve position sensing switch, which is connected to a first shut-off indicator light. The first valve position sensing switch is used to sense whether the lever of the main shut-off manual valve is in the shut-off state.

[0030] The secondary shut-off manual valve is equipped with a second valve position sensor switch, which is connected to a second shut-off indicator light. The second valve position sensor switch is used to sense whether the lever of the secondary shut-off manual valve is in the shut-off state.

[0031] The three-stage shut-off manual pull valve is equipped with a third valve position sensor switch, which is connected to a third shut-off indicator light. The third valve position sensor switch is used to sense whether the lever of the three-stage shut-off manual pull valve is in the shut-off state.

[0032] As can be seen from the above technical solutions, the present invention has the following advantages:

[0033] The wellhead safety control system, through emergency shutdown of the first-stage pilot branch, the first pilot oil supply main line, and the first hydraulically controlled three-way valve group, controls the opening of the downhole safety valve oil supply branch to activate the downhole safety valve actuator. Simultaneously, the wellhead safety control system, through emergency shutdown of the second / third-stage input branches, the second pilot oil supply main line, and the second hydraulically controlled three-way valve group, controls the opening of the main safety valve oil supply branch to activate the main safety valve actuator. The wellhead safety control system, through the third pilot oil supply main line and the third hydraulically controlled three-way valve group, controls the opening of the wing safety valve oil supply branch to activate the wing safety valve actuator. Thus, the downhole safety valve, main safety valve, and wing safety valve are opened sequentially to open the wellhead tree and facilitate the transfer of oil or natural gas. When well shut-in is required, the second solenoid valve can be closed first, allowing hydraulic oil on the third pilot oil supply main line to flow into the system via the pilot pressure return branch. Inside the control box, the third hydraulically controlled three-way valve assembly is depressurized, causing the actuator of the wing safety valve to lose hydraulic control pressure, thus closing the wing safety valve. Then, the first solenoid valve is closed, allowing hydraulic oil from the second pilot supply main line to flow into the system's oil tank via the pilot pressure return branch. This depressurizes the second hydraulically controlled three-way valve assembly, causing the actuator of the main safety valve to lose hydraulic control pressure, thus closing the main safety valve. This achieves the closure of the wellhead's production tree. When remote opening of the wellhead's production tree is required, the first and second solenoid valves can be opened sequentially, thus opening the main safety valve and the wing safety valve, thereby opening the wellhead's production tree. Therefore, this single-well control module can remotely close and open the wellhead's production tree, improving production continuity, reducing unplanned downtime of the production tree, eliminating the need for manual on-site operations, and reducing the risks associated with manual on-site operations during extreme weather. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in this invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0035] Figure 1 This is a system schematic diagram of a single-well control module for an offshore platform with remote production recovery function, according to an embodiment of this application.

[0036] Figure 2 yes Figure 1 The schematic diagram of the first hydraulically controlled three-way valve group and its connecting pipeline is shown in the system schematic diagram of the single-well control module shown in the figure.

[0037] Figure 3 yes Figure 1 The schematic diagram of the second hydraulically controlled three-way valve group and its connecting pipeline is shown in the system schematic diagram of the single-well control module shown in the figure.

[0038] Figure 4 yes Figure 1 The diagram shown in the system schematic of the single-well control module is a schematic diagram of the third hydraulic control three-way valve group and its connecting pipeline.

[0039] The meanings of the reference numerals in the attached figures are as follows:

[0040] 1. Emergency shut-off of Level 1 pilot branch; 2. Emergency shut-off of Level 2 / 3 input branches; 3. Downhole safety valve supply branch; 4. Main safety valve supply branch; 5. Wing safety valve supply branch; 6. Third pilot main supply branch; 7. First solenoid valve; 8. Second solenoid valve; 9. Main shut-off manual valve; 10. First pilot main supply branch; 11. First hydraulically controlled three-way valve assembly; 12. Secondary shut-off manual valve; 13. Second pilot main supply branch 14. Second hydraulically controlled three-way valve assembly; 15. First-stage solenoid valve return branch; 16. Pilot pressure return branch; 17. Three-stage shut-off manual valve; 18. Third hydraulically controlled three-way valve assembly; 19. Second-stage solenoid valve return branch; 20. Relay valve; 21. First-stage pilot return branch; 22. Second-stage pilot return branch; 23. Third-stage pilot return branch; 24. Downhole safety valve return branch; 25. Main safety valve return branch; 2 6. Wing safety valve return branch; 27. First three-way valve; 28. First check valve; 29. ​​First relief valve; 30. Second three-way valve; 31. Second check valve; 32. Second relief valve; 33. Third three-way valve; 34. Third check valve; 35. Third relief valve; 36. First one-way throttle valve; 37. First indicator; 38. Second one-way throttle valve; 39. Second indicator; 40. Third indicator; 41. Main shut-off manual valve pilot branch; 42. First pressure gauge; 43. First pressure transmitter; 44. Second pressure gauge; 45. Second pressure transmitter; 46. Third pressure gauge; 47. Third pressure transmitter; 48. First valve position sensor switch; 49. Second valve position sensor switch; 50. Third valve position sensor switch; 51. Downhole safety valve output branch; 52. Main safety valve output branch; 53. Wing safety valve output branch. Detailed Implementation

[0041] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0042] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] This invention provides a single-well control module for offshore platforms with remote production recovery capabilities, which is applied in a wellhead safety control system. Its core is to achieve automated control of the status monitoring, command issuance, and production recovery process of single-well production equipment through remote communication technologies (such as 4G / 5G, satellite, industrial Ethernet, etc.).

[0045] like Figure 1 As shown, this single-well control module includes an emergency shut-off level 1 pilot branch 1, an emergency shut-off level 2 / 3 input branch 2, a downhole safety valve supply branch 3, a main safety valve supply branch 4, a wing safety valve supply branch 5, a third pilot main supply branch 6, a first solenoid valve 7, and a second solenoid valve 8.

[0046] The output of the emergency shut-off level 1 pilot branch 1 is connected to the first pilot oil supply main line 10 via the main shut-off hand pull valve 9. The output of the first pilot oil supply main line 10 is connected to the first hydraulic control three-way valve group 11. The first hydraulic control three-way valve group 11 is connected to the downhole safety valve oil supply branch 3.

[0047] The emergency shut-off 2 / 3 level input branch 2 is connected to the inflow section of the first pilot oil supply main line 10. The output end of the emergency shut-off 2 / 3 level input branch 2 is connected to the second pilot oil supply main line 13 via the second-level shut-off hand-operated valve 12. The output end of the second pilot oil supply main line 13 is connected to the second hydraulic control three-way valve group 14. The second hydraulic control three-way valve group 14 is connected to the main safety valve oil supply branch 4.

[0048] The first solenoid valve 7 is connected to the inflow section of the second pilot oil supply main line 13, and the first solenoid valve 7 is connected to the pilot pressure return oil branch line 16 via the first-stage solenoid valve return oil branch line 15.

[0049] The input end of the third pilot oil supply main line 6 is connected to the inflow section of the second pilot oil supply main line 13 via the three-stage shut-off hand valve 17, and is located downstream of the first solenoid valve 7. The output end of the third pilot oil supply main line 6 is connected to the third hydraulic control three-way valve group 18, and the third hydraulic control three-way valve group 18 is connected to the wing safety valve oil supply branch line 5.

[0050] The second solenoid valve 8 is connected to the inflow section of the third pilot oil supply main line 6, and the second solenoid valve 8 is connected to the pilot pressure return oil branch line 16 via the secondary solenoid valve return oil branch line 19.

[0051] The wellhead safety control system, via emergency shutdown of the first-stage pilot branch 1, the first pilot oil supply main line 10, and the first hydraulically controlled three-way valve group 11, controls the opening of the downhole safety valve oil supply branch 3 to activate the downhole safety valve actuator. Simultaneously, the wellhead safety control system, via emergency shutdown of the second / third-stage input branch 2, the second pilot oil supply main line 13, and the second hydraulically controlled three-way valve group 14, controls the opening of the main safety valve oil supply branch 4 to activate the main safety valve actuator. The wellhead safety control system, via the third pilot oil supply main line 6 and the third hydraulically controlled three-way valve group 18, controls the opening of the wing safety valve oil supply branch 5 to activate the wing safety valve actuator. Thus, the downhole safety valve, main safety valve, and wing safety valve are opened sequentially to open the wellhead tree and facilitate the transfer of oil or natural gas. When well shut-in is required... First, the second solenoid valve 8 can be closed, allowing hydraulic oil from the third pilot supply main line 6 to flow into the system's oil tank via the pilot pressure return branch line 16. This depressurizes the third hydraulically controlled three-way valve group, causing the actuator of the wing safety valve to lose hydraulic control pressure, thus closing the wing safety valve. Then, the first solenoid valve 7 can be closed, allowing hydraulic oil from the second pilot supply main line 13 to flow into the system's oil tank via the pilot pressure return branch line 16. This depressurizes the second hydraulically controlled three-way valve group, causing the actuator of the main safety valve to lose hydraulic control pressure, thus closing the main safety valve. In this way, the wellhead's production tree can be closed. When it is necessary to remotely open the wellhead's production tree, the first solenoid valve 7 and the second solenoid valve 8 can be opened sequentially, thus opening the main safety valve and the wing safety valve, thereby opening the wellhead's production tree.

[0052] Therefore, this single-well control module can remotely shut down and open the wellhead production tree, improve production continuity, reduce unplanned downtime of the production tree, eliminate the need for manual on-site operations, and thus reduce the risk of manual on-site operations during extreme weather.

[0053] It should be noted that when remotely controlling this single-well control module to close or open the wellhead production tree, the lever of the main shut-off manual valve 9 remains open. Hydraulic oil in the system tank flows into the first hydraulically controlled three-way valve group 11 via the emergency shut-off stage 1 pilot branch 1 and the first pilot oil supply main line 10, ensuring that the downhole safety valve supply branch 3 is always open. The downhole safety valve actuator always has pilot pressure, and the downhole safety valve remains open. In the production pipeline of the wellhead production tree, downhole... Safety valves, main safety valves, and wing safety valves are connected in series on the production pipeline. If the main safety valve and wing safety valves are remotely closed, the entire production pipeline of the wellhead tree is also closed. After the first solenoid valve 7 and the second solenoid valve 8 are opened in sequence, the pilot pressure of the second hydraulic control three-way valve group 14 and the third hydraulic control three-way valve group 18 is restored, so that the oil supply branch 4 of the main safety valve and the oil supply branch 5 of the wing safety valve are connected, and the main safety valve and the wing safety valve can be opened, thereby opening the production pipeline of the wellhead tree.

[0054] The inflow section of the first pilot oil supply main line 10 is connected to the pilot pressure return oil branch 16 via a relay valve 20. The emergency shut-off 2 / 3 level input branch 2 is connected to the relay valve 20. The relay valve 20 is configured to switch the connection state between the first pilot oil supply main line 10 and the pilot pressure return oil branch 16 in response to the pilot pressure signal of the emergency shut-off 2 / 3 level input branch 2, so as to realize the hydraulic amplification and logic isolation of the downhole safety valve shut-off action, and improve the system response speed and shut-off reliability.

[0055] When relay valve 20 receives the pilot pressure signal from the emergency shut-off 2 / 3 level input branch 2, it closes the passage to the pilot pressure return oil branch 16. At this time, the first pilot oil supply main line 10 remains open, the system builds pressure normally, and the downhole safety valve is in the open state.

[0056] When the emergency shutdown is triggered, the input branch 2 of the emergency shutdown 2 / 3 loses pressure (relieves pressure). The relay valve 20 switches positions under the action of spring force or differential pressure, connecting the first pilot oil supply main line 10 to the pilot pressure return oil branch 16. The pilot oil line pressure of the downhole safety valve is released instantly, driving the downhole safety valve to close in an emergency.

[0057] The relay valve 20 is a purely liquid- or pneumatically controlled mechanical valve with no electrical components, making it safer and longer-lasting in flammable and explosive wellhead environments.

[0058] The return oil end of the main shut-off hand valve 9 is connected to the pilot pressure return oil branch 16 via the first-stage pilot return oil branch 21. When the lever of the main shut-off hand valve 9 is pressed down, the first-stage pilot branch 1 of the emergency shut-off can be connected to the first-stage pilot return oil branch 21 and the pilot pressure return oil branch 16 in sequence, thereby realizing the depressurization of the first pilot oil supply main line 10, causing the first hydraulic control three-way valve group 11 to lose pilot pressure, the downhole safety valve oil supply branch 3 to close, the downhole safety valve output branch 51 to be depressurized through the downhole safety valve return oil branch 24, the actuator of the downhole safety valve to lose hydraulic control pressure, and the downhole safety valve to close.

[0059] The return oil end of the secondary shut-off hand valve 12 is connected to the pilot pressure return oil branch 16 via the secondary pilot return oil branch 22. When the lever of the secondary shut-off hand valve 12 is pressed down, the emergency shut-off 2 / 3 stage input branch 2 can be connected to the secondary pilot return oil branch 22 and the pilot pressure return oil branch 16 in sequence, thereby realizing the depressurization of the second pilot oil supply main line 13, causing the second hydraulic control three-way valve group 14 to lose pilot pressure, the main safety valve oil supply branch 4 to close, the main safety valve output branch 52 to be depressurized through the main safety valve return oil branch 25, the actuator of the main safety valve to lose hydraulic control pressure, and the main safety valve to close.

[0060] The return oil end of the three-stage shut-off hand valve 17 is connected to the pilot pressure return oil branch 16 via the three-stage pilot return oil branch 23. When the lever of the three-stage shut-off hand valve 17 is pressed down, the third pilot oil supply main line 6 can be connected to the three-stage pilot return oil branch 23 and the pilot pressure return oil branch 16 in sequence, thereby realizing the depressurization of the third pilot oil supply main line 6, causing the third hydraulic control three-way valve group 18 to lose pilot pressure, the wing safety valve oil supply branch 5 to close, the wing safety valve output branch 53 to be depressurized through the wing safety valve return oil branch 26, the actuator of the wing safety valve to lose hydraulic control pressure, and the wing safety valve to close.

[0061] The return end of the first hydraulic control three-way valve group 11 is connected to the return oil branch 24 of the downhole safety valve, which can drain excess pilot hydraulic oil from the pipeline.

[0062] The return end of the second hydraulic three-way valve group 14 is connected to the return branch 25 of the main safety valve, which can drain excess pilot hydraulic oil from the pipeline.

[0063] The return end of the third hydraulic control three-way valve group 18 is connected to the return oil branch 26 of the wing safety valve, which can drain excess pilot hydraulic oil from the pipeline.

[0064] like Figures 2-4As shown, the first hydraulically controlled three-way valve group 11 has a first three-way valve 27, a first check valve 28, and a first relief valve 29. The pilot end of the first three-way valve 27 is connected to the output end of the first pilot oil supply main line 10. The first three-way valve 27 and the first check valve 28 are both connected to the downhole safety valve oil supply branch 3. The two ends of the first relief valve 29 are respectively connected to the downhole safety valve oil supply branch 3 and the downhole safety valve return oil branch 24. The return oil end of the first three-way valve 27 is connected to the downhole safety valve return oil branch 24.

[0065] By integrating the three valve components—the first three-way valve 27, the first one-way valve 28, and the first overflow valve 29—into a valve group that can completely replace the functions of these three valves, the pipeline connection length between the first pilot oil supply main line 10, the downhole safety valve oil supply branch line 3, and the downhole safety valve oil return branch line 24 can be effectively reduced, thereby reducing the number of bends and the number of leakage points.

[0066] The second hydraulic three-way valve assembly 14 includes a second three-way valve 30, a second check valve 31, and a second relief valve 32. The pilot end of the second three-way valve 30 is connected to the second pilot oil supply main line 13. Both the second three-way valve 30 and the second check valve 31 are connected to the main safety valve oil supply branch line 4. The two ends of the second relief valve 32 are respectively connected to the main safety valve oil supply branch line 4 and the main safety valve return oil branch line 25. The return oil end of the second three-way valve 30 is connected to the main safety valve return oil branch line 25.

[0067] Similarly, by integrating the three valve components—the second three-way valve 30, the second one-way valve 31, and the second relief valve 32—into a valve group that can completely replace the functions of these three valves, the pipeline connection length between the second pilot oil supply main line 13, the main safety valve oil supply branch line 4, and the main safety valve return oil branch line 25 can be effectively reduced, thereby reducing the number of bends and the number of leakage points.

[0068] The third hydraulic three-way valve group 18 has a third three-way valve 33, a third check valve 34 and a third relief valve 35. The pilot end of the third three-way valve 33 is connected to the third pilot oil supply main line 6. The third three-way valve 33 and the third check valve 34 are both connected to the wing safety valve oil supply branch line 5. The third relief valve 35 is connected to the wing safety valve return oil branch line 26. The return oil end of the third three-way valve 33 is connected to the wing safety valve return oil branch line 26.

[0069] By integrating the three valve components—the third three-way valve 33, the third one-way valve 34, and the third relief valve 35—into a valve group that can completely replace the functions of these three valves, the pipeline connection length between the third pilot oil supply main line 6, the wing safety valve oil supply branch line 5, and the wing safety valve return oil branch line 26 can be effectively reduced, thereby reducing the number of bends and the number of leakage points.

[0070] In some embodiments, the first relief valve 29 / second relief valve 32 / third relief valve 35 includes a proportional unloading valve, which is configured to proportionally adjust the pilot control pressure of the hydraulic three-way valve assembly in response to an external electrical control signal, so as to realize stepless setting and smooth unloading of system pressure, effectively suppress hydraulic shock, reduce system energy consumption, and integrate pressure limiting protection function.

[0071] A first one-way throttle valve 36 and a first indicator 37 located downstream of the first one-way throttle valve 36 are provided on the first pilot oil supply main line 10.

[0072] The first one-way throttle valve 36 is used to control the pilot pressure release time on the first pilot oil supply main line 10, and generates throttle damping on the shut-off return oil path of the downhole safety valve, so that the first hydraulic control three-way valve group 11 is slowly reset, so as to control the shut-off time within a predetermined range, thereby realizing the control of the shut-off time of the downhole safety valve oil supply branch 3, and thus realizing the downhole safety valve delayed shut-off logic control function.

[0073] The first indicator 37 is used to display the color of light when providing pilot pressure to the first pilot fuel supply main 10 and when releasing the pilot pressure on the first pilot fuel supply main 10. For example, when providing pilot pressure to the first pilot fuel supply main 10, the first indicator 37 will display a green light, and when releasing the pilot pressure on the first pilot fuel supply main 10, the first indicator 37 will display a red light.

[0074] A second one-way throttle valve 38 and a second indicator 39 located downstream of the second one-way throttle valve 38 are provided on the second pilot oil supply main line 13.

[0075] The second one-way throttle valve 38 is used to control the pilot pressure release time on the second pilot oil supply main line 13, and generates throttling damping on the shut-off return oil path of the main safety valve, so that the second hydraulic three-way valve group 14 is slowly reset, so as to control the shut-off time within a predetermined range, thereby realizing the control of the shut-off time of the main safety valve oil supply branch 4, and thus realizing the logic control function of delayed shut-off of the main safety valve.

[0076] The second indicator 39 is used to display the color of light when providing pilot pressure to the second pilot fuel supply main 13 and when releasing the pilot pressure on the second pilot fuel supply main 13. For example, when providing pilot pressure to the second pilot fuel supply main 13, the second indicator 39 will display a green light, and when releasing the pilot pressure on the second pilot fuel supply main 13, the second indicator 39 will display a red light.

[0077] A third indicator 40 is installed on the third pilot oil supply main line 6. The effect of the third indicator 40 is the same as that of the first / second indicator 39 above, so it will not be described again here.

[0078] The inflow section of the first pilot oil supply main line 10 is connected to the pilot branch line 41 of the main shut-off manual valve, and the pilot branch line 41 of the main shut-off manual valve is connected to the pilot end of the main shut-off manual valve 9.

[0079] Emergency shutdown level 1 pilot branch 1 is connected to the emergency shutdown level 1 input port of the main system. When the lever of the main shutdown hand valve 9 is pulled up, emergency shutdown level 1 pilot branch 1 is connected to the first pilot oil supply main line 10. The first pilot oil supply main line 10 has pilot pressure, which is input to the pilot end of the main shutdown hand valve 9 through the main shutdown hand valve pilot branch 41, keeping the main shutdown hand valve 9 in the open state; when the pilot pressure drops to insufficient to support... When the lever of the main shut-off manual valve 9 is pulled, the lever of the main shut-off manual valve 9 will spring back, causing the main shut-off manual valve 9 to close. The emergency shut-off first-stage pilot branch 1 is disconnected from the first pilot oil supply main line 10, the first hydraulic control three-way valve group 11 loses pilot pressure, the downhole safety valve oil supply branch 3 closes, the downhole safety valve output branch 51 is depressurized through the downhole safety valve return oil branch 24, the actuator of the downhole safety valve loses hydraulic control pressure, and the downhole safety valve closes.

[0080] A first pressure gauge 42 and a first pressure transmitter 43 are connected sequentially on the output branch 51 of the downhole safety valve and on the downstream side of the first hydraulic control three-way valve group 11.

[0081] A second pressure gauge 44 and a second pressure transmitter 45 are connected sequentially on the main safety valve output branch 52 and downstream of the second hydraulic three-way valve group 14.

[0082] A third pressure gauge 46 and a third pressure transmitter 47 are connected sequentially on the output branch 53 of the wing safety valve and downstream of the third hydraulic three-way valve group 18.

[0083] Based on the well opening sequence, the downhole safety valve is opened first, followed by the main safety valve, and finally the wing safety valve. The relevant actions of this single-well control module are as follows:

[0084] First, the lever of the main shut-off manual valve 9 is pulled up, triggering and transmitting the feedback signal of the main shut-off manual valve 9's opening status. The emergency shut-off first-stage pilot branch 1 (pilot pressure ESD1) is connected, and the pilot pressure of the emergency shut-off first-stage pilot branch 1 acts on the pilot port of the main shut-off manual valve 9, the first hydraulic control three-way valve group 11, and the relay valve 20. The first indicator 37 turns green, the downhole safety valve supply branch 3 is connected, and the hydraulic control pressure of the downhole safety valve output branch 51 is displayed by the first pressure gauge 42 and transmitted remotely by the first pressure transmitter 43. Then, the hydraulic control pressure of the downhole safety valve output branch 51 is transmitted to the hydraulic actuator of the downhole safety valve through the pipeline. The actuator of the downhole safety valve is pushed open, and oil or natural gas can be released from the formation and transported from underground to the surface through the oil pipe until the main safety valve.

[0085] The relay valve 20 connects the emergency shut-off 2 / 3 stage input branch 2 (pilot pressure ESD2), causing the pilot pressure to flow to the secondary shut-off manual valve 12. Pulling up the lever of the secondary shut-off manual valve 12 triggers and transmits the feedback signal of the opening status of the secondary shut-off manual valve 12. The pilot pressure then flows to the first solenoid valve 7, which can be remotely energized and opened. The second hydraulic control three-way valve group 14 is turned on, the second indicator 39 turns green, the main safety valve output branch 52 is turned on, the hydraulic control pressure of the main safety valve output branch 52 is displayed by the second pressure gauge 44 and transmitted remotely by the second pressure transmitter 45. Then, the hydraulic control pressure of the main safety valve output branch 52 is delivered to the hydraulic actuator of the main safety valve through the pipeline. The actuator of the main safety valve is pushed open, and oil or natural gas is released through the main safety valve and continues to be delivered to the wing valve through the oil pipe.

[0086] After the first solenoid valve 7 opens, the pilot pressure on the emergency shut-off 2 / 3 stage input branch 2 flows to the pilot port of the 3-stage shut-off manual valve 17 and the third hydraulically controlled three-way valve group 18. Pulling up the 3-stage shut-off manual valve 17 triggers and transmits the open status feedback signal, causing the pilot pressure to flow to the second solenoid valve 8. The second solenoid valve 8 can be remotely energized and opened, allowing the pilot pressure to flow to the pilot port of the third hydraulically controlled three-way valve group 18. The third indicator 4... When the indicator turns green, the third hydraulic three-way valve group 18 is activated, the wing safety valve output branch 53 is activated, the hydraulic control pressure on the wing safety valve output branch 53 is displayed by the third pressure gauge 46 and transmitted remotely by the third pressure transmitter 47. The hydraulic control pressure on the wing safety valve output branch 53 is transmitted to the hydraulic actuator of the wing safety valve through the pipeline. The actuator of the wing safety valve is pushed open, and oil or natural gas is released through the wing safety valve and continues to be transported downstream through the oil pipeline.

[0087] Based on the well shut-in sequence, the wing safety valve is closed first, then the main safety valve is closed, and finally the downhole safety valve is closed. The relevant actions of this single-well control module are as follows:

[0088] First, pressing the three-stage shut-off hand valve 17 releases the pilot pressure of the third pilot oil supply main line 6. The pilot pressure flows back through the three-stage shut-off hand valve 17, releasing the pilot pressure of the third hydraulic control three-way valve group 18. The third hydraulic control three-way valve group 18 is reset, and the hydraulic control pressure of the wing safety valve oil supply branch 5 is released to zero through the third three-way valve 33 in the third hydraulic control three-way valve group 18. The pressure in the hydraulic actuator of the wing safety valve flows back into the equipment through the pipeline and is released back to the oil tank. The actuator of the wing safety valve is closed, and the delivery of oil or natural gas is closed through the wing safety valve.

[0089] Then, press the secondary shut-off hand valve 12. The pilot pressure on the second pilot oil supply main line 13 is released. The pilot pressure flows back through the secondary shut-off hand valve 12. The pilot pressure of the second hydraulic control three-way valve group 14 is released for a time controlled by the second one-way throttle valve 38. The second hydraulic control three-way valve group 14 is slowly reset. The hydraulic control pressure on the main safety valve output branch 52 is released to zero through the second three-way valve 30. The pressure in the hydraulic actuator of the main safety valve flows back into the equipment through the pipeline and is released back to the oil tank. The actuator of the main safety valve is closed. The delivery of oil or natural gas is closed through the main safety valve.

[0090] Finally, pressing the main shut-off hand valve 9 releases the pilot pressure of the first pilot oil supply main line 10. The pilot pressure flows back through the main shut-off hand valve 9. The pilot pressure of the first hydraulic control three-way valve group 11 is released at a time controlled by the first one-way throttle valve 36. The first hydraulic control three-way valve group 11 is slowly reset. The hydraulic control pressure on the output branch 51 of the downhole safety valve is released to zero through the first three-way valve 27. The pressure in the hydraulic actuator of the downhole safety valve flows back into the equipment through the pipeline and is released back into the oil tank. The actuator of the downhole safety valve is closed, and the delivery of oil or natural gas is shut off through the downhole safety valve.

[0091] The following are the relevant actions for remotely controlling well shut-in using this single-well control module:

[0092] When the downhole safety valve, main safety valve, and wing safety valve are all in the normal well opening production stage, upon receiving the instruction to remotely close the wing safety valve, the second solenoid valve 8 is first de-energized and closed via the remote central control system. At this time, the three-stage shut-off manual valve 17 is in the open state, the pilot pressure on the third pilot oil supply main line 6 flows back through the second solenoid valve 8, the third hydraulic control three-way valve group 18 is reset, the hydraulic control pressure of the wing safety valve oil supply branch 5 is released to zero, the actuator of the wing safety valve is closed, and the wing safety valve is closed. Upon receiving the instruction to remotely close the main safety valve, the first solenoid valve 7 is de-energized and closed via the remote central control system. At this time, the second-stage shut-off manual valve 12 is in the open state, the pilot pressure of the second pilot oil supply main line 13 flows back through the first solenoid valve 7, the second hydraulic control three-way valve group 14 is slowly reset, the hydraulic control pressure of the main safety valve output branch 52 is released to zero, the actuator of the main safety valve is closed, and the main safety valve is closed.

[0093] The following are the relevant actions for remotely controlling well opening using this single-well control module:

[0094] Upon receiving a remote command to open the main safety valve, the remote control system energizes and opens the first solenoid valve 7, connecting the second pilot oil supply main line 13 to the pilot pressure. The pilot pressure flows to the pilot port of the second hydraulic three-way valve group 14, activating the second hydraulic three-way valve group 14. The main safety valve output branch 52 is then activated, and its hydraulic pressure is transmitted through the pipeline to the hydraulic actuator of the main safety valve. The actuator of the main safety valve is pushed open, and the main safety valve is opened. Upon receiving a remote command to open the wing safety valve, the remote control system energizes and opens the second solenoid valve 8, connecting the third pilot oil supply main line 6 to the pilot pressure. The pilot pressure flows to the pilot port of the third hydraulic three-way valve group 18, activating the third hydraulic three-way valve group 18. The wing safety valve output branch 53 is then activated, and its hydraulic pressure is transmitted through the pipeline to the hydraulic actuator of the wing safety valve. The actuator of the wing safety valve is pushed open, and the wing safety valve is opened.

[0095] The main shut-off manual valve 9 is equipped with a first valve position sensing switch 48, which is connected to a first shut-off indicator light. The first valve position sensing switch 48 is used to sense whether the lever of the main shut-off manual valve 9 is in the closed state. If the lever of the main shut-off manual valve 9 is pressed down to shut it off, the first valve position sensing switch 48 can sense this and cause the first shut-off indicator light to be connected to the circuit and lit up.

[0096] A second valve position sensor switch 49 is provided on the secondary shut-off manual valve 12. The second valve position sensor switch 49 is connected to the second shut-off indicator light. The second valve position sensor switch 49 is used to sense whether the lever of the secondary shut-off manual valve 12 is in the closed state. If the lever of the secondary shut-off manual valve 12 is pressed down to shut it off, the second valve position sensor switch 49 can sense this and cause the second shut-off indicator light to be connected to the circuit and lit up.

[0097] The three-stage shut-off manual pull valve 17 is equipped with a third valve position sensor switch 50, which is connected to a third shut-off indicator light. The third valve position sensor switch 50 is used to sense whether the lever of the three-stage shut-off manual pull valve 17 is in the closed state. If the lever of the three-stage shut-off manual pull valve 17 is pressed down to shut it off, the third valve position sensor switch 50 can sense this and cause the third shut-off indicator light to be connected to the circuit and lit up.

[0098] By setting valve position sensing switches on the main shut-off manual valve 9, the secondary shut-off manual valve 12, and the tertiary shut-off manual valve 17, the physical position status of the manual operating mechanism is converted into an electrical signal and connected to the control system. This enables the monitoring of the status of the manual shut-off action, the interlocking of logic, and the traceability of events. It solves the problem of information silos in traditional manual valves in automation systems and improves the digital level of wellhead safety management.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A single-well control module for offshore platforms with remote production recovery capability, applied in a wellhead safety control system, characterized in that, It includes an emergency shut-off level 1 pilot branch, an emergency shut-off level 2 / 3 input branch, a downhole safety valve supply branch, a main safety valve supply branch, a wing safety valve supply branch, a third pilot main supply branch, a first solenoid valve, and a second solenoid valve. The output end of the emergency shut-off level 1 pilot branch is connected to the first pilot oil supply main line via the main shut-off hand pull valve. The output end of the first pilot oil supply main line is connected to the first hydraulic control three-way valve group. The first hydraulic control three-way valve group is connected to the downhole safety valve oil supply branch. The emergency shut-off 2 / 3 level input branch is connected to the inflow section of the first pilot oil supply main line. The output end of the emergency shut-off 2 / 3 level input branch is connected to the second pilot oil supply main line via the second-level shut-off hand pull valve. The output end of the second pilot oil supply main line is connected to the second hydraulic control three-way valve group. The second hydraulic control three-way valve group is connected to the main safety valve oil supply branch. The first solenoid valve is connected to the inflow section of the second pilot oil supply main line, and the first solenoid valve is connected to the pilot pressure return oil branch through the first-stage solenoid valve return oil branch. The input end of the third pilot oil supply main circuit is connected to the inflow section of the second pilot oil supply main circuit via a three-stage shut-off hand-operated valve and is located downstream of the first solenoid valve. The output end of the third pilot oil supply main circuit is connected to the third hydraulic control three-way valve group, and the third hydraulic control three-way valve group is connected to the oil supply branch of the wing safety valve. The second solenoid valve is connected to the inflow section of the third pilot oil supply main line, and the second solenoid valve is connected to the pilot pressure return oil branch through the secondary solenoid valve return oil branch.

2. The single-well control module according to claim 1, characterized in that, The inflow section of the first pilot oil supply main line is connected to the pilot pressure return oil branch via a relay valve, and the emergency shut-off 2 / 3 level input branch is connected to the relay valve.

3. The single-well control module according to claim 1, characterized in that, The return oil end of the main shut-off manual valve is connected to the pilot pressure return oil branch via a primary pilot return oil branch; The return oil end of the secondary shut-off hand valve is connected to the pilot pressure return oil branch via the secondary pilot return oil branch; The return oil end of the three-stage shut-off hand valve is connected to the pilot pressure return oil branch via the three-stage pilot return oil branch.

4. The single-well control module according to any one of claims 1-3, characterized in that, The return oil end of the first hydraulically controlled three-way valve assembly is connected to the return oil branch of the downhole safety valve. The return end of the second hydraulic three-way valve assembly is connected to the return branch of the main safety valve; The return oil end of the third hydraulic control three-way valve group is connected to the return oil branch of the wing safety valve.

5. The single-well control module according to claim 4, characterized in that, The first hydraulically controlled three-way valve assembly includes a first three-way valve, a first check valve, and a first relief valve. The pilot end of the first three-way valve is connected to the output end of the first pilot oil supply main line. Both the first three-way valve and the first check valve are connected to the oil supply branch of the downhole safety valve. The two ends of the first relief valve are respectively connected to the oil supply branch of the downhole safety valve and the oil return branch of the downhole safety valve. The oil return end of the first three-way valve is connected to the oil return branch of the downhole safety valve. The second hydraulic three-way valve assembly includes a second three-way valve, a second check valve, and a second relief valve. The pilot end of the second three-way valve is connected to the second pilot oil supply main line. Both the second three-way valve and the second check valve are connected to the oil supply branch of the main safety valve. The two ends of the second relief valve are respectively connected to the oil supply branch of the main safety valve and the oil return branch of the main safety valve. The oil return end of the second three-way valve is connected to the oil return branch of the main safety valve. The third hydraulically controlled three-way valve group includes a third three-way valve, a third check valve, and a third relief valve. The pilot end of the third three-way valve is connected to the third pilot oil supply main line. Both the third three-way valve and the third check valve are connected to the oil supply branch of the wing safety valve. The third relief valve is connected to the oil return branch of the wing safety valve. The oil return end of the third three-way valve is connected to the oil return branch of the wing safety valve.

6. The single-well control module according to claim 5, characterized in that, The first relief valve, the second relief valve, and the third relief valve include proportional unloading valves.

7. The single-well control module according to claim 1, characterized in that, A first one-way throttle valve and a first indicator located downstream of the first one-way throttle valve are provided on the first pilot oil supply main line; A second one-way throttle valve and a second indicator located downstream of the second one-way throttle valve are provided on the second pilot oil supply main line; A third indicator is installed on the third pilot oil supply line.

8. The single-well control module according to claim 1, characterized in that, The inflow section of the first pilot oil supply main line is connected to the pilot branch of the main shut-off manual valve, and the pilot branch of the main shut-off manual valve is connected to the pilot end of the main shut-off manual valve.

9. The single-well control module according to claim 1, characterized in that, A first pressure gauge and a first pressure transmitter are connected sequentially on the output branch of the downhole safety valve and on the downstream side of the first hydraulically controlled three-way valve group. A second pressure gauge and a second pressure transmitter are connected sequentially on the output branch of the main safety valve and downstream of the second hydraulic three-way valve group. A third pressure gauge and a third pressure transmitter are connected sequentially on the output branch of the wing safety valve and downstream of the third hydraulic three-way valve group.

10. The single-well control module according to claim 1, characterized in that, The main shut-off manual valve is equipped with a first valve position sensing switch, which is connected to a first shut-off indicator light. The first valve position sensing switch is used to sense whether the lever of the main shut-off manual valve is in the shut-off state. The secondary shut-off manual valve is equipped with a second valve position sensor switch, which is connected to a second shut-off indicator light. The second valve position sensor switch is used to sense whether the lever of the secondary shut-off manual valve is in the shut-off state. The three-stage shut-off manual pull valve is equipped with a third valve position sensor switch, which is connected to a third shut-off indicator light. The third valve position sensor switch is used to sense whether the lever of the three-stage shut-off manual pull valve is in the shut-off state.

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