A single well control module integrating multiple valve groups

Abstract

The application discloses a single-well control module integrated with multiple valve groups, which is applied to a wellhead safety control system of an oil and gas well. The single-well control module has 1 / 2 level control of an emergency shutdown system, 3 level control of the emergency shutdown system, ground wing valve B shutdown control and ground wing valve A shutdown control, can realize four-valve control of a downhole safety valve, a ground main valve, the ground wing valve B and the ground wing valve A, and realizes opening / closing well sequence requirements and remote well shutdown operation through a distributed control system. The single-well control module uses multiple highly integrated valve groups for pipeline connection, can greatly reduce the length of the pipeline and the number of joints, effectively reduces the number of leakage points, enables maintenance personnel to quickly locate abnormal positions, improves the sealing property, reliability and maintenance convenience of system pipeline connection, and realizes integration and standardization of the single-well control module.

Description

Technical Field

[0001] This invention relates to the field of wellhead safety control technology, and in particular to a single-well control module integrating multiple valve groups. Background Technology

[0002] In the field of oil and gas extraction, wellhead safety control systems are key equipment to ensure the safe operation of the oil and gas production process. Wellhead safety control systems include downhole safety valves, surface main valves, and surface wing valves. These valves are opened and closed through hydraulic control circuits to deal with abnormal wellhead pressure, leakage, fire, or other safety hazards.

[0003] As global oil and gas exploration and development extends to deep-sea, high-temperature and high-pressure environments and other unconventional resource areas, single-well control, as a core link in ensuring the safety of oil and gas production, will also face multiple challenges in terms of precision control, environmental adaptation, and cost optimization. The industry is also accelerating its transformation towards electrification and digitalization. The demand for intelligent mining is driving the upgrading of traditional control modules, and integration has become a key path to solve the reliability of systems under complex working conditions.

[0004] However, traditional wellhead safety control systems use independent hydraulic components connected to instrument lines, meaning that each control valve (such as hydraulic three-way valves, relief valves, check valves, etc.) is connected through instrument lines. This results in the following problems with traditional wellhead safety control systems:

[0005] First, the dispersed layout of valves leads to low system integration. The independent installation mode of multiple valves not only occupies a large area and has complex pipeline connections, but also increases the risk and cost of leakage, especially in space-constrained scenarios such as offshore platforms where adaptability is poor.

[0006] Second, the maintenance of system modules is inconvenient. During the production process, when traditional modules have problems such as interface leakage or internal valve abnormalities, it is difficult for maintenance personnel to quickly locate the abnormality. Even if the abnormality is found, it is difficult to repair in the small module with many pipelines.

[0007] Therefore, developing integrated, standardized, and highly reliable single-well control modules has become an urgent need to address industry pain points and ensure the safe and efficient extraction of energy. Summary of the Invention

[0008] This invention provides a single-well control module with integrated multi-valve groups. This single-well control module uses multiple highly integrated valve groups for pipeline connection, which can significantly reduce the length of pipelines and the number of joints, effectively reduce the number of leakage points, improve the sealing performance, reliability and maintenance convenience of the system pipeline connection, and realize the integration and standardization of the single-well control module.

[0009] This invention provides a single-well control module integrating multiple valve groups, applied in the wellhead safety control system of oil and gas wells, comprising:

[0010] The output end of the 1 / 2 level pilot branch of the emergency shutdown system is connected to the downhole safety valve pilot control main line via the module main shutdown hand pull valve. The output end of the downhole safety valve pilot control main line is connected to the pilot end of the downhole safety valve hydraulic control three-way valve group. The downhole safety valve hydraulic control three-way valve group is connected to the downhole safety valve hydraulic control main line and the downhole safety valve return oil branch line respectively.

[0011] The emergency shutdown system has a level 3 pilot branch, which is connected to the downhole safety valve pilot control main line via a surface safety valve pilot control relay valve. The output end of the emergency shutdown system has a level 3 pilot branch connected to the surface main valve pilot control main line via a surface safety valve shut-off manual valve. The output end of the surface main valve pilot control main line is connected to the pilot end of the surface main valve hydraulic control three-way valve group. The surface main valve hydraulic control three-way valve group is connected to the surface main valve hydraulic control main line and the surface main valve return oil branch, respectively.

[0012] The input branch of the ground wing valve B shut-off manual pull valve is connected to the ground safety valve shut-off manual pull valve. The output of the input branch of the ground wing valve B shut-off manual pull valve is connected to the pilot control main line of the ground wing valve B via the ground wing valve B shut-off manual pull valve. The output of the pilot control main line of the ground wing valve B is connected to the pilot end of the hydraulic control three-way valve group of the ground wing valve B. The hydraulic control three-way valve group of the ground wing valve B is connected to the hydraulic control main line of the ground wing valve B and the return oil branch of the ground wing valve B respectively.

[0013] Additionally, the input branch of the ground wing valve A shut-off manual pull valve is connected to the ground safety valve shut-off manual pull valve at its input end. The output end of the input branch of the ground wing valve A shut-off manual pull valve is connected to the pilot control main line of the ground wing valve A via the ground wing valve A shut-off manual pull valve. The output end of the pilot control main line of the ground wing valve A is connected to the pilot end of the hydraulic control three-way valve group of the ground wing valve A. The hydraulic control three-way valve group of the ground wing valve A is connected to the hydraulic control main line of the ground wing valve A and the return oil branch of the ground wing valve A, respectively.

[0014] In some embodiments, the downhole safety valve hydraulic control 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 downhole safety valve pilot control main circuit. Both the first three-way valve and the first check valve are connected to the downhole safety valve hydraulic control main circuit. The two ends of the first relief valve are respectively connected to the downhole safety valve hydraulic control main circuit and the downhole safety valve return oil branch circuit. The return oil end of the first three-way valve is connected to the downhole safety valve return oil branch circuit.

[0015] The ground main valve 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 pilot control main circuit of the ground main valve. Both the second three-way valve and the second check valve are connected to the hydraulic control main circuit of the ground main valve. The two ends of the second relief valve are respectively connected to the hydraulic control main circuit of the ground main valve and the return oil branch of the ground main valve. The return oil end of the second three-way valve is connected to the return oil branch of the ground main valve.

[0016] The ground wing valve B hydraulic control three-way valve group has 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 pilot control main circuit of the ground wing valve B. The third three-way valve and the third check valve are both connected to the hydraulic control main circuit of the ground wing valve B. The third relief valve is connected to the oil return branch of the ground wing valve B. The oil return end of the third three-way valve is connected to the oil return branch of the ground wing valve B.

[0017] The ground wing valve A hydraulic control three-way valve group has a fourth three-way valve, a fourth check valve and a fourth relief valve. The pilot end of the fourth three-way valve is connected to the pilot control main circuit of the ground wing valve A. The fourth three-way valve and the fourth check valve are both connected to the hydraulic control main circuit of the ground wing valve A. The fourth relief valve is connected to the return oil branch of the ground wing valve A. The return oil end of the fourth three-way valve is connected to the return oil branch of the ground wing valve A.

[0018] In some embodiments, the outlet end and the pilot end of the module's main shut-off manual valve are connected through the module's main shut-off manual valve pilot self-locking branch;

[0019] The pilot end of the ground safety valve pilot control relay valve is connected to the outlet end of the module's main shut-off manual valve via the ground relay valve pilot control branch.

[0020] The return oil end of the pilot control relay valve of the ground safety valve is connected to the pilot return oil branch through the return oil branch of the ground relay valve.

[0021] The return oil end of the module's main shut-off manual valve is connected to the pilot return oil branch via the module's main shut-off manual valve return oil branch.

[0022] In some embodiments, the downhole safety valve pilot control main circuit includes a downhole safety valve pilot control branch and a downhole safety valve pilot delay branch. The inflow end of the downhole safety valve pilot control branch is connected to the outlet end of the module's main shut-off manual valve. The outflow end of the downhole safety valve pilot control branch is connected to the downhole safety valve pilot delay branch via a downhole safety valve pilot one-way throttle valve. The outflow end of the downhole safety valve pilot delay branch is connected to the pilot end of the downhole safety valve hydraulic control three-way valve assembly.

[0023] In some embodiments, the outlet end of the ground safety valve pilot control relay valve is connected to the input branch of the ground shut-off manual valve, and the input branch of the ground shut-off manual valve is connected to the pilot control main line of the ground main valve via the ground safety valve shut-off manual valve.

[0024] The outlet end of the ground safety valve shut-off manual valve and the pilot end are connected through the pilot self-locking branch of the ground shut-off manual valve.

[0025] The return oil end of the ground safety valve shut-off manual pull valve is connected to the return oil branch of the ground shut-off manual pull valve, and the outflow end of the return oil branch of the ground shut-off manual pull valve is connected to the pilot return oil branch.

[0026] In some embodiments, the ground main valve pilot control main circuit includes a ground main valve pilot control branch and a ground main valve pilot delay branch. The inflow end of the ground main valve pilot control branch is connected to the outlet end of the ground safety valve shut-off manual valve. The outflow end of the ground main valve pilot control branch is connected to the ground main valve pilot delay branch via a ground main valve pilot one-way throttle valve. The outflow end of the ground main valve pilot delay branch is connected to the pilot end of the ground main valve hydraulic three-way valve assembly.

[0027] In some embodiments, the outlet end of the pilot control relay valve of the ground safety valve is connected to the input branch of the shut-off manual valve of the ground wing valve B, and the input branch of the shut-off manual valve of the ground wing valve B is connected to the pilot control main line of the ground wing valve B via the shut-off manual valve of the ground wing valve B.

[0028] The outlet end and the pilot end of the ground wing valve B shut-off manual pull valve are connected through the pilot self-locking branch of the ground wing valve B shut-off manual pull valve.

[0029] The return oil end of the ground wing valve B shut-off hand pull valve is connected to the return oil branch of the ground wing valve B shut-off hand pull valve, and the outflow end of the return oil branch of the ground wing valve B shut-off hand pull valve is connected to the pilot return oil branch.

[0030] The outflow section of the main pilot control path of the ground wing valve B is also connected to the pilot indicator branch of the ground wing valve B, and the outflow end of the pilot indicator branch of the ground wing valve B is connected to the pilot indicator of the ground wing valve B.

[0031] In some embodiments, the outlet end of the ground safety valve pilot control relay valve is connected to the input branch of the ground wing valve A shut-off manual valve, and the input branch of the ground wing valve A shut-off manual valve is connected to the pilot control main line of the ground wing valve A via the ground wing valve A shut-off manual valve.

[0032] The outlet end and the pilot end of the ground wing valve A shut-off manual pull valve are connected through the pilot self-locking branch of the ground wing valve A shut-off manual pull valve.

[0033] The return oil end of the ground wing valve A shut-off hand pull valve is connected to the return oil branch of the ground wing valve A shut-off hand pull valve, and the outflow end of the return oil branch of the ground wing valve A shut-off hand pull valve is connected to the pilot return oil branch.

[0034] The outflow section of the pilot control main path of the ground wing valve A is also connected to the pilot indicator branch of the ground wing valve A, and the outflow end of the pilot indicator branch of the ground wing valve A is connected to the pilot indicator of the ground wing valve A.

[0035] In some embodiments, the outflow section of the downhole safety valve pilot control main circuit is further connected to a downhole safety valve pilot indicator branch, and the outflow end of the downhole safety valve pilot indicator branch is connected to a downhole safety valve pilot indicator.

[0036] The outflow section of the ground main valve pilot control main line is also connected to the ground main valve pilot indicator branch, and the outflow end of the ground main valve pilot indicator branch is connected to the ground main valve pilot indicator.

[0037] In some embodiments, the outflow section of the downhole safety valve hydraulic control main circuit is connected to the downhole safety valve hydraulic control output pressure gauge via a branch circuit of the downhole safety valve hydraulic control output pressure gauge;

[0038] The outflow section of the hydraulic control main circuit of the ground main valve is connected to the hydraulic control output pressure gauge of the ground main valve via the hydraulic control output pressure gauge branch circuit.

[0039] The outflow section of the hydraulic control main circuit of the ground wing valve B is connected to the hydraulic control output pressure gauge of the ground wing valve B via the hydraulic control output pressure gauge branch circuit.

[0040] The outflow section of the hydraulic control main circuit of the ground wing valve A is connected to the hydraulic control output pressure gauge of the ground wing valve A via the branch circuit of the hydraulic control output pressure gauge of the ground wing valve A.

[0041] As can be seen from the above technical solutions, the present invention has the following advantages:

[0042] The single-well control module of this invention features level 1 / 2 emergency shutdown system control, level 3 emergency shutdown system control, surface wing valve B shutdown control, and surface wing valve A shutdown control. It can achieve four-valve control of the downhole safety valve, surface main valve, surface wing valve B, and surface wing valve A, and realize the well opening / closing sequence requirements and remote well shut-off operation through a distributed control system. Furthermore, this single-well control module uses multiple highly integrated valve groups for pipeline connection, which can significantly reduce the length of pipelines and the number of joints, effectively reduce the number of leakage points, allow maintenance personnel to quickly locate abnormal locations, improve the sealing, reliability, and maintenance convenience of the system pipeline connection, and realize the integration and standardization of the single-well control module. Attached Figure Description

[0043] 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.

[0044] Figure 1 This is a system schematic diagram of a single-well control module integrating multiple valve groups according to an embodiment of this application;

[0045] Figure 2 yes Figure 1 The diagram shows the division of regions A, B, C, and D in the system schematic diagram.

[0046] Figure 3 yes Figure 2 Enlarged view of region A in the middle;

[0047] Figure 4 yes Figure 2 Enlarged view of region B in the middle;

[0048] Figure 5 yes Figure 2 Enlarged view of region C in the middle;

[0049] Figure 6 yes Figure 2 Enlarged view of region D in the middle;

[0050] Figure 7 yes Figure 1 The schematic diagram shown is a schematic of the downhole safety valve hydraulic three-way valve.

[0051] Figure 8 yes Figure 1 The schematic diagram shown is a ground main valve hydraulic three-way valve of the system schematic diagram;

[0052] Figure 9 yes Figure 1 The schematic diagram shown is a schematic of the ground wing valve B hydraulic three-way valve.

[0053] Figure 10 yes Figure 1 The schematic diagram shown is a ground-mounted wing valve A hydraulic three-way valve.

[0054] The meanings of the reference numerals in the attached figures are as follows:

[0055] I1, Emergency Shutdown System Level 1 / 2 Pilot Input; I2, Emergency Shutdown System Level 3 Pilot Input; I3, Surface Wing Valve A Working Pressure Input; I4, Surface Wing Valve B Working Pressure Input; I5, Surface Main Valve Working Pressure Input; I6, Downhole Safety Valve Working Pressure Input;

[0056] T1, Pilot return end; T2, Downhole safety valve return end; T3, Surface main valve return end; T4, Surface wing valve B return end; T5, Surface wing valve A return end;

[0057] O1, Working pressure output terminal of surface wing valve A; O2, Working pressure output terminal of surface wing valve B; O3, Working pressure output terminal of surface main valve; O4, Working pressure output terminal of downhole safety valve;

[0058] L1, Emergency Shutdown System Level 1 / 2 Pilot Branch; L2, Emergency Shutdown System Level 3 Pilot Branch; L3, Module Main Shutdown Manual Valve Pilot Self-Locking Branch; L4, Surface Relay Valve Pilot Control Branch; L5, Downhole Safety Valve Pilot Control Branch; L6, Surface Shutdown Manual Valve Input Branch; L7, Surface Shutdown Manual Valve Pilot Self-Locking Branch; L8, Surface Main Valve Pilot Control Branch; L9, Surface Wing Valve B Shutdown Manual Valve Input Branch; L10, Surface Wing Valve B Pilot Control Branch; L11, Surface... L12, Surface wing valve B shut-off manual valve input branch; L13, Surface wing valve A shut-off manual valve pilot self-locking branch; L14, Surface wing valve A pilot control branch; L15, Surface wing valve A pilot indicator branch; L16, Surface wing valve B pilot indicator branch; L17, Surface main valve pilot delay branch; L18, Surface main valve pilot indicator branch; L19, Downhole safety valve pilot delay branch; L20, Downhole safety valve pilot indicator branch;

[0059] M1, Ground Wing Valve A hydraulic control input branch; M2, Ground Wing Valve A hydraulic control output branch; M3, Ground Wing Valve A hydraulic control output pressure gauge branch; M4, Ground Wing Valve B hydraulic control input branch; M5, Ground Wing Valve B hydraulic control output branch; M6, Ground Wing Valve B hydraulic control output pressure gauge branch; M7, Ground Main Valve hydraulic control input branch; M8, Ground Main Valve hydraulic control output branch; M9, Ground Main Valve hydraulic control output pressure gauge branch; M10, Ground Wing Valve A hydraulic control main branch; M11, Ground Wing Valve B hydraulic control main branch; M12, Ground Main Valve hydraulic control main branch;

[0060] H, downhole safety valve hydraulic control main circuit; H1, downhole safety valve hydraulic control input branch; H2, downhole safety valve hydraulic control output branch; H3, downhole safety valve hydraulic control output pressure gauge branch;

[0061] R1, Pilot return line; R2, Module main shut-off manual valve return line; R3, Surface relay valve return line; R4, Surface shut-off manual valve return line; R5, Surface wing valve B shut-off manual valve return line; R6, Surface wing valve A shut-off manual valve return line; R7, Surface wing valve A return line; R8, Surface wing valve B return line; R9, Surface main valve return line; R10, Downhole safety valve return line;

[0062] BV1.1, Emergency Shutdown System Stage 1 / 2 Pilot Isolation Ball Valve; BV1.2, Emergency Shutdown System Stage 3 Pilot Isolation Ball Valve; BV2.1, Surface Wing Valve A Hydraulic Input Isolation Ball Valve; BV2.2, Surface Wing Valve B Hydraulic Input Isolation Ball Valve; BV2.3, Surface Main Valve Hydraulic Input Isolation Ball Valve; BV3.1, Downhole Safety Valve Hydraulic Input Isolation Ball Valve;

[0063] CV1.1, Pilot return check valve; CV2.1, Downhole safety valve return check valve; CV3.1, Surface main valve return check valve; CV3.2, Surface wing valve B return check valve; CV3.3, Surface wing valve A return check valve; FCV1.1, Surface main valve pilot check throttle valve; FCV1.2, Downhole safety valve pilot check throttle valve;

[0064] IVM1.1, Surface Wing Valve A Hydraulic Control Three-Way Valve Assembly; IVM1.2, Surface Wing Valve B Hydraulic Control Three-Way Valve Assembly; IVM1.3, Surface Main Valve Hydraulic Control Three-Way Valve Assembly; IVM2.1, Downhole Safety Valve Hydraulic Control Three-Way Valve Assembly;

[0065] A1, First three-way valve; A2, First check valve; A3, First relief valve;

[0066] B1, Second three-way valve; B2, Second check valve; B3, Second relief valve;

[0067] C1, Third three-way valve; C2, Third check valve; C3, Third relief valve;

[0068] D1, fourth three-way valve; D2, fourth check valve; D3, fourth relief valve;

[0069] MVB1.1, Ground safety valve shut-off manual pull valve; MVB1.2, Ground wing valve A shut-off manual pull valve; MVB1.3, Ground wing valve B shut-off manual pull valve; MVR1.1, Module main shut-off manual pull valve;

[0070] PG1.1, Hydraulic output pressure gauge for surface wing valve A; PG1.2, Hydraulic output pressure gauge for surface wing valve B; PG1.3, Hydraulic output pressure gauge for surface main valve; PG2.1, Hydraulic output pressure gauge for downhole safety valve; PI1.1, Pilot indicator for surface wing valve A; PI1.2, Pilot indicator for surface wing valve B; PI1.3, Pilot indicator for surface main valve; PI1.4, Pilot indicator for downhole safety valve; PV1.1, Pilot control relay valve for surface safety valve. Detailed Implementation

[0071] 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.

[0072] 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.

[0073] 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.

[0074] The wellhead control panel is divided into a common module and a single-well module. The common module provides hydraulic input and logic control for all single-well modules on the platform, while the single-well module is responsible for the hydraulic input and logic control of the safety valve of one oil and gas well.

[0075] like Figures 1-6 This application proposes a single-well control module integrating multiple valve groups, which is applied in the wellhead safety control system of oil and gas wells. It includes an emergency shut-off system 1 / 2-level pilot branch L1, downhole safety valve hydraulic control main line H, downhole safety valve return oil branch R10, emergency shut-off system 3-level pilot branch L2, surface main valve hydraulic control main line M12, surface main valve return oil branch R9, surface wing valve B shut-off manual pull valve input branch L9, surface wing valve B hydraulic control main line M11, surface wing valve B return oil branch R8, surface wing valve A shut-off manual pull valve input branch L11, surface wing valve A hydraulic control main line M10, and surface wing valve A return oil branch R7.

[0076] The input terminal I1 of the pilot branch L1 of the emergency shutdown system 1 / 2 level is connected to the common part of the emergency shutdown system 1 / 2 level main pressure supply terminal of the wellhead control panel. The output terminal of the pilot branch L1 of the emergency shutdown system 1 / 2 level passes through the rear plate of the module and is connected to the downhole safety valve pilot control main line via the module's main shutdown hand valve MVR1.1. The output terminal of the downhole safety valve pilot control main line is connected to the pilot terminal of the downhole safety valve hydraulic control three-way valve group IVM2.1. The downhole safety valve hydraulic control three-way valve group IVM2.1 is connected to the downhole safety valve hydraulic control main line H and the downhole safety valve return oil branch R10, respectively.

[0077] The input terminal I2 of the emergency shutdown system level 3 pilot branch L2 is connected to the common part emergency shutdown system level 3 main pressure supply terminal. The emergency shutdown system level 3 pilot branch L2 passes through the rear plate of the module and is connected to the downhole safety valve pilot control main line via the surface safety valve pilot control relay valve PV1.1. The output terminal of the emergency shutdown system level 3 pilot branch L2 is connected to the surface main valve pilot control main line via the surface safety valve shut-off hand pull valve MVB1.1. The output terminal of the surface main valve pilot control main line is connected to the pilot terminal of the surface main valve hydraulic control three-way valve group IVM1.3. The surface main valve hydraulic control three-way valve group IVM1.3 is connected to the surface main valve hydraulic control main line M12 and the surface main valve return oil branch R9 respectively.

[0078] The input branch L9 of the ground wing valve B shut-off manual pull valve is connected to the ground safety valve shut-off manual pull valve MVB1.1. The output of the input branch L9 of the ground wing valve B shut-off manual pull valve is connected to the pilot control main circuit of the ground wing valve B via the ground wing valve B shut-off manual pull valve MVB1.3. The output of the pilot control main circuit of the ground wing valve B is connected to the pilot end of the hydraulic control three-way valve group IVM1.2 of the ground wing valve B. The hydraulic control three-way valve group IVM1.2 of the ground wing valve B is connected to the hydraulic control main circuit M11 of the ground wing valve B and the return oil branch R8 of the ground wing valve B.

[0079] The input branch L11 of the ground wing valve A shut-off manual valve is connected to the ground safety valve shut-off manual valve MVB1.1. The output of the input branch L11 of the ground wing valve A shut-off manual valve is connected to the pilot control main circuit of the ground wing valve A via the ground wing valve A shut-off manual valve MVB1.2. The output of the pilot control main circuit of the ground wing valve A is connected to the pilot end of the hydraulic control three-way valve group IVM1.1 of the ground wing valve A. The hydraulic control three-way valve group IVM1.1 of the ground wing valve A is connected to the hydraulic control main circuit M10 of the ground wing valve A and the return oil branch R7 of the ground wing valve A.

[0080] The pressure of this single-well control module is supplied by a common component, respectively through the input terminals I1 of the emergency shut-off system level 1 / 2 pilot branch L1, I2 of the emergency shut-off system level 3 pilot branch L2, I3 of the working pressure input terminal I10 of the surface wing valve A hydraulic control main line M11, I4 of the surface wing valve B hydraulic control main line M11, I5 of the surface main valve hydraulic control main line M12, and I6 of the downhole safety valve hydraulic control main line H, to the emergency shut-off system level 1 / 2 pilot and emergency shut-off system level 3 pilot. Pressure is supplied to the surface wing valve A hydraulic control main line M10, surface wing valve B hydraulic control main line M11, surface main valve hydraulic control main line M12, and downhole safety valve hydraulic control main line H. The emergency shutdown system 1 / 2 stage pilot isolation ball valve BV1.1, emergency shutdown system 3 stage pilot isolation ball valve BV1.2, surface wing valve A hydraulic control input isolation ball valve BV2.1, surface wing valve B hydraulic control input isolation ball valve BV2.2, surface main valve hydraulic control input isolation ball valve BV2.3, and downhole safety valve hydraulic control input isolation ball valve BV3.1, completing the module pressure supply.

[0081] Therefore, the single-well control module of the present invention has 1 / 2-level control of the emergency shut-off system, 3-level control of the emergency shut-off system, shut-off control of surface wing valve B and shut-off control of surface wing valve A, and can realize four-valve control of downhole safety valve, surface main valve, surface wing valve B and surface wing valve A, and realize the well opening / closing sequence requirements and remote well shut-off operation through a distributed control system.

[0082] Furthermore, this single-well control module uses multiple highly integrated valve groups for pipeline connection, which can significantly reduce the length of pipelines and the number of joints, effectively reduce the number of leakage points, improve the sealing performance, reliability and maintenance convenience of the system pipeline connection, and realize the integration and standardization of the single-well control module.

[0083] Operating conditions of ground wing valve A and ground wing valve B:

[0084] 1. Under normal production conditions (most commonly used), surface wing valve A serves as the main oil outlet channel, and downhole oil and gas are directly transported to the gathering and transportation pipeline via surface wing valve A; surface wing valve B is in hot standby mode and does not participate in production.

[0085] II. Injection-related operating conditions (water injection, gas injection, agent injection)

[0086] 1. Water / gas injection for oil recovery (injection-production well, gas-drive well): Surface wing valve A is used for normal oil production and is kept open. Surface wing valve B is opened to serve as a water / gas injection channel, connecting to the water injection pipeline / gas injection pipeline to achieve water injection, gas injection, CO2 injection, etc.

[0087] 2. Chemical agent injection (wax removal, corrosion inhibition, demulsification, viscosity reduction): Ground wing valve A continues to operate, ground wing valve B is opened, and wax removal agent, corrosion inhibitor, and demulsifier are injected.

[0088] III. Testing and Measurement Conditions

[0089] 1. For single-well production / pressure testing, surface wing valve A is temporarily closed or flow is limited, and surface wing valve B is opened. Connect the test separator and flow meter to measure production, pressure, and fluid properties. After the test is completed, switch back to surface wing valve A for production.

[0090] 2. Long-term online metering: Ground valve A is connected to the main oil pipeline, and ground valve B is connected to the online metering device to monitor production in real time.

[0091] IV. Downhole Operations / Well Workover Conditions (Operations without Production Shutdown)

[0092] 1. For steel wire / cable operations (pressure testing, temperature testing, water locating, and wax removal), ground wing valve A remains open for normal production. Ground wing valve B is opened as an operation channel for lowering testing / wax removal tools, and main production is not affected.

[0093] 2. For fracturing, acidizing, coiled tubing, and sand control operations, surface valve A is closed and isolated, while surface valve B serves as the main operating channel for fracturing / acidizing; after the operation is completed, surface valve A is restored to operation.

[0094] like Figure 7 The downhole safety valve hydraulic control three-way valve group IVM2.1 has a first three-way valve A1, a first check valve A2, and a first relief valve A3. The pilot end of the first three-way valve A1 is connected to the output end of the downhole safety valve pilot control main circuit. The first three-way valve A1 and the first check valve A2 are both connected to the downhole safety valve hydraulic control main circuit H. The two ends of the first relief valve A3 are respectively connected to the downhole safety valve hydraulic control main circuit H and the downhole safety valve return oil branch. The return oil end of the first three-way valve A1 is connected to the downhole safety valve return oil branch.

[0095] The first relief valve A3 is preferably a proportional relief valve, and the first three-way valve A1 is preferably a hydraulically controlled three-way valve, which can withstand higher pressure output. Integrating the first three-way valve A1, the first check valve A2, and the first relief valve A3 into a valve group that can completely replace the functions of these three valves can effectively reduce the pipeline connection length between the downhole safety valve pilot control main line, the downhole safety valve hydraulic control main line H, and the downhole safety valve return oil branch line, reduce the number of bends, and reduce the number of leakage points.

[0096] like Figure 8The ground main valve hydraulic three-way valve assembly IVM1.3 has a second three-way valve B1, a second check valve B2, and a second relief valve B3. The pilot end of the second three-way valve B1 is connected to the pilot control main circuit of the ground main valve. Both the second three-way valve B1 and the second check valve B2 are connected to the hydraulic control main circuit M12 of the ground main valve. The two ends of the second relief valve B3 are connected to the hydraulic control main circuit M12 of the ground main valve and the return oil branch of the ground main valve, respectively. The return oil end of the second three-way valve B1 is connected to the return oil branch of the ground main valve.

[0097] The second relief valve B3 is preferably a proportional relief valve, and the second three-way valve B1 is preferably a hydraulically controlled three-way valve, which can withstand higher pressure output. Integrating the second three-way valve B1, the second check valve B2, and the second relief valve B3 into a valve group that can completely replace the functions of these three valves can effectively reduce the pipeline connection length between the pilot control main line of the ground main valve, the hydraulic control main line M12 of the ground main valve, and the return oil branch of the ground main valve, thereby reducing the number of bends and reducing the number of leakage points.

[0098] like Figure 9 The ground wing valve B hydraulic control three-way valve group IVM1.2 has a third three-way valve C1, a third check valve C2 and a third relief valve C3. The pilot end of the third three-way valve C1 is connected to the pilot control main circuit of the ground wing valve B. The third three-way valve C1 and the third check valve C2 are both connected to the hydraulic control main circuit M11 of the ground wing valve B. The third relief valve C3 is connected to the return oil branch of the ground wing valve B. The return oil end of the third three-way valve C1 is connected to the return oil branch of the ground wing valve B.

[0099] The third relief valve C3 is preferably a proportional relief valve, and the third three-way valve C1 is preferably a hydraulically controlled three-way valve, which can withstand higher pressure output. Integrating the three valves, namely the third three-way valve C1, the third check valve C2, and the third relief valve C3, into a valve group that can completely replace the functions of these three valves can effectively reduce the pipeline connection length between the pilot control main line of the ground wing valve B, the hydraulic control main line M11 of the ground wing valve B, and the return oil branch of the ground wing valve B, thereby reducing the number of bends and reducing the number of leakage points.

[0100] Similarly, as Figure 10 The ground wing valve A hydraulic control three-way valve group IVM1.1 has a fourth three-way valve D1, a fourth check valve D2 and a fourth relief valve D3. The pilot end of the fourth three-way valve D1 is connected to the pilot control main circuit of the ground wing valve A. The fourth three-way valve D1 and the fourth check valve D2 are both connected to the hydraulic control main circuit M10 of the ground wing valve A. The fourth relief valve D3 is connected to the return oil branch of the ground wing valve A. The return oil end of the fourth three-way valve D1 is connected to the return oil branch of the ground wing valve A.

[0101] The fourth relief valve D3 is preferably a proportional relief valve, and the fourth three-way valve D1 is preferably a hydraulically controlled three-way valve, which can withstand higher pressure output. Integrating the four valves, the fourth one-way valve D2 and the fourth relief valve D3 into a valve group that can completely replace the functions of these three valves can effectively reduce the pipeline connection length between the pilot control main line of the ground wing valve A, the hydraulic control main line M10 of the ground wing valve A and the return oil branch of the ground wing valve A, reduce the number of bends, and reduce the number of leakage points.

[0102] The outlet and pilot end of the module main shut-off manual valve MVR1.1 are connected via the module main shut-off manual valve pilot self-locking branch L3. The pilot end of the ground safety valve pilot control relay valve PV1.1 is connected to the outlet end of the module main shut-off manual valve MVR1.1 via the ground relay valve pilot control branch L4. The return end of the ground safety valve pilot control relay valve PV1.1 is connected to the pilot return branch R1 via the ground relay valve return branch R3.

[0103] The return oil end of the module main shut-off manual valve MVR1.1 is connected to the pilot return oil branch R1 via the module main shut-off manual valve return oil branch R2.

[0104] The downhole safety valve pilot control main circuit includes a downhole safety valve pilot control branch L5 and a downhole safety valve pilot delay branch L19. The inflow end of the downhole safety valve pilot control branch L5 is connected to the outlet end of the module's main shut-off manual valve MVR1.1. The outflow end of the downhole safety valve pilot control branch L5 is connected to the downhole safety valve pilot delay branch L19 via the downhole safety valve pilot one-way throttle valve FCV1.2. The outflow end of the downhole safety valve pilot delay branch L19 is connected to the pilot end of the downhole safety valve hydraulic control three-way valve group IVM2.1.

[0105] The emergency shutdown system's 1 / 2-stage pilot pressure is applied to the inlet of the module's main shutdown manual valve MVR1.1. After pulling up the valve lever of the module's main shutdown manual valve MVR1.1, the valve opens. The pressure flows through the pilot self-locking branch L3 of the module's main shutdown manual valve MVR1.1 to the valve's pilot end. Releasing the valve lever keeps the valve open. The pressure also flows through the surface relay valve pilot control branch L4 to the pilot end of the surface safety valve pilot control relay valve PV1.1. The surface safety valve pilot control relay valve PV1.1 remains open. Finally, the pressure flows through the downhole safety valve pilot control branch L5 to the inlet of the downhole safety valve pilot one-way throttle valve.

[0106] The outlet of the ground safety valve pilot control relay valve PV1.1 is connected to the input branch L6 of the ground shut-off manual valve. The input branch L6 of the ground shut-off manual valve is connected to the pilot control main line of the ground main valve via the ground safety valve shut-off manual valve MVB1.1.

[0107] The outlet end of the ground safety valve shut-off manual valve MVB1.1 is connected to the pilot end through the pilot self-locking branch L7 of the ground shut-off manual valve.

[0108] The return oil end of the ground safety valve shut-off manual pull valve MVB1.1 is connected to the ground shut-off manual pull valve return oil branch R4, and the outflow end of the ground shut-off manual pull valve return oil branch R4 is connected to the pilot return oil branch R1.

[0109] The ground main valve pilot control main circuit includes a ground main valve pilot control branch L8 and a ground main valve pilot delay branch L17. The inflow end of the ground main valve pilot control branch L8 is connected to the outlet end of the ground safety valve shut-off hand valve MVB1.1. The outflow end of the ground main valve pilot control branch L8 is connected to the ground main valve pilot delay branch L17 via the ground main valve pilot one-way throttle valve FCV1.1. The outflow end of the ground main valve pilot delay branch L17 is connected to the pilot end of the ground main valve hydraulic three-way valve group IVM1.3.

[0110] The emergency shutdown system's level 3 pilot pressure is supplied to the inlet of the ground safety valve pilot control relay valve PV1.1. As mentioned above, the ground safety valve pilot control relay valve PV1.1 is already open. Therefore, the pressure flows through the ground shutdown manual valve input branch L6 to the inlet of the ground safety valve shutdown manual valve MVB1.1. After pulling the lever of the ground safety valve shutdown manual valve MVB1.1, the valve opens. The pressure then flows through the ground shutdown manual valve pilot self-locking branch L7 to the valve's pilot end. Releasing the valve lever keeps the valve open. The pressure also flows through the ground main valve pilot control branch L8 to the inlet of the ground main valve pilot one-way throttle valve; through the ground wing valve B shutdown manual valve input branch L9 to the inlet of the ground wing valve B shutdown manual valve MVB1.3; and through the ground wing valve A shutdown manual valve input branch L11 to the inlet of the ground wing valve A shutdown manual valve MVB1.2.

[0111] The outlet of the pilot control relay valve PV1.1 of the ground safety valve is connected to the input branch L9 of the ground wing valve B shut-off manual valve. The input branch L9 of the ground wing valve B shut-off manual valve is connected to the pilot control main line of the ground wing valve B via the ground wing valve B shut-off manual valve MVB1.3.

[0112] The outlet end of the ground wing valve B shut-off manual valve MVB1.3 is connected to the pilot end through the pilot self-locking branch L12 of the ground wing valve B shut-off manual valve.

[0113] The return oil end of the ground wing valve B shut-off manual pull valve MVB1.3 is connected to the return oil branch R5 of the ground wing valve B shut-off manual pull valve, and the outflow end of the return oil branch R5 of the ground wing valve B shut-off manual pull valve is connected to the pilot return oil branch R1.

[0114] The outflow section of the pilot control main line of the ground wing valve B is also connected to the pilot indicator branch L16 of the ground wing valve B, and the outflow end of the pilot indicator branch L16 of the ground wing valve B is connected to the pilot indicator PI1.2 of the ground wing valve B.

[0115] After pulling up the lever of the ground wing valve B shut-off manual valve MVB1.3, the valve opens, and the pressure flows to the pilot end of the valve through the pilot self-locking branch L12 of the ground wing valve B shut-off manual valve. When the valve lever is released, the valve remains open; the pressure also flows to the pilot end of the ground wing valve B hydraulic three-way valve group IVM1.2 through the pilot control branch L10 of the ground wing valve B.

[0116] The outlet of the ground safety valve pilot control relay valve PV1.1 is connected to the input branch L11 of the ground wing valve A shut-off manual valve. The input branch L11 of the ground wing valve A shut-off manual valve is connected to the pilot control main line of the ground wing valve A via the ground wing valve A shut-off manual valve MVB1.2.

[0117] The outlet end of the ground wing valve A shut-off manual valve MVB1.2 is connected to the pilot end through the pilot self-locking branch L13 of the ground wing valve A shut-off manual valve.

[0118] The return oil end of the ground wing valve A shut-off manual pull valve MVB1.2 is connected to the return oil branch R6 of the ground wing valve A shut-off manual pull valve, and the outflow end of the return oil branch R6 of the ground wing valve A shut-off manual pull valve is connected to the pilot return oil branch R1.

[0119] The outflow section of the pilot control main line of ground wing valve A is also connected to the pilot indicator branch L15 of ground wing valve A, and the outflow end of the pilot indicator branch L15 of ground wing valve A is connected to the pilot indicator PI1.1 of ground wing valve A.

[0120] Similarly, after pulling up the lever of the ground wing valve A shut-off manual valve MVB1.2, the valve opens, and the pressure flows to the pilot end of the valve through the pilot self-locking branch L13 of the ground wing valve A shut-off manual valve. When the valve lever is released, the valve remains open; the pressure also flows to the pilot end of the ground wing valve A hydraulic control three-way valve group IVM1.1 through the pilot control branch L14 of the ground wing valve A.

[0121] The outflow section of the downhole safety valve pilot control main line is also connected to the downhole safety valve pilot indicator branch L20, and the outflow end of the downhole safety valve pilot indicator branch L20 is connected to the downhole safety valve pilot indicator PI1.4.

[0122] The outflow section of the ground main valve pilot control main line is also connected to the ground main valve pilot indicator branch L18, and the outflow end of the ground main valve pilot indicator branch L18 is connected to the ground main valve pilot indicator PI1.3.

[0123] The outflow section of the downhole safety valve hydraulic control main line H is connected to the downhole safety valve hydraulic control output pressure gauge PG2.1 via the downhole safety valve hydraulic control output pressure gauge branch line H3.

[0124] The outflow section of the ground main valve hydraulic control main line M12 is connected to the ground main valve hydraulic control output pressure gauge PG1.3 via the ground main valve hydraulic control output pressure gauge branch line M9.

[0125] The outflow section of the hydraulic control main line M11 of the ground wing valve B is connected to the hydraulic control output pressure gauge PG1.2 of the ground wing valve B via the hydraulic control output pressure gauge branch line M6.

[0126] The outflow section of the hydraulic control main line M10 of ground wing valve A is connected to the hydraulic control output pressure gauge PG1.1 of ground wing valve A via the hydraulic control output pressure gauge branch line M3.

[0127] The pilot one-way throttle valve FCV1.1 of the surface main valve and the pilot one-way throttle valve FCV1.2 of the downhole safety valve can allow pressure to flow rapidly in the forward direction. The pressure of the pilot one-way throttle valve FCV1.1 of the surface main valve flows through the pilot delay branch L17 of the surface main valve to the pilot end of the hydraulic control three-way valve group IVM1.3 of the surface main valve, and then flows through the pilot indicator branch L18 of the surface main valve to the pilot indicator of the surface main valve, so as to make it work.

[0128] The pressure of the downhole safety valve pilot one-way throttle valve FCV1.2 flows through the downhole safety valve pilot delay branch L19 to the pilot end of the downhole safety valve hydraulic three-way valve group IVM2.1, and then through the downhole safety valve pilot indicator branch L20 to the downhole safety valve pilot indicator PI1.4, thus activating it.

[0129] The pressure in the pilot control branch L10 of the ground wing valve B is transmitted through the pilot indicator branch L16 of the ground wing valve B, causing the pilot indicator PI1.2 of the ground wing valve B to operate.

[0130] The pressure in the pilot control branch L14 of ground wing valve A is transmitted through the pilot indicator branch L15 of ground wing valve A, causing the pilot indicator PI1.1 of ground wing valve A to operate.

[0131] The pressure at the working pressure input terminal I3 of ground wing valve A flows to the inlet terminal of the hydraulic control three-way valve group IVM1.1 of ground wing valve A. Because there is pilot pressure, the valve group IVM1.1 of ground wing valve A is in the open state. The pressure is respectively connected to the working pressure output terminal O1 of ground wing valve A through the hydraulic control output branch M2 of ground wing valve A, thereby outputting the pressure of ground wing valve A.

[0132] The pressure at the working pressure input terminal I4 of ground wing valve B flows to the inlet terminal of the hydraulic control three-way valve group IVM1.2 of ground wing valve B. Because there is pilot pressure, the valve group IVM1.2 of ground wing valve B is in the open state. The pressure is respectively connected to the working pressure output terminal O2 of ground wing valve B through the hydraulic control output branch M5 of ground wing valve B, thereby outputting the pressure of ground wing valve B.

[0133] The pressure at the working pressure input terminal I5 of the ground main valve flows to the inlet terminal of the ground main valve hydraulic control three-way valve group IVM1.3. Because there is pilot pressure, the valve group IVM1.3 is in the open state. The pressure is respectively through the ground main valve hydraulic control output branch M8 to make the ground main valve hydraulic control output pressure gauge PG1.3 work. The ground main valve hydraulic control output branch M8 is connected to the working pressure output terminal O3 of the ground main valve, thereby outputting the pressure of the ground main valve.

[0134] The pressure at the working pressure input terminal I6 of the downhole safety valve flows to the inlet terminal of the downhole safety valve hydraulic control three-way valve group IVM2.1. Because there is pilot pressure, the downhole safety valve hydraulic control three-way valve group IVM2.1 is in the open state. The pressure is respectively connected to the working pressure output terminal O4 of the downhole safety valve through the hydraulic control output branch H2 of the downhole safety valve, thereby outputting the pressure of the downhole safety valve.

[0135] After pressurizing the common area, when opening the module, first pull up the lever of the module's main shut-off manual valve MVR1.1. The downhole safety valve pilot indicator PI1.4 will change from red to green. Once the downhole safety valve hydraulic output pressure gauge PG2.1 shows a reading, release the lever, and the downhole safety valve will open. Next, pull up the lever of the surface safety valve shut-off manual valve MVB1.1. The surface main valve pilot indicator PI1.3 will change from red to green. Once the surface main valve hydraulic output pressure gauge PG1.3 shows a reading, release the lever, and the surface main valve will open. Open; finally, you can open either the manual shut-off valve MVB1.2 of ground wing valve A or the manual shut-off valve MVB1.3 of ground wing valve B. Pull up the lever of the manual shut-off valve MVB1.2 of ground wing valve A or the manual shut-off valve MVB1.3 of ground wing valve B. The color of the pilot indicator PI1.1 of ground wing valve A or the pilot indicator PI1.2 of ground wing valve B will change from red to green. After the hydraulic output pressure gauge PG1.1 of ground wing valve A or the hydraulic output pressure gauge PG1.2 of ground wing valve B shows a reading, release the lever, and ground wing valve A or wing valve B will open.

[0136] When shutting down the module, the manual shut-off valves MVB1.2 and MVB1.3 of surface wing valve A and B can be closed arbitrarily. Pushing down the lever of the manual shut-off valve MVB1.2 of surface wing valve A or MVB1.3 of surface wing valve B will immediately change the color of the pilot indicator PI1.1 of surface wing valve A or PI1.2 of surface wing valve B from green to red. The reading of the hydraulic control output pressure gauge PG1.1 of surface wing valve A or PG1.2 of surface wing valve B will immediately drop to 0. The colors of the pilot indicator PI1.4 of the downhole safety valve and the pilot indicator PI1.3 of the surface main valve, as well as the readings of the hydraulic control output pressure gauge PG2.1 of the downhole safety valve and the hydraulic control output pressure gauge PG1.3 of the surface main valve will not be affected. The well shut-down operation of surface wing valves A and B is completed. The levers of the manual shut-off valves MVB1.2 of surface wing valve A and MVB1.3 of surface wing valve B will then be reset. Pushing down the handle of the surface safety valve shut-off manual valve MVB1.1 immediately changes the color of the pilot indicator PI1.1 for surface wing valve A and the pilot indicator PI1.2 for surface wing valve B from green to red. The readings of the hydraulic control output pressure gauges PG1.1 for surface wing valve A and PG1.2 for surface wing valve B immediately drop to 0. The color of the pilot indicator PI1.3 for the surface main valve changes from green to red after a delay, and the reading of the hydraulic control output pressure gauge PG1.3 for the surface main valve drops to 0 after a delay. The color of the pilot indicator PI1.4 for the downhole safety valve and the reading of the hydraulic control output pressure gauge PG2.1 for the downhole safety valve remain unaffected. The surface main valve, wing valve A, and wing valve B have completed the well shut-in operation. When resetting the handle, first reset the handle of the surface safety valve shut-off manual valve MVB1.1, then reset the handles of the surface wing valve shut-off manual valves MVB1.2 for surface wing valve A and MVB1.3 for surface wing valve B. Push down the lever of the main shut-off manual valve MVR1.1. The pilot indicator PI1.1 of surface wing valve A and the pilot indicator PI1.2 of surface wing valve B immediately change from green to red. The readings of the hydraulic control output pressure gauges PG1.1 of surface wing valve A and PG1.2 of surface wing valve B immediately drop to 0. The pilot indicator PI1.3 of the surface main valve changes from green to red after a delay. The reading of the hydraulic control output pressure gauge PG1.3 of the surface main valve drops to 0 after a delay. The pilot indicator PI1.4 of the downhole safety valve changes from green to red, and the reading of the hydraulic control output pressure gauge PG2.1 of the downhole safety valve finally drops to 0. The downhole safety valve, the surface main valve, wing valve A, and wing valve B complete the well shut-in operation.

[0137] Therefore, the well shut-in sequence of the module is as follows: surface wing valve A or wing valve B can be shut down individually, without affecting the surface main valve and the downhole safety valve; after the surface main valve is shut down, surface wing valves A and B are shut down immediately, the surface main valve is shut down after a delay, and the downhole safety valve is unaffected; after the downhole safety valve is shut down, surface wing valves A and B are shut down immediately, the surface main valve is shut down after a delay, and the downhole safety valve is shut down last.

[0138] The key components controlling the downhole safety valve, the surface main valve, and surface wing valves A and B are the following modules: downhole safety valve hydraulic control three-way valve assembly IVM2.1, surface main valve hydraulic control three-way valve assembly IVM1.3, surface wing valve A hydraulic control three-way valve assembly IVM1.1, and surface wing valve B hydraulic control three-way valve assembly IVM1.2; surface wing valve A hydraulic control three-way valve assembly IVM1.1, surface wing valve B hydraulic control three-way valve assembly IVM1.2, and surface main valve hydraulic control three-way valve assembly IVM1.2. The three-way valve group IVM1.3 and the downhole safety valve hydraulic three-way valve group IVM2.1 combine the functions of a check valve, a hydraulic three-way valve, and a proportional relief valve into one valve group. This group controls the switching of the hydraulic lines of the surface wing valve A hydraulic three-way valve group IVM1.1, the surface wing valve B hydraulic three-way valve group IVM1.2, the surface main valve hydraulic three-way valve group IVM1.3, and the downhole safety valve hydraulic three-way valve group IVM2.1.

[0139] 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 integrating multiple valve groups, applied in the wellhead safety control system of oil and gas wells, characterized in that, include: The output end of the 1 / 2 level pilot branch of the emergency shutdown system is connected to the downhole safety valve pilot control main line via the module main shutdown hand pull valve. The output end of the downhole safety valve pilot control main line is connected to the pilot end of the downhole safety valve hydraulic control three-way valve group. The downhole safety valve hydraulic control three-way valve group is connected to the downhole safety valve hydraulic control main line and the downhole safety valve return oil branch line respectively. The emergency shutdown system has a level 3 pilot branch, which is connected to the downhole safety valve pilot control main line via a surface safety valve pilot control relay valve. The output end of the emergency shutdown system has a level 3 pilot branch connected to the surface main valve pilot control main line via a surface safety valve shut-off manual valve. The output end of the surface main valve pilot control main line is connected to the pilot end of the surface main valve hydraulic control three-way valve group. The surface main valve hydraulic control three-way valve group is connected to the surface main valve hydraulic control main line and the surface main valve return oil branch, respectively. The input branch of the ground wing valve B shut-off manual pull valve is connected to the ground safety valve shut-off manual pull valve. The output of the input branch of the ground wing valve B shut-off manual pull valve is connected to the pilot control main line of the ground wing valve B via the ground wing valve B shut-off manual pull valve. The output of the pilot control main line of the ground wing valve B is connected to the pilot end of the hydraulic control three-way valve group of the ground wing valve B. The hydraulic control three-way valve group of the ground wing valve B is connected to the hydraulic control main line of the ground wing valve B and the return oil branch of the ground wing valve B respectively. Additionally, the input branch of the ground wing valve A shut-off manual pull valve is connected to the ground safety valve shut-off manual pull valve at its input end. The output end of the input branch of the ground wing valve A shut-off manual pull valve is connected to the pilot control main line of the ground wing valve A via the ground wing valve A shut-off manual pull valve. The output end of the pilot control main line of the ground wing valve A is connected to the pilot end of the hydraulic control three-way valve group of the ground wing valve A. The hydraulic control three-way valve group of the ground wing valve A is connected to the hydraulic control main line of the ground wing valve A and the return oil branch of the ground wing valve A, respectively.

2. The single-well control module with integrated multi-valve group according to claim 1, characterized in that, The downhole safety valve hydraulic control 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 downhole safety valve pilot control main circuit. Both the first three-way valve and the first check valve are connected to the downhole safety valve hydraulic control main circuit. The two ends of the first relief valve are respectively connected to the downhole safety valve hydraulic control main circuit and the downhole safety valve return oil branch circuit. The return oil end of the first three-way valve is connected to the downhole safety valve return oil branch circuit. The ground main valve 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 pilot control main circuit of the ground main valve. Both the second three-way valve and the second check valve are connected to the hydraulic control main circuit of the ground main valve. The two ends of the second relief valve are respectively connected to the hydraulic control main circuit of the ground main valve and the return oil branch of the ground main valve. The return oil end of the second three-way valve is connected to the return oil branch of the ground main valve. The ground wing valve B hydraulic control three-way valve group has 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 pilot control main circuit of the ground wing valve B. The third three-way valve and the third check valve are both connected to the hydraulic control main circuit of the ground wing valve B. The third relief valve is connected to the oil return branch of the ground wing valve B. The oil return end of the third three-way valve is connected to the oil return branch of the ground wing valve B. The ground wing valve A hydraulic control three-way valve group has a fourth three-way valve, a fourth check valve and a fourth relief valve. The pilot end of the fourth three-way valve is connected to the pilot control main circuit of the ground wing valve A. The fourth three-way valve and the fourth check valve are both connected to the hydraulic control main circuit of the ground wing valve A. The fourth relief valve is connected to the return oil branch of the ground wing valve A. The return oil end of the fourth three-way valve is connected to the return oil branch of the ground wing valve A.

3. The single-well control module with integrated multi-valve group according to claim 2, characterized in that, The outlet end and the pilot end of the module's main shut-off manual valve are connected through the module's main shut-off manual valve pilot self-locking branch. The pilot end of the ground safety valve pilot control relay valve is connected to the outlet end of the module's main shut-off manual valve via the ground relay valve pilot control branch. The return oil end of the pilot control relay valve of the ground safety valve is connected to the pilot return oil branch through the return oil branch of the ground relay valve. The return oil end of the module's main shut-off manual valve is connected to the pilot return oil branch via the module's main shut-off manual valve return oil branch.

4. The single-well control module with integrated multi-valve group according to claim 3, characterized in that, The downhole safety valve pilot control main circuit includes a downhole safety valve pilot control branch and a downhole safety valve pilot delay branch. The inflow end of the downhole safety valve pilot control branch is connected to the outlet end of the module's main shut-off manual valve. The outflow end of the downhole safety valve pilot control branch is connected to the downhole safety valve pilot delay branch via a downhole safety valve pilot one-way throttle valve. The outflow end of the downhole safety valve pilot delay branch is connected to the pilot end of the downhole safety valve hydraulic control three-way valve assembly.

5. The single-well control module with integrated multi-valve group according to claim 2, characterized in that, The outlet end of the ground safety valve pilot control relay valve is connected to the input branch of the ground shut-off manual valve, and the input branch of the ground shut-off manual valve is connected to the pilot control main line of the ground main valve via the ground safety valve shut-off manual valve. The outlet end of the ground safety valve shut-off manual valve and the pilot end are connected through the pilot self-locking branch of the ground shut-off manual valve. The return oil end of the ground safety valve shut-off manual pull valve is connected to the return oil branch of the ground shut-off manual pull valve, and the outflow end of the return oil branch of the ground shut-off manual pull valve is connected to the pilot return oil branch.

6. The single-well control module with integrated multi-valve group according to claim 5, characterized in that, The ground main valve pilot control main circuit includes a ground main valve pilot control branch and a ground main valve pilot delay branch. The inflow end of the ground main valve pilot control branch is connected to the outlet end of the ground safety valve shut-off manual valve. The outflow end of the ground main valve pilot control branch is connected to the ground main valve pilot delay branch via a ground main valve pilot one-way throttle valve. The outflow end of the ground main valve pilot delay branch is connected to the pilot end of the ground main valve hydraulic three-way valve assembly.

7. The single-well control module with integrated multi-valve group according to claim 2, characterized in that, The outlet end of the pilot control relay valve of the ground safety valve is connected to the input branch of the shut-off manual valve of the ground wing valve B, and the input branch of the shut-off manual valve of the ground wing valve B is connected to the pilot control main line of the ground wing valve B via the shut-off manual valve of the ground wing valve B. The outlet end and the pilot end of the ground wing valve B shut-off manual pull valve are connected through the pilot self-locking branch of the ground wing valve B shut-off manual pull valve. The return oil end of the ground wing valve B shut-off hand pull valve is connected to the return oil branch of the ground wing valve B shut-off hand pull valve, and the outflow end of the return oil branch of the ground wing valve B shut-off hand pull valve is connected to the pilot return oil branch. The outflow section of the main pilot control path of the ground wing valve B is also connected to the pilot indicator branch of the ground wing valve B, and the outflow end of the pilot indicator branch of the ground wing valve B is connected to the pilot indicator of the ground wing valve B.

8. The single-well control module with integrated multi-valve group according to claim 2, characterized in that, The outlet end of the pilot control relay valve of the ground safety valve is connected to the input branch of the shut-off manual valve of the ground wing valve A, and the input branch of the shut-off manual valve of the ground wing valve A is connected to the pilot control main line of the ground wing valve A via the shut-off manual valve of the ground wing valve A. The outlet end and the pilot end of the ground wing valve A shut-off manual pull valve are connected through the pilot self-locking branch of the ground wing valve A shut-off manual pull valve. The return oil end of the ground wing valve A shut-off hand pull valve is connected to the return oil branch of the ground wing valve A shut-off hand pull valve, and the outflow end of the return oil branch of the ground wing valve A shut-off hand pull valve is connected to the pilot return oil branch. The outflow section of the pilot control main path of the ground wing valve A is also connected to the pilot indicator branch of the ground wing valve A, and the outflow end of the pilot indicator branch of the ground wing valve A is connected to the pilot indicator of the ground wing valve A.

9. The single-well control module with integrated multi-valve group according to claim 1, characterized in that, The outflow section of the downhole safety valve pilot control main circuit is also connected to a downhole safety valve pilot indicator branch circuit, and the outflow end of the downhole safety valve pilot indicator branch circuit is connected to a downhole safety valve pilot indicator. The outflow section of the ground main valve pilot control main line is also connected to the ground main valve pilot indicator branch, and the outflow end of the ground main valve pilot indicator branch is connected to the ground main valve pilot indicator.

10. The single-well control module with integrated multi-valve group according to claim 1, characterized in that, The outflow section of the downhole safety valve hydraulic control main circuit is connected to the downhole safety valve hydraulic control output pressure gauge via the downhole safety valve hydraulic control output pressure gauge branch circuit. The outflow section of the hydraulic control main circuit of the ground main valve is connected to the hydraulic control output pressure gauge of the ground main valve via the hydraulic control output pressure gauge branch circuit. The outflow section of the hydraulic control main circuit of the ground wing valve B is connected to the hydraulic control output pressure gauge of the ground wing valve B via the hydraulic control output pressure gauge branch circuit. The outflow section of the hydraulic control main circuit of the ground wing valve A is connected to the hydraulic control output pressure gauge of the ground wing valve A via the branch circuit of the hydraulic control output pressure gauge of the ground wing valve A.

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