A wellhead safety control system skid

Abstract

The application discloses a wellhead safety control system prying equipment, the prying equipment sets the cabinet of the wellhead safety control system and the hydraulic safety valve on the installation base plate in parallel, the flange interfaces on both sides of the hydraulic safety valve are located above the installation base plate, the remote terminal unit of the wellhead safety control system is electrically connected with the electric execution end of the hydraulic safety valve, the hydraulic control safety valve module is used to form a loop with the quick discharge interface of the hydraulic safety valve and the pilot valve of the hydraulic safety valve, and the hydraulic control safety valve module and the two flange interfaces of the hydraulic safety valve are respectively configured to be connected to the pipeline of the oil and gas wellhead; the application integrates and prys the hydraulic safety valve and the wellhead safety control system, solves the problem that the pipeline of the existing wellhead safety control system and the hydraulic safety valve is too long, and leads to high leakage risk and untimely signal feedback, and solves the defect that the installation, transportation and maintenance cost of the equipment is high due to the separate distribution of the existing wellhead safety control system and the hydraulic safety valve.

Description

Technical Field

[0001] This invention relates to the field of wellhead safety control system technology, and in particular to a skid-mounted device for a wellhead safety control system. Background Technology

[0002] In oil and gas wellhead safety systems, hydraulic safety valves and wellhead safety control systems often appear in pairs. The wellhead safety control system controls the hydraulic safety valve to open and close the oil and gas wellhead, ensuring safety during oil and gas extraction. This is the solution adopted by most well sites today. However, in most well sites, the wellhead safety control system and the hydraulic safety valve are often purchased and installed independently, requiring multiple pipeline connections. This increases the number of equipment pipeline connection points, thereby increasing the risk of leakage. Furthermore, excessive distance between the two can cause a long delay in the wellhead safety control system when controlling the hydraulic safety valve, preventing it from shutting off in time and increasing wellhead safety risks. In addition, the independent installation of the hydraulic safety valve and the wellhead safety control system also increases civil engineering, installation, and maintenance costs. When relocating to a new well site, both must be transported separately, increasing transportation costs. Summary of the Invention

[0003] This invention provides a skid-mounted device for a wellhead safety control system. The invention aims to solve the problems of excessively long connecting pipelines leading to high leakage risk and untimely signal feedback in existing wellhead safety control systems and hydraulic safety valves by integrating the hydraulic safety valve and the wellhead safety control system into a skid-mounted device. It also solves the disadvantages of high equipment installation, transportation and maintenance costs caused by the separate assembly of the existing wellhead safety control system and hydraulic safety valve.

[0004] This invention provides a skid-mounted device for a wellhead safety control system, including a mounting base plate, a wellhead safety control system, and a hydraulic safety valve. The cabinet of the wellhead safety control system and the hydraulic safety valve are mounted side by side on the mounting base plate, and the flange interfaces on both sides of the hydraulic safety valve are located above the mounting base plate.

[0005] The wellhead safety control system includes a remote terminal unit and a hydraulically controlled safety valve module;

[0006] The remote terminal unit is electrically connected to the electric actuator of the hydraulic safety valve;

[0007] The hydraulically controlled safety valve module is used to form a circuit with the quick-release interface of the hydraulically operated safety valve and the pilot valve of the hydraulically operated safety valve;

[0008] Furthermore, the hydraulic safety valve module and the two flange interfaces are respectively configured to be connected to the pipeline at the oil and gas wellhead.

[0009] In some embodiments, the hydraulic safety valve is provided with a first transmitter and a second transmitter. The first transmitter is connected to the flange interface on one side via a first needle valve, and the second transmitter is connected to the flange interface on the other side via a second needle valve. Furthermore, the first transmitter and the second transmitter are electrically connected to the remote terminal unit.

[0010] In some embodiments, multiple rows of cable trays are provided on the mounting base plate between the cabinet and the hydraulic safety valve. The wires connecting the remote terminal unit to the electric actuator of the hydraulic safety valve, the first transmitter, and the second transmitter are respectively arranged in the cable trays.

[0011] In some embodiments, the wire groove is cylindrical, and the top surface and side surface of the wire groove are respectively provided with a plurality of first heat dissipation holes and a plurality of second heat dissipation holes. The plurality of first heat dissipation holes and the plurality of second heat dissipation holes are arranged at intervals along the length direction of the wire groove. The first heat dissipation holes are arranged in one row, the second heat dissipation holes are arranged in multiple rows, and the diameter of the first heat dissipation holes is smaller than the diameter of the second heat dissipation holes.

[0012] In some embodiments, the hydraulic safety valve module is arranged side by side with the quick-release interface and the pipeline connecting to the pilot valve of the hydraulic safety valve, and is arranged above multiple rows of the cable trays.

[0013] In some embodiments, the cabinet is provided with a first interface, a second interface, a third interface, a fourth interface, and a fifth interface arranged side by side. The first interface is connected to the inflow end of the pilot valve via a first ball valve and a pipe. The second interface is connected to the outflow end of the pilot valve via a pipe. The third interface is connected to the inflow end of the quick-drain interface via a second ball valve and a pipe. The fourth interface is connected to the outflow end of the quick-drain interface via a pipe. The fifth interface is connected to the pipeline of the oil and gas well via a third ball valve.

[0014] In some embodiments, a splicing groove is provided on each side of the mounting base plate, wherein multiple splicing columns are spaced apart in the splicing grooves on opposite sides, and the arrangement direction of the splicing grooves on opposite sides is consistent with the arrangement direction of the flange interfaces on both sides of the hydraulic safety valve.

[0015] The splicing groove and the splicing column are configured to be spliced ​​with external components.

[0016] In some embodiments, the distance between the wellhead safety control system and the hydraulic safety valve is 0.8m-1.2m.

[0017] In some embodiments, the hydraulic safety valve is detachably mounted on the mounting base plate via a clamp.

[0018] In some embodiments, the wellhead safety control system further includes a hydraulic control module and a pilot control module, wherein the hydraulic control module and the pilot control module cooperate to control the opening of the hydraulic safety valve and to perform pressure relief protection on the hydraulic safety valve.

[0019] As can be seen from the above technical solutions, the present invention has the following advantages:

[0020] This skid-mounted unit places the wellhead safety control system cabinet and the hydraulic safety valve side-by-side on the mounting base. The flange interfaces on both sides of the hydraulic safety valve are located above the mounting base. The wellhead safety control system includes a remote terminal unit and a hydraulic safety valve module. The remote terminal unit is electrically connected to the electric actuator of the hydraulic safety valve and can send open / close commands to the hydraulic safety valve. The hydraulic safety valve module forms a circuit with the quick-release interface and the pilot valve of the hydraulic safety valve to control the opening / closing of the hydraulic safety valve and to perform operations on the hydraulic safety valve. The system includes pressure relief protection, and the two flange interfaces of the hydraulically controlled safety valve module and the hydraulically operated safety valve are respectively configured to be connected to the pipeline at the oil and gas wellhead, realizing fully electro-hydraulic automated control of the wellhead control panel of the oil and gas well. This invention solves the problems of excessively long connecting pipelines, resulting in high leakage risk and untimely signal feedback, in existing wellhead safety control systems and hydraulically operated safety valves by integrating the hydraulically operated safety valve and the wellhead safety control system into a skid-mounted system. It also solves the disadvantages of high equipment installation, transportation and maintenance costs caused by the separate assembly of the existing wellhead safety control system and hydraulically operated safety valve. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a schematic diagram of a skid-mounted device for a wellhead safety control system according to an embodiment of this application;

[0023] Figure 2 yes Figure 1 Enlarged view of region D in the middle;

[0024] Figure 3 yes Figure 1 An enlarged view of one corner of the mounting base shown;

[0025] Figure 4 yes Figure 1 The diagram shows the cable / hydraulic line connections for the skid-mounted equipment of the wellhead safety control system.

[0026] Figure 5 yes Figure 1 The diagram shows the system principle of the skid-mounted wellhead safety control system.

[0027] The meanings of the reference numerals in the attached figures are as follows:

[0028] 1. Mounting base plate; 11. Cable tray; 111. First heat dissipation hole; 112. Second heat dissipation hole; 12. Splicing groove; 13. Splicing column; 2. Wellhead safety control system; 21. Cabinet; 211. First interface; 212. Second interface; 213. Third interface; 214. Fourth interface; 215. Fifth interface; 22. Remote terminal unit; 3. Hydraulic safety valve; 31. Flange interface; 32. Electric actuator; 33. Quick-release interface; 4. Oil and gas wellhead pipeline; 5. Christmas tree;

[0029] A. Hydraulic control module; a1. Oil tank; a2. Manual pump; a3. First control check valve; a4. Electric pump; a5. Second control check valve; a6. First control pressure transmitter; a7. First control loop pressure gauge; a8. Control loop accumulator; a9. Control loop accumulator shut-off valve; a10. Control loop accumulator pressure relief valve; a11. Control loop proportional unloading valve; a12. Valve opening indicator; a13. Hydraulic three-way valve assembly; a14. Second control pressure transmitter; a15. Second control loop pressure gauge; a16. Level switch;

[0030] B. Pilot control module; b1. Pilot valve circuit pressure gauge; b2. Fusible plug circuit pressure gauge; b3. Fusible plug circuit pressure transmitter; b4. Pilot valve circuit relay valve; b5. Pilot valve circuit relay valve shielded valve; b6. One-way throttle valve; b7. Solenoid valve; b8. Solenoid valve shielded valve; b9. Manual relay valve; b10. Pilot circuit accumulator pressure relief valve; b11. Pilot circuit accumulator; b12. Pilot circuit accumulator shut-off valve; b13. Pilot circuit proportional unloading valve; b14. Pilot circuit pressure gauge; b15. Pilot circuit pressure regulating valve; b16. Third control check valve;

[0031] C. Hydraulic safety valve module; c1. Control loop shut-off valve; c2. Control loop quick exhaust valve; c3. First transmitter shut-off valve; c4. First transmitter; c5. Second transmitter shut-off valve; c6. Second transmitter; c7. Pilot valve shut-off valve; c8. Pilot valve; c9. Fusible plug; c10. Pilot valve loop shut-off valve; c11. Fusible plug loop shut-off valve. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] 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.

[0035] In oil and gas wellhead safety systems, the wellhead safety control system is used to operate hydraulic safety valves to open and close the wellhead, ensuring safety during oil and gas extraction. This is the solution adopted by most well sites today. In most well sites, the wellhead safety control system and the hydraulic safety valve are often purchased and installed independently, requiring multiple pipeline connections. This increases the number of equipment pipeline connection points, thereby increasing the risk of leakage. Furthermore, excessive distance between the two can cause a long delay in the wellhead safety control system when controlling the hydraulic safety valve, preventing it from closing in time and increasing wellhead safety risks. In addition, the independent installation of the hydraulic safety valve and the wellhead safety control system also increases civil engineering, installation, and maintenance costs. When relocating to a new well site, both must be transported separately, increasing transportation costs.

[0036] Clearly, integrating the wellhead safety control system with the hydraulic safety valve actuator on the same skid is the future trend of oil and gas wellhead safety systems, in order to solve the above problems.

[0037] like Figures 1-5As shown, this embodiment of the invention provides a skid-mounted wellhead safety control system 2, including a mounting base plate 1, a wellhead safety control system 2, and a hydraulic safety valve 3. The cabinet 21 of the wellhead safety control system 2 and the hydraulic safety valve 3 are mounted side by side on the mounting base plate 1, and the flange interfaces 31 on both sides of the hydraulic safety valve 3 are located above the mounting base plate 1. The wellhead safety control system 2 has a remote terminal unit 22 and a hydraulic safety valve module C. The remote terminal unit 22 is electrically connected to the electric actuator 32 of the hydraulic safety valve 3 and can send opening / closing commands to the hydraulic safety valve 3. The hydraulic safety valve module C is used to form a circuit with the quick-release interface 33 of the hydraulic safety valve 3 and the pilot valve of the hydraulic safety valve 3 to control the opening / closing of the hydraulic safety valve 3 and to perform pressure relief protection on the hydraulic safety valve 3. Furthermore, the hydraulic safety valve module C and the two flange interfaces 31 are respectively configured to be connected to the pipeline 4 of the oil and gas wellhead, realizing fully electro-hydraulic automated control of the wellhead control panel of the oil and gas well.

[0038] This invention solves the problems of excessively long connecting pipelines leading to high leakage risk and untimely signal feedback in existing wellhead safety control systems 2 and hydraulic safety valve 3 by integrating the hydraulic safety valve 3 and the wellhead safety control system 2 into a skid-mounted unit. It also solves the disadvantage of high equipment installation, transportation and maintenance costs caused by the separate assembly of the existing wellhead safety control system 2 and hydraulic safety valve 3.

[0039] The wellhead safety control system 2 also has a hydraulic control module A and a pilot control module B. The hydraulic control module A and the pilot control module B work together to control the opening of the hydraulic safety valve 3 and to perform pressure relief protection on the hydraulic safety valve 3.

[0040] Specifically, such as Figure 5 As shown, the hydraulic control module A includes an oil tank a1, a manual pump a2, a first control check valve a3, an electric pump a4, a second control check valve a5, a first control pressure transmitter a6, a first control circuit pressure gauge a7, a control circuit accumulator a8, a control circuit accumulator shut-off valve a9, a control circuit accumulator pressure relief valve a10, a control circuit proportional unloading valve a11, a valve opening indicator a12, a hydraulic three-way valve group a13, a second control pressure transmitter a14, a second control circuit pressure gauge a15, and a level switch a16.

[0041] The pilot control module B includes a pilot valve circuit pressure gauge b1, a fusible plug circuit pressure gauge b2, a fusible plug circuit pressure transmitter b3, a pilot valve circuit relay valve b4, a pilot valve circuit relay valve shielded valve b5, a one-way throttle valve b6, a solenoid valve b7, a solenoid valve shielded valve b8, a manual relay valve b9, a pilot circuit accumulator pressure relief valve b10, a pilot circuit accumulator b11, a pilot circuit accumulator shut-off valve b12, a pilot circuit proportional unloading valve b13, a pilot circuit pressure gauge b14, a pilot circuit pressure regulating valve b15, and a third control check valve b16.

[0042] The hydraulic safety valve module C includes a control circuit shut-off valve c1, a control circuit quick exhaust valve c2, a first transmitter shut-off valve c3, a first transmitter c4, a second transmitter shut-off valve c5, a second transmitter c6, a pilot valve shut-off valve c7, a pilot valve c8, a fusible plug c9, a pilot valve circuit shut-off valve c10, and a fusible plug circuit shut-off valve c11.

[0043] Hydraulic control module A is supplied with hydraulic oil from tank a1. After being pressurized by electric pump a4 or manual pump a2 controlled by first control pressure transmitter a6, the control circuit accumulator shut-off valve a9 is opened. Part of the oil is stored in control circuit accumulator a8, and part is supplied to the downstream hydraulic three-way valve group a13, thereby opening hydraulic safety valve 3. Control circuit proportional unloading valve a11 prevents circuit overload and protects the hydraulic control system. First control circuit pressure gauge a7 displays the pressure value at the front end of the hydraulic control circuit, and second control circuit pressure gauge a15 displays the pressure value at the rear end of the hydraulic control circuit. Second control pressure transmitter a14 is used to transmit the hydraulic control circuit pressure value to the central control system.

[0044] Pilot control module B adjusts the pressure via pilot circuit pressure regulating valve b15, then opens pilot circuit accumulator shut-off valve b12. Part of the energy is stored in pilot circuit accumulator b11, and the remainder is supplied to the pilot control circuit, fusible plug circuit, and high / low pressure circuit. The pilot control circuit uses relatively low-pressure (70-120 psi) hydraulic pressure to control the up-and-down movement of the valve stem of hydraulically controlled three-way valve assembly a13 in hydraulic control module A, thus opening and closing the assembly. The fusible plug circuit is a high-temperature safety protection circuit that utilizes the characteristic of low-melting-point metals melting at high temperatures. When the wellhead temperature rises, the low-melting-point metal melts, releasing pressure and shutting down the hydraulic control system. The high / low pressure circuit detects the oil pipeline pressure. If the oil pipeline pressure is too high or too low, it triggers pilot valve c8 to release pressure, thus shutting down the hydraulic control system. Under normal operation, when it is necessary to remotely close the hydraulic safety valve 3, the central control system sends a signal to the solenoid valve b7. The pilot control pressure is released through the discharge port of the solenoid valve b7, the manual relay valve b9 is closed, and the pilot pressure of the hydraulic three-way valve group a13 is released from the discharge port of the manual relay valve b9, thereby causing the hydraulic three-way valve group a13 in the hydraulic control module A to be activated, thereby closing the hydraulic safety valve 3.

[0045] Hydraulic safety valve module C is supplied with hydraulic pressure from hydraulic control module A via control circuit shut-off valve c1 and control circuit quick-release valve c2 to hydraulic safety valve 3, used to control the opening and closing of hydraulic safety valve 3; first transmitter c4 and second transmitter c6 are used to monitor the pressure on both sides of hydraulic safety valve 3 and transmit the signal to the central control system; fusible plug c9 is used to quickly close hydraulic safety valve 3 in case of fire; pilot valve working circuit monitors the pressure of wellhead production pipeline in real time through pilot valve c8. When the pipeline pressure is abnormal, the relay valve in the pilot valve circuit depressurizes and automatically closes hydraulic safety valve 3.

[0046] Hydraulic control module A, pilot control module B, and hydraulic safety valve module C are integrated into wellhead safety control system 2, which is connected to hydraulic safety valve 3 via instrument tubing and integrated on mounting base plate 1. The control circuit pipelines and electrical pipelines between wellhead safety control system 2 and hydraulic safety valve 3 are all installed in the cable tray 11, with only the flange interfaces 31 on both sides of hydraulic safety valve 3 remaining. After this skid-mounted equipment arrives on site, it can be directly connected to the production pipeline of Christmas tree 5. This simplifies the installation process of wellhead safety control system 2 and hydraulic safety valve 3, reduces the time and length of on-site pipeline connection, and effectively reduces leakage points by retaining only the flange interfaces 31 on both sides of hydraulic safety valve 3, improving the installation efficiency and safety performance of wellhead equipment. It also facilitates remote monitoring personnel to monitor the equipment status in real time and provides detailed operation records for subsequent equipment management and maintenance.

[0047] In some embodiments, the hydraulic safety valve 3 is detachably mounted on the mounting base plate 1 via a clamp.

[0048] As the core actuator of the wellhead safety control system 2, the hydraulic safety valve 3 needs to be regularly calibrated and the seals or springs replaced. The clamp connection structure (usually a half-type or U-type clamp) can lock or loosen the valve body and the base plate by tightening a few bolts. Compared with disassembling multiple flange bolts or cutting welding points, the operation time is reduced by more than 50%, which greatly reduces the labor intensity of maintenance personnel, shortens the wellhead downtime, and improves the production efficiency of oil and gas fields.

[0049] Furthermore, when the wellhead equipment is in long-term operation or affected by external loads (such as thermal expansion and contraction), slight displacement or deformation may occur between the valve body and the base plate. The clamp connection has a certain radial floating margin, which can adapt to small angular deviations and positional offsets, avoiding the installation stress caused by forced alignment in rigid connections. This "flexible" connection method effectively prevents jamming, internal leakage, or damage to the drive mechanism caused by uneven force on the valve body and valve stem, thus improving the long-term operational reliability of the system.

[0050] The hydraulic safety valve 3 is equipped with a first transmitter and a second transmitter. The first transmitter is connected to a flange interface 31 on one side via a first needle valve (the first transmitter shut-off valve is a needle valve). The second transmitter is connected to a flange interface 31 on the other side via a second needle valve (the second transmitter shut-off valve is also a needle valve). The first transmitter and the second transmitter are electrically connected to the remote terminal unit 22 respectively.

[0051] Both the first and second transmitters are pressure transmitters. They are installed on the flange interfaces 31 on both sides of the hydraulic safety valve 3, which allows on-site workers to observe the pressure in the flange interfaces 31 on both sides of the hydraulic safety valve 3 in real time. At the same time, the first and second transmitters can convert the pressure on both sides of the hydraulic safety valve 3 into electrical signals and transmit them to the central control system. When the pressure is abnormal, the central control system can control the relay valve in the pilot valve circuit to release pressure and automatically close the hydraulic safety valve 3.

[0052] The wellhead safety control system 2 and the hydraulic safety valve 3 are connected by hydraulic pipelines and cables, respectively for hydraulic control and electrical signal control of the opening and closing of the hydraulic safety valve 3 and other related valves; the cable wiring and hydraulic pipeline wiring need to be separated to avoid mutual interference.

[0053] Multiple rows of cable trays 11 are provided on the mounting base plate 1 between the cabinet 21 and the hydraulic safety valve 3. The wires connecting the remote terminal unit 22 to the electric actuator 32 of the hydraulic safety valve 3, the first transmitter and the second transmitter are respectively arranged in the cable trays 11.

[0054] The cable tray 11 is long and cylindrical. The cable is housed in the cable tray 11 without being bent or folded excessively. This ensures that the insulation layer of the cable will not be burned through due to heat at the bending points during long-term use. The top surface and sides of the cable tray 11 are provided with a plurality of first heat dissipation holes 111 and a plurality of second heat dissipation holes 112. The plurality of first heat dissipation holes 111 and the plurality of second heat dissipation holes 112 are arranged at intervals along the length of the cable tray 11. This arrangement allows for greater air circulation between the outside air and the internal space of the cable tray 11, thus carrying away all the heat generated by the cable during operation.

[0055] More specifically, the first heat dissipation holes 111 are arranged in one row, and the second heat dissipation holes 112 are arranged in multiple rows. Furthermore, the diameter of the first heat dissipation holes 111 is smaller than the diameter of the second heat dissipation holes 112. This arrangement can prevent dust from the oil and gas well extraction site from falling into the interior of the cable tray 11 from the top surface, thus preventing the cable from contacting the air and affecting the heat dissipation effect of the cable.

[0056] The cable tray 11 is detachably mounted on the mounting base plate 1. The hydraulic safety valve module, the quick-release interface 33, and the pipeline (not shown in the attached figure) connecting the pilot valve of the hydraulic safety valve 3 are arranged side by side and are arranged above the multiple rows of cable trays 11. The hydraulic pipelines and the cable trays 11 do not directly contact each other. This avoids mutual interference between the hydraulic pipelines and the cable trays 11. If the hydraulic pressure is affected, it will cause the central control system to deviate from the control of the hydraulic safety valve 3.

[0057] The cabinet 21 is equipped with a first interface 211, a second interface 212, a third interface 213, a fourth interface 214 and a fifth interface 215 arranged side by side. The first interface 211 is connected to the inflow end of the pilot valve via a first ball valve and a pipeline. The second interface 212 is connected to the outflow end of the pilot valve via a pipeline. The third interface 213 is connected to the inflow end of the quick-drain interface 33 via a second ball valve and a pipeline. The fourth interface 214 is connected to the outflow end of the quick-drain interface 33 via a pipeline. The fifth interface 215 is connected to the pipeline of the oil and gas well via a third ball valve.

[0058] This simplifies the installation process between the wellhead safety control system 2 and the hydraulic safety valve 3. Before moving this skid-mounted equipment to the site, the quick-release interface 33 of the hydraulic safety valve 3 and the pilot valve can be connected to the wellhead safety control system 2 through the above-mentioned interface to reduce the time for connecting pipelines on site.

[0059] Splicing grooves 12 are provided on each of the four sides of the mounting base plate 1. Multiple splicing columns 13 are provided at intervals in the splicing grooves 12 on opposite sides. The arrangement direction of the splicing grooves 12 on opposite sides is consistent with the arrangement direction of the flange interfaces 31 on both sides of the hydraulic safety valve 3. The splicing grooves 12 and splicing columns 13 are configured to splice with external components.

[0060] The mounting base plate 1 serves as a rigid support structure, evenly transferring the weight and vibration load of the hydraulic safety valve 3 to it. Compared to directly suspending the valve body on a thin-walled panel, the spliced ​​base plate design can effectively absorb the mechanical vibration and impact generated during well site operations, prevent joint loosening or valve body displacement caused by long-term vibration, and improve the reliability of the system in harsh environments.

[0061] The distance between the wellhead safety control system 2 and the hydraulic safety valve 3 is 0.8m-1.2m.

[0062] The core function of the hydraulic safety valve 3 is to close quickly after an ESD (emergency shutdown) signal is triggered (standard requirements typically require ≤3 seconds). The propagation speed of the hydraulic signal in the pipeline is affected by fluid viscosity, pipe resistance, and pipeline length. By controlling the distance between the wellhead safety control system 2 and the hydraulic safety valve 3 to within 1.2 meters, the transmission delay of the hydraulic control signal from the control unit to the valve actuator is greatly shortened. This distance setting can reduce the total system response time by more than 30%, ensuring that the valve can quickly shut off the valve in the early stages of a fire or leak, effectively preventing the accident from escalating.

[0063] 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 skid-mounted device for a wellhead safety control system, characterized in that, It includes a mounting base plate, a wellhead safety control system, and a hydraulic safety valve. The cabinet of the wellhead safety control system and the hydraulic safety valve are mounted side by side on the mounting base plate, and the flange interfaces on both sides of the hydraulic safety valve are located above the mounting base plate. The wellhead safety control system includes a remote terminal unit and a hydraulically controlled safety valve module; The remote terminal unit is electrically connected to the electric actuator of the hydraulic safety valve; The hydraulically controlled safety valve module is used to form a circuit with the quick-release interface of the hydraulically operated safety valve and the pilot valve of the hydraulically operated safety valve; Furthermore, the hydraulic safety valve module and the two flange interfaces are respectively configured to be connected to the pipeline at the oil and gas wellhead.

2. The skid-mounted equipment for the wellhead safety control system according to claim 1, characterized in that, The hydraulic safety valve is equipped with a first transmitter and a second transmitter. The first transmitter is connected to the flange interface on one side via a first needle valve, and the second transmitter is connected to the flange interface on the other side via a second needle valve. Furthermore, the first transmitter and the second transmitter are electrically connected to the remote terminal unit.

3. The skid-mounted equipment for the wellhead safety control system according to claim 2, characterized in that, Multiple rows of cable trays are provided on the mounting base plate between the cabinet and the hydraulic safety valve. The wires connecting the remote terminal unit to the electric actuator of the hydraulic safety valve, the first transmitter, and the second transmitter are respectively arranged in the cable trays.

4. The skid-mounted equipment for the wellhead safety control system according to claim 3, characterized in that, The wire groove is long and cylindrical, and the top and side surfaces of the wire groove are respectively provided with a plurality of first heat dissipation holes and a plurality of second heat dissipation holes. The plurality of first heat dissipation holes and the plurality of second heat dissipation holes are arranged at intervals along the length of the wire groove. The first heat dissipation holes are arranged in one row, and the second heat dissipation holes are arranged in multiple rows. Furthermore, the diameter of the first heat dissipation holes is smaller than the diameter of the second heat dissipation holes.

5. The skid-mounted equipment for the wellhead safety control system according to claim 3, characterized in that, The hydraulic safety valve module, the quick-release interface, and the pipeline connecting the pilot valve of the hydraulic safety valve are arranged side by side and are positioned above the multiple rows of cable trays.

6. The skid-mounted equipment for the wellhead safety control system according to claim 5, characterized in that, The cabinet is provided with a first interface, a second interface, a third interface, a fourth interface, and a fifth interface arranged side by side. The first interface is connected to the inflow end of the pilot valve via a first ball valve and a pipe. The second interface is connected to the outflow end of the pilot valve via a pipe. The third interface is connected to the inflow end of the quick-drain interface via a second ball valve and a pipe. The fourth interface is connected to the outflow end of the quick-drain interface via a pipe. The fifth interface is connected to the pipeline of the oil and gas well via a third ball valve.

7. The skid-mounted equipment for the wellhead safety control system according to claim 1, characterized in that, The mounting base plate is provided with splicing grooves on each of its four sides, and multiple splicing columns are provided at intervals in the splicing grooves on opposite sides. The arrangement direction of the splicing grooves on opposite sides is consistent with the arrangement direction of the flange interfaces on both sides of the hydraulic safety valve. The splicing groove and the splicing column are configured to be spliced ​​with external components.

8. The skid-mounted equipment for the wellhead safety control system according to claim 1, characterized in that, The distance between the wellhead safety control system and the hydraulic safety valve is 0.8m-1.2m.

9. The skid-mounted equipment for the wellhead safety control system according to claim 1, characterized in that, The hydraulic safety valve is detachably mounted on the mounting base plate via a clamp.

10. The skid-mounted equipment for the wellhead safety control system according to claim 1, characterized in that, The wellhead safety control system also includes a hydraulic control module and a pilot control module. The hydraulic control module and the pilot control module work together to control the opening of the hydraulic safety valve and to perform pressure relief protection on the hydraulic safety valve.

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