175MPa gas production wellhead device

Abstract

The invention belongs to the technical field of gas production wellhead devices, and particularly relates to a 175MPa gas production wellhead device which comprises a gas production tree assembly and a tubing head assembly, the gas production tree assembly comprises a gate valve body, the gate valve body comprises a driver and a hand lever, and a protection assembly is installed between the driver and the hand lever; the protection assembly comprises a connecting shaft, a hand lever, a driver, a transmission sleeve, a steel rope, a high-strength spring, a transmission ring, a connecting block, a rotating groove and a transmission column. When the driver operates, the driver drives the connecting shaft to rotate, the connecting shaft rotates to drive the transmission column on the transmission ring to rotate synchronously, after the transmission column is in contact with the steel rope, the connecting shaft drives the steel rope to twist through the transmission column, and at the moment, the transmission sleeve moves towards the direction of the connecting shaft, so that the transmission sleeve is separated from the hand lever; and the phenomenon that the valve cannot be normally opened due to physical interference between the hand lever and the output shaft of the driver caused by mistaken rotation of the hand lever in the operation process of the driver is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of gas production wellhead devices, and specifically relates to a 175MPa gas production wellhead device. Background Art

[0002] 175MPa ultra-high pressure gas wellhead device is a key technical equipment used in the oil and gas industry, especially in the exploitation of deep and ultra-deep oil and gas resources. 175MPa ultra-high pressure gas wellhead device mainly includes gas tree and oil pipe. The gas tree is the core part, with a flange at the bottom, connected to other parts through bolt holes.

[0003] The valve body of the combination valve on the existing gas production tree usually adopts an integral design, which combines the traditional four-piece gate valve body together, can control three-way outlets and is equipped with an electric actuator, which can achieve precise and convenient operation while reducing potential leakage points. In order to improve the safety of the combination valve, a hand lever is installed on the valve body to ensure that in the event of failure of the hydraulic safety valve, the combination valve can be manually operated to ensure the final closure of the gas production wellhead device to prevent the occurrence of well control accidents. The electric drive is an automated device used to control the opening and closing of the valve. It converts electrical energy into mechanical energy through a motor and a gear mechanism to drive the rotation of the valve. However, if the hand lever is turned by mistake while the electric drive is running, it will cause physical interference between the hand lever and the output shaft of the electric drive, resulting in the inability to rotate the valve normally, and may even damage the hand lever or the output part of the electric drive. Summary of the invention

[0004] The purpose of the present invention is to provide a 175MPa gas production wellhead device to solve the technical problems in the prior art in view of the shortcomings of the prior art.

[0005] The object of the present invention can be achieved by the following technical solutions: A 175MPa gas production wellhead device, which includes a gas tree assembly and a tubing head assembly, the gas tree assembly includes an upper combination valve, the upper combination valve is connected to the tubing head assembly through a lower combination valve, and the upper combination valve is connected to a hydraulic safety valve through a conversion joint;

[0006] The upper combination valve is provided with a gate valve body, the gate valve body includes a driver and a hand lever, and a protection component is provided between the driver and the hand lever;

[0007] The protection component includes a box body, a connecting shaft and a hand lever are rotatably installed inside the box body, the connecting shaft is connected to the driver, the connecting shaft and the hand lever are connected through a transmission sleeve, the box body is connected to the transmission sleeve through a steel rope and a high-strength spring, a transmission ring is rotatably installed on the connecting shaft, a connecting block is installed on the inner side of the transmission ring, a rotating groove is provided on the connecting shaft, the connecting block is connected to the inner wall of the rotating groove through an arc spring, a transmission column is installed on the outer side of the transmission ring, and the transmission column abuts the steel rope.

[0008] As a further optimization or improvement of this solution, transmission bar 1 is installed on one end of the connecting shaft close to the transmission sleeve, transmission bar 2 is installed on the hand lever, a transmission groove is opened inside the transmission sleeve, and transmission bar 1 and transmission bar 2 are respectively inserted into the transmission groove.

[0009] As a further optimization or improvement of this solution, a pressure boosting assembly is installed inside the box body, and the pressure boosting assembly includes an oil pressure box and an installation box. A one-way flow gate is installed inside the oil pressure box, and the one-way flow gate separates the oil pressure box into a pressure oil chamber and a high oil pressure chamber, and a pressure plate is installed in the pressure oil chamber;

[0010] The pressure supply box is installed on both sides of the installation box, a large gear is coaxially connected to the hand lever, a small gear is installed in the pressure supply box, the large gear is meshed with the small gear, an oil storage tank is installed at the bottom of the pressure supply box, the high oil pressure chamber is connected to one side of the pressure supply box through an oil delivery pipe, an oil drain pipe is installed on the other side of the pressure supply box, the oil drain pipe is connected to the oil storage tank, and the oil storage tank is connected to the oil pressure chamber through an oil delivery pipe;

[0011] When the transmission sleeve moves, the transmission sleeve drives the pressure plate to squeeze the hydraulic oil inside the oil pressure chamber.

[0012] As a further optimization or improvement of this solution, a fixing rod is installed on the inner wall of the box body, a transmission gear is installed on the fixing rod, a lower rack is installed on the transmission sleeve, and an upper rack is installed on the pressure plate, and the lower rack and the upper rack are respectively meshed with teeth on both sides of the transmission gear.

[0013] As a further optimization or improvement of this solution, a ratchet is installed on the pinion, a cover is installed on the infusion port on the oil drain pipe, a ratchet is rotatably installed on the side of the pressure supply box close to the oil drain pipe, the ratchet is connected to the cover, and a reset spring is installed between the ratchet and the inner wall of the pressure supply box.

[0014] As a further optimization or improvement of the present solution, the gate valve body also includes a valve body and a lower valve cover and an upper valve cover located on both sides thereof, the lower valve cover is installed on the lower valve cover, the lower valve stem is installed inside the lower valve cover, the upper valve stem is installed inside the upper valve cover, a bracket is installed on the upper valve cover close to one end of the driver, the upper valve stem passes through the bracket and is connected to the driver, a valve plate is installed between the lower valve stem and the upper valve stem, a valve seat is installed inside the valve body, the valve plate cooperates with the valve seat, and grease injection valves are installed on both the lower valve cover and the upper valve cover.

[0015] As a further optimization or improvement of this solution, the tubing head assembly includes a tubing head body and a grease injection port installed thereon, a tubing hanger is installed inside the tubing head body, both sides of the tubing head body are connected to the square straight-through stop valve and the electric gate valve through manual gate valves, and a pressure gauge is installed on the square straight-through stop valve.

[0016] As a further optimization or improvement of this solution, an instrument connection flange and a pressure gauge are installed between the conversion joint and the hydraulic safety valve, and an instrument flange is installed on the hydraulic safety valve.

[0017] Beneficial effects of the present invention:

[0018] (1) When the driver is running, the driver will drive the valve plate to move to realize the switch valve operation. At the same time, the operation of the driver will drive the connecting shaft to rotate, and the rotation of the connecting shaft will drive the transmission column on the transmission ring to rotate synchronously. When the transmission column contacts the steel rope, the connecting shaft presses the arc spring on one side of the connecting block. When the arc spring is pressed to the limit, as the connecting shaft rotates, the connecting shaft drives the steel rope to twist through the transmission column, and the high-strength spring is compressed. At this time, the transmission sleeve moves toward the connecting shaft, so that the transmission sleeve is separated from the hand lever. At this time, the connecting shaft is separated from the hand lever; therefore, when the driver in the present invention is in operation, the driver drives the transmission sleeve to separate from the hand lever through the transmission column and the steel rope, so as to avoid the hand lever being rotated by mistake during the operation of the driver, resulting in physical interference between the hand lever and the output shaft of the driver, causing the valve to fail to open normally.

[0019] (2) When the driver fails or fails, the operator urgently turns the hand lever, which will drive the large gear and the small gear to rotate. The rotation of the small gear will drive the ratchet to rotate synchronously. During the rotation of the ratchet, the teeth on the ratchet will abut against the ratchet, so that the ratchet drives the ratchet and the cover on it to rotate simultaneously, so that the cover is separated from the oil drain pipe. At this time, the oil drain pipe is opened. At the same time, the hydraulic oil inside the high oil pressure chamber is injected into the pressure supply box through the oil pipe and the oil spray head. During this process, the hydraulic oil drives the small gear to rotate, so that the hydraulic oil provides assistance to the hand lever through the small gear, reducing the heavy feeling when the hand lever is turned, making the emergency operation of turning the hand lever to close the gate valve body easier, thereby ensuring that the operator can close the gate valve body in time and avoiding the situation where the closing time of the gate valve body is increased due to the large resistance of the hand lever rotation, thereby causing gas leakage.

[0020] (3) Every time the teeth on the ratchet pass and turn the ratchet, the ratchet will drive the cover to move and open the oil drain pipe. However, after the teeth pass the ratchet, the reset spring will immediately drive the ratchet to rebound and close the oil drain pipe. When the next tooth of the ratchet passes the ratchet, the oil drain pipe will open again, thereby ensuring the precise output of the hydraulic oil and enabling the hydraulic oil to evenly assist the hand lever. This ensures that as long as the hand lever is turned, the hydraulic oil will assist the hand lever through the pinion. When the hand lever stops turning, the hydraulic oil stops being supplied, reducing the waste of hydraulic oil circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the upper combination valve structure.

[0024] Figure 3This is a schematic diagram of the gate valve body structure.

[0025] Figure 4 This is a schematic diagram of the overall structure of the protection component.

[0026] Figure 5 To protect the overall structural section of the component.

[0027] Figure 6 Exploded view to protect the overall structure of the component.

[0028] Figure 7 This is an exploded diagram of the connecting shaft and transmission ring structure.

[0029] Figure 8 It is a schematic diagram of the connection between the connecting shaft and the transmission ring.

[0030] Fig. 9 for Figure 5 A magnified view of the structure of part A.

[0031] Fig.10 It is a schematic diagram of the connection between the oil pressure box and the pressure supply box.

[0032] Fig.11 It is the front view of the connection structure between the oil pressure box and the pressure supply box.

[0033] Fig.12 for Fig.11 A magnified view of the structure of part B.

[0034] Fig.13 Schematic diagram of ratchet structure.

[0035] Fig.14 for Fig.13 A magnified view of the C site structure.

[0036] The following are marked in the figure: 1. Christmas tree assembly; 101. Lower combination valve; 102. Upper combination valve; 103. Conversion joint; 104. Instrument connection flange; 105. Pressure gauge; 106. Hydraulic safety valve; 107. Instrument flange; 2. Tubing head assembly; 201. Electric gate valve; 202. Tubing hanger; 203. Manual gate valve; 204. Square straight stop valve; 205. Pressure gauge; 206. Hydraulic safety valve; 107. Instrument flange; 2. Tubing head assembly; 201. Electric gate valve; 202. Tubing hanger; 203. Manual gate valve; 204. Square straight stop valve; 205. Pressure gauge; 207. 6. Tubing head body; 207. Grease injection port; 3. Gate valve body; 301. Lower valve cover; 302. Lower valve cover; 303. Lower valve stem; 304. Grease injection valve; 305. Valve plate; 306. Valve seat; 307. Bracket; 308. Upper valve stem; 309. Driver; 310. Hand lever; 311. Valve body; 312. Upper valve cover; 4. Protection assembly; 401. Box; 402. Connecting shaft; 40 3. Transmission ring; 404. Transmission column; 405. Connecting block; 406. Rotation groove; 407. Arc spring; 408. Transmission bar 1; 409. Steel rope; 410. Transmission sleeve; 411. Transmission groove; 412. High-strength spring; 413. Transmission bar 2; 5. Pressure booster assembly; 501. Fixed rod; 502. Transmission gear; 503. Lower rack; 504. Upper rack; 505. Press plate ; 506, oil pressure chamber; 507, high oil pressure chamber; 508, one-way flow gate; 509, oil pressure box; 510, oil delivery pipe; 511, oil delivery pipe; 512, installation box; 513, large gear; 514, small gear; 515, pressure supply box; 516, oil storage tank; 517, oil drain pipe; 518, oil injection head; 519, ratchet; 520, cover; 521, ratchet; 522, return spring. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1-Figure 8 A 175MPa gas production wellhead device, comprising a gas tree assembly 1 and a tubing head assembly 2, wherein the gas tree assembly 1 comprises an upper combination valve 102, the upper combination valve 102 is connected to the tubing head assembly 2 via a lower combination valve 101, and the upper combination valve 102 is connected to a hydraulic safety valve 106 via a conversion joint 103;

[0039] The upper combination valve 102 is provided with a gate valve body 3, the gate valve body 3 includes a driver 309 and a hand lever 310, and a protection component 4 is provided between the driver 309 and the hand lever 310;

[0040] The protection component 4 includes a box body 401, a connecting shaft 402 and a hand lever 310 are rotatably installed inside the box body 401, the connecting shaft 402 is connected to the driver 309, the connecting shaft 402 and the hand lever 310 are connected through a transmission sleeve 410, the box body 401 is connected to the transmission sleeve 410 through a steel rope 409 and a high-strength spring 412, a transmission ring 403 is rotatably installed on the connecting shaft 402, a connecting block 405 is installed on the inner side of the transmission ring 403, a rotating groove 406 is provided on the connecting shaft 402, the connecting block 405 is connected to the inner wall of the rotating groove 406 through an arc spring 407, a transmission column 404 is installed on the outer side of the transmission ring 403, and the transmission column 404 abuts against the steel rope 409.

[0041] Specifically, a transmission bar 1 408 is installed on one end of the connecting shaft 402 close to the transmission sleeve 410, and a transmission bar 2 413 is installed on the hand lever 310. A transmission groove 411 is opened inside the transmission sleeve 410, and the transmission bar 1 408 and the transmission bar 2 413 are respectively inserted into the transmission groove 411.

[0042] In the initial state, that is, the driver 309 is not in operation, such as Figure 5 As shown, the transmission sleeve 410 is connected to the connecting shaft 402 and the hand lever 310 .

[0043] When the driver 309 is running, the driver 309 will drive the valve plate 305 to move to realize the switch valve operation. At the same time, the operation of the driver 309 will drive the connecting shaft 402 to rotate, and the rotation of the connecting shaft 402 will drive the transmission column 404 on the transmission ring 403 to rotate synchronously. When the transmission column 404 contacts the steel rope 409, the connecting shaft 402 presses the arc spring 407 on one side of the connecting block 405. When the arc spring 407 is pressed to the limit, as the connecting shaft 402 rotates, the connecting shaft 402 drives the steel rope 409 to twist through the transmission column 404. , the high-strength spring 412 is compressed, and the transmission sleeve 410 moves toward the connecting shaft 402, so that the transmission sleeve 410 is separated from the hand lever 310, and the connecting shaft 402 is separated from the hand lever 310; therefore, when the driver 309 of the present invention is in operation, the driver 309 drives the transmission sleeve 410 to separate from the hand lever 310 through the transmission column 404 and the steel rope 409, so as to avoid the hand lever 310 being turned by mistake during the operation of the driver 309, resulting in physical interference between the hand lever 310 and the output shaft of the driver 309, causing the valve to fail to open normally;

[0044] When the driver 309 is closed, the connecting shaft 402 stops rotating. At this time, the compressed arc spring 407 rebounds to drive the transmission ring 403 and the transmission column 404 thereon to rotate, so that the transmission column 404 is freed from the twisting of the steel rope 409. At this time, under the action of the high-strength spring 412, the transmission sleeve 410 gradually slides along the transmission bar 408 on the connecting shaft 402 and resets.

[0045] It should be noted that the number of steel ropes 409 and transmission columns 404 to be installed can be based on the moving distance of the transmission sleeve 410 .

[0046] See also Figure 9-14 The box body 401 is internally installed with a pressure boosting assembly 5, which includes an oil pressure box 509 and an installation box 512. A one-way flow gate 508 is installed inside the oil pressure box 509. The one-way flow gate 508 divides the oil pressure box 509 into a pressure oil chamber 506 and a high oil pressure chamber 507. A pressure plate 505 is installed in the pressure oil chamber 506.

[0047] The pressure supply box 515 is installed on both sides of the installation box 512, the large gear 513 is coaxially connected to the hand lever 310, the small gear 514 is installed in the pressure supply box 515, the large gear 513 is meshed with the small gear 514, the oil storage tank 516 is installed at the bottom of the pressure supply box 515, the high oil pressure chamber 507 is connected to one side of the pressure supply box 515 through the oil delivery pipe 511, the oil discharge pipe 517 is installed on the other side of the pressure supply box 515, the oil discharge pipe 517 is connected to the oil storage tank 516, and the oil storage tank 516 is connected to the oil pressure chamber 506 through the oil delivery pipe 510;

[0048] When the transmission sleeve 410 moves, the transmission sleeve 410 drives the pressure plate 505 to squeeze the hydraulic oil in the oil pressure chamber 506 .

[0049] Specifically, a fixing rod 501 is installed on the inner wall of the box body 401, a transmission gear 502 is installed on the fixing rod 501, a lower rack 503 is installed on the transmission sleeve 410, and an upper rack 504 is installed on the pressure plate 505. The lower rack 503 and the upper rack 504 are respectively meshed with teeth on both sides of the transmission gear 502.

[0050] Specifically, a ratchet 519 is installed on the pinion 514, a cover 520 is installed on the infusion port of the oil drain pipe 517, a ratchet 521 is rotatably installed on one side of the pressure supply box 515 close to the oil drain pipe 517, the ratchet 521 is connected to the cover 520, and a reset spring 522 is installed between the ratchet 521 and the inner wall of the pressure supply box 515.

[0051] It should be noted that a stop valve is installed on the oil delivery pipe 510. When the driver 309 is running, the connecting shaft 402 rotates, and the stop valve is closed. When the driver 309 is closed, the stop valve is opened. Fig.14 In the initial state, the cover 520 is in a state of blocking the oil drain pipe 517. The oil injection head 518 is installed on the oil delivery pipe 511, and the oil injection head 518 injects the hydraulic oil in the oil delivery pipe 511 into the pressure supply box 515.

[0052] It should be noted that when the driver 309 fails or fails, it is necessary to urgently manually turn the hand lever 310 to close the gate valve body 3. However, the gas pressure collected at the wellhead in the present invention is 175MPa. Therefore, the resistance to turning the hand lever 310 to close the gate valve body 3 is relatively large, and the time to close the gate valve body 3 will increase accordingly, which is very likely to cause accidents such as gas leakage.

[0053] When the connecting shaft 402 rotates, the connecting shaft 402 drives the transmission sleeve 410 to separate from the hand lever 310 through the transmission ring 403 and the steel rope 409. Fig. 9 As shown, the movement of the transmission sleeve 410 will drive the lower rack 503 to move synchronously. Since the lower rack 503 is connected to the upper rack 504 through the transmission gear 502, and the liquid stop valve on the oil supply pipe 510 is closed, the movement of the lower rack 503 drives the pressure plate 505 to compress the hydraulic oil inside the oil pressure box 509, so that the hydraulic oil enters the high oil pressure chamber 507 through the one-way flow gate 508 and is compressed. The hydraulic oil inside the high oil pressure chamber 507 is input into the pressure supply box 515 through the oil delivery pipe 511. Since the oil discharge pipe 517 is in a blocked state, the oil pressure of the hydraulic oil inside the pressure supply box 515 is balanced; when the steel rope 409 is closed, the transmission sleeve 410 drives the pressure plate 505 to reset. At the same time, the transmission sleeve 410 connects the steel rope 409 and the hand lever 310.

[0054] When the driver 309 fails or fails, the operator turns the handle 310 urgently. Figure 11-Figure 14 When the hand lever 310 rotates, the hand lever 310 drives the large gear 513 and the small gear 514 to rotate, and the rotation of the small gear 514 drives the ratchet 519 to rotate synchronously. During the rotation of the ratchet 519, the teeth on the ratchet 519 abut against the ratchet teeth 521, so that the ratchet 519 drives the ratchet teeth 521 and the cover 520 thereon to rotate simultaneously, so that the cover 520 is separated from the oil drain pipe 517. At this time, the oil drain pipe 517 is opened. At the same time, the hydraulic oil in the high oil pressure chamber 507 is injected into the pressure supply box 515 through the oil delivery pipe 511 and the oil injection head 518. See Fig.12 In the process of the hand lever 310 driving the large gear 513 and the small gear 514 to rotate, the hydraulic oil flows to the oil drain pipe 517 through the oil spray head 518, and the hydraulic oil flowing into the oil drain pipe 517 is collected in the oil storage tank 516. In this process, the hydraulic oil pushes the small gear 514 to rotate, so that the hydraulic oil provides assistance to the hand lever 310 through the small gear 514, reducing the heaviness of the hand lever 310 when turning, making the emergency operation of turning the hand lever 310 to close the gate valve body 3 easier, thereby ensuring that the operator can close the gate valve body 3 in time, avoiding the situation where the closing time of the gate valve body 3 is increased due to the large rotation resistance of the hand lever 310, thereby causing gas leakage.

[0055] Every time the teeth on the ratchet 519 pass through and turn the ratchet 521, the ratchet 521 will drive the cover 520 to move, so that the oil drain pipe 517 is opened. However, after the teeth pass through the ratchet 521, the return spring 522 will immediately drive the ratchet 521 to rebound and close the oil drain pipe 517. When the next tooth of the ratchet 521 passes through the ratchet 521, the oil drain pipe 517 will open again, thereby ensuring the precise output of the hydraulic oil, so that the hydraulic oil can evenly assist the hand lever 310, and ensuring that as long as the hand lever 310 is turned, the hydraulic oil will assist the hand lever 310 through the pinion 514. When the hand lever 310 stops rotating, the hydraulic oil stops being supplied, thereby reducing the waste of hydraulic oil circulation.

[0056] See also Figure 3 The gate valve body 3 also includes a valve body 311 and a lower valve cover 302 and an upper valve cover 312 located on both sides thereof, a lower valve cover 301 is installed on the lower valve cover 302, a lower valve stem 303 is installed inside the lower valve cover 302, an upper valve stem 308 is installed inside the upper valve cover 312, a bracket 307 is installed at one end of the upper valve cover 312 close to the driver 309, the upper valve stem 308 penetrates the bracket 307 and is connected to the driver 309, a valve plate 305 is installed between the lower valve stem 303 and the upper valve stem 308, a valve seat 306 is installed inside the valve body 311, the valve plate 305 cooperates with the valve seat 306, and grease injection valves 304 are installed on both the lower valve cover 302 and the upper valve cover 312.

[0057] It should be noted that when the driver 309 is running, the driver 309 drives the upper valve stem 308 and the valve plate 305 to move, thereby ensuring that the gate valve body 3 is closed. The main pressure-bearing parts such as the valve body 311 and the valve plate 305 are made of high-strength fixed alloy materials, which can withstand an ultra-high rated working pressure of 175MPa, can meet the high-pressure environment of deep gas reservoirs, ensure the stable operation of the wellhead device in a harsh mining environment, and realize safe and efficient mining of natural gas.

[0058] See also Figure 1 The tubing head assembly 2 includes a tubing head body 206 and a grease injection port 207 installed thereon. A tubing hanger 202 is installed inside the tubing head body 206. Both sides of the tubing head body 206 are connected to a square straight-through stop valve 204 and an electric gate valve 201 through a manual gate valve 203, and a pressure gauge 205 is installed on the square straight-through stop valve 204.

[0059] Specifically, an instrument connection flange 104 and a pressure gauge 105 are installed between the conversion joint 103 and the hydraulic safety valve 106 , and an instrument flange 107 is installed on the hydraulic safety valve 106 .

[0060] It should be noted that the instrument connection flange 104 and the pressure gauge 105 are installed on the gas tree assembly 1, and the square straight-through stop valve 204 and the pressure gauge 205 are installed on the tubing head assembly 2. The gas wellhead device can be switched on and off remotely in real time according to the working conditions to ensure the safety and reliability of the mining process.

[0061] The upper and lower parts of the tubing hanger 202 adopt a multi-stage sealing structure, including a combination of metal seals and elastic seals, which effectively improves the sealing performance of the device and prevents natural gas leakage.

[0062] The implementation principle of the present invention is:

[0063] When in use, the driver 309 drives the valve plate 305 to move to realize the switch valve operation. At the same time, the operation of the driver 309 will drive the connecting shaft 402 to rotate, and the rotation of the connecting shaft 402 will drive the transmission column 404 on the transmission ring 403 to rotate synchronously. When the transmission column 404 contacts the steel rope 409, the connecting shaft 402 presses the arc spring 407 on one side of the connecting block 405. When the arc spring 407 is pressed to the limit, as the connecting shaft 402 rotates, the connecting shaft 402 drives the steel rope 409 to twist through the transmission column 404. High strength The spring 412 is compressed, and the transmission sleeve 410 moves toward the connecting shaft 402, so that the transmission sleeve 410 is separated from the hand lever 310. At this time, the connecting shaft 402 is separated from the hand lever 310. Therefore, when the driver 309 of the present invention is in operation, the driver 309 drives the transmission sleeve 410 to separate from the hand lever 310 through the transmission column 404 and the steel rope 409, so as to avoid the hand lever 310 being turned by mistake during the operation of the driver 309, resulting in physical interference between the hand lever 310 and the output shaft of the driver 309, causing the valve to fail to open normally.

[0064] When the driver 309 is closed, the connecting shaft 402 stops rotating. At this time, the compressed arc spring 407 rebounds to drive the transmission ring 403 and the transmission column 404 thereon to rotate, so that the transmission column 404 is freed from the twisting of the steel rope 409. At this time, under the action of the high-strength spring 412, the transmission sleeve 410 gradually slides along the transmission bar 408 on the connecting shaft 402 and resets.

[0065] When the connecting shaft 402 rotates, the connecting shaft 402 drives the transmission sleeve 410 to separate from the hand lever 310 through the transmission ring 403 and the steel rope 409. Fig. 9As shown, the movement of the transmission sleeve 410 will drive the lower rack 503 to move synchronously. Since the lower rack 503 is connected to the upper rack 504 through the transmission gear 502, and the liquid stop valve on the oil supply pipe 510 is closed, the movement of the lower rack 503 drives the pressure plate 505 to compress the hydraulic oil inside the oil pressure box 509, so that the hydraulic oil enters the high oil pressure chamber 507 through the one-way flow gate 508 and is compressed. The hydraulic oil inside the high oil pressure chamber 507 is input into the pressure supply box 515 through the oil delivery pipe 511. Since the oil discharge pipe 517 is in a blocked state, the oil pressure of the hydraulic oil inside the pressure supply box 515 is balanced; when the steel rope 409 is closed, the transmission sleeve 410 drives the pressure plate 505 to reset. At the same time, the transmission sleeve 410 connects the steel rope 409 and the hand lever 310.

[0066] When the driver 309 fails or fails, the operator turns the handle 310 urgently. Figure 11-Figure 14 When the hand lever 310 rotates, the hand lever 310 drives the large gear 513 and the small gear 514 to rotate, and the rotation of the small gear 514 drives the ratchet 519 to rotate synchronously. During the rotation of the ratchet 519, the teeth on the ratchet 519 abut against the ratchet teeth 521, so that the ratchet 519 drives the ratchet teeth 521 and the cover 520 thereon to rotate simultaneously, so that the cover 520 is separated from the oil drain pipe 517. At this time, the oil drain pipe 517 is opened. At the same time, the hydraulic oil in the high oil pressure chamber 507 is injected into the pressure supply box 515 through the oil delivery pipe 511 and the oil injection head 518. See Fig.12 In the process of the hand lever 310 driving the large gear 513 and the small gear 514 to rotate, the hydraulic oil flows to the oil drain pipe 517 through the oil spray head 518, and the hydraulic oil flowing into the oil drain pipe 517 is collected in the oil storage tank 516. The hydraulic oil inside the oil storage tank 516 will finally be reset and sucked into the oil pressure chamber 506 through the pressure plate 505 to ensure that the hydraulic oil can be recycled. In this process, the hydraulic oil pushes the small gear 514 to rotate, so that the hydraulic oil provides assistance to the hand lever 310 through the small gear 514, reducing the heavy feeling of the hand lever 310 when turning, making the emergency operation of turning the hand lever 310 to close the gate valve body 3 easier, thereby ensuring that the operator can close the gate valve body 3 in time, avoiding the situation where the closing time of the gate valve body 3 is increased due to the large rotation resistance of the hand lever 310, thereby causing gas leakage.

[0067] Every time the teeth on the ratchet 519 pass through and turn the ratchet 521, the ratchet 521 will drive the cover 520 to move, so that the oil drain pipe 517 is opened. However, after the teeth pass through the ratchet 521, the return spring 522 will immediately drive the ratchet 521 to rebound and close the oil drain pipe 517. When the next tooth of the ratchet 521 passes through the ratchet 521, the oil drain pipe 517 will open again, thereby ensuring the precise output of the hydraulic oil, so that the hydraulic oil can evenly assist the hand lever 310, and ensuring that as long as the hand lever 310 is turned, the hydraulic oil will assist the hand lever 310 through the pinion 514. When the hand lever 310 stops rotating, the hydraulic oil stops being supplied, thereby reducing the waste of hydraulic oil circulation.

[0068] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A 175MPa gas production wellhead device, characterized by: The gas tree assembly (1) comprises a gas tree assembly (1) and a tubing head assembly (2). The gas tree assembly (1) comprises an upper combination valve (102). The upper combination valve (102) is connected to the tubing head assembly (2) via a lower combination valve (101). The upper combination valve (102) is connected to a hydraulic safety valve (106) via a conversion joint (103). A gate valve body (3) is installed on the upper combination valve (102), the gate valve body (3) comprises a driver (309) and a hand lever (310), and a protection component (4) is installed between the driver (309) and the hand lever (310); The protection component (4) comprises a box body (401), a connecting shaft (402) and a hand lever (310) are rotatably mounted inside the box body (401), the connecting shaft (402) is connected to a driver (309), the connecting shaft (402) and the hand lever (310) are connected via a transmission sleeve (410), the box body (401) is connected to the transmission sleeve (410) via a steel rope (409) and a high-strength spring (412), a transmission ring (403) is rotatably mounted on the connecting shaft (402), a connecting block (405) is mounted inside the transmission ring (403), a rotation groove (406) is provided on the connecting shaft (402), the connecting block (405) is connected to the inner wall of the rotation groove (406) via an arc spring (407), a transmission column (404) is mounted outside the transmission ring (403), and the transmission column (404) abuts against the steel rope (409).

2. A 175MPa gas production wellhead device according to claim 1, characterized in that: A transmission bar 1 (408) is installed at one end of the connecting shaft (402) close to the transmission sleeve (410), and a transmission bar 2 (413) is installed on the hand lever (310). A transmission groove (411) is provided inside the transmission sleeve (410), and the transmission bar 1 (408) and the transmission bar 2 (413) are respectively inserted into the transmission grooves (411).

3. A 175MPa gas production wellhead device according to claim 1, characterized in that: A pressure boosting assembly (5) is installed inside the box body (401), and the pressure boosting assembly (5) includes an oil pressure box (509) and an installation box (512). A one-way flow gate (508) is installed inside the oil pressure box (509), and the one-way flow gate (508) divides the oil pressure box (509) into a pressure oil chamber (506) and a high oil pressure chamber (507). A pressure plate (505) is installed inside the pressure oil chamber (506); A pressure supply box (515) is installed on both sides of the installation box (512), a large gear (513) is coaxially connected to the hand lever (310), a small gear (514) is installed in the pressure supply box (515), the large gear (513) is meshed with the small gear (514), an oil storage tank (516) is installed at the bottom of the pressure supply box (515), the high oil pressure chamber (507) is connected to one side of the pressure supply box (515) through an oil delivery pipe (511), an oil discharge pipe (517) is installed on the other side of the pressure supply box (515), the oil discharge pipe (517) is connected to the oil storage tank (516), and the oil storage tank (516) is connected to the oil pressure chamber (506) through an oil delivery pipe (510); When the transmission sleeve (410) moves, the transmission sleeve (410) drives the pressure plate (505) to squeeze the hydraulic oil inside the oil pressure chamber (506).

4. A 175MPa gas production wellhead device according to claim 3, characterized in that: A fixing rod (501) is installed on the inner wall of the box body (401), a transmission gear (502) is installed on the fixing rod (501), a lower rack (503) is installed on the transmission sleeve (410), an upper rack (504) is installed on the pressing plate (505), and the lower rack (503) and the upper rack (504) are respectively meshed with teeth on both sides of the transmission gear (502).

5. A 175MPa gas production wellhead device according to claim 4, characterized in that: A ratchet (519) is installed on the pinion gear (514), a sealing cover (520) is installed on the infusion port of the oil discharge pipe (517), a ratchet (521) is rotatably installed on a side of the pressure supply box (515) close to the oil discharge pipe (517), the ratchet (521) is connected to the sealing cover (520), and a return spring (522) is installed between the ratchet (521) and the inner wall of the pressure supply box (515).

6. A 175MPa gas production wellhead device according to claim 1, characterized in that: The gate valve body (3) further comprises a valve body (311) and a lower valve cover (302) and an upper valve cover (312) located on both sides thereof, wherein a lower valve cover (301) is mounted on the lower valve cover (302), a lower valve stem (303) is mounted inside the lower valve cover (302), an upper valve stem (308) is mounted inside the upper valve cover (312), a bracket (307) is mounted on one end of the upper valve cover (312) close to the driver (309), the upper valve stem (308) passes through the bracket (307) and is connected to the driver (309), a valve plate (305) is mounted between the lower valve stem (303) and the upper valve stem (308), a valve seat (306) is mounted inside the valve body (311), the valve plate (305) cooperates with the valve seat (306), and grease injection valves (304) are mounted on both the lower valve cover (302) and the upper valve cover (312).

7. A 175MPa gas production wellhead device according to claim 1, characterized in that: The tubing head assembly (2) comprises a tubing head body (206) and a grease injection port (207) installed thereon; a tubing hanger (202) is installed inside the tubing head body (206); both sides of the tubing head body (206) are connected to a square straight-through stop valve (204) and an electric gate valve (201) via a manual gate valve (203); and a pressure gauge (205) is installed on the square straight-through stop valve (204).

8. A 175MPa gas production wellhead device according to claim 1, characterized in that: An instrument connection flange (104) and a pressure gauge (105) are installed between the conversion joint (103) and the hydraulic safety valve (106), and an instrument flange (107) is installed on the hydraulic safety valve (106).

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