A wellhead device for gas extraction and its control system

Abstract

This invention discloses a wellhead device and its control system for gas extraction, including a gas field bridge assembly and a gas output mechanism. A sealing support sleeve is fitted onto the top of the gas field bridge assembly, and a bolted casing sealing component is located at the top of the sealing support sleeve. A bolted gas pipe head sealing kit is located at the top of the casing sealing component. The device utilizes the internal partition structure of the valve shell to allow a powerful hydraulic telescopic frame on the top frame to raise and lower a semi-arc plug. During this raising and lowering process, the gas flow is output through the valve shell and can be pressed against the adaptable telescopic rod and the force-bearing push plug, effectively adjusting the output direction of the valve shell. This allows for continuous operation even when the equipment requires maintenance, even when using a two-way and three-way gas output valve.

Description

Technical Field

[0001] This invention relates to the field of gas wellhead technology, and in particular to a wellhead device for gas production and its control system. Background Technology

[0002] A gas well is a production well drilled to extract natural gas according to a gas field development plan or adjustment plan. It is the basic unit of gas reservoir development, bringing underground natural gas resources to the surface as a product, and then converting them into commodities and profits. Gas wells not only bear the important responsibility of gas extraction, but also, through production data, well testing, pressure measurement, and oil, gas and water sample composition analysis, we can understand the gas reservoir parameters and gas well dynamics, take appropriate measures to maintain reasonable gas well production, and thus regulate the gas reservoir development process. Gas wells do not exist in isolation. They are deployed according to the gas field development plan, a certain development method, and a divided stratum, solving problems such as well network density, the relationship between primary and secondary well networks, and well placement methods, so as to make the well network and well spacing reasonable, control the amount of reserves to be utilized, and achieve the required production capacity.

[0003] Existing wellhead devices and their control systems for gas production, such as the gas production wellhead device for shale gas drilling and production described in application number CN202322745020.9, consist of two main components: the tubing head and the tree. In the tubing head component, the tubing head four-way valve is integrated with a large-diameter flat valve. The tubing hanger used in the tubing head component employs two FS-type sealing rings at the top and a combination of a rubber sealing ring and two metal sealing rings at the bottom. The throttle valves used in the tree are all "a type of arc-shaped concave wedge-type manual throttle valve." The flat valves used in both components are all "a type of ultra-high pressure sand-resistant ball screw rising rod flat valve." The pressure testing components consist of a lower double male connector, a middle shut-off buffer valve, and an upper pressure gauge. Furthermore, the throttle valve's valve core and seat are both made entirely of hard alloy material, and the wedge surface of its valve core is a single arc-shaped concave surface. The shut-off buffer valve has both shut-off and buffering functions. Therefore, it has the characteristics of small size, easy operation and greater safety; however, the above technologies mainly use a vertical pipeline for unidirectional output. When the gas delivery end fails and cannot be stopped, it is inconvenient to continue working. To address this problem, we propose a wellhead device and its control system for gas extraction. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a wellhead device and its control system for gas production. This device and control system primarily utilize a partitioned structure within the inner liner valve housing to allow a powerful hydraulic telescopic frame on the connecting top frame to raise and lower a semi-arc plug. During this raising and lowering process, the airflow direction is output through the inner liner valve housing and can be pressed together with the adaptable telescopic rod and the force-bearing push plug, effectively adjusting the output direction of the inner liner valve housing. This ensures continuous operation even when the equipment requires maintenance, even when using a two-way and three-way gas outlet valve pipe for output.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A wellhead device for gas production and its control system include a gas-field bridge assembly and a gas output mechanism. A sealing support sleeve is provided above the gas-field bridge assembly, and a casing sealing component is provided at the top of the sealing support sleeve. A gas pipe head sealing kit is provided at the top of the casing sealing component, and a gas output mechanism is provided at the top of the gas pipe head sealing kit.

[0007] As a further technical solution, the gas-field bridge assembly includes a mine surface base plate, a lower sealing duct, a bottom rubber ring, a gas-field pipe, a threaded rubber ring for the mine pipe, a lower sealing bolt disc, a duct block, a shock-absorbing support, and bolt base washers. The inner side of the mine surface base plate is provided with a lower sealing duct that is fitted together. The inner sides of both ends of the lower sealing duct are provided with bottom rubber rings, and the inner side of the bottom rubber rings is provided with a gas-field pipe. The upper outer side of the gas-field pipe is provided with a threaded rubber ring for the mine pipe. The lower outer side of the gas-field pipe is bolted to the duct block via the lower sealing bolt disc. The lower perimeter of the duct block is provided with shock-absorbing supports, and the bottom end of the shock-absorbing supports is provided with bolt base washers.

[0008] As a further technical solution, the sealing support sleeve includes a symmetrical bracket, a bottom support plate, an upper sealing duct, a lifting frame, a grooved support ring, and a sealing rubber ring. The symmetrical bracket is bolted to the upper ends of the duct block. The bottom support plate is provided on the upper inner side of the symmetrical bracket, and the upper sealing duct is provided on the inner side of the bottom support plate. The lifting frame is provided on the upper outer side of the bottom support plate, and the grooved support ring is provided on the upper upper side of the lifting frame. The sealing rubber ring is provided on the upper inner side of the grooved support ring.

[0009] As a further technical solution, the sleeve sealing component includes a sleeve flange, a sleeve body, sleeve bolts, hex bolts, a sealing shaft seal seat, a spline sleeve, a sleeve rubber outer ring, a sleeve rubber inner ring, a sleeve pressure measuring chamber, a pressure measuring rod, a pressure measuring ball plug, an external sensor, an instrument panel, and a sleeve head output valve pipe. The sleeve flange is bolted to the upper side of the grooved support ring by sleeve bolts. The sleeve body is provided on the upper inner side of the sleeve flange. A hex bolt is provided on the outer side of the sleeve flange. A sealing shaft seal seat is provided at the output end of the hex bolt. A spline sleeve is provided at the inner end of the sealing shaft seal seat. A sleeve rubber outer ring is installed by insertion at the inner end of the spline sleeve. A sleeve rubber inner ring is provided on the inner side of the sleeve rubber outer ring.

[0010] As a further technical solution, a casing pressure testing chamber is provided on one side of the casing body, and a pressure testing rod is provided on the inner side of the casing pressure testing chamber. A pressure testing ball plug is provided at the inner end of the pressure testing rod. An external sensor is provided on the outer side of the casing pressure testing chamber, and an instrument panel is provided above one end of the external sensor. A casing head output valve pipe is provided on the other side of the casing body.

[0011] As a further technical solution, the endotracheal tube sealing kit includes a sealing gasket, an endotracheal tube flange shell, endotracheal tube bolts, an endotracheal tube shaft seal, an endotracheal tube rubber seal ring, a threaded inner shell, a lower arc-shaped insert ring, a first inner rubber ring, a rubber ring inner shell, a lower support base, a circular rubber ring, an arc-shaped groove rubber ring seat, a receiving ring seat, a movable handle, a plug connector, an inner rubber ring shell, an endotracheal tube outlet valve, an endotracheal tube outlet valve, and an outlet valve pressure gauge. The sealing gasket is positioned above the sleeve flange, and the upper part of the sealing gasket... The device is equipped with a tracheal flange shell, and a tracheal bolt is installed on the upper outer side of the tracheal flange shell. Tracheal shaft seals are installed on the inner sides of both ends of the tracheal flange shell, and a tracheal rubber seal is installed on the inner end of the tracheal shaft seal. A tracheal outlet valve is installed on one side of the tracheal flange shell, and a tracheal outlet valve is installed on the other side of the tracheal flange shell. A pressure gauge for the outlet valve is installed on the upper side of one side of the outlet valve.

[0012] As a further technical solution, the inner side of the tracheal flange shell is provided with a threaded inner shell with a threaded connection, and the bottom end of the threaded inner shell is provided with a lower arc insertion ring. The lower inner side of the threaded inner shell is provided with a first inner rubber ring, and the upper part of the first inner rubber ring is provided with a rubber ring inner shell. The lower inner side of the rubber ring inner shell is provided with a lower support base, and the upper part of the lower support base is provided with a circular rubber ring. The upper part of the circular rubber ring is provided with an arc-shaped groove rubber ring seat, and the upper inner side of the arc-shaped groove rubber ring seat is provided with a receiving ring seat. The upper ends of the receiving ring seat are provided with movable handles, and the inner rubber ring shell is connected to the upper inner side of the receiving ring seat through a plug connector.

[0013] As a further technical solution, the gas output mechanism includes an upper top pad, a gas supply pipe flange, a gas supply bolt, a gas supply pipe shell, an outer protective shell, an inner valve shell, a connecting frame, a high-strength hydraulic telescopic frame, a semi-arc plug, an adaptive telescopic rod, a force-bearing push plug, a branch pipe, a gas supply first outlet valve pipe, a gas supply second outlet valve pipe, and a gas supply third outlet valve pipe. The upper top pad is located at the top of the gas supply pipe flange shell. The top of the upper top pad is bolted to the gas supply pipe flange via the gas supply bolt. The gas supply pipe shell is located on the upper inner side of the gas supply pipe flange, and an outer protective shell is located on the outer side of the gas supply pipe shell. A branch pipe is located above the gas supply pipe shell, and a gas supply first outlet valve pipe is located at the top of the branch pipe. A gas supply second outlet valve pipe is fitted onto one side of the branch pipe, and a gas supply third outlet valve pipe is fitted onto the other side of the branch pipe.

[0014] As a further technical solution, an inner liner valve shell is provided on the inner side of the gas pipeline shell, and a connecting top frame is provided on the upper inner side of the inner liner valve shell. A powerful hydraulic telescopic frame is provided below the connecting top frame, and a semi-arc plug is provided at the output end of the powerful hydraulic telescopic frame. An adaptive telescopic rod is provided on the middle inner side of the inner liner valve shell, and a force-bearing push plug is provided at the output end of the adaptive telescopic rod.

[0015] As a further technical solution, in use, a ore face base plate is laid on top of the gas field, and a lower sealing duct is cast on the inner side of the ore face base plate. Upper bottom rubber rings are installed on the inner sides of both ends of the lower sealing duct to clamp the gas field pipe, connecting the gas field pipe inside the gas field. The upper outer thread of the gas field pipe is connected to the ore pipe thread rubber ring, and shock-absorbing supports and bolt base washers are bolted together around the upper perimeter of the ore face base plate. The duct block and the lower sealing bolt disc are then bolted to the gas field pipe. Next, symmetrical brackets at both ends of the bottom support plate are bolted to the upper ends of the duct block to achieve a bolted connection. This allows the bottom support plate to seal the upper sealing duct and the gas field pipe, and the lifting frame to support the trough-shaped support... After the ring effectively lifts the casing, the sealing ring bolts the casing sealing components together. When further splicing is required, the casing flange is used in conjunction with the casing body and casing bolts. The casing flange bolts are then connected to the upper side of the grooved support ring and the sealing ring. The hexagonal bolts at both ends of the casing flange output power to drive the output end. After the spiral runs, the sealing shaft seat and splined sleeve rotate, causing the outer and inner rings of the casing rubber to tightly lock and fit the end of the gas pipe. The threaded groove on the inner side of the casing body then spirally splices the spiral protrusion of the gas pipe. When pressure testing is required, the pressure testing rod on the casing pressure testing chamber is used in conjunction with the pressure testing ball plug to test the internal pipeline. The pressure is applied to achieve the effect of contact pressure, allowing the instrument panel above the external sensor to effectively display the internal pressure of the pipeline. When output is required, the output valve is opened using the sleeve head to allow the internal natural gas to be output. When sealing is required, the gas pipe flange shell is used in conjunction with the gas pipe bolts and bolted to the side of the sealing gasket. The threaded inner shell, in conjunction with the lower arc insert ring, spirals and is positioned inside the gas pipe flange shell. The lower arc insert ring is then sealed and inserted into the top of the gas pipe. A first inner rubber ring is placed on the lower inner side of the threaded inner shell, and the inner shell of the rubber ring is fitted with the lower support base and the circular rubber ring is fitted onto the inner side of the threaded inner shell. The movable handle is then... The inner rubber ring is inserted into the upper part of the arc-shaped groove rubber ring seat, thus achieving an effective sealing and transmission effect after the inner rubber ring shell is inserted, effectively preventing air leakage. When output is required at the gas pipe head sealing kit, the gas pipe outlet valve and gas pipe outlet valve at both ends of the gas pipe flange shell are used to open and output natural gas. The pressure is measured using the pressure gauge on the outlet valve. When pipeline output adjustment is required, the powerful hydraulic telescopic frame under the connecting bracket on the inner liner valve shell is used to output power, causing the semi-arc plug to move slowly inside the inner liner valve shell. This slow movement allows airflow to enter the inner liner valve shell. When direction adjustment is required...The use of an adaptive telescopic rod and a powerful hydraulic telescopic frame for output operation allows for the adjustment of the positions of the force-bearing push plug and the semi-arc plug, thereby regulating the airflow direction within the valve housing. When direction adjustment is required within the semi-arc plug, the second and third outlet valves on the side of the branch pipe are opened adaptively to achieve the desired airflow output. In the event of a pipe rupture, the first outlet valve is opened to relieve pressure, thus improving equipment safety while simultaneously reducing pressure.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The invention mainly utilizes the internal partition structure of the inner valve housing to enable the powerful hydraulic telescopic frame on the top frame to raise and lower the semi-arc plug. During the raising and lowering process, the airflow direction is output through the inner valve housing, and it can be pressed together with the adaptable telescopic rod and the force-bearing push plug, so that the output direction of the inner valve housing can be effectively adjusted. In this way, when using the two-way and three-way air outlet valve pipes for output, the equipment can still achieve continuous operation when maintenance is required. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a wellhead device and its control system used for gas extraction.

[0019] Figure 2 This is a schematic diagram of the structure viewed from below in this invention;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure in this invention;

[0021] Figure 4 This is a schematic diagram of the sealing and lifting sleeve structure in this invention;

[0022] Figure 5 This is a schematic diagram of the sleeve sealing component in this invention;

[0023] Figure 6 This is a schematic diagram of the structure of the endotracheal tube sealing kit in this invention;

[0024] Figure 7 This is a schematic diagram of the structure of the trachea bolt and trachea shaft seal in this invention;

[0025] Figure 8 This is a schematic diagram of the air output mechanism in this invention;

[0026] Figure 9 This is a schematic diagram of the directional pipe in this invention.

[0027] In the diagram: 1. Gas-field connecting bridge assembly; 101. Mine surface base plate; 102. Lower sealing duct; 103. Bottom rubber ring; 104. Gas-field pipe; 105. Mine pipe threaded rubber ring; 106. Lower sealing bolt disc; 107. Duct block; 108. Shock-absorbing support; 109. Bolt base gasket; 2. Sealing support sleeve; 201. Symmetrical bracket; 202. Bottom support plate; 203. Upper sealing duct; 204. Lifting frame; 205. Groove support ring; 206. Sealing rubber ring; 3. Sleeve sealing component; 301. Sleeve flange; 302. Sleeve body; 303. Sleeve bolt; 304. Hex bolt; 305. Sealing shaft seat; 306. Splined sleeve; 307. Sleeve rubber outer ring; 308. Sleeve rubber inner ring; 309. Sleeve pressure chamber; 3010. Pressure measuring rod; 3011. Pressure measuring ball plug; 3012. External sensor; 3013. Instrument panel; 3014. Sleeve head output valve pipe; 4. Gas pipe head sealing kit; 401. Sealing gasket; 402. Gas pipe flange shell; 403. Tracheal tube bolt; 404. Tracheal tube shaft seal; 405. Tracheal tube rubber seal ring; 406. Threaded inner shell; 407. Lower arc insert ring; 408. First inner rubber ring; 409. Rubber ring inner shell; 4010. Lower support base; 4011. Circular rubber ring; 4012. Arc-groove rubber ring seat; 4013. Insert ring seat; 4014. Movable handle; 4015. Connector; 4016. Inner rubber ring shell; 4017. Tracheal tube outlet valve; 4018. Tracheal tube outlet valve; 4019. 5. Pressure gauge for two outlet valves; 6. Gas output mechanism; 7. Top gasket; 8. Gas supply pipe flange; 9. Gas supply bolt; 10. Gas supply pipe shell; 11. Outer protective shell; 2. Inner valve shell; 3. Top connecting frame; 4. Heavy-duty hydraulic telescopic frame; 509. Semi-arc plug; 6. Adaptive telescopic rod; 7. Force-bearing push plug; 8. Diverting pipe; 9. Gas supply first outlet valve; 10. Gas supply second outlet valve; 11. Gas supply third outlet valve. Detailed Implementation

[0028] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0029] 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 will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-9 In this embodiment of the invention, a wellhead device for gas extraction includes a gas-field bridge assembly 1 and a gas output mechanism 5. A sealing support sleeve 2 is provided above the gas-field bridge assembly 1, and a casing sealing component 3 is provided at the top of the sealing support sleeve 2. A gas pipe head sealing kit 4 is provided at the top of the casing sealing component 3, and a gas output mechanism 5 is provided at the top of the gas pipe head sealing kit 4.

[0032] The gas-field bridge assembly 1 includes a mine surface base plate 101, a lower sealing duct 102, a bottom rubber ring 103, a gas-field pipe 104, a mine pipe threaded rubber ring 105, a lower sealing bolt disc 106, a duct block 107, a shock-absorbing support 108, and a bolt base washer 109. The lower sealing duct 102 is provided on the inner side of the mine surface base plate 101 and is fitted with a bottom rubber ring 103 on the inner side of both ends of the lower sealing duct 102. The gas-field pipe 104 is provided on the inner side of the bottom rubber ring 103. The mine pipe threaded rubber ring 105 is provided on the outer side of the upper part of the gas-field pipe 104. The duct block 107 is bolted to the outer side of the lower part of the gas-field pipe 104 through the lower sealing bolt disc 106. The shock-absorbing support 108 is provided around the lower part of the duct block 107, and the bolt base washer 109 is provided at the bottom end of the shock-absorbing support 108.

[0033] In an embodiment of the present invention, during use, a ore surface substrate 101 is laid on top of the gas field, and a lower sealing duct 102 is cast on the inner side of the ore surface substrate 101. An upper bottom rubber ring 103 is provided on the inner side of both ends of the lower sealing duct 102 to snap the gas field pipe 104 together, so that the gas field pipe 104 is connected to the inside of the gas field. An upper ore pipe thread rubber ring 105 is threaded on the upper outer side of the gas field pipe 104, and the shock-absorbing support 108 and bolt base pad 109 are bolted together on the upper periphery of the ore surface substrate 101 so that the duct block 107 and the lower sealing bolt disc 106 are bolted to the gas field pipe 104.

[0034] The sealing support sleeve 2 includes a symmetrical bracket 201, a bottom support plate 202, an upper sealing duct 203, a lifting frame 204, a grooved support ring 205, and a sealing rubber ring 206. The symmetrical bracket 201 is bolted to the upper ends of the duct block 107. The bottom support plate 202 is provided on the inner side of the upper part of the symmetrical bracket 201, and the upper sealing duct 203 is provided on the inner side of the bottom support plate 202. The lifting frame 204 is provided on the upper side of the bottom support plate 202, and the grooved support ring 205 is provided on the upper side of the lifting frame 204. The sealing rubber ring 206 is provided on the upper inner side of the grooved support ring 205.

[0035] In an embodiment of the present invention, the symmetrical brackets 201 below both ends of the bottom support plate 202 are then bolted to the upper ends of the duct block 107 to achieve the effect of bolt splicing. This allows the bottom support plate 202 to seal the upper sealing duct 203 and the gas mine pipe 104, and the lifting frame 204 to effectively lift the grooved support ring 205 so that the sealing rubber ring 206 bolts the sleeve sealing component 3.

[0036] The sleeve sealing component 3 includes a sleeve flange 301, a sleeve body 302, sleeve bolts 303, hex bolts 304, a sealing shaft seal 305, a splined sleeve 306, a sleeve rubber outer ring 307, a sleeve rubber inner ring 308, a sleeve pressure measuring chamber 309, a pressure measuring rod 3010, a pressure measuring ball plug 3011, an external sensor 3012, an instrument panel 3013, and a sleeve head output valve pipe 3014. The sleeve flange 301 is bolted to the groove by the sleeve bolts 303. Above the side of the support ring 205, above the inner side of the sleeve flange 301, a sleeve body 302 is provided. A hexagonal bolt 304 is provided on the outer side of the sleeve flange 301. A sealing shaft seat 305 is provided at the output end of the hexagonal bolt 304. A spline sleeve 306 is provided at the inner end of the sealing shaft seat 305. A sleeve rubber outer ring 307 for plug-in installation is provided at the inner end of the spline sleeve 306. A sleeve rubber inner ring 308 is provided on the inner side of the sleeve rubber outer ring 307.

[0037] In embodiments of the present invention, when further splicing is required, the sleeve flange 301 is used in conjunction with the sleeve body 302 and the sleeve bolts 303 for bolt splicing, so that the sleeve flange 301 is bolted to the upper side of the grooved support ring 205 and the sealing ring 206, and the hexagonal bolts 304 at both ends of the sleeve flange 301 output power to drive the output end to run, and after the spiral runs, the sealing shaft seat 305 and the spline sleeve 306 rotate and transmit, so that the outer ring 307 and the inner ring 308 of the sleeve rubber tightly lock and fit the end of the gas field pipe 104, and the threaded groove on the inner side of the sleeve body 302 spirally splices the spiral protrusion of the gas field pipe 104.

[0038] A casing housing 302 has a casing pressure testing chamber 309 installed on one side, and a pressure testing rod 3010 is installed on the inner side of the casing pressure testing chamber 309. A pressure testing ball plug 3011 is installed at the inner end of the pressure testing rod 3010. An external sensor 3012 is installed on the outer side of the casing pressure testing chamber 309, and an instrument panel 3013 is installed above one end of the external sensor 3012. A casing head output valve pipe 3014 is installed on the other side of the casing housing 302.

[0039] In embodiments of the present invention, when pressure measurement is required, the pressure measuring rod 3010 on the casing pressure measuring chamber 309 is used in conjunction with the pressure measuring ball plug 3011 to measure the internal pipeline pressure to achieve the effect of contact pressure, and the instrument panel 3013 above the external sensor 3012 effectively displays the internal pipeline pressure. When output is required, the casing head output valve pipe 3014 is opened to allow the internal natural gas to be output.

[0040] The endotracheal tube sealing kit 4 includes a sealing gasket 401, an endotracheal tube flange shell 402, an endotracheal tube bolt 403, an endotracheal tube shaft seal 404, an endotracheal tube rubber seal ring 405, a threaded inner shell 406, a lower arc-shaped insert ring 407, a first inner rubber ring 408, a rubber ring inner shell 409, a lower support base 4010, a circular rubber ring 4011, an arc-shaped groove rubber ring seat 4012, a receiving insert ring seat 4013, a movable handle 4014, a plug connector 4015, an inner rubber ring shell 4016, an endotracheal tube first outlet valve 4017, an endotracheal tube second outlet valve 4018, and a second outlet valve pressure gauge 4019. The sealing gasket 401 is installed on the sleeve flange 301. Above the sealing gasket 401, a gas pipe flange shell 402 is provided, and a gas pipe bolt 403 is provided on the upper outer side of the gas pipe flange shell 402. Gas pipe shaft seals 404 are provided on the inner sides of both ends of the gas pipe flange shell 402, and a gas pipe rubber seal ring 405 is provided on the inner end of the gas pipe shaft seal 404. A gas pipe first outlet valve pipe 4017 is provided on one side of the gas pipe flange shell 402, and a gas pipe second outlet valve pipe 4018 is provided on the other side of the gas pipe flange shell 402. A second outlet valve pipe pressure gauge 4019 is provided on the upper side of one side of the second outlet valve pipe 4018.

[0041] In an embodiment of the present invention, when it is necessary to output through the gas pipe head sealing kit 4, the gas pipe outlet valve 4017 and the gas pipe outlet valve 4018 provided at both ends of the gas pipe flange shell 402 are used to open and output natural gas, and the pressure is measured according to the pressure gauge 4019 of the outlet valve.

[0042] The inner side of the gas pipe flange shell 402 is provided with a threaded inner shell 406 with a threaded connection, and the bottom end of the threaded inner shell 406 is provided with a lower arc insertion ring 407. The lower inner side of the threaded inner shell 406 is provided with a first inner rubber ring 408, and the upper part of the first inner rubber ring 408 is provided with a rubber ring inner shell 409. The lower inner side of the rubber ring inner shell 409 is provided with a lower support base 4010, and the upper part of the lower support base 4010 is provided with a circular rubber ring 4011. The upper part of the circular rubber ring 4011 is provided with an arc groove rubber ring seat 4012, and the upper inner side of the arc groove rubber ring seat 4012 is provided with a receiving ring seat 4013. The upper parts of both ends of the receiving ring seat 4013 are provided with movable handles 4014. The inner upper part of the receiving ring seat 4013 is connected to the inner rubber ring shell 4016 through a plug connector 4015.

[0043] In embodiments of the present invention, when a sealing setting is required, the gas pipe flange shell 402 is bolted to the upper side of the sealing gasket 401 using a gas pipe bolt 403. The threaded inner shell 406, in conjunction with the lower arc-shaped insert ring 407, spirals and is positioned inside the gas pipe flange shell 402. The lower arc-shaped insert ring 407 is then sealed and inserted into the top of the gas pipe 104. A first inner rubber ring 408 is positioned on the lower inner side of the threaded inner shell 406. The inner rubber ring shell 409 is fitted onto the inner side of the threaded inner shell 406, allowing the lower support base 4010 to engage with the circular rubber ring 4011. The movable handle 4014, in conjunction with the insert ring seat 4013, is inserted above the arc-shaped groove rubber ring seat 4012. This insertion of the inner rubber ring shell 4016 achieves an effective sealing and transmission effect, effectively preventing air leakage.

[0044] The gas output mechanism 5 includes an upper top gasket 501, a gas supply pipe flange 502, a gas supply bolt 503, a gas supply pipe shell 504, an outer protective shell 505, an inner valve shell 506, a connecting frame 507, a high-strength hydraulic telescopic frame 508, a semi-arc plug 509, an adaptive telescopic rod 5010, a force-bearing push plug 5011, a branch pipe 5012, a gas supply outlet valve pipe 5013, a gas supply outlet valve pipe 5014, and a gas supply outlet valve pipe 5015. The upper top gasket 501 is located at the top of the gas pipe flange shell 402. A gas supply pipe flange 502 is bolted to the gas supply pipe bolt 503. A gas supply pipe shell 504 is provided on the upper inner side of the gas supply pipe flange 502, and an outer protective shell 505 is provided on the outer side of the gas supply pipe shell 504. A branch pipe 5012 is provided on the upper part of the gas supply pipe shell 504, and a gas supply first outlet valve pipe 5013 is provided at the top end of the branch pipe 5012. A gas supply second outlet valve pipe 5014 is provided on one side of the branch pipe 5012 and a gas supply third outlet valve pipe 5015 is provided on the other side of the branch pipe 5012.

[0045] In an embodiment of the present invention, when it is necessary to adjust the direction within the semi-arc plug 509, the second gas outlet valve 5014 and the third gas outlet valve 5015 on the side of the branch pipe 5012 are opened adaptively to achieve the effect of outputting airflow. When a pipe bursts, the first gas outlet valve 5013 needs to be opened to achieve the effect of depressurization, thereby improving the safety of the equipment while depressurizing.

[0046] An inner liner valve housing 506 is provided on the inner side of the gas pipe shell 504 and is fitted with it. A connecting top frame 507 is provided on the upper inner side of the inner liner valve housing 506. A high-power hydraulic telescopic frame 508 is provided below the connecting top frame 507. A semi-arc plug 509 is provided at the output end of the high-power hydraulic telescopic frame 508. An adaptable telescopic rod 5010 is provided on the middle inner side of the inner liner valve housing 506. A force-bearing push plug 5011 is provided at the output end of the adaptable telescopic rod 5010.

[0047] In embodiments of the present invention, when pipeline output adjustment is required, the powerful hydraulic telescopic frame 508 below the connecting bracket 507 on the inner liner valve housing 506 is used to output power, causing the semi-arc plug 509 to operate slowly inside the inner liner valve housing 506. After slow operation, airflow is input into the inner liner valve housing 506. When direction adjustment is required, the adaptive telescopic rod 5010 and the powerful hydraulic telescopic frame 508 are used to output power, causing the position of the force-bearing push plug 5011 and the semi-arc plug 509 to be adjusted, thereby achieving the effect of adjusting the airflow direction of the inner liner valve housing 506.

[0048] A control system for a wellhead device used for gas extraction involves laying a mine face base plate 101 above the gas field, casting a lower sealing duct 102 on the inner side of the mine face base plate 101, and attaching upper bottom rubber rings 103 to the inner sides of both ends of the lower sealing duct 102 to clamp the gas field pipe 104, thus connecting the gas field pipe 104 to the inside of the gas field. An upper threaded rubber ring 105 is then threaded onto the outer side of the gas field pipe 104. Shock-absorbing supports 108 and bolt base washers 109 are bolted together around the upper perimeter of the mine face base plate 101, allowing the duct block 107 to be bolted to the lower sealing bolt disc 106 and connected to the gas field pipe 104. Finally, symmetrical brackets 201 at both ends of the bottom support plate 202 are bolted to the duct block. Above both ends of 107, to achieve the effect of bolt splicing, the bottom support plate 202 seals the upper sealing duct 203 and the gas mine pipe 104 as a sealing assembly, and the lifting frame 204 effectively lifts the grooved support ring 205, so that the sealing ring 206 bolts the casing sealing component 3. When further splicing is required, the casing flange 301 is used in conjunction with the upper casing shell 302 and the casing bolts 303 to splice the casing flange 301 to be bolted to the upper side of the grooved support ring 205 and the sealing ring 206, and the hexagonal bolts 304 at both ends of the casing flange 301 output power to drive the output end to run, and after the spiral runs, the sealing shaft seat 305 and the splined sleeve 306 rotate and transmit power, so that... The outer ring 307 and inner ring 308 of the casing rubber tightly lock and fit the end of the gas field pipe 104, and the threaded groove on the inner side of the casing shell 302 spirally splices the helical protrusion of the gas field pipe 104. When pressure testing is required, the pressure measuring rod 3010 on the casing pressure measuring chamber 309 is used in conjunction with the pressure measuring ball plug 3011 to measure the internal pipeline pressure to achieve the effect of contact pressure, and the instrument panel 3013 above the external sensor 3012 effectively displays the internal pipeline pressure. When downward output is required, the output valve pipe 3014 of the casing head is used to open it to allow the internal natural gas to be output. When sealing is required, the gas pipe flange shell 402 is used in conjunction with the gas... The pipe bolt 403 is bolted to the upper side of the sealing gasket 401, and the threaded inner shell 406, in conjunction with the lower arc-shaped insert ring 407, spirals and is positioned inside the gas pipe flange shell 402. The lower arc-shaped insert ring 407 is then sealed and inserted into the top of the gas pipe 104. A first inner rubber ring 408 is positioned on the lower inner side of the threaded inner shell 406. The inner shell 409, with its rubber ring, allows the lower support base 4010 to engage with the circular rubber ring 4011, which is then fitted onto the inner side of the threaded inner shell 406. The movable handle 4014, in conjunction with the insert ring seat 4013, is inserted above the arc-shaped groove rubber ring seat 4012. This connection of the inner rubber ring shell 4016 achieves an effective sealing and transmission effect, effectively preventing air leakage.When output is required at the gas pipe head sealing kit 4, the gas pipe outlet valve 4017 and gas pipe outlet valve 4018 located at both ends of the gas pipe flange shell 402 are opened to achieve the effect of natural gas output. The pressure is measured by the pressure gauge 4019 on the outlet valve. When pipeline output adjustment is required, the powerful hydraulic telescopic frame 508 below the connecting frame 507 on the inner liner valve shell 506 is used to output power, causing the semi-arc plug 509 to move slowly inside the inner liner valve shell 506. After slow movement, airflow is input into the inner liner valve shell 506. When direction adjustment is required, the adaptive telescopic rod 5010 and the powerful hydraulic telescopic frame 508 are used for output operation, which adjusts the position of the force-bearing push plug 5011 and the semi-arc plug 509, thereby adjusting the airflow direction of the inner valve housing 506. When direction adjustment is required within the semi-arc plug 509, the second and third air outlet valves 5014 and 5015 on the side of the branch pipe 5012 are opened adaptively to achieve the effect of outputting airflow. In the event of a pipe rupture, the first air outlet valve 5013 needs to be opened to achieve a pressure relief effect, improving equipment safety while relieving pressure.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A wellhead device for gas production, comprising a gas wellhead adapter assembly (1) and a gas output mechanism (5), characterized in that: The air mine connecting bridge assembly (1) is provided with a sealing lifting sleeve (2) installed in a sleeved manner, the top end of the sealing lifting sleeve (2) is provided with a sleeve sealing part (3) installed in a bolted manner, the top end of the sleeve sealing part (3) is provided with a gas pipe head sealing sleeve (4) installed in a bolted manner, and the top end of the gas pipe head sealing sleeve (4) is provided with a gas connection output mechanism (5) installed in a bolted manner; The gas pipe head sealing sleeve (4) comprises a gas pipe flange shell (402); The gas connection output mechanism (5) comprises an upper top pad (501), a gas pipe flange (502), a gas bolt (503), a gas pipe shell body (504), an outer protective shell (505), an inner lining valve shell (506), a connection top frame (507), a powerful hydraulic telescopic frame (508), a semi-arc plug (509), an adaptive telescopic rod (5010), a force pushing plug (5011), a branch pipe (5012), a gas outlet valve pipe (5013), a gas outlet valve pipe (5014) and a gas outlet valve pipe (5015), the upper top pad (501) is arranged at the top end of the gas pipe flange shell (402), the top end of the upper top pad (501) is connected with the gas pipe flange (502) in a bolted manner through the gas bolt (503), the inner side of the gas pipe flange (502) is provided with the gas pipe shell body (504), the outer side of the gas pipe shell body (504) is provided with the outer protective shell (505), the top of the gas pipe shell body (504) is provided with the branch pipe (5012), and the top end of the branch pipe (5012) is provided with the gas outlet valve pipe (5013), one side of the branch pipe (5012) is provided with the gas outlet valve pipe (5014) installed in a sleeved manner, and the other side of the branch pipe (5012) is provided with the gas outlet valve pipe (5015) installed in a sleeved manner; The inner side of the gas pipe shell body (504) is provided with the inner lining valve shell (506) installed in a sleeved manner, the top of the inner lining valve shell (506) is provided with the connection top frame (507), the lower side of the connection top frame (507) is provided with the powerful hydraulic telescopic frame (508), the output end of the powerful hydraulic telescopic frame (508) is provided with the semi-arc plug (509), the inner side of the middle part of the inner lining valve shell (506) is provided with the adaptive telescopic rod (5010), and the output end of the adaptive telescopic rod (5010) is provided with the force pushing plug (5011).

2. A wellhead apparatus for gas production according to claim 1, characterised in that: The air mine bridge assembly (1) comprises a mine surface base plate (101), a lower sealing tunnel (102), a bottom rubber ring (103), an air mine pipe (104), a mine pipe threaded rubber ring (105), a lower sealing bolt disc (106), a tunnel block (107), a shock absorbing support (108) and a bolt base pad (109), the inner side of the mine surface base plate (101) is provided with a sleeved and mounted lower sealing tunnel (102), the inner side of the two ends of the lower sealing tunnel (102) is provided with a bottom rubber ring (103), and the inner side of the bottom rubber ring (103) is provided with an air mine pipe (104), the upper outer side of the air mine pipe (104) is provided with a mine pipe threaded rubber ring (105), the lower outer side of the air mine pipe (104) is bolted with a tunnel block (107) through a lower sealing bolt disc (106), the lower part of the periphery of the tunnel block (107) is provided with a shock absorbing support (108), and the bottom end of the shock absorbing support (108) is provided with a bolt base pad (109).

3. A wellhead apparatus for gas production according to claim 2, characterised in that: The sealing support sleeve (2) comprises a symmetrical bracket (201), a bottom support plate (202), an upper sealing tunnel (203), a lifting frame (204), a slot type support ring (205) and a sealing rubber ring (206), the symmetrical bracket (201) is bolted on the upper two ends of the tunnel block (107), the upper inner side of the symmetrical bracket (201) is provided with a bottom support plate (202), and the inner side of the bottom support plate (202) is provided with an upper sealing tunnel (203), the upper outer side of the bottom support plate (202) is provided with a lifting frame (204), and the upper side of the lifting frame (204) is provided with a slot type support ring (205), the inner side of the slot type support ring (205) is provided with a sealing rubber ring (206).

4. A wellhead apparatus for gas production according to claim 3, characterised in that: The sleeve sealing part (3) comprises a sleeve flange (301), a sleeve body shell (302), a sleeve bolt (303), a hexagonal bolt (304), a sealing shaft seal seat (305), a spline sleeve strip (306), a sleeve rubber outer ring (307), a sleeve rubber inner ring (308), a sleeve pressure measuring cabin (309), a pressure measuring rod (3010), a pressure measuring ball plug (3011), an external sensor (3012), an instrument panel (3013) and a sleeve head output valve pipe (3014), the sleeve flange (301) is bolted on the side of the slot type support ring (205) through the sleeve bolt (303), the inner side of the sleeve flange (301) is provided with a sleeve body shell (302), the outer side of the sleeve flange (301) is provided with a hexagonal bolt (304), the output end of the hexagonal bolt (304) is provided with a sealing shaft seal seat (305), and the inner end of the sealing shaft seal seat (305) is provided with a spline sleeve strip (306), the inner end of the spline sleeve strip (306) is provided with a sleeved and mounted sleeve rubber outer ring (307), and the inner side of the sleeve rubber outer ring (307) is provided with a sleeve rubber inner ring (308).

5. A wellhead apparatus for gas production according to claim 4, characterised in that: The side of the sleeve body shell (302) is provided with a sleeve pressure chamber (309) installed in sleeve, and the inner side of the sleeve pressure chamber (309) is provided with a pressure rod (3010), the inner end of the pressure rod (3010) is provided with a pressure ball plug (3011), the outer side of the sleeve pressure chamber (309) is provided with an external sensor (3012), and the upper end of the external sensor (3012) is provided with an instrument panel (3013), and the other side of the sleeve body shell (302) is provided with a sleeve head output valve pipe (3014) installed in sleeve.

6. A wellhead apparatus for gas production according to claim 4, characterised in that: The tracheal head sealing kit (4) comprises a sealing gasket (401), a tracheal flange pipe shell (402), a tracheal bolt (403), a tracheal shaft seal strip (404), a tracheal rubber seal ring (405), a threaded inner shell (406), a lower arc insertion ring (407), a first inner rubber ring (408), a rubber ring inner shell (409), a lower support base (4010), a circular rubber ring (4011), an arc slot rubber ring seat (4012), an insertion ring seat (4013), a movable handle (4014), an insertion head (4015), an inner rubber ring shell (4016), a tracheal one-way valve pipe (4017), a tracheal two-way valve pipe (4018), and a two-way valve pipe pressure gauge (4019). The sealing gasket (401) is arranged above the sleeve flange (301), the tracheal flange pipe shell (402) is arranged above the sealing gasket (401), the tracheal bolt (403) is arranged above the outer side of the tracheal flange pipe shell (402), the tracheal shaft seal strip (404) is arranged in sleeve at the inner side of both ends of the tracheal flange pipe shell (402), the tracheal rubber seal ring (405) is arranged at the inner end of the tracheal shaft seal strip (404), the tracheal one-way valve pipe (4017) is arranged in sleeve at one side of the tracheal flange pipe shell (402), the tracheal two-way valve pipe (4018) is arranged in sleeve at the other side of the tracheal flange pipe shell (402), and the two-way valve pipe pressure gauge (4019) is arranged above one side of the tracheal two-way valve pipe (4018).

7. A wellhead apparatus for gas production according to claim 6, characterised in that: The inner side of the air pipe flange pipe shell (402) is provided with a threaded inner shell (406) which is sleeved with threads, and the bottom end of the threaded inner shell (406) is provided with a lower arc insertion ring (407). The lower inner side of the threaded inner shell (406) is provided with a first inner rubber ring (408), and the upper side of the first inner rubber ring (408) is provided with a rubber ring inner shell (409). The lower inner side of the rubber ring inner shell (409) is provided with a lower supporting base (4010), and the upper side of the lower supporting base (4010) is provided with a circular ring rubber ring (4011). The upper side of the circular ring rubber ring (4011) is provided with an arc groove rubber ring seat (4012), and the upper inner side of the arc groove rubber ring seat (4012) is provided with a receiving ring seat (4013). The upper ends of the receiving ring seat (4013) are provided with movable handles (4014), and the inner side of the receiving ring seat (4013) is connected with an inner rubber ring shell (4016) through a plug (4015).

8. A control system for a wellhead apparatus for gas production as claimed in any one of claims 6 to 7, characterised in that: When in use, the mine surface base plate (101) is laid on the gas mine, so that the inner side of the mine surface base plate (101) pours the lower sealing channel (102), the upper bottom rubber ring (103) is arranged on the inner side of the two ends of the lower sealing channel (102), the gas mine pipe (104) is clamped, the gas mine pipe (104) is connected inside the gas mine, the upper outer side of the gas mine pipe (104) is screwed with the mine pipe threaded rubber ring (105), the shock lifting (108) and the bolt base pad (109) are bolted on the upper four sides of the mine surface base plate (101), the channel block (107) is bolted with the lower sealing bolt disc (106) on the gas mine pipe (104), then the symmetric bracket (201) at the two ends of the bottom support plate (202) is bolted on the upper two ends of the channel block (107), so as to achieve the effect of bolted splicing, the bottom support plate (202) seals the gas mine pipe (104) with the upper sealing channel (203), the elevated frame (204) effectively lifts the groove type supporting ring (205), and the sealing rubber ring (206) is bolted and spliced with the sleeve pipe sealing part (3), when further splicing is needed, the sleeve pipe flange (301) is used to cooperate with the sleeve pipe body shell (302) and the sleeve pipe bolt (303) to bolt splice, then the sleeve pipe flange (301) is bolted on the side of the groove type supporting ring (205) and the sealing rubber ring (206), the hexagonal bolt (304) at the two ends of the sleeve pipe flange (301) outputs power to drive the output end to run, and after the screw runs, the sealing shaft seal seat (305) and the spline sleeve strip (306) are rotated to drive the sleeve rubber outer ring (307) and the sleeve rubber inner ring (308) to tightly lock and fit the end of the gas mine pipe (104), and the thread groove on the inner side of the sleeve pipe body shell (302) is screwed with the spiral protruding part of the gas mine pipe (104). When pressure measurement is needed, the pressure measuring rod (3010) on the sleeve pipe pressure measuring cabin (309) is used to cooperate with the pressure measuring ball plug (3011) to measure the pressure of the internal pipeline to achieve the effect of contact pressure, and the instrument panel (3013) on the external sensor (3012) effectively displays the pressure in the pipeline. When the lower output is needed, the sleeve head output valve pipe (3014) is used to open to make the internal natural gas output. When sealing is needed, the gas pipe flange pipe shell (402) is used to cooperate with the gas pipe bolt (403) to bolt connect on the side of the sealing pad (401), the screw inner shell (406) is screwed with the lower arc insertion ring (407) to run inside the gas pipe flange pipe shell (402), the lower arc insertion ring (407) is inserted and sealed in the top end of the gas mine pipe (104), the first inner rubber ring (408) is arranged on the lower inner side of the screw inner shell (406),And make the rubber ring inner shell (409) to make the lower toki base (4010) fit the upper circular rubber ring (4011) sleeve in the inner edge side of the threaded inner shell (406), and make the movable handle (4014) fit the upper inserted ring seat (4013) inserted in the upper of the arc slot rubber ring seat (4012), so that the inner rubber ring shell (4016) is inserted to achieve the effect of effective sealing transmission, which can effectively prevent air leakage. When the gas pipe head sealing sleeve (4) needs to be output, the gas pipe flange pipe shell (402) is provided with gas pipe outlet valve pipe (4017) and gas pipe outlet valve pipe (4018) at both ends to open and output to achieve the effect of natural gas output. According to the pressure measurement effect of the two outlet valve pipe pressure gauge (4019), when the pipeline needs to be output, the output power is operated by using the strong hydraulic telescopic frame (508) below the inner lining valve shell (506) on the connecting top frame (507), so that the semi-arc plug (509) is inside the inner lining valve shell (506) to achieve slow running, so that the gas flow is input to the inner lining valve shell (506).

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