Applicable wellhead device applied to field of gas production and control system of applicable wellhead device

Abstract

The invention discloses an applicable wellhead device applied to the field of gas production and a control system of the applicable wellhead device, the applicable wellhead device comprises a casing head structure, a pipeline pressure measuring assembly, a pipeline sealing assembly, a blowout prevention component and an output adjusting mechanism, and a bolt on the top side of a casing head seat on the casing head structure is connected with a convex strip circular plate on the pipeline pressure measuring assembly in a sleeving manner. According to the device, a semi-sealing pressing block and a full-sealing pressing block of a blowout prevention component are mainly utilized to form a full-sealing structure after operation, the formed sealing structure is matched with a wing valve installed on an upper pipeline sealing assembly, adaptive communication is conducted through an output valve pipe at the output end of a four-cavity shell, and therefore the blowout prevention effect is achieved. In the communication process, a handle is flexibly adjusted according to the condition of a circuit to drive a meshing gear set to operate, so that a first threaded rod, an upper plug, a second threaded rod and a lower plug adjust an output circuit after output operation, and the output circuit and a maintenance circuit do not interfere with each other in respective work; therefore, the normal operation efficiency state of the equipment is ensured.

Description

Technical Field

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

[0002] The gas wellhead device is generally called the gas tree, which is the common name for the surface wellhead device of a gas well. It connects the gas well tubing, casing and surface process equipment. Because these wellhead devices are composed of multiple pipes that intersect on the ground, they resemble trees, hence the name. The gas tree is the core device of the gas well production system. After well completion, it is used to control the gas well flow rate and wellhead pressure, and to perform on / off operations and downhole operations. The gas tree is mainly composed of main valves, wing valves, throttle valves, pressure gauges and pipelines.

[0003] Existing wellhead devices used in gas production primarily rely on the coordinated regulation of a main valve, wing valve, and throttle valve to ensure that high-pressure fluid flows safely and controllably into the surface gathering and transportation system, preventing blowouts or well leakage. The throttle valve also controls fluid flow rate and production to meet the needs of different production stages. However, in existing technologies, when one or more lines need emergency repairs during operation, the entire equipment must be shut down, which affects normal production and operation for a period of time and makes it difficult to flexibly adjust the lines as needed. Therefore, we propose a suitable wellhead device and its control system for gas production to solve these problems. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a suitable wellhead device and its control system for gas production. This device and control system primarily utilizes the semi-sealing and fully sealing blocks of the blowout preventer to form a fully enclosed structure after operation. This enclosed structure, in conjunction with the wing valve installed on the pipeline sealing assembly, allows for adaptive connection through the output valve pipe at the output end of the four-chamber shell. During the connection process, the handle is flexibly adjusted according to the line conditions to drive the meshing gear set, allowing the first threaded rod, upper plug, second threaded rod, and lower plug to pass through the output line and adjust the output line accordingly. This ensures that the output line and maintenance line do not interfere with each other during their respective operations, thereby guaranteeing the normal operating efficiency of the equipment.

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

[0006] A suitable wellhead device and its control system for gas production include a casing head structure, a pipeline pressure testing assembly, a pipeline sealing assembly, a blowout preventer, and an output adjustment mechanism. The casing head seat on the casing head structure is bolted to the top side of a protruding circular plate on the pipeline pressure testing assembly. The pressure testing duct on the pipeline pressure testing assembly is bolted to the top of a sealing duct on the pipeline sealing assembly. The top of the sealing duct is bolted to a bearing housing on the blowout preventer. The top of the bearing housing is bolted to a reinforcing shell on the output adjustment mechanism.

[0007] The output adjustment mechanism also includes a four-chamber shell and duct blocks. The inner side of the reinforcing shell is provided with a four-chamber shell, and the four-chamber shell has a four-circularly distributed chamber structure. Each chamber of the four-chamber shell is provided with a set of duct blocks.

[0008] As a further technical solution, the sleeve head structure also includes a reinforced concrete base, a cylindrical sleeve, an inner rubber liner, a bottom flange, and a semi-circular clamp. The bottom flange is provided at the bottom end of the sleeve head base, and a bolt-fitted semi-circular clamp is provided on the inner side of the bottom flange. The cylindrical sleeve is provided on the inner side of the semi-circular clamp, and the reinforced concrete base is provided on the outer side of the cylindrical sleeve. The inner rubber liner is provided on the inner side of the cylindrical sleeve.

[0009] As a further technical solution, the sleeve head structure also includes a bolt bracket, a shock absorber, and an annular rubber ring. The bolt bracket is provided on the outer side of the sleeve head seat, and the shock absorber is provided below the outer end of the bolt bracket. An annular rubber ring is provided on the upper inner side of the sleeve head seat.

[0010] As a further technical solution, the pipeline pressure testing assembly also includes a spiral pressure head, an annular rubber sleeve, a drain valve pipe, a pressure testing chamber, a pressure testing contact head, and a pressure gauge. The spiral pressure head is sleeved on the inner side of the raised edge of the pressure testing duct. The output end of the spiral pressure head is provided with an annular rubber sleeve that is sleeved on the inner side of both ends of the pressure testing duct. A drain valve pipe is bolted to one side of the middle of the pressure testing duct, and a pressure testing chamber is bolted to the other side of the middle of the pressure testing duct. A pressure testing contact head is provided on the inner side of one end of the pressure testing chamber, and a pressure gauge is provided on the upper part of the outer end of the pressure testing chamber.

[0011] As a further technical solution, the pipeline sealing assembly also includes a mounting head, a lower sleeve, a connecting sleeve, and multiple layers of rubber rings. The inner side of the sealing duct is provided with a mounting head that is inserted into the top of the inner lining tube. The lower sleeve is sleeved and installed on the inner side below the mounting head, and the connecting sleeve is inserted and installed on the top side of the lower sleeve. Multiple layers of rubber rings are provided on the outer sides of both the lower sleeve and the connecting sleeve.

[0012] As a further technical solution, the pipeline sealing assembly also includes a threaded rubber head, a plug-in groove head, a bolt ring cover, a sliding frame, a gravity plug head, and a clutch sleeve head. The inner top side of the connecting sleeve head is threadedly fitted with the plug-in groove head through the threaded rubber head. The top end of the plug-in groove head is bolted with a bolt ring cover. A sliding frame is provided on the lower inner side of the bolt ring cover head, and a gravity plug head is slidably connected on the sliding frame head. A clutch sleeve head is provided at the bottom end of the sliding frame head.

[0013] As a further technical solution, the blowout preventer also includes a connecting side box, an internal ring seat, a rubber sleeve, and a protective plate. The connecting side box is provided on the outer side of the bearing housing, and the protective plate is bolted to the outer side of the bearing housing. Two sets of internal ring seats are provided on the inner side of the bearing housing, and the rubber sleeve is sleeved on the inner side of the internal ring seat.

[0014] As a further technical solution, the blowout preventer also includes a spline guide groove, a sealing pressure plate, a push rod, a semi-sealing pressure block, and a fully sealing pressure block. The spline guide groove is provided on the inner side of the outer end of the connecting side box, and a sealing pressure plate is provided at the output end of the spline guide groove. A push rod is provided on the inner side of the sealing pressure plate, and a semi-sealing pressure block is provided at the lower output end of the push rod, and a fully sealing pressure block is provided at the upper output end of the push rod.

[0015] As a further technical solution, the output adjustment mechanism also includes a top base, a handle, a meshing gear set, a first threaded rod, an upper plug, a second threaded rod, a lower plug, and an output valve pipe. The top of the reinforcing shell is provided with a top base, and four sets of handles arranged in a ring are provided above the top base. The output end of the handle is provided with a meshing gear set, and one set of output ends of the meshing gear set is provided with a first threaded rod. The bottom end of the first threaded rod is provided with an upper plug. The other set of output ends of the meshing gear set is provided with a second threaded rod, and the inner end of the second threaded rod is provided with a lower plug. The output end of the four-chamber shell is bolted with four sets of output valve pipes.

[0016] As a further technical solution, the equipment is first installed at the relevant gas extraction location. A steel-concrete base and cylindrical casing are installed at the gas field outlet. After installation, an inner rubber hose is attached to the inner wall of the cylindrical casing. Following this, the bottom flange and semi-circular clamp are bolted tightly together, and a casing head seat is installed on the top side of the bottom flange. Both ends of the casing head seat are bolted to the top of the shock absorber to achieve vibration damping. An annular rubber ring is installed on the inner side of the top of the casing head seat to seal the mounting of the raised circular plate and pressure measuring duct. This allows for proper gas flow. The pressure testing contact head on the pressure chamber, in conjunction with the sensor, transmits the internal air pressure data to a pressure gauge for display, thus indicating the equipment's operating status. The drain valve pipe discharges extracted impurities and dirt as needed, improving the cleanliness of the equipment's output. A mounting head, installed on the inner wall of the sealed duct, is inserted and fixed to the top side of the inner lining hose. A lower sleeve is installed below the mounting head on the inner side, allowing the lower sleeve to align with the slot of the connecting sleeve. Multiple layers of parallel-distributed rubber rings are used for tightening, achieving a seal. After sealing, during equipment operation, the threaded rubber head and the insertion slot... The head bolt is installed at the top of the connecting sleeve. During operation, the strong air pressure pushes the gravity plug upward above the sliding frame, causing it to move out of the inner groove of the clutch sleeve, thus achieving the effect of outputting airflow. After the sealing duct is installed, the multi-cavity structure formed by the connecting side box and the built-in ring seat is installed at the top of the sealing duct, and is installed with a protective plate for easy disassembly and reinforcement. This facilitates subsequent emergency braking by connecting the built-in ring seat and the rubber sleeve. When the equipment sprays during operation, the operator uses the spline guide groove for transport, thus allowing the spline guide groove to output the transported air. The sealing pressure plate, driven by the spiral, is pushed by the push rod, which, together with the upper half-sealing block and the full-sealing block, closes the rubber sleeve to prevent spraying. When material needs to be output, the airflow enters the interior of the four-chamber shell through the rubber sleeve. After manual output by the operator, the handle is activated, which drives the meshing gear set to drive the spiral transmission of the first and second threaded rods. This causes the upper and lower plugs to engage in a bidirectional clutch to form a passage on the duct block, allowing the airflow to finally be output through the output valve at the output end of the four-chamber shell to achieve the desired effect.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The invention device mainly utilizes the semi-sealing and fully-sealing blocks of the blowout preventer to form a fully enclosed structure after operation. This enclosed structure, together with the wing valve installed on the pipeline sealing assembly, allows for adaptive connection through the output valve pipe at the output end of the four-chamber shell. During the connection process, the handle is flexibly adjusted according to the line conditions to drive the meshing gear set, allowing the first threaded rod, upper plug, second threaded rod, and lower plug to pass through the output line and adjust the output line. This ensures that the output line and the maintenance line do not interfere with each other during their respective operations, thereby guaranteeing the normal operation and efficiency of the equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a suitable wellhead device and its control system for gas production applications.

[0020] Figure 2 This is a schematic diagram of the structure viewed from below in this invention;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure in this invention;

[0022] Figure 4 This is a schematic diagram of the pipeline pressure testing assembly in this invention;

[0023] Figure 5 This is a schematic diagram of the pipeline sealing assembly in this invention;

[0024] Figure 6 This is a schematic diagram of the structure of the lower sleeve and the connecting sleeve in this invention;

[0025] Figure 7 This is a schematic diagram of the structure of the blowout preventer component in this invention;

[0026] Figure 8 This is a schematic diagram of the output adjustment mechanism in this invention;

[0027] Figure 9 This is a schematic diagram of the four-chamber shell structure in this invention;

[0028] Figure 10 This is a schematic diagram of the structure of the second threaded rod and the lower plug in this invention.

[0029] In the diagram: 1. Sleeve head structure; 101. Reinforced concrete base; 102. Cylindrical sleeve; 103. Inner rubber lining; 104. Bottom flange; 105. Semi-arc clamp; 106. Sleeve head seat; 107. Bolt bracket; 108. Shock absorber; 109. Annular rubber ring; 2. Pipeline pressure testing assembly; 201. Raised rib plate; 202. Pressure testing duct; 203. Spiral pressure head; 204. Annular rubber sleeve; 205. Drain valve pipe; 206. Pressure testing chamber; 207. Pressure testing contact head; 208. Pressure gauge; 3. Pipeline sealing assembly; 301. Sealing duct; 302. Mounting head; 303. Lower sleeve; 304. Connecting sleeve; 305. Multi-layer rubber ring; 306. Threaded rubber head; 307. Insertion groove 308. Bolt ring cap; 309. Sliding frame; 3010. Gravity plug head; 3011. Clutch sleeve head; 4. Blowout preventer; 401. Bearing housing; 402. Connecting side box; 403. Internal ring seat; 404. Rubber sleeve; 405. Protective plate; 406. Spline guide groove; 407. Sealing pressure plate; 408. Push rod; 409. Semi-sealing pressure block; 4010. Full-sealing pressure block; 5. Output adjustment mechanism; 501. Reinforcing shell; 502. Four-chamber shell; 503. Duct block; 504. Top base; 505. Handle; 506. Meshing gear set; 507. First threaded rod; 508. Upper plug; 509. Second threaded rod; 5010. Lower plug; 5011. Output valve pipe. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] 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.

[0033] Please see Figure 1-10 In this embodiment of the invention, a suitable wellhead device and its control system for gas production include a casing head structure 1, a pipeline pressure measuring component 2, a pipeline sealing component 3, a blowout preventer 4, and an output adjustment mechanism 5. The casing head seat 106 on the casing head structure 1 is bolted to the top side of the convex circular plate 201 on the pipeline pressure measuring component 2. The pressure measuring duct 202 on the pipeline pressure measuring component 2 is bolted to the top end of the sealing duct 301 on the pipeline sealing component 3. The top end of the sealing duct 301 is bolted to the bearing shell 401 on the blowout preventer 4. The top end of the bearing shell 401 is bolted to the reinforcing shell 501 on the output adjustment mechanism 5.

[0034] The output adjustment mechanism 5 also includes a four-chamber shell 502 and a duct block 503. The inner side of the reinforcing shell 501 is provided with the four-chamber shell 502, and the four-chamber shell 502 has a four-ring distributed chamber structure. Each chamber of the four-chamber shell 502 is provided with a set of duct blocks 503.

[0035] The sleeve head structure 1 also includes a reinforced concrete base 101, a cylindrical sleeve 102, an inner rubber-lined hose 103, a bottom flange 104, and a semi-circular clamp 105. The bottom flange 104 is provided at the bottom end of the sleeve head seat 106, and a bolt-fitted semi-circular clamp 105 is provided on the inner side of the bottom flange 104. The cylindrical sleeve 102 is provided on the inner side of the semi-circular clamp 105, and the reinforced concrete base 101 is provided on the outer side of the cylindrical sleeve 102. The inner rubber-lined hose 103 is provided on the inner side of the cylindrical sleeve 102.

[0036] In an embodiment of the present invention, the equipment is installed at a relevant gas extraction location. A steel-concrete base 101 with a steel-concrete structure and a cylindrical casing 102 are installed at the outlet end of the gas field. After installation, the inner lining tube 103 is attached to the inner wall of the cylindrical casing 102. After attachment, the bottom flange 104 and the semi-arc clamp 105 are bolted tightly connected so that the casing head seat 106 can be installed on the top side of the bottom flange 104.

[0037] The sleeve head structure 1 also includes a bolt bracket 107, a shock absorber 108, and an annular rubber ring 109. The bolt bracket 107 is provided on the outer side of the sleeve head seat 106, and the shock absorber 108 is provided below the outer end of the bolt bracket 107. The annular rubber ring 109 is provided on the upper inner side of the sleeve head seat 106.

[0038] In an embodiment of the present invention, the two ends of the sleeve head seat 106 are bolted to the top side of the shock absorber 108 by bolt bracket 107 to achieve the effect of shock absorption, and the annular rubber ring 109 is provided on the inner side of the top of the sleeve head seat 106 to achieve the effect of sealing the upper convex plate 201 and the pressure measuring duct 202.

[0039] The pipeline pressure testing assembly 2 also includes a spiral pressure head 203, an annular rubber sleeve 204, a drain valve pipe 205, a pressure testing chamber 206, a pressure testing contact head 207, and a pressure gauge 208. The spiral pressure head 203 is sleeved on the inner side of the protruding edge of the pressure testing duct 202. The output end of the spiral pressure head 203 is provided with an annular rubber sleeve 204 sleeved on the inner side of both ends of the pressure testing duct 202. The drain valve pipe 205 is bolted to one side of the middle of the pressure testing duct 202, and the pressure testing chamber 206 is bolted to the other side of the middle of the pressure testing duct 202. The pressure testing contact head 207 is provided on the inner side of one end of the pressure testing chamber 206, and the pressure gauge 208 is provided on the upper part of the outer end of the pressure testing chamber 206.

[0040] In an embodiment of the present invention, the airflow causes the pressure contact 207 on the pressure chamber 206 to work with the sensor to transmit the internal airflow pressure data to the pressure gauge 208 for display, thereby showing the operating status of the equipment. The drain valve 205 discharges the extracted impurities and dirt as needed to improve the cleanliness of the equipment output.

[0041] The pipeline sealing assembly 3 also includes a mounting head 302, a lower sleeve head 303, a connecting sleeve head 304, and a multi-layer rubber ring 305. The inner side of the sealing duct 301 is provided with a mounting head 302 that is inserted into the top of the inner lining rubber tube 103. The lower sleeve head 303 is sleeved and installed on the lower inner side of the mounting head 302, and the connecting sleeve head 304 is inserted and installed on the top side of the lower sleeve head 303. The outer sides of both the lower sleeve head 303 and the connecting sleeve head 304 are provided with multi-layer rubber rings 305.

[0042] In an embodiment of the present invention, the sealing duct 301 is fitted with the mounting head 302 installed on the inner wall and fixed to the top side of the inner lining tube 103, so that the lower sleeve head 303 is installed on the inner side below the mounting head 302, thereby allowing the lower sleeve head 303 to mate with the slot of the connecting sleeve head 304, and is tightened by multiple layers of parallel distributed multi-layer rubber rings 305 to achieve a sealing effect.

[0043] The pipeline sealing assembly 3 also includes a threaded rubber head 306, a plug groove head 307, a bolt ring cap 308, a sliding frame 309, a gravity plug head 3010, and a clutch sleeve 3011. The inner top side of the connecting sleeve 304 is threadedly connected to the plug groove head 307 through the threaded rubber head 306. The top of the plug groove head 307 is bolted to the bolt ring cap 308. The sliding frame 309 is provided on the lower inner side of the bolt ring cap 308, and the gravity plug head 3010 is slidably connected on the sliding frame 309. The clutch sleeve 3011 is provided at the bottom of the sliding frame 309.

[0044] In an embodiment of the present invention, after sealing, during the operation of the equipment, the threaded rubber head 306 and the plug slot head 307 are bolted to the top of the connecting sleeve head 304. In this way, during operation, the strong air pressure pushes the gravity plug head 3010 to slide upward above the sliding frame 309, so that the gravity plug head 3010 moves out of the inner groove of the clutch sleeve head 3011, thereby achieving the effect of outputting airflow.

[0045] The blowout preventer 4 also includes a connecting side box 402, an internal ring seat 403, a rubber sleeve 404, and a protective plate 405. The connecting side box 402 is provided on the outer side of the bearing housing 401, and the protective plate 405 is bolted to the outer side of the bearing housing 401. Two sets of internal ring seats 403 are provided on the inner side of the bearing housing 401, and the rubber sleeve 404 is sleeved and installed on the inner side of the internal ring seat 403.

[0046] In an embodiment of the present invention, after the sealed duct 301 is installed, the multi-cavity structure formed by the connecting side box 402 and the built-in ring seat 403 is installed at the top of the sealed duct 301, and is installed with the protective plate 405 for easy disassembly and reinforcement, so that the built-in ring seat 403 and the rubber sleeve 404 can be used for subsequent emergency braking.

[0047] The blowout preventer 4 also includes a spline guide groove 406, a sealing pressure plate 407, a push rod 408, a semi-sealing pressure block 409, and a fully sealing pressure block 4010. The spline guide groove 406 is provided on the inner side of the outer end of the connecting side box 402, and the sealing pressure plate 407 is provided at the output end of the spline guide groove 406. The push rod 408 is provided on the inner side of the sealing pressure plate 407, and the semi-sealing pressure block 409 is provided at the lower output end of the push rod 408, and the fully sealing pressure block 4010 is provided at the upper output end of the push rod 408.

[0048] In an embodiment of the present invention, when the equipment generates a spraying phenomenon, the operator uses the spline guide groove 406 for transmission and operation, so that the spline guide groove 406 drives the spiral sealing pressure plate 407 to push after it outputs and runs. After the sealing pressure plate 407 is pushed, the push rod 408, together with the upper half-sealing pressure block 409 and the full-sealing pressure block 4010, closes the rubber sleeve 404, thereby achieving the effect of preventing spraying.

[0049] The output adjustment mechanism 5 also includes a top base 504, a handle 505, a meshing gear set 506, a first threaded rod 507, an upper plug 508, a second threaded rod 509, a lower plug 5010, and an output valve pipe 5011. The top of the reinforcing shell 501 is provided with a top base 504, and four sets of handles 505 arranged in a ring are provided above the top base 504. The output end of the handle 505 is provided with a meshing gear set 506, and one set of output ends of the meshing gear set 506 is provided with a first threaded rod 507. The bottom end of the first threaded rod 507 is provided with an upper plug 508, and the other set of output ends of the meshing gear set 506 is provided with a second threaded rod 509. The inner end of the second threaded rod 509 is provided with a lower plug 5010. The output ends of the four-chamber shell 502 are bolted with four sets of output valve pipes 5011.

[0050] In an embodiment of the present invention, when material needs to be output, the airflow enters the interior of the four-chamber shell 502 through the rubber sleeve 404. After manual output by the operator, the handle 505 is activated, which drives the meshing gear set 506 to mesh and drive the first threaded rod 507 and the second threaded rod 509 to spirally transmit the material. This causes the upper plug 508 and the lower plug 5010 to engage in a bidirectional clutch to form a passage on the duct block 503. In this way, the airflow is finally output through the output valve pipe 5011 at the output end of the four-chamber shell 502 to achieve the desired effect.

[0051] The control system of this applicable wellhead device for gas production is first installed. The equipment is installed at the relevant gas production location, using a steel-concrete base 101 and a cylindrical casing 102, set at the outlet end of the gas field. After installation, the inner wall of the cylindrical casing 102 is attached to the inner wall of the inner lining tubing 103. After attachment, the bottom flange 104 and the semi-circular clamp 105 are bolted tightly together, and the casing head seat 106 is installed on the top side of the bottom flange 104. The two ends of the casing head seat 106 are bolted to the top side of the shock absorber 108 through bolt brackets 107 to achieve the shock absorption effect. An annular rubber ring 109 is set on the inner side of the top of the casing head seat 106 to achieve a seal. The convex plate 201 and pressure measuring tube are installed. The effect of channel 202 is that, through the airflow, the pressure contact head 207 on the pressure measuring chamber 206, in conjunction with the sensor, transmits the internal airflow pressure data to the pressure gauge 208 for display, thereby indicating the equipment's operating status. The drain valve pipe 205 discharges extracted impurities and dirt as needed, improving the cleanliness of the equipment's output. The sealing duct 301, in conjunction with the inner wall, has a mounting head 302 inserted and fixed to the top side of the inner lining hose 103. A lower sleeve head 303 is installed on the inner side below the mounting head 302, allowing the lower sleeve head 303 to align with the slot of the connecting sleeve head 304. Multiple layers of parallel-distributed rubber rings 305 are then used to tighten the seal, achieving a sealing effect. After sealing, the equipment operates... During the process, the threaded rubber head 306 and the insertion slot head 307 are bolted to the top of the connecting sleeve head 304. This allows the strong air pressure to push the gravity plug head 3010 upwards above the sliding frame 309, causing it to move out of the inner groove of the clutch sleeve head 3011, thus achieving the effect of airflow output. After the sealing duct 301 is installed, the multi-cavity structure formed by the connecting side box 402 and the built-in ring seat 403 is installed at the top of the sealing duct 301, and is installed with the protective plate 405 for easy disassembly and structural reinforcement. This facilitates subsequent emergency braking of the built-in ring seat 403 and the rubber sleeve 404. When the equipment sprays water during operation, the operator uses a spray nozzle... The keyway guide 406 operates for transmission, which in turn drives the spiral sealing pressure plate 407 to move. The sealing pressure plate 407 then pushes the push rod 408, in conjunction with the upper semi-sealing block 409 and the full-sealing block 4010, to close the rubber sleeve 404, thus preventing spraying. When material needs to be output, the airflow passes through the rubber sleeve 404 and enters the interior of the four-chamber shell 502. After manual output by the operator, the handle 505 drives the meshing gear set 506 to engage and transmit power, thereby driving the spiral transmission of the first threaded rod 507 and the second threaded rod 509. This causes the upper plug 508 and the lower plug 5010 to engage bidirectionally, forming a passage on the duct block 503.This ensures that the airflow is ultimately output through the output valve pipe 5011 at the output end of the four-chamber shell 502 to achieve the desired effect.

[0052] 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.

[0053] 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 suitable wellhead device for gas production, comprising a casing head structure (1), a pipeline pressure testing assembly (2), a pipeline sealing assembly (3), a blowout preventer (4), and an output adjustment mechanism (5), characterized in that: The top side of the sleeve head seat (106) on the sleeve head structure (1) is bolted to the convex circular plate (201) on the pipeline pressure measuring assembly (2). The top end of the pressure measuring duct (202) on the pipeline pressure measuring assembly (2) is bolted to the sealing duct (301) on the pipeline sealing assembly (3). The top end of the sealing duct (301) is bolted to the bearing shell (401) on the blowout preventer (4). The top end of the bearing shell (401) is bolted to the reinforcing shell (501) on the output adjustment mechanism (5). The output adjustment mechanism (5) also includes a four-chamber shell (502) and a duct block (503). The inner side of the reinforcing shell (501) is provided with a four-chamber shell (502), and the four-chamber shell (502) has a four-chamber structure distributed in a ring. Each chamber of the four-chamber shell (502) is provided with a set of duct blocks (503).

2. The applicable wellhead device for gas production according to claim 1, characterized in that: The sleeve head structure (1) further includes a reinforced concrete base (101), a cylindrical sleeve (102), an inner rubber lining (103), a bottom flange (104), and a semi-arc clamp (105). The bottom end of the sleeve head seat (106) is provided with a bottom flange (104), and the inner side of the bottom flange (104) is provided with a bolt-fitted semi-arc clamp (105). The inner side of the semi-arc clamp (105) is provided with a cylindrical sleeve (102), and the outer side of the cylindrical sleeve (102) is provided with a reinforced concrete base (101). The inner side of the cylindrical sleeve (102) is provided with an inner rubber lining (103).

3. The applicable wellhead device for gas production according to claim 2, characterized in that: The sleeve head structure (1) also includes a bolt bracket (107), a shock absorber (108) and an annular rubber ring (109). The bolt bracket (107) is provided on the outer side of the sleeve head seat (106), and the shock absorber (108) is provided below the outer end of the bolt bracket (107). The annular rubber ring (109) is provided on the inner side above the sleeve head seat (106).

4. A suitable wellhead device for gas production according to claim 1, characterized in that: The pipeline pressure testing assembly (2) also includes a spiral pressure head (203), an annular rubber sleeve (204), a drain valve pipe (205), a pressure testing chamber (206), a pressure testing contact head (207), and a pressure gauge (208). The spiral pressure head (203) is sleeved on the inner side of the protruding edge of the pressure testing duct (202). The output end of the spiral pressure head (203) is provided with an annular rubber sleeve (204) sleeved on the inner side of both ends of the pressure testing duct (202). The drain valve pipe (205) is bolted to one side of the middle of the pressure testing duct (202). The pressure testing chamber (206) is bolted to the other side of the middle of the pressure testing duct (202). A pressure testing contact head (207) is provided on the inner side of one end of the pressure testing chamber (206). A pressure gauge (208) is provided above the outer end of the pressure testing chamber (206).

5. A suitable wellhead device for gas production according to claim 1, characterized in that: The pipeline sealing assembly (3) also includes a mounting head (302), a lower sleeve (303), a connecting sleeve (304), and a multi-layer rubber ring (305). The inner side of the sealing duct (301) is provided with a mounting head (302) inserted into the top of the inner lining tube (103). The lower sleeve (303) is sleeved and installed on the lower inner side of the mounting head (302), and the connecting sleeve (304) is inserted and installed on the top side of the lower sleeve (303). The outer sides of the lower sleeve (303) and the connecting sleeve (304) are both provided with multi-layer rubber rings (305).

6. A suitable wellhead device for gas production according to claim 5, characterized in that: The pipeline sealing assembly (3) also includes a threaded rubber head (306), a plug groove head (307), a bolt ring cap (308), a sliding frame (309), a gravity plug head (3010), and a clutch sleeve (3011). The inner top side of the connecting sleeve (304) is threadedly connected to the plug groove head (307) through the threaded rubber head (306). The top end of the plug groove head (307) is bolted to the bolt ring cap (308). The sliding frame (309) is provided on the lower inner side of the bolt ring cap (308), and the gravity plug head (3010) is slidably connected on the sliding frame (309). The clutch sleeve (3011) is provided at the bottom end of the sliding frame (309).

7. A suitable wellhead device for gas production according to claim 1, characterized in that: The blowout preventer (4) also includes a connecting side box (402), an internal ring seat (403), a rubber sleeve (404), and a protective plate (405). The connecting side box (402) is provided on the outer side of the bearing shell (401), and the protective plate (405) is bolted to the outer side of the bearing shell (401). Two sets of internal ring seats (403) are provided on the inner side of the bearing shell (401), and the rubber sleeve (404) is sleeved on the inner side of the internal ring seat (403).

8. A suitable wellhead device for gas production according to claim 7, characterized in that: The blowout preventer (4) also includes a spline guide groove (406), a sealing pressure plate (407), a push rod (408), a semi-sealing pressure block (409), and a fully sealing pressure block (4010). The inner side of the outer end of the connecting side box (402) is provided with a spline guide groove (406), and the output end of the spline guide groove (406) is provided with a sealing pressure plate (407). The inner side of the sealing pressure plate (407) is provided with a push rod (408), and the lower output end of the push rod (408) is provided with a semi-sealing pressure block (409), and the upper output end of the push rod (408) is provided with a fully sealing pressure block (4010).

9. A suitable wellhead device for gas production according to claim 1, characterized in that: The output adjustment mechanism (5) further includes a top base (504), a handle (505), a meshing gear set (506), a first threaded rod (507), an upper plug (508), a second threaded rod (509), a lower plug (5010), and an output valve pipe (5011). The top of the reinforcing shell (501) is provided with a top base (504), and four sets of handles (505) arranged in a ring are provided above the top base (504). The output end of the handle (505) is provided with... The meshing gear set (506) has a first threaded rod (507) at one output end, an upper plug (508) at the bottom end of the first threaded rod (507), a second threaded rod (509) at the other output end of the meshing gear set (506), and a lower plug (5010) above the inner end of the second threaded rod (509). The output end of the four-chamber shell (502) is bolted with four sets of output valve pipes (5011).

10. A control system for a suitable wellhead device applied in the field of gas production, using a suitable wellhead device for gas production as described in any one of claims 1-9, characterized in that: First, the equipment is installed at the relevant gas extraction location. A steel-concrete base (101) and a cylindrical casing (102) of steel-concrete structure are installed at the outlet end of the gas field. After installation, the inner lining hose (103) is attached to the inner wall of the cylindrical casing (102). After attachment, the bottom flange (104) and the semi-circular clamp (105) are bolted tightly together. Then, the casing head seat (106) is installed on the top side of the bottom flange (104). The two ends of the casing head seat (106) are bolted to the top side of the shock absorber (108) through bolt brackets (107) to achieve the effect of shock absorption. An annular rubber ring (109) is set on the inner side of the top of the casing head seat (106) to achieve a sealing installation. The effect of the circular plate (201) and the pressure measuring duct (202) is that, through the airflow, the pressure measuring contact head (207) on the pressure measuring chamber (206) works with the sensor to transmit the internal airflow pressure data to the pressure gauge (208) for display, thereby showing the operating status of the equipment. The drain valve pipe (205) discharges the extracted impurities and dirt as needed to improve the cleanliness of the equipment output. The sealing duct (301) is fitted with the mounting head (302) installed on the inner wall and inserted and fixed to the top side of the inner lining tube (103), so that the lower sleeve head (303) is installed on the inner side below the mounting head (302), thereby allowing the lower sleeve head (303) to be aligned with the slot of the connecting sleeve head (304). The sealing effect is achieved by using multiple parallel-distributed multi-layer rubber rings (305) to tighten them. After sealing, during the operation of the equipment, the threaded rubber head (306) and the plug groove head (307) are bolted to the top of the connecting sleeve (304). During operation, the strong air pressure pushes the gravity plug (3010) to slide upward above the sliding frame (309), causing the gravity plug (3010) to move out of the inner groove of the clutch sleeve (3011), thereby achieving the effect of outputting airflow. After the sealing duct (301) is installed, the multi-cavity structure formed by the connecting side box (402) and the built-in ring seat (403) is installed at the top of the sealing duct (301), and is fitted with a protective plate ( 405) The installation is designed for easy disassembly and reinforcement, making it easier for the built-in ring seat (403) and rubber sleeve (404) to perform emergency braking. When the equipment sprays during operation, the operator uses the spline guide groove (406) for transmission, which drives the spiral sealing pressure plate (407) to push after the spline guide groove (406) outputs. After the sealing pressure plate (407) is pushed, the push rod (408) cooperates with the upper half-sealing block (409) and the full-sealing block (4010) to close the rubber sleeve (404), thereby achieving the effect of preventing spraying. When it is necessary to output materials, the airflow enters the interior of the four-chamber shell (502) through the rubber sleeve (404).After manual operation by the staff, the handle (505) is activated, driving the meshing gear set (506) to engage and transmit power. This drives the first threaded rod (507) and the second threaded rod (509) in a spiral transmission, causing the upper plug (508) and lower plug (5010) to engage in a bidirectional clutch, forming a passage on the duct block (503). This allows the airflow to ultimately be output through the output valve pipe (5011) at the output end of the four-chamber shell (502) to achieve the desired effect.

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