High-pressure gas production wellhead

Abstract

The invention relates to the technical field of gas production well mouths, and discloses a high-pressure gas production well mouth which comprises a well mouth body and a nut and further comprises an early warning mechanism arranged on the surface of the well mouth body and used for detecting whether a bolt and the nut at the flange connecting position of the well mouth body are loosened or not. The supporting mechanism is arranged on the surface of the well mouth body and used for improving the stability of the well mouth body and preventing the well mouth body from settling; the dredging mechanism is arranged on the inner wall of the well mouth body and used for cleaning impurities filtered out from the interior of the well mouth body and preventing the well mouth body from being blocked, the nut makes contact with the outer conductor and the inner conductor after displacement, at the moment, electric power on the outer conductor is transmitted to the inner conductor by the nut, and a loop is formed between the outer conductor and the warning lamp; and a worker judges the nut below which alarm lamp is loosened according to the lightening of the alarm lamp, and timely overhaul is carried out to prevent natural gas leakage.

Description

Technical Field

[0001] The invention relates to the technical field of gas production wellheads, in particular to a high-pressure gas production wellhead. Background Art

[0002] The gas wellhead is the interface between the underground gas layer and the ground equipment during the natural gas extraction process. It is the connection point between the gas well and the ground production equipment, and undertakes important functions such as regulating gas flow, pressure control, and gas distribution.

[0003] The patent with announcement number CN216588522U discloses a gas wellhead with protective function, which belongs to the field of natural gas extraction technology, including a gas wellhead base, the front and back of the gas wellhead base are symmetrically connected with manual telescopic columns, one end of the manual telescopic column is connected with a connecting strip, both sides of the connecting strip are connected with a foldable rectangular frame through a hinge, the middle part of the inner wall of the foldable rectangular frame is embedded with a filter screen, the two sides of the bottom end of the foldable rectangular frame are symmetrically welded with manual telescopic rods, the bottom ends of the two manual telescopic rods are connected by a limit strip, and the limit strip is connected to the bottom of the manual telescopic rods. Rods are welded at equal intervals in the middle of the bottom end of the position strip. This patent can protect the outer surface of the gas wellhead base through a folding, rotating, overlapping protection mechanism to prevent direct contact between external objects and the gas wellhead base, and does not hinder personnel from repairing the gas wellhead base. At the same time, it can protect the gas wellhead base and increase its service life. However, when the device is used for a long time, the bolts and nuts at the flange connection will inevitably loosen, which is prone to leakage. Therefore, a high-pressure gas wellhead is proposed to solve the above-mentioned problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a high-pressure gas production wellhead in view of the deficiencies in the above-mentioned prior art.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a high-pressure gas production wellhead, including a wellhead body and a nut, and also including: An early warning mechanism, which is arranged on the surface of the wellhead body and is used to detect whether the bolts and nuts at the flange connection of the wellhead body are loose; A support mechanism, which is arranged on the surface of the wellhead body and is used to improve the stability of the wellhead body and prevent the wellhead body from settling; A dredging mechanism, which is arranged on the inner wall of the wellhead body and is used to clean impurities filtered out from the inside of the wellhead body and prevent the wellhead body from being blocked; The early warning mechanism includes a mounting plate, an outer ring, an inner ring, an outer conductor, an inner conductor, an alarm light, a sleeve, a threaded rod and a support column, wherein the outer ring is fixedly connected to the surface of the mounting plate, the inner ring is fixedly connected to a side of the mounting plate close to the wellhead body, the outer conductor is fixedly connected to the end face of the outer ring, the inner conductor is fixedly connected to the end face of the inner ring, the alarm light is installed between the outer conductor and the inner conductor, the threaded rod is fixedly connected to the bottom of the mounting plate, the sleeve is threadedly connected to the circumferential surface of the threaded rod, and the support column is fixedly connected to the bottom of the mounting plate; The outer ring is made of conductive material, and the inner ring is made of non-conductive material; the nut is installed on the surface of the wellhead body by bolts, and the end of the support column away from the mounting plate is in contact with the surface of the wellhead body. The height of the support column is greater than the height of the nut. When the nut is displaced, it will contact the outer conductor and the inner conductor at the same time. At this time, the electricity on the outer conductor will be transferred to the inner conductor by the nut, and form a loop with the alarm light, so that the alarm light is powered on and lights up. Workers can judge which nut under the alarm light is loose by the lighting of the alarm light, and carry out maintenance in time to prevent natural gas leakage.

[0006] Preferably, the supporting mechanism comprises a pressure block, a transmission rod, a supporting plate and a guide hole, the transmission rod is slidably connected to the inner wall of the wellhead body, the pressure block is fixedly connected to the top end of the transmission rod, the support plate is rotatably connected to the inner wall of the bottom of the wellhead body, and the guide hole is provided on the surface of the supporting plate; the circumferential surface of the transmission rod is respectively provided with a non-self-locking spiral groove and a straight groove, the straight groove is located above the non-self-locking spiral groove, and the straight groove is connected to the non-self-locking spiral groove, the pressure block contacts the surface of the wellhead body, the inner wall of the support plate is provided with a card block, and the card block is located in the non-self-locking spiral groove; the supporting mechanism also comprises a movable plate, a movable rod, a guide rod, a lower filter plate, a guide groove and an upper filter plate, the movable rod is slidably connected to the inner wall of the wellhead body, the movable plate is fixedly connected to the surface of the movable rod, and the guide rod is fixedly connected On the circumferential surface of the moving rod, the lower filter plate is rotatably connected to the inner wall of the wellhead body, the upper filter plate is fixedly installed on the inner wall of the wellhead body, and the guide groove is opened at the bottom of the lower filter plate; the circumferential surface of the moving rod is sleeved with a spring 1, and the two ends of the spring 1 are respectively in contact with the moving plate and the inner wall of the wellhead body, the top circumferential surface of the guide rod is in contact with the inner wall of the guide groove, the top of the lower filter plate is in contact with the bottom of the upper filter plate, the filter holes on the surface of the lower filter plate are misaligned with the filter holes on the surface of the upper filter plate, and the filter holes on the surface of the lower filter plate are misaligned with the filter holes on the surface of the upper filter plate before the wellhead device is installed, so that the two are not connected, thereby preventing dust from entering during transportation, and when the filter holes on the surface of the lower filter plate overlap and connect with the filter holes on the surface of the upper filter plate, the impurities in the extracted natural gas can be filtered to prevent impurities from entering the wellhead device and causing it to be blocked.

[0007] Preferably, the dredging mechanism includes a rotating rod, blades, a filter plate, a slide rail and a slider; the rotating rod is rotatably connected to the inner wall of the upper filter plate, the blades are rotatably connected to the circumferential surface of the rotating rod, the filter plate is fixedly connected to the top of the blades, the slide rail is fixedly connected to the top of the filter plate, and the slider is slidably connected to the surface of the slide rail; the bottom of the slider contacts the top of the filter plate, a spring 2 is fixedly connected between the slider and the rotating rod, the circumferential surface of the rotating rod is rotatably connected to the inner wall of the lower filter plate, and the rotating rod The circumferential surface is rotatably connected to the inner wall of the filter disc, and the rotation of the blades can adjust the gas flow to avoid excessive fluctuations in the airflow, thereby allowing the pressure inside the wellhead device to be relatively quickly stabilized; the dredging mechanism also includes a push rod, a pressure rod, a limit rod, a limit plate, a rack, a connecting rod, teeth and a scraper, the push rod is fixedly connected to the side of the slider close to the second spring, the pressure rod is slidably connected to the inner wall of the rotating rod, the limit rod is fixedly connected to the top of the pressure rod, the limit plate is fixedly connected to the circumferential surface of the pressure rod, and the rack is fixedly connected At the bottom end of the pressure rod, the connecting rod is rotatably connected to the inner wall of the rotating rod, the teeth are fixedly connected to the circumferential surface of the connecting rod, the scraper is fixedly connected to the end face of the connecting rod, and the support plate is rotated to open, thereby increasing the contact area between the wellhead device and the ground, and improving the stability of the wellhead device; the scraper is in contact with the bottom of the lower filter plate, and a spring three is provided between the bottom of the limit plate and the inner wall of the rotating rod, and the spring three is used for the upward reset of the pressure rod, the inclined surface of the push rod and the top inclined surface of the pressure rod, and the circumferential surface of the push rod The scraper contacts the inner wall of the rotating rod, and the surface of the rack meshes with the surface of the teeth. The rotating scraper can scrape off the impurities attached to the bottom of the lower filter plate, and the flow rate of the lifted natural gas is relatively small, so the scraped impurities can fall off to prevent the accumulation of impurities and the blockage of the lower filter plate. Most of the impurities are soil, and the accumulated soil and impurities are agglomerated under the action of the rotating scraper, and their mass will increase significantly. When the scraped impurities fall, they will not be blown up again by the natural gas due to the agglomeration and large mass.

[0008] The present invention adopts the above technical solution, which can bring the following beneficial effects: 1. For this high-pressure gas wellhead, since the outer ring is made of conductive material and the inner ring is made of non-conductive material, electricity will be transferred from the outer ring to each outer conductor, while all the inner conductors are not powered. When the gas wellhead device is used for a long time, vibration and high pressure can easily cause the connection between the bolts and nuts to loosen, which in turn causes the nuts to move. When the nuts move, they will contact the outer and inner conductors at the same time. At this time, the electricity on the outer conductor will be transferred to the inner conductor by the nuts, and form a loop with the alarm light, making the alarm light power on and light up. Workers can judge which nut under the alarm light is loose by the lighting of the alarm light, and perform maintenance in time to prevent natural gas leakage.

[0009] 2. When installing the wellhead device of the high-pressure gas production well, the pressure block is first struck by a hammer, and the pressure block drives the transmission rod to move downward. The transmission rod drives the support plate to rotate through the spiral groove on the surface and the block on the inner wall of the support plate, so that the support plate rotates and opens, thereby increasing the contact area between the wellhead device and the ground, and improving the stability of the wellhead device. At the same time, the transmission rod is also nailed into the ground and nailed into the ground through the guide hole through the installation nail, so as to further fix the wellhead device and prevent the wellhead device from settling. At the same time, before the installation of the wellhead device, the filter holes on the surface of the lower filter plate are misaligned with the filter holes on the surface of the upper filter plate, so that the two are not connected, thereby preventing dust from entering during transportation. When the filter holes on the surface of the lower filter plate overlap and connect with the filter holes on the surface of the upper filter plate, impurities in the extracted natural gas can be filtered to prevent impurities from entering the wellhead device and causing it to be blocked.

[0010] 3. For the high-pressure gas production wellhead, the pressure will be relatively high in the initial stage of use, while the pressure will be stable in the middle stage, and the pressure will be low in the later stage, and pressure supplementation gas production is required. Therefore, when the pressure is relatively high in the early stage, the natural gas will pass through the filter plate on the lower filter plate due to the large pressure and contact the blades. The inclined blades will be driven to rotate by the circulating natural gas. At this time, the high-pressure natural gas will drive the blades to rotate at a faster speed. The rotation of the blades can adjust the gas flow and avoid excessive fluctuations in the air flow, thereby making the pressure inside the wellhead device relatively fast and stable. At the same time, the gas production wellhead reduces emissions after a fixed time, thereby reducing the flow rate of the internal natural gas, so that the natural gas drives the blades to rotate relatively slowly. At this time, the rotating scraper can scrape off the impurities attached to the bottom of the lower filter plate, and the flow rate of the increased natural gas is relatively small. Therefore, the scraped impurities can fall off to prevent the accumulation of impurities and cause the lower filter plate to be blocked. Most of the impurities are soil, and the accumulated soil and impurities are agglomerated under the action of the rotating scraper, and their mass will increase significantly. When the scraped impurities fall, they will not be blown up again by the natural gas due to agglomeration and large mass. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the early warning mechanism of the present invention; Figure 3 A half-section diagram of the sleeve structure of the present invention; Figure 4 A half-section view of the wellhead body structure of the present invention; Figure 5 This is a schematic diagram of the structure of the lower filter plate of the present invention; Figure 6 A half-section view of the filter disc structure of the present invention; Figure 7 It is a half-section diagram of the rotating rod structure of the present invention.

[0012] In the figure: 1. wellhead body; 2. early warning mechanism; 21. mounting plate; 22. outer ring; 23. inner ring; 24. outer conductor; 25. inner conductor; 26. warning light; 27. nut; 28. sleeve; 29. ​​threaded rod; 210. support column; 3. support mechanism; 31. pressure block; 32. transmission rod; 33. support plate; 34. guide hole; 35. moving plate; 36. moving rod; 37. guide rod; 38. lower filter plate; 39. guide groove; 310. upper filter plate; 4. dredging mechanism; 41. rotating rod; 42. blade; 43. filter plate; 44. slide rail; 45. slider; 46. push rod; 47. pressure rod; 48. limit rod; 49. limit plate; 410. rack; 411. connecting rod; 412. teeth; 413. scraper. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] See also Figure 1-Figure 7 One embodiment of the present invention is: a high-pressure gas production wellhead, including a wellhead body 1 and a nut 27, and also includes: The early warning mechanism 2 is arranged on the surface of the wellhead body 1 and is used to detect whether the bolts and nuts 27 at the flange connection of the wellhead body 1 are loose; A support mechanism 3, which is arranged on the surface of the wellhead body 1, and is used to improve the stability of the wellhead body 1 and prevent the wellhead body 1 from settling; A dredging mechanism 4 is arranged on the inner wall of the wellhead body 1, and is used to clean impurities filtered out from the inside of the wellhead body 1 and prevent the wellhead body 1 from being blocked; The early warning mechanism 2 includes a mounting plate 21, an outer ring 22, an inner ring 23, an outer conductor 24, an inner conductor 25, an alarm light 26, a sleeve 28, a threaded rod 29 and a support column 210. The outer ring 22 is fixedly connected to the surface of the mounting plate 21, the inner ring 23 is fixedly connected to the side of the mounting plate 21 close to the wellhead body 1, the outer conductor 24 is fixedly connected to the end face of the outer ring 22, the inner conductor 25 is fixedly connected to the end face of the inner ring 23, the alarm light 26 is installed between the outer conductor 24 and the inner conductor 25, and the threaded rod 29 is fixedly connected to the wellhead body 1. Connected to the bottom of the mounting plate 21, the sleeve 28 is threadedly connected to the circumferential surface of the threaded rod 29, and the support column 210 is fixedly connected to the bottom of the mounting plate 21. When the wellhead device is assembled, the two sets of early warning mechanisms 2 consisting of the outer ring 22, the inner ring 23, the outer conductor 24, the inner conductor 25 and the alarm light 26 are sleeved on the wellhead device, and are threadedly connected to the two threaded rods 29 through the sleeve 28, thereby realizing the connection between the two sets of early warning mechanisms 2. The early warning mechanism 2 can be installed at each flange connection on the wellhead body 1; The outer ring 22 is made of conductive material, and the inner ring 23 is made of non-conductive material; the nut 27 is installed on the surface of the wellhead body 1 by bolts, and the end of the support column 210 away from the mounting plate 21 is in contact with the surface of the wellhead body 1, and the height of the support column 210 is greater than the height of the nut 27. Then, the outer conductor 24 is energized by an external power source. Since the outer ring 22 is made of conductive material and the inner ring 23 is made of non-conductive material, the power will be transmitted to each outer conductor 24 by the outer ring 22, while all the inner conductors 25 are not energized. When the gas wellhead device is used for a long time, the connection between the bolt and the nut 27 is easily loosened due to vibration and high pressure. , which causes the nut 27 to move. When the nut 27 moves, it will contact the outer conductor 24 and the inner conductor 25 at the same time. At this time, the power on the outer conductor 24 will be transferred to the inner conductor 25 by the nut 27, and a loop will be formed between it and the alarm light 26, so that the alarm light 26 is powered on and lights up. Workers can judge which nut 27 under the alarm light 26 is loose by the lighting of the alarm light 26, and carry out maintenance in time to prevent natural gas leakage. After the wellhead device is installed, the function of the support column 210 is to prevent the top of the nut 27 in the initial position from contacting the bottom of the outer conductor 24 and the inner conductor 25.

[0015] Working principle: When assembling the wellhead device, two sets of early warning mechanisms 2 consisting of an outer ring 22, an inner ring 23, an outer conductor 24, an inner conductor 25 and an alarm light 26 are placed on the wellhead device and threadedly connected to two threaded rods 29 through a sleeve 28, thereby realizing the connection between the two sets of early warning mechanisms 2. When the outer conductor 24 is energized by an external power source, since the outer ring 22 is made of conductive material and the inner ring 23 is made of non-conductive material, the power will be transmitted to each outer conductor 24 by the outer ring 22, while all the inner conductors 25 are not energized. When the gas wellhead device is assembled, the outer ring 22 is used to transmit the power to each outer conductor 24, while all the inner conductors 25 are not energized. When the device is used for a long time, vibration and high pressure may easily cause the connection between the bolt and the nut 27 to loosen, thereby causing the nut 27 to move. When the nut 27 moves, it will contact the outer conductor 24 and the inner conductor 25 at the same time. At this time, the power on the outer conductor 24 will be transferred to the inner conductor 25 by the nut 27, and form a loop with the alarm light 26, so that the alarm light 26 is powered on and lights up. Workers can judge which nut 27 under the alarm light 26 is loose by the lighting of the alarm light 26, and carry out maintenance in time to prevent natural gas leakage.

[0016] See also Figure 1-Figure 7On the basis of the above embodiment, in another embodiment of the present invention, the support mechanism 3 includes a pressure block 31, a transmission rod 32, a support plate 33 and a guide hole 34. The transmission rod 32 is slidably connected to the inner wall of the wellhead body 1, the pressure block 31 is fixedly connected to the top of the transmission rod 32, the support plate 33 is rotatably connected to the inner wall of the bottom of the wellhead body 1, and the guide hole 34 is provided on the surface of the support plate 33; the circumferential surface of the transmission rod 32 is respectively provided with a non-self-locking spiral groove and a straight groove, the straight groove is located above the non-self-locking spiral groove, and the straight groove is connected to the non-self-locking spiral groove, the pressure block 31 is connected to the wellhead body 1, the inner wall of the support plate 33 is provided with a block, and the block is located in the non-self-locking spiral groove. When the wellhead device is installed, the pressure block 31 is first hit by a hammer, and the pressure block 31 drives the transmission rod 32 to move downward, and the transmission rod 32 drives the support plate 33 to rotate through the spiral groove on the surface and the block on the inner wall of the support plate 33, so that the support plate 33 rotates and opens, thereby increasing the contact area between the wellhead device and the ground, and improving the stability of the wellhead device; the support mechanism 3 also includes a moving plate 35, a moving rod 36, a guide rod 37, a lower filter plate 38, a guide groove 39 and The upper filter plate 310 and the moving rod 36 are slidably connected to the inner wall of the wellhead body 1, the moving plate 35 is fixedly connected to the surface of the moving rod 36, the guide rod 37 is fixedly connected to the circumferential surface of the moving rod 36, and the lower filter plate 38 is rotatably connected to the inner wall of the wellhead body 1. The upper filter plate 310 is fixedly installed on the inner wall of the wellhead body 1, and the guide groove 39 is opened at the bottom of the lower filter plate 38; the circumferential surface of the moving rod 36 is sleeved with a spring 1, and the two ends of the spring 1 are respectively in contact with the moving plate 35 and the inner wall of the wellhead body 1, the top circumferential surface of the guide rod 37 is in contact with the inner wall of the guide groove 39, and the lower filter plate The top of 38 contacts the bottom of the upper filter plate 310, and the filter holes on the surface of the lower filter plate 38 are misaligned with the filter holes on the surface of the upper filter plate 310. Then, the pressure block 31 is continuously struck, so that the pressure block 31 continues to drive the transmission rod 32 to move downward, and the transmission rod 32 continues to move downward, and the card block will continue to move in the straight groove above the transmission rod 32. Therefore, the support plate 33 will not continue to open after opening to the maximum angle. At the same time, the transmission rod 32 will also be nailed into the ground and nailed into the ground through the guide hole 34 through the installation nail, so that the wellhead device can be further fixed, and it can also prevent the wellhead device from settling.

[0017] The dredging mechanism 4 includes a rotating rod 41, blades 42, a filter plate 43, a slide rail 44 and a slider 45. The rotating rod 41 is rotatably connected to the inner wall of the upper filter plate 310, the blades 42 are rotatably connected to the circumferential surface of the rotating rod 41, the filter plate 43 is fixedly connected to the top of the blades 42, the slide rail 44 is fixedly connected to the top of the filter plate 43, and the slider 45 is slidably connected to the surface of the slide rail 44. The pressure at the initial stage of use at the gas wellhead will be relatively large, while the pressure will be stable in the middle stage, and the pressure will be relatively low in the later stage and pressure supplementation is required for gas production. Therefore, when the pressure is relatively large in the early stage, the natural gas will pass through the lower filter due to the large pressure. The filter plate 310 on the plate 38 is in contact with the blades 42. The inclined blades 42 will be driven to rotate by the circulating natural gas. At this time, the high-pressure natural gas will drive the blades 42 to rotate at a faster speed. The rotation of the blades 42 can adjust the gas flow to avoid excessive fluctuations in the air flow, thereby making the pressure inside the wellhead device relatively fast and stable; the bottom of the slider 45 is in contact with the top of the filter disc 43, and a spring 2 is fixedly connected between the slider 45 and the rotating rod 41. The circumferential surface of the rotating rod 41 is rotatably connected to the inner wall of the lower filter plate 38, and the circumferential surface of the rotating rod 41 is rotatably connected to the inner wall of the filter disc 43;The dredging mechanism 4 also includes a push rod 46, a pressure rod 47, a limit rod 48, a limit plate 49, a rack 410, a connecting rod 411, teeth 412 and a scraper 413. The push rod 46 is fixedly connected to the side of the slider 45 close to the second spring, the pressure rod 47 is slidably connected to the inner wall of the rotating rod 41, the limit rod 48 is fixedly connected to the top of the pressure rod 47, the limit plate 49 is fixedly connected to the circumferential surface of the pressure rod 47, the rack 410 is fixedly connected to the bottom end of the pressure rod 47, the connecting rod 411 is rotatably connected to the inner wall of the rotating rod 41, the teeth 412 are fixedly connected to the circumferential surface of the connecting rod 411, and the scraper 413 is fixedly connected to the connecting rod 41 1, the blade 42 drives the filter plate 43 to rotate, the filter plate 43 drives the slider 45 to rotate through the slide rail 44, the slider 45 moves in the direction away from the rotating rod 41 due to the centrifugal force, the slider 45 drives the push rod 46 to leave the inner wall of the rotating rod 41 and stretch the spring 2, the gas wellhead reduces the discharge after a fixed time, and then the flow rate of the internal natural gas can be reduced, so that the natural gas drives the blade 42 to rotate relatively slowly, at this time the elastic force of the spring 2 is greater than the centrifugal force when the slider 45 rotates, at this time the spring 2 will drive the slider 45 to reset, the slider 45 drives the push rod 46 to reset and pushes the pressure rod 47 downward through the inclined surface, and the pressure rod 47 drives the rack 41 0 moves downward, the rack 410 drives the connecting rod 411 to rotate through the teeth 412, and the connecting rod 411 drives the scraper 413 to rotate and contact the bottom of the lower filter plate 38. At this time, after the push rod 46 is inserted into the rotating rod 41, the rotating filter plate 43 will drive the rotating rod 41 to rotate through the push rod 46, and the rotating rod 41 drives the scraper 413 to rotate through the connecting rod 411, and the inclined scraper 413 will also be driven by the flow of natural gas. At this time, the rotating scraper 413 can rotate to scrape off the impurities attached to the bottom of the lower filter plate 38, and the flow rate of the lifting natural gas is relatively small, so the scraped impurities can fall off to prevent impurities from accumulating. This causes the lower filter plate 38 to become clogged. Most of the impurities are soil. The accumulated soil and impurities are agglomerated under the action of the rotating scraper 413, and their mass will increase significantly. When the scraped impurities fall down, they will not be blown up again by the natural gas due to the agglomeration and large mass. The scraper 413 contacts the bottom of the lower filter plate 38, and a spring 3 is provided between the bottom of the limit plate 49 and the inner wall of the rotating rod 41. The spring 3 is used for the upward movement and reset of the pressure rod 47. The inclined surface of the push rod 46 contacts the top inclined surface of the push rod 47, and the circumferential surface of the push rod 46 contacts the inner wall of the rotating rod 41. The surface of the rack 410 meshes with the surface of the tooth 412.

[0018] Working principle: When installing the wellhead device, first use a hammer to strike the pressure block 31, and the pressure block 31 drives the transmission rod 32 to move downward. The transmission rod 32 drives the support plate 33 to rotate through the spiral groove on the surface and the block on the inner wall of the support plate 33, so that the support plate 33 rotates and opens, thereby increasing the contact area between the wellhead device and the ground, and improving the stability of the wellhead device. Then continue to strike the pressure block 31, so that the pressure block 31 continues to drive the transmission rod 32 to move downward, and the transmission rod 32 continues to move downward, and the block will continue to move in the straight groove above the transmission rod 32. Therefore, the support plate 33 will not continue to open after opening to the maximum angle, and at the same time, the transmission rod 32 will also be nailed into the ground, and the installation nail will pass through the guide hole 34 and nail it into the ground, so that the wellhead device can be further fixed, and it can also well prevent the wellhead device from being installed. The position sinks and the support plate 33 opens. The movable plate 35 will no longer be blocked by the support plate 33. At this time, the compressed spring drives the movable plate 35 to move, and the movable plate 35 drives the movable rod 36 to move. The movable rod 36 drives the guide rod 37 to move. The guide rod 37 pulls the lower filter plate 38 to rotate through the guide groove 39. The filter holes on the surface of the rotated lower filter plate 38 coincide with the filter holes on the surface of the upper filter plate 310, so that ventilation and filtering can be carried out. Before the installation of the wellhead device, the filter holes on the surface of the lower filter plate 38 are misaligned with the filter holes on the surface of the upper filter plate 310, so that the two are not connected, thereby preventing dust from entering during transportation. When the filter holes on the surface of the lower filter plate 38 coincide with the filter holes on the surface of the upper filter plate 310 and are connected, impurities in the extracted natural gas can be filtered to prevent impurities from entering the wellhead device and causing it to be blocked.

[0019] The pressure at the gas production wellhead will be relatively high in the initial stage of use, while the pressure will be stable in the middle stage, and the pressure will be relatively low in the later stage and pressure supplementation gas production will be required. Therefore, when the pressure is relatively high in the early stage, the natural gas will pass through the lower filter plate 38 and the upper filter plate 310 due to the large pressure and contact the blades 42. The inclined blades 42 will be driven to rotate by the circulating natural gas. At this time, the high-pressure natural gas will drive the blades 42 to rotate at a faster speed. The rotation of the blades 42 can adjust the gas flow and avoid excessive air flow fluctuations, thereby making the pressure inside the wellhead device relatively fast and stable. At the same time, the blades 42 drive the filter plate 43 to rotate, and the filter plate 43 drives the slider 45 to rotate through the slide rail 44. The slider 45 moves in the direction away from the rotating rod 41 due to the centrifugal force. The slider 45 drives the push rod 46 to leave the inner wall of the rotating rod 41 and stretch the spring 2. The gas production wellhead reduces the discharge after a fixed time, thereby reducing the flow rate of the internal natural gas, so that the natural gas drives the blades 42 to rotate relatively slowly. At this time, the elastic force of the spring 2 is greater than the centrifugal force when the slider 45 rotates. At this time, the spring 2 will drive the slider 4 5 is reset, the slider 45 drives the push rod 46 to reset and pushes the pressure rod 47 downward through the inclined surface, the pressure rod 47 drives the rack 410 downward, the rack 410 drives the connecting rod 411 to rotate through the teeth 412, the connecting rod 411 drives the scraper 413 to rotate and contact the bottom of the lower filter plate 38, at this time, after the push rod 46 is inserted into the rotating rod 41, the rotating filter plate 43 will drive the rotating rod 41 to rotate through the push rod 46, the rotating rod 41 drives the scraper 413 to rotate through the connecting rod 411, and the inclined scraper 41 3 will also be driven by the circulation of natural gas. At this time, the rotating scraper 413 can scrape off the impurities attached to the bottom of the lower filter plate 38, and the flow rate of the natural gas is relatively small, so the scraped impurities can fall off to prevent the accumulation of impurities and thus blockage of the lower filter plate 38. Most of the impurities are mud, and the accumulated mud and impurities are agglomerated under the action of the rotating scraper 413, and their mass will increase significantly. When the scraped impurities fall, they will not be blown up again by the natural gas due to the agglomeration and large mass.

[0020] The present invention provides a high-pressure gas production wellhead. There are many methods and ways to implement the technical solution. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the protection scope of the present invention. All components not specified in this embodiment can be implemented using existing technologies.

Claims

1. A high-pressure gas production wellhead, comprising a wellhead body (1) and a nut (27), characterized in that: Also includes: An early warning mechanism (2), the early warning mechanism (2) being arranged on the surface of the wellhead body (1) and used for detecting whether the bolts and nuts (27) at the flange connection of the wellhead body (1) are loose; A support mechanism (3), wherein the support mechanism (3) is arranged on the surface of the wellhead body (1) and is used to improve the stability of the wellhead body (1) and prevent the wellhead body (1) from settling; A dredging mechanism (4), the dredging mechanism (4) being arranged on the inner wall of the wellhead body (1) and being used for cleaning impurities filtered out from the inside of the wellhead body (1) and preventing the wellhead body (1) from being blocked; The early warning mechanism (2) comprises a mounting plate (21), an outer ring (22), an inner ring (23), an outer conductor (24), an inner conductor (25), an alarm light (26), a sleeve (28), a threaded rod (29) and a support column (210), wherein the outer ring (22) is fixedly connected to the surface of the mounting plate (21), the inner ring (23) is fixedly connected to a side of the mounting plate (21) close to the wellhead body (1), the outer conductor (24) is fixedly connected to the end surface of the outer ring (22), the inner conductor (25) is fixedly connected to the end surface of the inner ring (23), the alarm light (26) is installed between the outer conductor (24) and the inner conductor (25), the threaded rod (29) is fixedly connected to the bottom of the mounting plate (21), the sleeve (28) is threadedly connected to the circumferential surface of the threaded rod (29), and the support column (210) is fixedly connected to the bottom of the mounting plate (21); The outer ring (22) is made of a conductive material, and the inner ring (23) is made of a non-conductive material.

2. The high-pressure gas production wellhead according to claim 1, characterized in that: The nut (27) is mounted on the surface of the wellhead body (1) by means of bolts, and one end of the support column (210) away from the mounting plate (21) contacts the surface of the wellhead body (1), and the height of the support column (210) is greater than the height of the nut (27).

3. The high-pressure gas production wellhead according to claim 2, characterized in that: The support mechanism (3) comprises a pressure block (31), a transmission rod (32), a support plate (33) and a guide hole (34); the transmission rod (32) is slidably connected to the inner wall of the wellhead body (1); the pressure block (31) is fixedly connected to the top of the transmission rod (32); the support plate (33) is rotatably connected to the inner wall of the bottom of the wellhead body (1); and the guide hole (34) is formed on the surface of the support plate (33).

4. The high-pressure gas production wellhead according to claim 3, characterized in that: The circumferential surface of the transmission rod (32) is respectively provided with a non-self-locking spiral groove and a straight groove, the straight groove is located above the non-self-locking spiral groove, and the straight groove is connected to the non-self-locking spiral groove, the pressure block (31) is in contact with the surface of the wellhead body (1), and the inner wall of the support plate (33) is provided with a clamping block, and the clamping block is located in the non-self-locking spiral groove.

5. The high-pressure gas production wellhead according to claim 4, characterized in that: The support mechanism (3) further comprises a movable plate (35), a movable rod (36), a guide rod (37), a lower filter plate (38), a guide groove (39) and an upper filter plate (310); the movable rod (36) is slidably connected to the inner wall of the wellhead body (1); the movable plate (35) is fixedly connected to the surface of the movable rod (36); the guide rod (37) is fixedly connected to the circumferential surface of the movable rod (36); the lower filter plate (38) is rotatably connected to the inner wall of the wellhead body (1); the upper filter plate (310) is fixedly mounted on the inner wall of the wellhead body (1); and the guide groove (39) is provided at the bottom of the lower filter plate (38).

6. The high-pressure gas production wellhead according to claim 5, characterized in that: A spring 1 is sleeved on the circumferential surface of the moving rod (36), and two ends of the spring 1 are in contact with the inner wall of the moving plate (35) and the wellhead body (1) respectively. The circumferential surface of the top end of the guide rod (37) is in contact with the inner wall of the guide groove (39). The top of the lower filter plate (38) is in contact with the bottom of the upper filter plate (310). The filter holes on the surface of the lower filter plate (38) are misaligned with the filter holes on the surface of the upper filter plate (310).

7. The high-pressure gas production wellhead according to claim 6, characterized in that: The dredging mechanism (4) comprises a rotating rod (41), blades (42), a filter plate (43), a slide rail (44) and a slider (45); the rotating rod (41) is rotatably connected to the inner wall of the upper filter plate (310); the blades (42) are rotatably connected to the circumferential surface of the rotating rod (41); the filter plate (43) is fixedly connected to the top of the blades (42); the slide rail (44) is fixedly connected to the top of the filter plate (43); and the slider (45) is slidably connected to the surface of the slide rail (44).

8. The high-pressure gas production wellhead according to claim 7, characterized in that: The bottom of the slider (45) contacts the top of the filter disc (43), a second spring is fixedly connected between the slider (45) and the rotating rod (41), the circumferential surface of the rotating rod (41) is rotatably connected to the inner wall of the lower filter plate (38), and the circumferential surface of the rotating rod (41) is rotatably connected to the inner wall of the filter disc (43).

9. The high-pressure gas production wellhead according to claim 8, characterized in that: The dredging mechanism (4) further comprises a push rod (46), a pressure rod (47), a limiting rod (48), a limiting plate (49), a rack (410), a connecting rod (411), teeth (412) and a scraper (413); the push rod (46) is fixedly connected to a side of the slider (45) close to the second spring; the pressure rod (47) is slidably connected to the inner wall of the rotating rod (41); the limiting rod (48) is fixedly connected to the top end of the pressure rod (47); the limiting plate (49) is fixedly connected to the circumferential surface of the pressure rod (47); the rack (410) is fixedly connected to the bottom end of the pressure rod (47); the connecting rod (411) is rotatably connected to the inner wall of the rotating rod (41); the teeth (412) are fixedly connected to the circumferential surface of the connecting rod (411); and the scraper (413) is fixedly connected to the end surface of the connecting rod (411).

10. The high-pressure gas production wellhead according to claim 9, characterized in that: The scraper (413) contacts the bottom of the lower filter plate (38), a spring three is provided between the bottom of the limit plate (49) and the inner wall of the rotating rod (41), and the spring three is used for upward movement and resetting of the pressure rod (47), the inclined surface of the push rod (46) contacts the top inclined surface of the pressure rod (47), the circumferential surface of the push rod (46) contacts the inner wall of the rotating rod (41), and the surface of the rack (410) and the surface of the teeth (412) mesh with each other.

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