CN117072102A - 175MPa high pressure gas production wellhead device - Google Patents
175MPa high pressure gas production wellhead device Download PDFInfo
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- CN117072102A CN117072102A CN202311350804.XA CN202311350804A CN117072102A CN 117072102 A CN117072102 A CN 117072102A CN 202311350804 A CN202311350804 A CN 202311350804A CN 117072102 A CN117072102 A CN 117072102A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 118
- 210000001503 joint Anatomy 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 12
- 238000012423 maintenance Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 34
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000003518 caustics Substances 0.000 description 4
- 230000013011 mating Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000003032 molecular docking Methods 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005380 natural gas recovery Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Details Of Valves (AREA)
Abstract
The invention relates to the technical field of oil and gas exploitation, in particular to a 175MPa high-pressure gas production wellhead device, which comprises a tubing head four-way pipe and a top four-way pipe, wherein the bottom of the tubing head four-way pipe is connected with a tubing, the top of the tubing head four-way pipe is connected with the bottom of the top four-way pipe through a double unit valve, and the left end and the right end of the tubing head four-way pipe are respectively connected with an external pipeline through a double unit valve. The high-pressure gas production wellhead device designed by the invention can improve the sealing effect of flange connection by utilizing the sealing ring with a special structure, effectively reduces the occurrence of internal leakage and external leakage accidents through the double unit valve, and adopts two valve plates connected in series for control, so that when one valve plate cannot be sealed, the valve plate can be quickly switched to the other valve plate without immediate maintenance, the maintenance frequency is reduced, and meanwhile, the special design can ensure that the valve plate with internal leakage or external leakage still can be normally opened and closed to avoid influencing the normal flow of an internal flow channel, thereby being more convenient to use.
Description
Technical Field
The invention relates to the technical field of oil and gas exploitation, in particular to a 175MPa high-pressure gas production wellhead device.
Background
The natural gas recovery system has rich natural gas resources in China, and the natural gas resources are usually recovered by drilling, and then the natural gas sprayed in the pipeline is switched on, controlled and guided by utilizing a gas production wellhead device. As production depths increase, 175MPa pressure wellheads begin to develop, but existing production wellhead devices are typically designed for environments of 140MPa or less, which results in leakage that can easily occur if these devices are directly used in 175MPa pressure environments. In addition, although two valve bodies connected in series are adopted on a gas production tree of the traditional gas production wellhead device to control oil gas, when one valve body is seriously leaked, the whole replacement is needed, meanwhile, all parts on the gas production tree are connected through flanges, the flange connection is easy to leak under high pressure, and particularly, the leakage is easy to occur after the valve bodies are corroded for a long time by the oil gas.
The 175MPa high-pressure gas production wellhead device can effectively solve the problems by effectively preventing the valve body from leaking, reducing the maintenance difficulty, prolonging the maintenance period and guaranteeing the production safety.
Disclosure of Invention
The invention aims to provide a 175MPa high-pressure gas production wellhead device so as to solve the problems in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the 175MPa high-pressure gas production wellhead device comprises a tubing head four-way pipe and a top four-way pipe, wherein the bottom of the tubing head four-way pipe is connected with a tubing, the top of the tubing head four-way pipe is connected to the bottom of the top four-way pipe through a double unit valve, the left end and the right end of the tubing head four-way pipe are respectively connected with an external pipeline through a double unit valve, the top of the top four-way pipe is connected with a blowout preventer, and the left end and the right end of the top four-way pipe are respectively connected with an external production pipeline through a double unit valve;
the valve core device of the double unit valve adopts a matching device to control movement, the matching device is driven by a butting device, the butting device adopts a detachable adjusting device to control movement, and a tail end sealing device for sealing the tail end of the butting device to prevent leakage is arranged between the adjusting device and the butting device;
the valve core device comprises a plate valve arranged in a valve cavity of the valve body, a matching hole which corresponds to the internal flow passage and is convenient for oil gas circulation is formed in the plate valve, a third diversion hole which is used for connecting the inner space of the valve cavity at two sides of the valve moving direction is formed in the plate valve, a sealing butt joint protrusion which is inserted into the valve cavity and slides in the valve cavity is integrally formed in the plate valve, the sealing butt joint protrusion is of a strip shape along the valve moving direction, and an auxiliary sealing strip which is used for being attached to the valve cavity and used for sealing is arranged on the surface of the sealing butt joint protrusion;
the cooperation device comprises a driven runner rotatably mounted with the plate valve, a motion cavity for placing the driven runner is arranged in the valve body, and two sides of the driven runner are communicated through a first diversion hole.
Preferably, the end connecting flanges of the tubing head four-way pipe, the top four-way pipe and the duplex unit valve are provided with matching grooves, sealing rings used for sealing gaps between adjacent flanges are arranged in the matching grooves, each sealing ring comprises an inner ring and an outer ring, the inner rings and the outer rings are connected through connecting sheets, and sealing bulges which play a sealing role through compression deformation are arranged on the inner rings and the outer rings.
Preferably, a guide cavity is formed in the valve body, a guide piece inserted into the guide cavity is arranged on the driven rotating wheel, a guide cylinder is arranged on the valve body, a guide shaft inserted into the guide cylinder is coaxially arranged on the driven rotating wheel, and a second guide hole used for communicating the movement cavity with the tail end of the guide cylinder is formed in the guide shaft.
Preferably, the butt joint device comprises a rotating rod rotatably arranged in the valve body, a leakage-proof ring matched with the valve body is arranged on the rotating rod, and an adjusting gear meshed and connected with the driven rotating wheel is fixed at the tail end of the rotating rod.
Preferably, the regulating device comprises a regulating rod which is inserted into the valve body and is rotatably mounted with the rotating rod, a hand wheel and a driven wheel are fixed at the tail end of the regulating rod, a second connecting protrusion is integrally formed at the tail end of the rotating rod, a first connecting protrusion which is tightly clamped and matched with the second connecting protrusion is integrally formed at the tail end of the regulating rod, a driving motor is fixedly mounted outside the valve body, and a driving wheel which is meshed and connected with the driven wheel is driven at the output end of the driving motor.
Preferably, a connecting device for positioning the adjusting rod is arranged between the adjusting rod and the valve body, the connecting device comprises a rotating seat which is concentrically arranged with the adjusting rod and is rotatably arranged with the valve body, and the rotating seat is fixed with the adjusting rod through a third connecting bolt.
Preferably, the end sealing device comprises a sealing plug for sealing the end of the rotating rod, a sealing cavity for guiding the sealing plug to move is formed in the valve body, a sealing isolation piece which slides with the sealing cavity and plays a sealing role is arranged on the sealing plug, an adjusting stud is rotatably arranged at the end of the sealing plug, the outer wall of the adjusting stud is in threaded connection with the outer part of the sealing cavity through threads, and the outer side of the sealing cavity is sealed through the sealing cover.
Preferably, the flange connection of the duplex unit valve and the tubing head four-way pipe and the flange connection of the duplex unit valve and the top four-way pipe are respectively provided with an auxiliary connecting device, the auxiliary connecting devices comprise an upper clamping piece and a lower clamping piece which are used for clamping two adjacent connecting flanges, the upper clamping piece and the lower clamping piece are fixed by adopting a first connecting bolt, the upper clamping piece is divided into two halves and is fixed into a whole by a second connecting bolt, the lower clamping piece is divided into two halves and is fixed into a whole by the second connecting bolt, and through holes which are convenient for operators to screw the upper bolts of the flanges are respectively arranged on the upper clamping piece and the lower clamping piece.
Compared with the prior art, the invention has the beneficial effects that: the high-pressure gas production wellhead device designed by the invention can improve the sealing effect of flange connection by utilizing the sealing ring with a special structure, effectively reduces the occurrence of internal leakage and external leakage accidents through the double unit valve, and adopts two valve plates connected in series for control, so that when one valve plate cannot be sealed, the valve plate can be quickly switched to the other valve plate without immediate maintenance, the maintenance frequency is reduced, and meanwhile, the special design can ensure that the valve plate with internal leakage or external leakage still can be normally opened and closed to avoid influencing the normal flow of an internal flow channel, thereby being more convenient to use.
Drawings
FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention;
FIG. 2 is a schematic view showing the external structure of a double unit valve in embodiment 1 of the present invention;
FIG. 3 is a schematic sectional view of the double unit valve of embodiment 1 of the present invention in the left-right direction;
FIG. 4 is a schematic view showing a cross section of the double unit valve in the horizontal direction in embodiment 1 of the present invention;
FIG. 5 is a schematic view showing a cross section of the double unit valve in the front-rear direction in embodiment 1 of the present invention;
FIG. 6 is a schematic diagram showing the structural connection of the mating device and the valve core device in embodiment 1 of the present invention;
FIG. 7 is a schematic structural view of the engaging device in embodiment 1 of the present invention;
FIG. 8 is a schematic view showing the structure of the adjusting device and the docking device in embodiment 1 of the present invention;
FIG. 9 is a schematic view showing the structure of an end seal device in embodiment 1 of the present invention;
FIG. 10 is a schematic view showing the structure of a seal ring in embodiment 1 of the present invention;
FIG. 11 is a schematic structural view of embodiment 2 of the present invention;
fig. 12 is a schematic structural diagram of an auxiliary connection device in embodiment 2 of the present invention.
In the figure: 1. a seal ring; 101. an inner ring; 102. an outer ring; 103. a connecting sheet; 104. a sealing protrusion; 2. a double unit valve; 3. an auxiliary connection device; 301. an upper clamping piece; 302. a through hole; 303. a lower clamping piece; 304. a first connecting bolt; 305. a second connecting bolt; 4. an end seal; 401. a sealing plug; 402. sealing the spacer; 403. adjusting the stud; 5. a connecting device; 501. a third connecting bolt; 502. a rotating seat; 6. an adjusting device; 601. a hand wheel; 602. driven wheel; 603. an adjusting rod; 7. a mating device; 701. a first deflector aperture; 702. a guide piece; 703. a driven rotating wheel; 704. a guide shaft; 705. a second deflector aperture; 8. a valve core device; 801. plate valve; 802. a third deflector aperture; 803. sealing the butt joint protrusion; 804. an auxiliary sealing strip; 805. a mating hole; 9. a docking device; 901. a leak-proof ring; 902. a rotating lever; 903. an adjusting gear; 10. a driving motor; 11. sealing cover; 12. an internal flow passage; 13. a guide cylinder; 14. a motion cavity; 15. a guide chamber; 16. a valve cavity; 17. a driving wheel; 18. sealing the cavity; 19. a valve body; 20. a mating groove; 21. a first connection protrusion; 22. a second connection protrusion; 23. tubing head four-way pipe; 24. a top four-way pipe.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. Based on the technical solutions of the present invention, all other embodiments obtained by a person skilled in the art without making any creative effort fall within the protection scope of the present invention.
In embodiment 1, referring to fig. 1 to 10, the present invention provides a technical solution: the 175MPa high-pressure gas production wellhead device comprises a tubing head four-way pipe 23 and a top four-way pipe 24, wherein the bottom of the tubing head four-way pipe 23 is connected with a tubing, the top of the tubing head four-way pipe 23 is connected to the bottom of the top four-way pipe 24 through a double unit valve 2, the left end and the right end of the tubing head four-way pipe 23 are respectively connected with an external pipeline through a double unit valve 2, the top of the top four-way pipe 24 is connected with a blowout preventer, and the left end and the right end of the top four-way pipe 24 are respectively connected with an external production pipeline through a double unit valve 2;
referring to fig. 2 to 9, at least two valve core devices 8 connected in series are adopted in the double unit valve 2 to seal an internal flow channel 12 in a valve body 19 for preventing internal leakage and external leakage, the valve core devices 8 of the double unit valve 2 adopt a matching device 7 to control movement, the matching device 7 adopts a butting device 9 to drive, the butting device 9 adopts a detachable adjusting device 6 to control movement, and an end sealing device 4 for sealing the end of the butting device 9 to prevent external leakage is arranged between the adjusting device 6 and the butting device 9;
referring to fig. 5 and 10, the oil pipe head four-way pipe 23, the top four-way pipe 24 and the end connecting flange of the duplex unit valve 2 are provided with a matching groove 20, a sealing ring 1 for sealing a gap between adjacent flanges is arranged in the matching groove 20, the sealing ring 1 comprises an inner ring 101 and an outer ring 102, the inner ring 101 and the outer ring 102 are connected through a connecting sheet 103, the inner ring 101 and the outer ring 102 are provided with sealing bulges 104 for sealing through compression deformation, the sealing ring 1 can form double-layer sealing by utilizing the inner ring 101 and the outer ring 102, oil gas which is wanted to leak from the gap between the adjacent flanges must pass through the sealing bulges 104 positioned on the inner ring 101 and the outer ring 102, the sealing bulges 104 are made of metal or composite materials which can be elastically deformed, so that the sealing bulges 104 can be extruded and deformed and tightly attached to the flanges under strong pressure, thus realizing the sealing effect, while when leakage occurs, there are two general cases, the first is that the pressure between two adjacent flanges is reduced, so that the sealing bulge 104 cannot be completely sealed, at this time, only the two adjacent flanges need to be pressurized again, and the second is that the sealing bulge 104 is corroded by corrosive substances contained in oil gas to generate defects, because the sealing ring adopts an inner layer and outer layer design, even if the inner ring 101 is corroded, a small amount of oil gas can reach the outer ring 102, and further, the application of larger pressure between the two adjacent flanges can enable less of the leaked oil gas in the inner ring 101 to reach the outer ring, and the oil gas cannot flow freely, so that the possibility that more corrosive substances reach the outer ring 102 is reduced, the speed that the outer ring 102 is corroded is greatly smaller than that of the inner ring, therefore, a better sealing protection effect is obtained, and when more gas corrosive substances exist, besides optimizing the material for manufacturing the sealing ring 1 to avoid corrosion, a plurality of sealing rings with different inner diameters can be concentrically arranged between two adjacent flange plates, so that a better sealing effect is obtained;
referring to fig. 3, 4 and 6, the valve core device 8 includes a plate valve 801 provided in a valve cavity 16 of a valve body 19, and a fitting hole 805 corresponding to the internal flow passage 12 and facilitating the circulation of oil gas is provided on the plate valve 801, when the plate valve 801 moves to the internal flow passage 12 corresponding to the fitting hole 805, the oil gas can freely circulate in the internal flow passage 12, and when the plate valve 801 moves to the fitting hole 805 without communicating with the internal flow passage 12 at all, the oil gas in the internal flow passage 12 is cut off and cannot flow, a third orifice 802 for connecting the internal space of the valve cavity 16 on both sides of the moving direction of the plate valve 801 is provided on the plate valve 801, and the third orifice 802 has the function that when a small amount of internal leakage occurs at the plate valve 801 so that the plate valve 801 cannot be completely closed, but the leakage amount is within an acceptable range, the plate valve 801 can still be normally used, except if the third orifice 802 is not present, the oil gas entering the valve cavity 16 seriously hinders the opening and closing of the plate valve 801, so that the plate valve 801 cannot work normally, if the third diversion hole 802 is formed, the oil gas at the two ends of the plate valve 801 in the moving direction can flow freely along the third diversion hole 802, so that the plate valve 801 cannot be hindered from moving normally in the valve cavity 16, the plate valve 801 can be used normally, the plate valve 801 is integrally formed with a sealing butt joint protrusion 803 inserted into the valve cavity 16 to slide, the sealing butt joint protrusion 803 is strip-shaped along the moving direction of the plate valve 801, the surface of the sealing butt joint protrusion 803 is provided with an auxiliary sealing strip 804 for being jointed with the valve cavity 16 for sealing, the auxiliary sealing strip 804 can be made of sealing materials according to the use requirement, particularly the plate valve 801 and the sealing butt joint protrusion 803 are made of materials with small deformation and high strength, the damage of the oil gas under high pressure can be effectively resisted, but a good sealing cooperation effect with the valve body 19 is not easy to provide, so that a better sealing is realized by adopting a material with better shape laminating capability in a region where the oil gas is difficult to contact, the auxiliary sealing strip 804 is mainly selected by considering the components of corrosive substances contained in the oil gas, if more sulfides are contained in the oil gas, the auxiliary sealing strip 804 is prevented from being made of rubber materials, and the sealing effect of the plate valve 801 is effectively improved by the auxiliary sealing strip 804 when the materials are selected appropriately;
referring to fig. 3, fig. 4, fig. 6 and fig. 7, the matching device 7 includes a driven runner 703 rotatably mounted with a plate valve 801, and a motion cavity 14 for placing the driven runner 703 is provided in a valve body 19, two sides of the driven runner 703 are communicated by adopting a first diversion hole 701, a guide cavity 15 is provided in the valve body 19, a guide piece 702 inserted into the guide cavity 15 is provided on the driven runner 703, a guide cylinder 13 is provided on the valve body 19, and a guide shaft 704 inserted into the guide cylinder 13 is coaxially provided on the driven runner 703, a second diversion hole 705 for communicating the motion cavity 14 with the tail end of the guide cylinder 13 is provided on the guide shaft 704, when the driven runner 703 rotates along the axis of the driven runner 703 and drives the plate valve 801 to move along the axis of the motion cavity 14, the guide piece 702 and the guide piece 704 are adopted to guide the motion direction of the driven runner 703, so as to prevent the driven runner 703 from vibrating or deflecting, and when the plate valve 801 cannot completely close an internal runner 12 to enable part of the oil gas to enter the motion cavity 14, since the two sides of the motion cavity 14 are communicated by adopting the first diversion hole 701, and the guide cylinder 13 and the motion cavity 14 are also coaxially provided with the guide shaft 704 inserted into the motion cavity 13, and the second diversion hole 705 are provided on the guide shaft 704, and the driven runner 703 can still move along the motion path of the motion of the driven runner 703 by opening and the motion of the motion cavity 703;
referring to fig. 4 and 8, the docking device 9 includes a rotating rod 902 rotatably installed in the valve body 19, and the rotating rod 902 is provided with a leakage preventing ring 901 mounted in cooperation with the valve body 19, the leakage preventing ring 901 is used for preventing leakage of oil gas, an adjusting gear 903 engaged with and connected with a driven rotating wheel 703 is fixed at the end of the rotating rod 902, the adjusting gear 903 does not move axially during adjustment, but is moved axially by the driven rotating wheel 703 along the adjusting gear 903, the adjusting device 6 includes an adjusting rod 603 rotatably installed in the valve body 19 and inserted into the valve body 19, a hand wheel 601 and a driven wheel 602 are fixed at the end of the adjusting rod 603, a second connecting protrusion 22 is integrally formed at the end of the rotating rod 902, a first connecting protrusion 21 in clamping cooperation with the second connecting protrusion 22 is integrally formed at the end of the adjusting rod 603, the first connecting protrusion 21 and the second connecting protrusion 22 are connected by a detachable clip, the driving motor 10 is fixedly arranged outside the valve body 19, the driving wheel 17 meshed with the driven wheel 602 is driven at the output end of the driving motor 10, an operator can manually operate the hand wheel 601 to rotate the adjusting rod 603, the adjusting rod 603 can also be driven to rotate through the driving motor 10, the forward rotation and the reverse rotation of the adjusting rod 603 can be performed in the movement direction of the corresponding adjusting valve core 801 after being conducted through the abutting device 9 and the matching device 7, a connecting device 5 for positioning the adjusting rod 603 is arranged between the adjusting rod 603 and the valve body 19, the connecting device 5 comprises a rotating seat 502 which is arranged concentrically with the adjusting rod 603 and is rotatably arranged with the valve body 19, the rotating seat 502 is fixed with the adjusting rod 603 through a third connecting bolt 501, the adjusting rod 603 can be always inserted into the valve body 19 without being taken out after the third connecting bolt 501 is fixed with the adjusting rod 603, when the third connecting screw 501 is out of the fixation of the adjusting rod 603, the adjusting device 6 can be taken out entirely;
referring to fig. 4 and 9, the end sealing device 4 includes a sealing plug 401 for closing the end of a rotating rod 902, a sealing cavity 18 for guiding the sealing plug 401 to move is formed in a valve body 19, a sealing isolation piece 402 sliding with the sealing cavity 18 and playing a sealing role is provided on the sealing plug 401, an adjusting stud 403 is rotatably installed at the end of the sealing plug 401, the outer wall of the adjusting stud 403 is installed with the outer screw of the sealing cavity 18 through threads, the outer side of the sealing cavity 18 is sealed through a sealing cover 11, when the adjusting device 6 completes adjustment and is taken out from the valve body 19, or when a plate valve 801 corresponding to the adjusting device 6 has serious leakage, the adjusting device 6 firstly adjusts the position of the corresponding plate valve 801 to enable the plate valve 801 to be in a fully opened position, the double unit valve 2 is also switched to use of another plate valve 801 to realize subsequent switch adjustment, the adjusting device 6 is completely removed, the position for installing the adjusting device 6 is sealed by the adjusting stud 403, the outer leakage is prevented, the outer leakage is enabled to move to the sealing plug 401 to the position for inserting the adjusting rod 603 through rotating the adjusting stud 403, at the moment, and meanwhile, the sealing effect can be improved by the sealing effect can be controlled by the sealing plug 801 to be completely corresponding to the sealing channel 801, and the sealing channel 801 can be completely controlled by the sealing effect of the sealing plate 801.
The high-pressure gas production wellhead device mainly improves the sealing effect on oil gas, on one hand, the sealing ring 1 is adopted to reduce leakage caused by flange connection, on the other hand, the double unit valve 2 is adopted to improve the reliability of valve bodies at all positions, two valve plates 801 are adopted in the double unit sealing valve 2 to operate in series, when one valve plate 801 cannot guarantee the sealing effect, the valve plates 801 can be switched to the normal operation of the other valve plate 801, the damaged valve plates 801 can be switched to the fully opened state through special design, the normal flow in the internal flow channel 12 is prevented from being influenced, meanwhile, the valve plates 801 are also specially designed to effectively prevent internal leakage, meanwhile, the path required by the external leakage of the valve body 19 is prolonged, so that the external leakage is more difficult, and a labor-saving mechanism can be formed through the combination of the butt joint device 9 and the matching device 7, so that the change of the positions of the valve plates 801 by operators is more convenient, and the high practical value is achieved.
In embodiment 2, compared with embodiment 1, the auxiliary connecting devices 3 are further arranged at the flange connection part of the duplex unit valve 2 and the tubing head four-way pipe 23 and the flange connection part of the duplex unit valve 2 and the top four-way pipe 24, the auxiliary connecting devices 3 comprise an upper clamping piece 301 and a lower clamping piece 303 for clamping two adjacent connecting flanges, the upper clamping piece 301 and the lower clamping piece 303 are fixed by adopting a first connecting bolt 304, the upper clamping piece 301 is divided into two halves and is fixed into a whole by a second connecting bolt 305, the lower clamping piece 303 is divided into two halves and is fixed into a whole by the second connecting bolt 305, and through holes 302 for facilitating an operator to screw the upper bolts of the flanges are respectively arranged on the upper clamping piece 301 and the lower clamping piece 303. According to the method, when the double unit valve 2 is installed on the pipeline oil pipe head four-way pipe 23 or the top four-way pipe 24, the auxiliary connection device 3 is utilized to assist in installation, and the phenomenon that the flange bending is inconvenient to install can occur due to different tightening degrees in the installation process if the auxiliary connection device 3 is not removed, specifically, an operator firstly places the upper clamping piece 301 and the lower clamping piece 303 on the adjacent flange correctly, then presses the upper clamping piece 301 and the lower clamping piece 303 to a specified pressurizing degree through external hydraulic equipment, at the moment, the adjacent two flange plates are tightly pressed under the pressing of the upper clamping piece 301 and the lower clamping piece 303, then the operator passes bolts for fixing the adjacent two flange plates through the bolts for correct installation through the bolts 302, the phenomenon that the flange plates are inconvenient to install can occur due to different tightening degrees in the installation process is avoided, after the bolts for directly fixing the adjacent flange plates are screwed down, the auxiliary connection device 3 is directly removed according to the requirement, the upper clamping piece 301 and the lower clamping piece 303 are fixed through the first connecting bolts 304, the adjacent flange plates can be tightly pressed down, the adjacent flange plates can be replaced due to the fact that the adjacent flange plates are not easy to be replaced due to the fact that the adjacent flange plates are directly connected in the adjacent flange plates are not easy to be replaced, and the adjacent flange plates can be replaced due to the fact that the adjacent flange plates are not easy to be replaced.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A175 MPa high pressure gas production wellhead device, its characterized in that: the oil pipe four-way pipe comprises an oil pipe head four-way pipe (23) and a top four-way pipe (24), wherein the bottom of the oil pipe head four-way pipe (23) is connected with an oil pipe, the top of the oil pipe head four-way pipe (23) is connected to the bottom of the top four-way pipe (24) through a double unit valve (2), the left end and the right end of the oil pipe head four-way pipe (23) are respectively connected with an external pipeline through the double unit valve (2), the top of the top four-way pipe (24) is connected with a blowout preventer, and the left end and the right end of the top four-way pipe (24) are respectively connected with an external production pipeline through the double unit valve (2);
the valve is characterized in that at least two valve core devices (8) connected in series are adopted in the double unit valve (2) to seal an inner flow channel (12) positioned in a valve body (19) and used for preventing inner leakage and outer leakage, the valve core devices (8) of the double unit valve (2) are controlled to move by adopting a matching device (7), the matching device (7) is driven by adopting a butting device (9), the butting device (9) is controlled to move by adopting a detachable adjusting device (6), and a tail end sealing device (4) for sealing the tail end of the butting device (9) and preventing outer leakage is arranged between the adjusting device (6) and the butting device (9);
the valve core device (8) comprises a plate valve (801) arranged in a valve cavity (16) of a valve body (19), a matching hole (805) which corresponds to an inner flow channel (12) and is convenient for oil and gas circulation is formed in the plate valve (801), a third diversion hole (802) which is used for connecting the inner space of the valve cavity (16) at two sides of the moving direction of the plate valve (801) is formed in the plate valve (801), a sealing butt joint protrusion (803) which is inserted into the valve cavity (16) and slides in the valve cavity (16) is integrally formed in the plate valve (801), the sealing butt joint protrusion (803) is in a strip shape along the moving direction of the plate valve (801), and an auxiliary sealing strip (804) which is used for being attached to the valve cavity (16) and used for sealing is arranged on the surface of the sealing butt joint protrusion (803);
the cooperation device (7) comprises a driven rotating wheel (703) rotatably mounted with the plate valve (801), a moving cavity (14) for placing the driven rotating wheel (703) is formed in the valve body (19), and two sides of the driven rotating wheel (703) are communicated through a first diversion hole (701).
2. A 175MPa high pressure gas production wellhead assembly according to claim 1, wherein: the oil pipe head four-way pipe (23), the top four-way pipe (24) and the tail end connecting flange of the duplex unit valve (2) are provided with matching grooves (20), sealing rings (1) used for sealing gaps between adjacent flanges are arranged in the matching grooves (20), each sealing ring (1) comprises an inner ring (101) and an outer ring (102), the inner rings (101) and the outer rings (102) are connected through connecting pieces (103), and sealing bulges (104) which play a sealing role through compression deformation are arranged on the inner rings (101) and the outer rings (102).
3. A 175MPa high pressure gas production wellhead assembly according to claim 1, wherein: the novel valve is characterized in that a guide cavity (15) is formed in the valve body (19), a guide piece (702) inserted into the guide cavity (15) is arranged on the driven rotating wheel (703), a guide cylinder (13) is arranged on the valve body (19), a guide shaft (704) inserted into the guide cylinder (13) is coaxially arranged on the driven rotating wheel (703), and a second guide hole (705) used for communicating the movement cavity (14) with the tail end of the guide cylinder (13) is formed in the guide shaft (704).
4. A 175MPa high pressure gas production wellhead assembly according to claim 1, wherein: the butt joint device (9) comprises a rotating rod (902) rotatably arranged in the valve body (19), a leakage-proof ring (901) matched with the valve body (19) is arranged on the rotating rod (902), and an adjusting gear (903) meshed and connected with the driven rotating wheel (703) is fixed at the tail end of the rotating rod (902).
5. The 175MPa high-pressure gas production wellhead device of claim 4, wherein: the adjusting device (6) comprises an adjusting rod (603) which is inserted into the valve body (19) and is rotatably mounted with a rotating rod (902), a hand wheel (601) and a driven wheel (602) are fixed at the tail end of the adjusting rod (603), a second connecting protrusion (22) is integrally formed at the tail end of the rotating rod (902), a first connecting protrusion (21) which is tightly clamped and matched with the second connecting protrusion (22) is integrally formed at the tail end of the adjusting rod (603), a driving motor (10) is fixedly mounted outside the valve body (19), and a driving wheel (17) which is meshed and connected with the driven wheel (602) is driven at the output end of the driving motor (10).
6. The 175MPa high-pressure gas production wellhead device of claim 5, wherein: connecting device (5) for positioning the adjusting rod (603) are arranged between the adjusting rod (603) and the valve body (19), the connecting device (5) comprises a rotating seat (502) which is concentric with the adjusting rod (603) and is rotatably installed with the valve body (19), and the rotating seat (502) is fixed with the adjusting rod (603) through a third connecting bolt (501).
7. The 175MPa high-pressure gas production wellhead device of claim 5, wherein: the end sealing device (4) comprises a sealing plug (401) for sealing the tail end of a rotating rod (902), a sealing cavity (18) for guiding the sealing plug (401) to move is formed in a valve body (19), a sealing isolation piece (402) which slides with the sealing cavity (18) and plays a sealing role is arranged on the sealing plug (401), an adjusting stud (403) is installed at the tail end of the sealing plug (401) in a rotating mode, the outer wall of the adjusting stud (403) is installed with the outer portion of the sealing cavity (18) in a threaded mode, and the outer side of the sealing cavity (18) is sealed through a sealing cover (11).
8. A 175MPa high pressure gas production wellhead assembly according to claim 1, wherein: the flange connection of the duplex unit valve (2) and the tubing head four-way pipe (23) and the flange connection of the duplex unit valve (2) and the top four-way pipe (24) are both provided with auxiliary connecting devices (3), the auxiliary connecting devices (3) comprise an upper clamping piece (301) and a lower clamping piece (303) for clamping two adjacent connecting flanges, the upper clamping piece (301) and the lower clamping piece (303) are fixed by adopting a first connecting bolt (304), the upper clamping piece (301) is divided into two halves and is fixed into a whole by a second connecting bolt (305), the lower clamping piece (303) is divided into two halves and is fixed into a whole by the second connecting bolt (305), and through holes (302) for facilitating an operator to screw the flange upper bolts are respectively arranged on the upper clamping piece (301) and the lower clamping piece (303).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311350804.XA CN117072102B (en) | 2023-10-18 | 2023-10-18 | 175MPa high pressure gas production wellhead device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311350804.XA CN117072102B (en) | 2023-10-18 | 2023-10-18 | 175MPa high pressure gas production wellhead device |
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| CN117072102A true CN117072102A (en) | 2023-11-17 |
| CN117072102B CN117072102B (en) | 2023-12-19 |
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| CN208106373U (en) * | 2018-04-28 | 2018-11-16 | 大庆新复新机械设备修复技术有限公司 | A kind of oil well head blowout hookup |
| US20190010781A1 (en) * | 2017-07-07 | 2019-01-10 | Seaboard International, Inc. | Connection between an oil and gas fracturing tree and a zipper module |
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| CN113374461A (en) * | 2021-07-12 | 2021-09-10 | 山西沁盛煤层气作业有限责任公司 | Method for dragging underground pipe string under pressure |
| CN114458240A (en) * | 2022-02-17 | 2022-05-10 | 吴昌善 | Oil field is recovered with production tree that possesses multistage throttle transform function |
| CN219528971U (en) * | 2023-04-17 | 2023-08-15 | 建湖县鸿达阀门管件有限公司 | 175MPa high-pressure sulfur-resistant oil production wellhead oil pipe head structure and oil production wellhead device |
-
2023
- 2023-10-18 CN CN202311350804.XA patent/CN117072102B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190010781A1 (en) * | 2017-07-07 | 2019-01-10 | Seaboard International, Inc. | Connection between an oil and gas fracturing tree and a zipper module |
| CN208106373U (en) * | 2018-04-28 | 2018-11-16 | 大庆新复新机械设备修复技术有限公司 | A kind of oil well head blowout hookup |
| CN113187425A (en) * | 2021-04-26 | 2021-07-30 | 建湖县鸿达阀门管件有限公司 | Ultrahigh-pressure ultrahigh-temperature high-sulfur-resistance HH-grade gas production wellhead device |
| CN113374461A (en) * | 2021-07-12 | 2021-09-10 | 山西沁盛煤层气作业有限责任公司 | Method for dragging underground pipe string under pressure |
| CN114458240A (en) * | 2022-02-17 | 2022-05-10 | 吴昌善 | Oil field is recovered with production tree that possesses multistage throttle transform function |
| CN219528971U (en) * | 2023-04-17 | 2023-08-15 | 建湖县鸿达阀门管件有限公司 | 175MPa high-pressure sulfur-resistant oil production wellhead oil pipe head structure and oil production wellhead device |
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| CN117072102B (en) | 2023-12-19 |
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