CN113187425A - Ultrahigh-pressure ultrahigh-temperature high-sulfur-resistance HH-grade gas production wellhead device - Google Patents
Ultrahigh-pressure ultrahigh-temperature high-sulfur-resistance HH-grade gas production wellhead device Download PDFInfo
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- CN113187425A CN113187425A CN202110452438.3A CN202110452438A CN113187425A CN 113187425 A CN113187425 A CN 113187425A CN 202110452438 A CN202110452438 A CN 202110452438A CN 113187425 A CN113187425 A CN 113187425A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 43
- 238000007789 sealing Methods 0.000 claims abstract description 97
- 229910052751 metal Inorganic materials 0.000 claims abstract description 32
- 239000002184 metal Substances 0.000 claims abstract description 32
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 29
- 239000011593 sulfur Substances 0.000 claims abstract description 29
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 25
- 230000002706 hydrostatic effect Effects 0.000 claims abstract description 14
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 14
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 14
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 14
- 239000000956 alloy Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 12
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910000851 Alloy steel Inorganic materials 0.000 claims abstract description 6
- 229910052755 nonmetal Inorganic materials 0.000 claims abstract description 6
- 238000002474 experimental method Methods 0.000 claims abstract description 5
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims description 54
- 239000004519 grease Substances 0.000 claims description 40
- 238000002347 injection Methods 0.000 claims description 40
- 239000007924 injection Substances 0.000 claims description 40
- 238000003825 pressing Methods 0.000 claims description 18
- 238000009434 installation Methods 0.000 claims description 11
- 239000011148 porous material Substances 0.000 claims description 11
- 238000000429 assembly Methods 0.000 claims description 9
- 230000000712 assembly Effects 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 5
- 229910001119 inconels 625 Inorganic materials 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000005864 Sulphur Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 28
- 230000000087 stabilizing effect Effects 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 6
- 229910001026 inconel Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229920001973 fluoroelastomer Polymers 0.000 description 2
- 229910021389 graphene Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 2
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
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Classifications
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- 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
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
-
- 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
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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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)
- Geophysics (AREA)
- Valve Housings (AREA)
- Earth Drilling (AREA)
Abstract
An ultrahigh pressure and ultrahigh temperature high sulfur-resistant HH-grade gas production wellhead device comprises a gas production tree device and a tubing head device; the gas production tree device comprises an upper flange, four manual flat valves, a hydraulic safety valve and a small four-way valve; the oil pipe head device comprises an oil pipe head body, an oil pipe hanger is arranged at the upper end in the oil pipe head body, and the problems of ultrahigh pressure resistance, high temperature resistance and high sulfur resistance of the well control casing head are successfully solved by selecting materials; the sealing is carried out in a mode of combining a metal sealing box and a non-metal sealing element, and the non-metal sealing element is made of modified polytetrafluoroethylene and has very good sealing performance at the temperature of 300 ℃; all the bearing parts are made of low alloy steel and nickel-based alloy which can bear ultrahigh pressure, resist high temperature and resist sulfur, and the sealing surfaces contacting with the medium are all formed by hard alloy surfacing. The ultrahigh pressure ultrahigh temperature high sulfur-resistant HH-grade gas production wellhead device disclosed by the invention is subjected to hydrostatic pressure experiments, and the rated working pressure is the ultrahigh pressure of 105 MPa.
Description
Technical Field
The invention belongs to the technical field of oil and gas exploitation well control equipment, and particularly relates to an ultrahigh-pressure ultrahigh-temperature high-sulfur-resistance HH-grade gas production well head device.
Background
At present, the requirements on HSE (high speed hydrocarbon) exploitation are known to be more and more strict, and the requirements on a drilling well control device used for oil and gas development are higher and higher, so that the drilling well control device is very often usedHigh temperature resistant, high sulfur content and high product oil and gas fields are explored in multiple areas, and due to the technical bottleneck, shelving development is adopted, so that risks are reduced. So that it is resistant to superhigh pressure, high-temp. (180 deg.C) and high-sulfur (H)2The S content is 13 to 17 percent), the demand of well control devices used for oil and gas exploitation is more and more strong, and the existing devices can not be improved in the environments with ultrahigh pressure resistance, high temperature resistance and high sulfur resistance.
Disclosure of Invention
In order to solve the existing problems, the invention aims to provide an ultrahigh-pressure ultrahigh-temperature high-sulfur-resistance HH-grade gas production wellhead device, which realizes the requirements of ultrahigh-pressure resistance, high-temperature resistance and high-sulfur resistance by jointly controlling the gas production wellhead device from two aspects of material selection and structural design.
In order to achieve the purpose, the technical scheme of the invention is as follows:
an ultrahigh-pressure ultrahigh-temperature high-sulfur-resistance HH-grade gas production wellhead device sequentially comprises a gas production tree device and a tubing head device from top to bottom;
the gas tree production device comprises an upper flange, a first manual flat valve, a hydraulic safety valve and a small four-way joint, wherein the upper end of the upper flange is connected with the first manual flat valve, the upper end of the first manual flat valve is connected with the hydraulic safety valve through a first bolt and nut component and a first threaded flange, the upper end of the hydraulic safety valve is connected with the small four-way joint through a first screw thread flange and a second bolt and nut component, the left side of the small four-way joint is connected with the second manual flat valve through the first screw thread flange and a second bolt and nut component, the right side of the small four-way joint is connected with a third manual flat valve through the first screw thread flange and the second bolt and nut component, and the upper end of the small four-way joint is connected with a fourth manual flat valve through the first screw thread flange and the second bolt and nut component;
the oil pipe head device comprises an oil pipe head body, an oil pipe hanger is arranged at the upper end in the oil pipe head body, and a first sealing element, a group of second sealing elements and a third sealing element are arranged between the inner side of the upper flange and the outer side of the upper end of the oil pipe hanger; and a group of fourth sealing elements and fifth sealing elements are arranged between the inner side of the oil pipe head body and the outer side of the lower end of the oil pipe hanger.
A fifth manual flat valve and a sixth manual flat valve are arranged on a left bypass of the oil pipe head body, and a seventh manual flat valve and an eighth manual flat valve are respectively arranged on a right bypass of the oil pipe head body; a flange at the lower end of the oil pipe head body is connected with a neck flange through a third bolt and nut assembly; and a sixth sealing element, a seventh sealing element and an eighth sealing element are arranged between the oil pipe head body and the neck flange.
Furthermore, in the above structure, the second manual flat valve includes a second manual flat valve body, one end of the second manual flat valve body, which is opposite to the small four-way, is connected to the first fixed throttle valve through the first threaded flange and the first bolt-nut assembly, and the first fixed throttle valve is further connected to the first square right-angle stop valve through the first threaded flange and the first bolt-nut assembly; the third manual flat valve comprises a third manual flat valve body, one end, opposite to the small four-way joint, of the third manual flat valve body is connected with a second fixed throttle valve through a first instrument flange, the second fixed throttle valve is further connected with a second square right-angle stop valve through a first threaded flange and a first bolt and nut assembly, and a first square through stop valve and a first double-scale sulfur-proof anti-seismic pressure gauge are arranged above the first instrument flange; the fourth manual flat valve comprises a fourth manual flat valve body, and one end, opposite to the small four-way valve body, of the fourth manual flat valve body is connected with the second square through stop valve and the second double-scale sulfur-proof anti-seismic pressure gauge through the first threaded flange and the first bolt-nut assembly.
Furthermore, in the above structure, the fifth manual flat valve includes a fifth manual flat valve body, the sixth manual flat valve includes a sixth manual flat valve body, one end of the fifth manual flat valve body is connected to the oil pipe head body through a second screw flange and a fourth bolt and nut assembly, the opposite end of the fifth manual flat valve body is connected to the sixth manual flat valve body through a second screw flange and a third bolt and nut assembly, and the opposite end of the sixth manual flat valve body and the fifth manual flat valve body is connected to the third square stop valve through a second screw flange and a third bolt and nut assembly; the seventh manual flat valve comprises a seventh manual flat valve body, the eighth manual flat valve comprises an eighth manual flat valve body, one end of the seventh manual flat valve is connected with the oil pipe head body through a second screw thread flange and a fourth bolt and nut assembly, the other opposite end of the seventh manual flat valve is connected with the eighth manual flat valve body through a second instrument flange, and the other opposite end of the eighth manual flat valve body and the seventh manual flat valve is connected with a fourth square right-angle stop valve through a second screw thread flange and a third bolt and nut assembly; and a third square through stop valve and a third double-scale sulfur-proof shock-proof pressure gauge are arranged above the second instrument flange.
Furthermore, in the structure, two pipeline ducts are radially formed in a flange at the upper end of the oil pipe head body, a group of pipeline installation assemblies are respectively installed at the outer ports of the pipeline ducts, and the pipeline installation assemblies are clamping joints or screwed plugs and perforation pressure caps and are used for installing and fixing pipelines so that the pipelines penetrate through the middles of the pipeline installation assemblies; and a jackscrew channel is further arranged on a flange at the upper end of the oil pipe head body along the radial direction and is arranged at the lower end of the wiring pore channel, and a jackscrew assembly is arranged in the jackscrew channel.
Furthermore, in the structure, the upper flange is provided with a grease injection pressure test pore channel I along the radial direction, and the outer ports of the grease injection pressure test pore channel I are respectively provided with a first grease injection pressure test component; two grease injection pressure test pore channels II are formed in the flange at the lower end of the oil pipe head body along the radial direction, and a group of second grease injection pressure test assemblies are respectively mounted at the outer ports of the two grease injection pressure test pore channels II; the lower end of the neck flange is provided with two grease injection pressure test hole channels III along the radial direction, and the outer ports of the grease injection pressure test hole channels III are respectively provided with a group of third grease injection pressure test assemblies; a sixth sealing element is connected in the grease injection pressure test pore channel II, and an eighth sealing element is connected in the grease injection pressure test pore channel II; first notes fat pressure testing subassembly, second notes fat pressure testing subassembly and third notes fat pressure testing subassembly all include plug connector and notes fat pressure testing valve.
Further, in the above structure, the fourth sealing element is an O-shaped non-metallic sealing ring made of a modified polytetrafluoroethylene material; the fifth sealing element consists of a first upper metal sealing ring, a first lower metal sealing ring, a first metal pressure ring and a first P-shaped sealing ring; the seventh sealing element consists of a second upper metal sealing ring, a second lower metal sealing ring, a second metal pressing ring and a second P-shaped sealing ring; the first sealing element, the third sealing element and the eighth sealing element are octagonal ring metal steel rings; and the sixth sealing element and the eighth sealing element are both BT sealing ring structures made of modified polytetrafluoroethylene materials.
Further, in the above structure, the jackscrew assembly includes a jackscrew body, a jackscrew support ring, a jackscrew filler, a jackscrew pressing ring and a jackscrew pressing cap; the jackscrew body is sequentially connected with the jackscrew support ring, the jackscrew filler and the jackscrew pressing ring, and a jackscrew pressing cap is arranged on the right side of the jackscrew body; the end part of the jackscrew body extends to the shoulder inclined plane of the oil pipe hanger, and the jackscrew body is connected with the oil pipe hanger in a conical surface matching mode.
Further, in the above structure, the first bolt-nut assembly includes a stud bolt, a nut, and a gasket ring; the second bolt-nut assembly comprises a wire-planting bolt, a nut and a sealing gasket ring; the third bolt-nut assembly comprises a stud bolt, a nut and a sealing gasket ring; the fourth bolt-nut assembly comprises a wire-planting bolt, a nut and a sealing gasket ring.
Furthermore, the bearing part of the ultrahigh-pressure ultrahigh-temperature high-sulfur-resistance HH-grade gas production wellhead device is prepared from low alloy steel 4130 and nickel-based alloy 725, which can bear ultrahigh pressure, resist high temperature and resist sulfur, sealing surfaces in contact with media are formed by build-up welding of hard alloy inconel 625, and the thickness of a welding layer is not less than 3.5 mm. Specifically, the oil pipe head body, the small four-way joint, the valve bodies and valve covers of all valves and all flanges are prepared from high-temperature-resistant high-sulfur-resistant low alloy steel 4130; all the bolt and nut components, the jackscrew components except the jackscrew filler and the plug joints are made of inconel 725 material; all the metal sealing rings are made of inconel 825 alloy materials; all non-metallic sealing elements/rings are made of modified polytetrafluoroethylene materials, and have good sealing effect at the temperature below 300 ℃. The modified polytetrafluoroethylene is prepared from polytetrafluoroethylene, fluororubber, phenolic epoxy resin, a vulcanizing agent, bronze powder, graphene and molybdenum disulfide. The vulcanizing agent consists of a vulcanizing agent PDM, sulfur and white carbon.
Further, the ultrahigh-pressure ultrahigh-temperature high-sulfur-resistance HH-grade gas production wellhead device is subjected to hydrostatic pressure experiments, and the rated working pressure is 105 MPa.
Specifically, the gas production tree device hydrostatic pressure test process is as follows: (1) the gas production tree device which is completely assembled by adopting the device which is subjected to the body hydrostatic pressure strength test only needs to be tested to the rated working pressure (105 MPa); the pressure is increased from zero to 105MPa, and the pressure stabilizing time is not less than 3 min; (2) the pressure drops to zero; (3) the pressure is increased to 105MPa again, and the pressure stabilizing time is not less than 15 min; (4) the experimental results are as follows: no leakage was visible.
Specifically, the hydrostatic test process of the tubing head device is as follows: (1) the oil pipe four-way joint which is completely assembled by adopting the device which is subjected to the body hydrostatic strength test only needs to be tested to the rated working pressure (105 MPa), the pressure is increased to 105MPa from zero, and the pressure stabilizing time is not less than 3 min; (2) the pressure drops to zero; (4) the pressure is increased to 105MPa again, and the pressure stabilizing time is not less than 15 min; (4) the experimental results are as follows: no leakage was visible.
In addition, all the above-mentioned manual flat valves were subjected to a hydrostatic strength test of 157.5 MPa.
The technical scheme shows that the invention has the following beneficial effects: according to the ultrahigh-pressure ultrahigh-temperature high-sulfur-resistance HH-grade gas production wellhead device, the problems of ultrahigh-pressure resistance, high-temperature resistance and high-sulfur resistance of a well control casing head are successfully solved through material selection; sealing is carried out in a mode of combining non-metal sealing elements of a metal sealing box, and all metal sealing rings are made of inconel 825 alloy materials; the nonmetal sealing element is made of modified polytetrafluoroethylene, and has very good sealing performance at the high temperature of 300 ℃; all sealing surfaces of the gas production wellhead device, which are in contact with the medium, are formed by adopting hard alloy inconel 625 for surfacing, and the corrosion of the alloy to hydrogen sulfide is unlimited; all the bolt and nut components and the jackscrew component are made of inconel 725 material; on the premise of ensuring high pressure resistance, the ultrahigh pressure ultrahigh temperature high sulfur-resistant HH-grade gas production wellhead device has the characteristics of high temperature resistance and high sulfur resistance, and has ultrahigh pressure with rated working pressure of 105MPa through hydrostatic pressure experiments.
Drawings
FIG. 1 is a schematic structural diagram of an ultrahigh pressure and temperature high sulfur resistance HH-grade gas production wellhead assembly according to the present invention;
FIG. 2 is a schematic diagram of the tubing head assembly of the present invention;
FIG. 3 is a schematic view of the tubing hanger of the present invention;
FIG. 4 is a schematic view of the tubing hanger of the present invention;
FIG. 5 is a schematic view of a fifth seal according to the present invention;
FIG. 6 is a schematic view of a seventh seal according to the present invention;
fig. 7 is a schematic structural view of the jackscrew assembly of the present invention.
In the figure: 100 small four-way; 101 a first manual plate valve; 102 a second manual plate valve; 103 a third manual plate valve; 104 a fourth manual plate valve; 105 an upper flange; 106 a hydraulic relief valve; 107 a first threaded flange; 108 a first threaded flange; 109 a first bolt and nut assembly; 110 a second bolt-and-nut assembly; 121 a first square right angle stop valve; 122 a first fixed throttle; 125 a second manual plate valve body; 135 a third manual plate valve body; 131 a second square right-angle stop valve; 132 second fixed throttle; 136 a first double-scale sulfur-proof and shock-proof pressure gauge; 137 a first instrument flange; 138 a first square through shutoff valve; 145 fourth manual flat valve body; 146 a second double-scale sulfur-proof and shock-proof pressure gauge; 148 second square through stop valve
200 tubing head body; 202 a third bolt and nut assembly; 205 a fifth manual plate valve; 206 sixth manual plate valve; 207 a seventh manual plate valve; 208 an eighth manual plate valve; 209 a second threaded flange; 210 a fourth bolt and nut assembly; 214 a tubing hanger; 216 a pipeline installation component; 218 a jackscrew assembly; 219 a jackscrew body; 220 jack screw support rings; 221 jackscrew packing; 222, pressing a ring by a jackscrew; 223 pressing the cap with a top thread; 227 first grease injection and pressure test component; 228 a second grease injection and pressure test component; 229 a third greasing pressure test assembly; 231 a first seal; 232 a second seal; 233 a third seal; 234 a fourth seal; 235 a fifth seal; 2351 a first upper metal seal ring, 2352 a first lower metal seal ring, 2353 a first metal press ring; 2354 a first P-ring seal; 236 a sixth seal; 237 a seventh seal; 2371 a second upper metal seal ring; 2372 a second lower metal seal ring; 2373 a second metal compression ring; 2374 second P-ring seal; 238 an eighth seal;
255 a fifth manual plate valve body; 261 third square right angle stop valve; 265 a sixth manual plate valve body; 275 a seventh manual plate valve body; 277 second instrument flange; 281 a fourth square right-angle stop valve; 285 eighth manual flat valve body; 38 neck flange.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The ultrahigh-pressure ultrahigh-temperature high-sulfur-resistance HH-grade gas production wellhead device shown in the figures 1-7 sequentially comprises a gas production tree device and a tubing head device from top to bottom;
the gas tree production device comprises an upper flange 105, a first manual flat valve 101, a hydraulic safety valve 106 and a small four-way joint 100, wherein the upper end of the upper flange 105 is connected with the first manual flat valve 101, the upper end of the first manual flat valve 101 is connected with the hydraulic safety valve 106 through a first bolt and nut assembly 109 and a first threaded flange 107, the upper end of the hydraulic safety valve 106 is connected with the small four-way joint 100 through a first threaded flange 108 and a second bolt and nut assembly 110, the left side bypass of the small four-way joint 100 is connected with a second manual flat valve 102 through the first threaded flange 108 and the second bolt and nut assembly 110, the right side bypass of the small four-way joint 100 is connected with a third manual flat valve 103 through the first threaded flange 108 and the second bolt and nut assembly 110, and the upper end of the small four-way joint 100 is connected with a fourth manual flat valve 104 through the first threaded flange 108 and the second bolt and nut assembly 110;
the tubing head device comprises a tubing head body 200, a tubing hanger 214 is arranged at the upper end in the tubing head body 200, and a first sealing element 231, a group of second sealing elements 232 and a third sealing element 233 are arranged between the inner side of the upper flange 105 and the outer side of the upper end of the tubing hanger 214; a set of fourth and fifth seals 234, 235 is provided between the inside of the tubing head body 200 and the outside of the lower end of the tubing hanger 214. The tubing hanger 214 is provided at both ends with a line channel 215, and the upper and lower portions of the line channel are provided with line fixing joints 216.
In addition, the ultrahigh-pressure ultrahigh-temperature high-sulfur-resistance HH-grade gas production wellhead device also comprises a casing head device; the casing head device is arranged at the bottom of the oil pipe head device; the casing head device adopted by the HH-grade gas production wellhead device with ultrahigh pressure, ultrahigh temperature and high sulfur resistance refers to the prior art, and the structure of the casing head device is not described in detail herein.
A fifth manual flat valve 205 and a sixth manual flat valve 206 are arranged on the left side bypass of the oil pipe head body 200, and a seventh manual flat valve 207 and an eighth manual flat valve 208 are respectively arranged on the right side bypass of the oil pipe head body 200; the flange at the lower end of the tubing head body 200 is connected with the neck flange 38 through a third bolt and nut assembly 202; a sixth seal 236, a seventh seal 237 and an eighth seal 238 are disposed between the tubing head body 200 and the neck flange 38.
Further, in the above structure, the second manual flat valve 102 includes a second manual flat valve body 125, one end of the second manual flat valve body 125 opposite to the small four-way joint 100 is connected to the first fixed throttle 122 through the first threaded flange 107 and the first bolt-and-nut assembly 109, and the first square right-angle stop valve 121 is further connected to the first fixed throttle 122 through the first threaded flange 107 and the first bolt-and-nut assembly 109; the third manual flat valve 103 comprises a third manual flat valve body 135, one end of the third manual flat valve body 135, opposite to the small four-way valve 100, is connected with a second fixed throttle valve 132 through a first instrument flange 137, the second fixed throttle valve 132 is further connected with a second square right-angle stop valve 131 through a first threaded flange 107 and a first bolt-nut assembly 109, and a first square through stop valve 138 and a first double-scale sulfur-proof shock-resistant pressure gauge 136 are arranged above the first instrument flange 137; the fourth manual flat valve 104 comprises a fourth manual flat valve body 145, and one end, opposite to the small four-way, of the fourth manual flat valve body 145 is connected with a second square through stop valve 148 and a second double-scale sulfur-proof shock-proof pressure gauge 146 through a first threaded flange 107 and a first bolt-nut assembly 109.
Further, in the above structure, the fifth manual flat valve 205 includes a fifth manual flat valve body 255, the sixth manual flat valve 206 includes a sixth manual flat valve body 265, one end of the fifth manual flat valve body 255 is connected to the oil head body 200 through the second threaded flange 201 and the fourth bolt and nut assembly 210, the opposite end is connected to the sixth manual flat valve body 265 through the second threaded flange 209 and the third bolt and nut assembly 202, and the opposite end of the sixth manual flat valve body 265 and the fifth manual flat valve body 255 is connected to the third square cut-off valve 261 through the second threaded flange 209 and the third bolt and nut assembly 202; the seventh manual flat valve 207 comprises a seventh manual flat valve body 275, the eighth manual flat valve 208 comprises an eighth manual flat valve body 285, one end of the seventh manual flat valve 207 is connected with the oil pipe head body 200 through the second threaded flange 201 and the fourth bolt and nut assembly 210, the opposite end is connected with the eighth manual flat valve body 285 through the second instrument flange 277, and the opposite end of the eighth manual flat valve body 285 and the seventh manual flat valve 207 is connected with the fourth square right-angle stop valve 281 through the second threaded flange 209 and the third bolt and nut assembly 202; and a third square straight-through stop valve 278 and a third double-scale sulfur-proof shock-resistant pressure gauge 276 are arranged above the second instrument flange 277.
Further, in the above structure, a grease injection pressure test pore channel i is radially formed in the upper flange 105, and first grease injection pressure test components 227 are respectively mounted at outer ports of the grease injection pressure test pore channel i; the flange at the upper end of the oil pipe head body 200 is provided with two pipeline channels along the radial direction, the outer ports of the pipeline channels are respectively provided with a group of pipeline installation components 216, and the pipeline installation components 216 are clamping joints or screwed plugs and perforation pressure caps and are used for installing and fixing pipelines so that the pipelines pass through the middles of the pipeline installation components 216; one end of the pipeline passes out of the pipeline installation assembly 216 to be connected to the control system, the pipeline passes through the pipeline passage 215, and the other end is connected to a downhole safety valve. A jackscrew channel is also radially opened from the flange at the upper end of the tubing head body 200 at the lower end of the wiring duct, and a jackscrew assembly 218 is installed in the jackscrew channel. Further, in the above structure, two grease injection pressure test channels ii are radially formed in the flange at the lower end of the tubing head body 200, and a group of second grease injection pressure test assemblies 228 are respectively mounted at the outer ports of the grease injection pressure test channels ii; the lower end of the neck flange 38 is provided with two grease injection pressure test hole channels III along the radial direction, and the outer ports of the grease injection pressure test hole channels III are respectively provided with a group of third grease injection pressure test assemblies 229; a sixth sealing element 236 is connected in the grease injection pressure test hole II, and an eighth sealing element 238 is connected in the grease injection pressure test hole II; the first, second and third grease injection and pressure test components 227, 228 and 229 all comprise a plug connector and a grease injection and pressure test valve.
Further, in the above structure, the fourth sealing element 234 is an O-shaped non-metallic sealing ring made of modified polytetrafluoroethylene; the fifth sealing element 235 is composed of a first upper metal sealing ring 2351, a first lower metal sealing ring 2352, a first metal press ring 2353 and a first P-shaped sealing ring 2354; the seventh sealing element 237 is composed of a second upper metal sealing ring 2371, a second lower metal sealing ring 2372, a second metal pressing ring 2373 and a second P-type sealing ring 2374; the first sealing element 231, the third sealing element 233 and the eighth sealing element 238 are octagonal ring metal steel rings; the sixth sealing element 236 and the eighth sealing element 238 are non-metal BT sealing ring structures made of modified polytetrafluoroethylene.
Further, in the above structure, the jack screw assembly 218 includes a jack screw body 219, a jack screw support ring 220, a jack screw filler 221, a jack screw pressing ring 222 and a jack screw pressing cap 223; the jackscrew body 219 is sequentially connected with a jackscrew support ring 220, a jackscrew filler 221 and a jackscrew pressing ring 222, and a jackscrew pressing cap 223 is arranged on the right side of the jackscrew body 219; the end part of the jackscrew body 219 extends to the shoulder inclined plane of the oil pipe hanger, and the jackscrew body 219 is connected with the oil pipe hanger 214 in a conical surface matching mode.
Further, in the above structure, the first bolt-nut assembly 109 includes a stud bolt, a nut, and a gasket ring; the second bolt-and-nut assembly 110 comprises a threaded bolt, a nut and a gasket ring; the third bolt-nut assembly 202 comprises a stud, a nut, and a gasket ring; the fourth bolt-and-nut assembly 210 includes a drop bolt, a nut, and a gasket ring.
In the structure, the pressure-bearing part of the ultrahigh-pressure ultrahigh-temperature high-sulfur-resistance HH-grade gas production wellhead device is prepared from low alloy steel 4130 and nickel-based alloy 725, which can bear ultrahigh pressure, resist high temperature and resist sulfur, sealing surfaces in contact with media are formed by build-up welding of hard alloy inconel 625, and the thickness of a welding layer is not less than 3.5 mm. Specifically, the oil pipe head body, the small four-way joint, the valve bodies and valve covers of all valves and all flanges are prepared from high-temperature-resistant high-sulfur-resistant low alloy steel 4130; all the bolt and nut components, the jackscrew components except the jackscrew filler and the plug joints are made of inconel 725 material; all the metal sealing rings are made of inconel 825 alloy materials; all non-metallic sealing elements/rings are made of modified polytetrafluoroethylene materials, and have good sealing effect at the temperature below 300 ℃. The modified polytetrafluoroethylene is prepared from polytetrafluoroethylene, fluororubber, phenolic epoxy resin, a vulcanizing agent, bronze powder, graphene and molybdenum disulfide. The vulcanizing agent consists of a vulcanizing agent PDM, sulfur and white carbon.
Further, the ultrahigh-pressure ultrahigh-temperature high-sulfur-resistance HH-grade gas production wellhead device is subjected to hydrostatic pressure experiments, and the rated working pressure is 105 MPa. Specifically, the gas production tree device hydrostatic pressure test process is as follows: (1) the gas production tree device which is completely assembled by adopting the device which is subjected to the body hydrostatic pressure strength test only needs to be tested to the rated working pressure (105 MPa); the pressure is increased from zero to 105MPa, and the pressure stabilizing time is not less than 3 min; (2) the pressure drops to zero; (3) the pressure is increased to 105MPa again, and the pressure stabilizing time is not less than 15 min; (4) the experimental results are as follows: no leakage was visible.
Specifically, the hydrostatic test process of the tubing head device is as follows: (1) the oil pipe four-way joint which is completely assembled by adopting the device which is subjected to the body hydrostatic strength test only needs to be tested to the rated working pressure (105 MPa), the pressure is increased to 105MPa from zero, and the pressure stabilizing time is not less than 3 min; (2) the pressure drops to zero; (4) the pressure is increased to 105MPa again, and the pressure stabilizing time is not less than 15 min; (4) the experimental results are as follows: no leakage was visible.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.
Claims (10)
1. The utility model provides a high anti sulphur HH level gas production wellhead assembly of superhigh pressure superhigh temperature which characterized in that: the gas production tree device and the tubing head device are sequentially arranged from top to bottom;
the gas tree production device comprises an upper flange (105), a first manual flat valve (101), a hydraulic safety valve (106) and a small four-way joint (100), wherein the upper end of the upper flange (105) is connected with the first manual flat valve (101), the upper end of the first manual flat valve (101) is connected with the hydraulic safety valve (106) through a first bolt-nut component (109) and a first threaded flange (107), the upper end of the hydraulic safety valve (106) is connected with the small four-way joint (100) through a first screw thread flange (108) and a second bolt-nut component (110), the left side of the small four-way joint (100) is connected with a second manual flat valve (102) through the first screw thread flange (108) and the second bolt-nut component (110), the right side of the small four-way joint (100) is connected with a third manual flat valve (103) through the first screw thread flange (108) and the second bolt-nut component (110), the upper end of the small four-way valve (100) is connected with a fourth manual flat valve (104) through a first threaded flange (108) and a second bolt-nut assembly (110);
the tubing head device comprises a tubing head body (200), a tubing hanger (214) is arranged at the upper end in the tubing head body (200), and a first sealing element (231), a group of second sealing elements (232) and a third sealing element (233) are arranged between the inner side of the upper flange (105) and the outer side of the upper end of the tubing hanger (214); a group of fourth sealing elements (234) and fifth sealing elements (235) are arranged between the inner side of the tubing head body (200) and the outer side of the lower end of the tubing hanger (214);
a fifth manual flat valve (205) and a sixth manual flat valve (206) are arranged on the left bypass of the oil pipe head body (200), and a seventh manual flat valve (207) and an eighth manual flat valve (208) are respectively arranged on the right bypass of the oil pipe head body (200); a flange at the lower end of the oil pipe head body (200) is connected with a neck flange (38) through a third bolt and nut assembly (202); and a sixth seal (236), a seventh seal (237) and an eighth seal (238) are arranged between the tubing head body (200) and the neck flange (38).
2. The ultrahigh pressure and temperature high sulfur resistance HH grade gas production wellhead assembly of claim 1, characterized in that: the second manual flat valve (102) comprises a second manual flat valve body (125), one end, opposite to the small four-way joint (100), of the second manual flat valve body (125) is connected with a first fixed throttle valve (122) through a first threaded flange (107) and a first bolt-nut assembly (109), and the first fixed throttle valve (122) is further connected with a first square right-angle stop valve (121) through the first threaded flange (107) and the first bolt-nut assembly (109); the third manual flat valve (103) comprises a third manual flat valve body (135), one end, opposite to the small four-way valve (100), of the third manual flat valve body (135) is connected with a second fixed throttle valve (132) through a first instrument flange (137), the second fixed throttle valve (132) is further connected with a second square right-angle stop valve (131) through a first threaded flange (107) and a first bolt and nut assembly (109), and a first square through stop valve (138) and a first double-scale sulfur-proof anti-seismic pressure gauge (136) are arranged above the first instrument flange (137); the fourth manual flat valve (104) comprises a fourth manual flat valve body (145), and one end, opposite to the small four-way valve body (145), of the fourth manual flat valve body is connected with a second square through stop valve (148) and a second double-scale sulfur-proof shock-proof pressure gauge (146) through a first threaded flange (107) and a first bolt-nut assembly (109).
3. The ultrahigh pressure and temperature high sulfur resistance HH grade gas production wellhead assembly of claim 1, characterized in that: the fifth manual flat valve (205) comprises a fifth manual flat valve body (255), the sixth manual flat valve (206) comprises a sixth manual flat valve body (265), one end of the fifth manual flat valve body (255) is connected with the oil pipe head body (200) through a second threaded flange (201) and a fourth bolt and nut assembly (210), the other opposite end of the fifth manual flat valve body (255) is connected with the sixth manual flat valve body (265) through a second threaded flange (209) and a third bolt and nut assembly (202), and the other opposite end of the sixth manual flat valve body (265) and the fifth manual flat valve body (255) is connected with a third square cut-off valve (261) through a second threaded flange (209) and a third bolt and nut assembly (202); the seventh manual flat valve (207) comprises a seventh manual flat valve body (275), the eighth manual flat valve (208) comprises an eighth manual flat valve body (285), one end of the seventh manual flat valve (207) is connected with the oil pipe head body (200) through a second threaded flange (201) and a fourth bolt and nut assembly (210), the other opposite end of the seventh manual flat valve (207) is connected with the eighth manual flat valve body (285) through a second instrument flange (277), and the other opposite end of the eighth manual flat valve body (285) and the seventh manual flat valve (207) is connected with a fourth right-angle square stop valve (281) through a second threaded flange (209) and a third bolt and nut assembly (202); and a third square through stop valve (278) and a third double-scale sulfur-proof shock-proof pressure gauge (276) are arranged above the second instrument flange (277).
4. The ultrahigh pressure and temperature high sulfur resistance HH grade gas production wellhead assembly of claim 1, characterized in that: the flange at the upper end of the tubing head body (200) is provided with two pipeline channels along the radial direction, the outer ports of the pipeline channels are respectively provided with a group of pipeline installation components (216), and the pipeline installation components (216) are clamping joints or screwed plugs and perforation pressure caps and are used for installing and fixing pipelines so that the pipelines pass through the middles of the pipeline installation components (216); and a jackscrew channel is further formed in the flange at the upper end of the tubing head body (200) along the radial direction, the jackscrew channel is arranged at the lower end of the wiring hole, and a jackscrew assembly (218) is installed in the jackscrew channel.
5. The ultrahigh pressure and temperature high sulfur resistance HH grade gas production wellhead assembly of claim 1, characterized in that: a grease injection pressure test pore channel I is formed in the upper flange (105) along the radial direction, and a first grease injection pressure test component (227) is mounted at the outer end opening of the grease injection pressure test pore channel I; two grease injection pressure test channels II are formed in a flange at the lower end of the tubing head body (200) along the radial direction, and a group of second grease injection pressure test assemblies (228) are respectively mounted at outer ports of the two grease injection pressure test channels II; the lower end of the neck flange (38) is provided with two grease injection pressure test hole channels III along the radial direction, and the outer ports of the grease injection pressure test hole channels III are respectively provided with a group of third grease injection pressure test assemblies (229); a sixth sealing element (236) is connected in the grease injection pressure test hole II, and an eighth sealing element (238) is connected in the grease injection pressure test hole II; the second grease injection and pressure test assembly (228) and the third grease injection and pressure test assembly (229) comprise a plug connector and a grease injection and pressure test valve.
6. The ultrahigh pressure and temperature high sulfur resistance HH grade gas production wellhead assembly of claim 1, characterized in that: the fourth sealing element (234) is an O-shaped non-metal sealing ring made of a modified polytetrafluoroethylene material; the fifth sealing element (235) consists of a first upper metal sealing ring (2351), a first lower metal sealing ring (2352), a first metal pressing ring (2353) and a first P-shaped sealing ring (2354); the seventh sealing element (237) is composed of a second upper metal sealing ring (2371), a second lower metal sealing ring (2372), a second metal pressing ring (2373) and a second P-shaped sealing ring (2374); the first sealing element (231), the third sealing element (233) and the eighth sealing element (238) are octagonal ring metal steel rings; the sixth sealing element (236) and the eighth sealing element (238) are both BT sealing ring structures made of modified polytetrafluoroethylene materials.
7. The ultrahigh pressure and temperature high sulfur resistance HH grade gas production wellhead assembly according to claim 4, characterized in that: the jackscrew assembly (218) comprises a jackscrew body (219), a jackscrew support ring (220), a jackscrew filler (221), a jackscrew pressing ring (222) and a jackscrew pressing cap (223); the jackscrew body (219) is sequentially connected with the jackscrew support ring (220), the jackscrew filler (221) and the jackscrew pressing ring (222), and a jackscrew pressing cap (223) is arranged on the right side of the jackscrew body (219); the end part of the jackscrew body (219) extends to the shoulder inclined plane of the oil pipe hanger, and the jackscrew body (219) is connected with the oil pipe hanger (214) in a conical surface matching mode.
8. The ultrahigh pressure and temperature high sulfur resistance HH grade gas production wellhead assembly of claim 1, characterized in that: the first bolt and nut assembly (109) comprises a stud, a nut and a gasket ring; the second bolt-and-nut assembly (110) comprises a threaded bolt, a nut and a sealing gasket ring; the third bolt-nut assembly (202) comprises a stud, a nut, and a gasket ring; the fourth bolt-and-nut assembly (210) comprises a threaded bolt, a nut and a sealing grommet.
9. The ultrahigh pressure and temperature high sulfur resistance HH grade gas production wellhead assembly of claim 1, characterized in that: the bearing part of the ultrahigh-pressure ultrahigh-temperature high-sulfur-resistance HH-grade gas production wellhead device is prepared from low alloy steel and nickel-based alloy 725 which can bear ultrahigh pressure, resist high temperature and resist sulfur, and the sealing surface in contact with a medium is formed by surfacing welding with hard alloy inconel 625.
10. The ultra-high pressure and temperature-high sulfur-resistant HH grade gas production wellhead assembly of any of claims 1 to 9, wherein: the ultrahigh-pressure ultrahigh-temperature high-sulfur-resistance HH-grade gas production wellhead device is subjected to hydrostatic pressure experiments, and the rated working pressure is 105 MPa.
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| CN202110452438.3A CN113187425B (en) | 2021-04-26 | 2021-04-26 | Superhigh pressure superhigh temperature high sulfur-resistant HH-level gas production wellhead device |
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| CN117468910A (en) * | 2023-10-30 | 2024-01-30 | 江苏宏泰石化机械有限公司 | Multistage easy-to-detach gas production wellhead convenient for filtering natural gas impurities |
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| CN117468910A (en) * | 2023-10-30 | 2024-01-30 | 江苏宏泰石化机械有限公司 | Multistage easy-to-detach gas production wellhead convenient for filtering natural gas impurities |
| CN117468910B (en) * | 2023-10-30 | 2024-04-26 | 江苏宏泰石化机械有限公司 | Multistage easy-to-detach gas production wellhead convenient for filtering natural gas impurities |
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