CN113513284A - Compact shale gas production wellhead assembly - Google Patents
Compact shale gas production wellhead assembly Download PDFInfo
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- CN113513284A CN113513284A CN202110996172.9A CN202110996172A CN113513284A CN 113513284 A CN113513284 A CN 113513284A CN 202110996172 A CN202110996172 A CN 202110996172A CN 113513284 A CN113513284 A CN 113513284A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 39
- 238000007789 sealing Methods 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 13
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229920000459 Nitrile rubber Polymers 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229920001973 fluoroelastomer Polymers 0.000 claims description 3
- 229920006168 hydrated nitrile rubber Polymers 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 229920006395 saturated elastomer Polymers 0.000 claims description 2
- 238000009530 blood pressure measurement Methods 0.000 abstract description 5
- 230000009194 climbing Effects 0.000 abstract description 3
- 239000003208 petroleum Substances 0.000 abstract description 2
- 230000002146 bilateral effect Effects 0.000 abstract 1
- 210000000664 rectum Anatomy 0.000 abstract 1
- 239000000306 component Substances 0.000 description 14
- 239000004519 grease Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000008358 core component Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000002310 elbow joint Anatomy 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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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
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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
- 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
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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)
- Valve Housings (AREA)
Abstract
The invention relates to the technical field of petroleum machinery, in particular to a compact shale gas production wellhead device, and solves the problems that in the prior art, the shale gas production wellhead device is large in size, a control valve is high, and climbing and operation are difficult. The utility model provides a compact shale gas production well head device, includes and is formed by the combination of the gas production tree of top and two big parts of oil pipe head below, the gas production tree big part uses the cross disjunctor valves as the core, first screw thread formula flange, table joint and first pressure measurement subassembly are installed in proper order to the top of cross disjunctor valves, and the below of cross disjunctor valves is connected with the oil pipe head through big latus rectum main valve, the bilateral symmetry of cross disjunctor valves installs corner joint, first instrument flange, manual choke valve and second pressure measurement subassembly, oil pipe head big part uses oil pipe head cross as the carrier. The invention has the characteristics of small volume, light weight, low height, easy operation, long service life and the like.
Description
Technical Field
The invention relates to the technical field of petroleum machinery, in particular to a compact shale gas production wellhead device.
Background
With the increasing exhaustion of conventional oil and gas resources, the exploitation scale of shale gas is larger and larger. Because the shale gas adopts a horizontal well, the exploitation method of firstly fracturing and then exploiting gas is obviously different from the exploitation method of firstly self-injecting and then excavating and submerging of a vertical well of a conventional oil gas resource, and the adopted wellhead equipment is also different. Which includes a shale gas production wellhead.
The existing shale gas production wellhead device has the characteristics of high pressure, large drift diameter and new structure.
However, the existing shale gas production wellhead device has the problems of large product volume, high control valve, difficult climbing and operation and the like, so the shale gas production wellhead device is provided to solve the problems.
Disclosure of Invention
The invention aims to provide a compact shale gas production wellhead device, and solves the problems that in the prior art, the shale gas production wellhead device is large in size, a control valve is high, and climbing and operation are difficult.
In order to achieve the purpose, the invention adopts the following technical scheme:
a compact shale gas production wellhead device is formed by combining two large parts, namely a gas production tree above and a tubing head below, wherein the large parts of the gas production tree use a diagonal four-way connected valve group as a core, a first threaded flange, a meter connector and a first pressure measuring assembly are sequentially installed above the diagonal four-way connected valve group, the lower part of the diagonal four-way connected valve group is connected with the tubing head through a large-diameter main valve, bent pipe connectors, a first instrument flange, a manual throttle valve and a second pressure measuring assembly are symmetrically installed on two sides of the diagonal four-way connected valve group, the tubing head large part uses a tubing head four-way as a carrier, a tubing hanger is installed in a central hole of the tubing head four-way, and two manual wing valves, a second instrument flange, a third pressure measuring assembly, a second threaded flange and a tubing plug are symmetrically installed on two sides of the tubing hanger.
Preferably, the skew four-way connection valve bank is formed by combining a valve bank valve body and four identical flat valve assemblies.
Preferably, the lower part of the valve body of the oblique cross four-way connected valve bank is a large flange with a neck, the upper part of the valve body is a columnar body with flat two sides and right-angled protrusions, the center of the valve body is an upper channel hole and a lower channel hole, the two sides of the valve body of the oblique cross four-way connected valve bank are flow distribution channel holes with included angles of 45 degrees with the upper channel hole and the lower channel hole, the channel orifices are respectively positioned on the inclined planes of the upper plane, the lower plane, the upper left side and the upper right side, a trapezoidal gasket ring groove and uniformly distributed threaded blind holes or stud through holes are processed around the four channel orifices, the front side of the flat columnar body of the oblique cross four-way connected valve bank is provided with four blind hole valve cavities perpendicular to the channel space relative to the four channel holes, and the four blind hole valve cavities are provided with a trapezoidal gasket ring groove and uniformly distributed threaded blind holes.
Preferably, the skew four-way connection valve group comprises four sets of flat valve assemblies which are all parts of a manual hidden rod flat valve with an umbrella-shaped gear driver and a switch indicator.
Preferably, the large-diameter main valve is a manual ball screw rising stem flat valve, and the diameter of the valve is larger than the outer diameter of the oil pipe hanger.
Preferably, the four manual wing valves in the large part of the oil pipe head are all manual hidden-rod flat valves with umbrella-shaped gear drivers and switch indicators.
Preferably, the tubing hanger is a mandrel tubing hanger component with two sealed ends and no extension neck, and the tubing hanger is formed by combining a hanger main body, three elastic sealing rings, a wedge-shaped metal sealing ring, a metal gasket, a round nut and a set screw.
Preferably, the hanger main part is hollow column part, and the center is the through-hole to the taper hole screw thread form is all seted up at the both ends of through-hole, and the peripheral follow-up of hanger main part column is processed into degressive longer cylinder of diameter, cone, shorter cylinder, screw cylinder and cylinder in proper order, and the middle V-arrangement groove that has one 90 degrees that has cut on the longer cylinder, and two rectangle recesses have been seted up to the top in V-arrangement groove, and one rectangle recess has been seted up to the below in V-arrangement groove.
Preferably, the three elastic sealing rings are FS type elastic sealing rings, the material of the elastic sealing rings is 'FKM fluororubber' or 'HNBR high-saturation hydrogenated nitrile rubber', and two elastic steel wire rings are respectively arranged at two shoulders of the protruding ends of the elastic sealing rings.
The invention has at least the following beneficial effects:
because the core component of the gas production tree is the oblique cross four-way connected valve group, the invention is a new component formed by connecting six parts, namely the reducing joint, the safety valve, the small four-way valve, the top valve, the wing valves at two sides and the six independent parts in the existing product; it cancels the original neck flange and the connecting piece and the sealing piece among the neck flange which are butted at five positions among six parts; therefore, the volume and the weight of the product are greatly reduced, and the risk of high-pressure leakage at a plurality of interfaces is reduced. The oblique cross four-way connected valve group also equally divides the original left and right pipelines with right angle turns into two pipelines with 45-degree oblique angle turns, which can greatly reduce the flow resistance of shale airflow and the abrasion to a gas production tree, thereby prolonging the service life of the whole product. A large-drift-diameter main valve is connected with the large part of the tubing head below the gas production tree, and a mandrel type tubing hanger can be directly installed through the large-drift-diameter main valve so as to meet the process requirements of shale gas drilling and production. In addition, four sets of flat valve components in the oblique four-way connected valve group and four manual wing valves in the large part of the oil pipe head are all manual hidden rod flat valve structures with bevel gear drivers and switch indicators, so that the transmission ratio leverage effect of the bevel gear drivers can be utilized, and the operation resistance is greatly reduced; and the opening and closing conditions of the valve can be clearly and conveniently observed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic front view of the present invention in partial cross-section;
FIG. 2 is a schematic side view of the present invention in partial cross-section;
FIG. 3 is an enlarged view of the tubing hanger assembly of the present invention.
In the figure: 1. the skew four-way valve bank; 101. a valve block valve body; 102. a flat plate valve assembly; 2. a pipe bending joint; 3. a first instrument flange; 4. a manual throttle valve; 5. a second pressure measurement assembly; 6. a meter connector; 7. a first threaded flange; 8. a large-bore main valve; 9. a second instrument flange; 10. the tubing head cross; 11. a manual wing valve; 12. pipe blocking; 13. an oil pipe hanger; 1301. a hanger body; 1302. an elastic sealing ring; 1303. a wedge-shaped metal seal ring; 1304. a metal washer; 1305. a round nut; 1306. tightening the screw; 14. a first pressure measurement assembly; 15. a third pressure measurement assembly; 16. a second threaded flange.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
Referring to fig. 1-3, the invention relates to a compact shale gas production wellhead device, which is formed by combining two large parts, namely an upper gas production tree and a lower tubing head. The first threaded flange 7, the second threaded flange 16 and the pipe plug 12 used in the gas production tree and the oil pipe head are the same parts; the used first pressure measuring component 14, the second pressure measuring component 5 and the third pressure measuring component 15 are also the same in structure and are composed of a double short and male joint at the lower part, a stop valve at the middle part and a pressure gauge at the upper part, and the pressure gauges are shock-resistant and sulfur-resistant pressure gauges. In the invention, the flow passage holes, the pressure cavity and the flange butt joint parts of all parts are connected by adopting stud nuts with corresponding specification and size and a metal sealing gasket ring so as to prevent the damage and corrosion of pressure airflow.
The gas production tree big component above the invention is formed by combining an oblique cross four-way connection valve group 1, a bent pipe joint 2, a first instrument flange 3, a manual throttle valve 4, a first pressure measuring component 14, an instrument joint 6, a threaded flange, a large-diameter main valve 8, a stud nut with smaller specification and size and a sealing gasket ring. Core components of the gas production tree: the oblique four-way conjoined valve group 1 is formed by combining a valve group valve body 101 and four sets of same flat valve components 102, and plays the roles of a reducer union, a safety valve, a small four-way valve, a top valve and two side wing valves in a conventional gas production tree. In the oblique cross four-way connected valve group 1, a neck large flange is arranged below a valve group valve body 101-, a flat columnar body with right-angled bulges at two sides is arranged above the valve group valve body, an upper channel hole and a lower channel hole are arranged in the center, a flow distribution channel hole with an included angle of 45 degrees with the upper channel hole and the lower channel hole is arranged on the left side and the right side, and four channel orifices are respectively positioned on an inclined plane of the upper plane, the lower plane, the left side and the right side; a trapezoidal gasket ring groove and uniformly distributed threaded blind holes or stud through holes are processed around the four channel orifices and are used for connecting outwards; four blind hole valve cavities vertical to the four channel holes are processed in front of the flat columnar body, a trapezoidal cushion ring groove and uniformly distributed threaded blind holes are processed around the four blind hole valve cavity openings, a set of flat valve component 102 except the valve body and four flashboards in the flat valve component 102 are respectively installed by using a stud nut and a sealing cushion ring with smaller specification and size, and the four channel holes in the valve body 101 of the valve group are respectively controlled. In the skew four-way connected valve group 1, four sets of flat valve components 102 are all parts of a manual hidden rod flat valve with an umbrella-shaped gear driver and a switch indicator, namely, the umbrella-shaped gear driver drives a valve rod and a flashboard to move, and the switch indicator arranged at the outer end of the umbrella-shaped gear driver is used for visually displaying the reciprocating position of the flashboard.
In order to meet the requirement of shale gas exploitation work, a first threaded flange 7, a meter connector 6 and a first pressure measuring assembly 14 are sequentially arranged above the oblique four-way connected valve group 1 and used for measuring the working pressure in a main channel; the lower part of the skew four-way connection valve group 1 is connected with an oil pipe head through a main valve 8 with a large drift diameter; the left side and the right side of the oblique four-way connected valve group 1 are respectively provided with an elbow joint 2, a first instrument flange 3, a manual throttle valve 4 and a second pressure measuring assembly 5, and the output of shale gas is controlled while the pressure of a channel is measured. The large-drift-diameter main valve 8 used in the invention is a manual ball screw rising stem flat valve, and the drift diameter of the valve is larger than the outer diameter of the oil pipe hanger 13, so that the oil pipe hanger 13 can be conveniently installed; the front end of the valve is provided with a driving hand wheel and a ball screw pair which are used for reducing the operation resistance of the valve; the rear end of the valve is provided with a tail rod which extends out and moves in the slotted shield to display the opening and closing conditions of the valve.
The large part of the oil pipe head below the oil pipe joint is formed by combining an oil pipe head four-way joint 10, a manual wing valve 11, a second instrument flange 9, a third pressure measuring assembly 15, a second threaded flange 16, a pipe plug 12, a grease injection valve, a BT sealing ring, a pressure relief valve, a locking part, an oil pipe hanger 13, a stud nut with small specification and size and a sealing gasket ring. The upper part and the lower part of the tubing head cross 10 are large flanges, and the middle part is a large part of a hollow cylinder; the end surfaces of the upper and lower large flanges are connected with a gas production tree and a casing head by a stud nut and a sealing gasket ring; a plurality of step through holes with threads at the inlet and the outlet are symmetrically processed on the circumferential side wall of the upper large flange, and a locking part is arranged in each step through hole and used for locking the oil pipe hanger 13; step through holes with threads at upper and lower inlets are symmetrically processed on the circumferential side wall of the lower large flange, a grease injection valve is arranged in each step through hole at one side, a pressure relief valve is arranged in each step through hole at the other side, and the pressure relief valves are used for injecting sealing grease into a BT sealing ring in an inner hole groove and connecting and sealing a sleeve protruding from a large part of an external sleeve head; two sides of a hollow cylinder in the middle of the four-way joint 10 of the oil pipe head are symmetrically processed into a plane, a channel hole, a trapezoidal gasket ring groove and uniformly distributed threaded blind holes, and two manual wing valves 11, a second instrument flange 9 clamped between the two valves, a second threaded flange 16 outside the two valves and a pipe plug 12 are respectively connected by using a stud nut and a sealing gasket ring with smaller specification and size; above the second instrument flange 9, a third pressure measuring assembly 15 is arranged for measuring the operating pressure in the channel. An oil pipe hanger 13 is fixed at the center of the four-way joint 10 of the oil pipe head by a circular truncated cone step hole and locking parts uniformly distributed on the circumference of a large flange above the circular truncated cone step hole.
In the large part of the oil pipe head, four manual wing valves 11 used on the left side and the right side are manual hidden rod flat valves with bevel gear drivers and switch indicators, namely, the bevel gear drivers drive the valve rods and the flashboards to move, and the switch indicators arranged at the outer ends of the bevel gear drivers are used for visually displaying the reciprocating positions of the flashboards.
The oil pipe hanger 13 in the large part of the oil pipe head is a mandrel type oil pipe hanger part with two sealed ends and no lengthening neck; the suspension is composed of a hanger body 1301, three elastic sealing rings 1302, a wedge-shaped metal sealing ring 1303, a metal washer 1304, a round nut 1305 and a set screw 1306. In the oil pipe hanger 13, a hanger main body 1301 is a hollow cylindrical part, the center of the hanger main body is provided with a through hole, and both ends of the through hole are processed into taper hole threads which are respectively used for connecting an external oil pipe and a drill rod; the periphery of the cylindrical body is sequentially processed into a longer cylinder, a cone, a shorter cylinder, a screw cylinder and a cylinder with the diameter decreasing from top to bottom; a 90-degree V-shaped groove is cut in the middle of the longer cylinder with the thickest excircle so as to be convenient for fixing the locking component; two rectangular grooves are cut above the V-shaped groove, one rectangular groove is cut below the V-shaped groove, and elastic sealing rings 1302 are arranged in the rectangular grooves; a wedge-shaped metal sealing ring 1303 is arranged on the cone and used as a main seal at the lower end; a metal gasket 1304 is arranged on the shorter cylinder, and the metal gasket 1304 is pressed tightly by the gravity of the oil pipe by utilizing the chamfer angle at the lower edge of the metal gasket 1304 to be matched with the circular truncated cone step hole at the center of the four-way pipe head 10; a round nut 1305 is arranged on the screw column body and is fixed by a set screw 1306-to prevent the upper part from falling off; the lowermost cylinder, is the length extension of the hanger body 1301-.
The three elastomeric seals 1302 used in the tubing hanger 13 component of the present invention are all FS-type elastomeric seals; the main material is FKM fluororubber or HNBR high saturated hydrogenated nitrile rubber, and elastic steel wire rings are respectively embedded at two shoulders of the convex end of the main material to enhance the compression resistance, corrosion resistance and sealing performance of the main material.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A compact shale gas production wellhead device is formed by combining two large components, namely an upper gas production tree and a lower oil pipe head, and is characterized in that the large components of the gas production tree take an oblique four-way conjoined valve group (1) as a core, a first threaded flange (7), a meter connector (6) and a first pressure measuring assembly (14) are sequentially arranged above the oblique four-way conjoined valve group (1), the lower part of the oblique four-way conjoined valve group (1) is connected with the oil pipe head through a large-diameter main valve (8), elbow connectors (2), a first meter flange (3), a manual throttle valve (4) and a second pressure measuring assembly (5) are symmetrically arranged on two sides of the oblique four-way conjoined valve group (1), the large components of the oil pipe head take the oil pipe head four-way valve (10) as a carrier, and an oil pipe hanger (13) is arranged in a central hole of the oil pipe head four-way valve (10), two manual wing valves (11), a second instrument flange (9), a third pressure measuring component (15), a second threaded flange (16) and a pipe plug (12) are symmetrically arranged on two sides of the oil pipe hanger (13).
2. The compact shale gas production wellhead assembly according to claim 1, wherein the skew four-way valve block (1) is formed by combining a valve block valve body (101) and four identical flat valve assemblies (102).
3. The compact shale gas production wellhead assembly of claim 2, the lower part of the valve body of the skew four-way conjoined valve group (1) is provided with a neck large flange, and the upper part is a flat columnar body with right-angled bulges at two sides, the center is an upper channel hole and a lower channel hole, two sides of the valve body of the oblique four-way conjoined valve group (1) are branch channel holes which form an included angle of 45 degrees with the upper channel hole and the lower channel hole, and the channel orifices are respectively positioned on the upper and lower planes and the inclined planes at the upper left and right sides, a trapezoidal cushion ring groove and uniformly distributed threaded blind holes or stud through holes are processed around the four channel orifices, the front side of the flat columnar body of the skew four-way conjoined valve group (1) is provided with four blind hole valve cavities vertical to the channel holes relative to the four channel holes, and a trapezoidal annular gasket groove and uniformly distributed threaded blind holes are formed around the four blind hole valve cavity openings.
4. The compact shale gas production wellhead device according to claim 2, wherein the skew four-way valve bank (1) comprises four sets of flat valve assemblies (102), and the four sets of flat valve assemblies (102) are all parts of a manual hidden rod flat valve with an umbrella-shaped gear driver and a switch indicator.
5. A compact shale gas production wellhead assembly as claimed in claim 1 wherein the large bore main valve (8) is a manual ball screw rising stem flat valve and the bore of the valve is larger than the outside diameter of the tubing hanger (13).
6. A compact shale gas production wellhead assembly as claimed in claim 1 wherein the four manual wing valves (11) in the large tubing head assembly are manual hidden rod flat plate valves with bevel gear drives and on-off indicators.
7. The compact shale gas production wellhead assembly of claim 1, wherein the tubing hanger (13) is a mandrel-style tubing hanger component with a sealed end and no extension neck, and the tubing hanger (13) is formed by a hanger body (1301), three elastic seal rings (1302), a wedge-style metal seal ring (1303), a metal washer (1304), a round nut (1305), and a set screw (1306) in combination.
8. The compact shale gas production wellhead device as claimed in claim 7 wherein the hanger body (1301) is a hollow cylindrical part with a through hole in the center and tapered thread-like openings at both ends, the outer periphery of the hanger body (1301) cylindrical part is sequentially processed into a longer cylinder, a cone, a shorter cylinder, a screw cylinder and a cylinder with decreasing diameters from top to bottom, a 90 degree V-shaped groove is cut in the middle of the longer cylinder, two rectangular grooves are formed above the V-shaped groove, and a rectangular groove is formed below the V-shaped groove.
9. The compact shale gas production wellhead device according to claim 7, wherein three elastic sealing rings (1302) are FS type elastic sealing rings, the material of the elastic sealing rings (1302) is "FKM fluororubber" or "HNBR high saturated hydrogenated nitrile rubber", and two elastic steel wire rings are respectively arranged on two shoulders of the protruding end of each elastic sealing ring (1302).
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| CN202110996172.9A CN113513284A (en) | 2021-08-27 | 2021-08-27 | Compact shale gas production wellhead assembly |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110996172.9A CN113513284A (en) | 2021-08-27 | 2021-08-27 | Compact shale gas production wellhead assembly |
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| CN202110996172.9A Pending CN113513284A (en) | 2021-08-27 | 2021-08-27 | Compact shale gas production wellhead assembly |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117404041A (en) * | 2023-12-14 | 2024-01-16 | 中国石油集团渤海钻探工程有限公司 | Injection and production wellhead device |
| 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 |
| CN117404041A (en) * | 2023-12-14 | 2024-01-16 | 中国石油集团渤海钻探工程有限公司 | Injection and production wellhead device |
| CN117404041B (en) * | 2023-12-14 | 2024-02-23 | 中国石油集团渤海钻探工程有限公司 | Injection and production wellhead device |
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