CN114809971B - Quick sealing device for oil gas exploitation wellhead - Google Patents
Quick sealing device for oil gas exploitation wellhead Download PDFInfo
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- CN114809971B CN114809971B CN202210194456.0A CN202210194456A CN114809971B CN 114809971 B CN114809971 B CN 114809971B CN 202210194456 A CN202210194456 A CN 202210194456A CN 114809971 B CN114809971 B CN 114809971B
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- oil
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells for anchoring the tools or the like
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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)
- Pipe Accessories (AREA)
Abstract
The invention discloses a quick sealing device for an oil gas exploitation wellhead, which comprises: the fixed assembly is installed underground the oil well mouth, and the installation end of the fixed assembly extends to the ground; the seal installation assembly is installed in the fixed assembly, the seal installation assembly is inserted into the fixed assembly in a sliding mode, and the seal installation assembly is locked and fixed with the fixed assembly through a fixed threaded pin. According to the invention, the fixing component and the sealing installation component are designed in a split mode, so that the fixing component and the sealing installation component can be separated quickly when the sealing is carried out, and the maintenance and cleaning of an oil gas collecting pipeline are facilitated; through the setting of annular seal gasbag, can hug closely the surface of oil gas collection pipeline through annular seal gasbag and realize sealedly to this mode cooperation arc splint use, also have the effect of certain fixed oil gas collection pipeline.
Description
Technical Field
The invention relates to the technical field of oil and gas exploitation, in particular to a quick sealing device for an oil and gas exploitation wellhead.
Background
Hydrocarbon recovery is the process of recovering oil, gas, etc., buried in an underground reservoir from the ground. The way of oil and gas from underground to ground can be divided into: self-spraying and artificial lifting. The manual lifting oil extraction comprises the following steps: gas lift oil extraction, pumping unit with rod pump oil extraction, submersible electric centrifugal pump oil extraction, hydraulic piston pump oil extraction, jet pump oil extraction, etc.
The sealing of the wellhead is critical in the oil and gas exploitation process, mainly aims at sand prevention and water prevention of the wellhead, and most of the prior art is to conduct thread or welding technology on an oil and gas acquisition pipeline, but the method is quite inconvenient when the oil and gas acquisition pipeline needs to be maintained and cleaned, so that a quick sealing device for the oil and gas exploitation wellhead is provided.
Disclosure of Invention
The invention aims to provide a quick sealing device for an oil gas exploitation wellhead, which is designed in a split mode through a fixing component and a sealing installation component, and can quickly separate the fixing component from the sealing installation component while sealing, so that maintenance and cleaning of an oil gas acquisition pipeline are facilitated, and the problems in the background art are solved.
In order to achieve the above purpose, the present invention provides the following technical solutions:
an oil and gas production wellhead quick seal device comprising:
the fixed assembly is installed underground the oil well mouth, and the installation end of the fixed assembly extends to the ground;
the seal installation assembly is arranged in the fixed assembly and is in sliding insertion connection with the inside of the fixed assembly, and the seal installation assembly is locked and fixed with the fixed assembly through a fixed threaded pin;
the oil gas collecting pipeline is arranged in the sealing installation assembly, one end of the oil gas collecting pipeline extends to the upper part of the sealing installation assembly, a plurality of groups of collecting ports are formed in one end of the oil gas collecting pipeline, valves are correspondingly arranged on the collecting ports in a one-to-one correspondence manner, and the other end of the oil gas collecting pipeline extends to the lower end of the fixing assembly;
the fixing assembly includes:
the cross section of the hollow fixed shell is in a convex shape, and the annular limiting block is arranged on the outer wall of the hollow fixed shell;
the hollow stationary housing includes:
the upper connecting part and the lower fixing part are integrally formed, the annular limiting block is arranged on the outer wall of the lower fixing part, and the sealing installation assembly is installed in the upper connecting part;
the side wall of the upper connecting part is provided with a threaded through hole, the fixed threaded pin is arranged in the threaded through hole in a threaded manner, and one end of the fixed threaded pin extends to the inside of the upper connecting part;
the seal mounting assembly includes:
the mounting block and the plug-in block of setting on the mounting block lateral wall, the slot has been seted up on the inner wall of upper junction, the plug-in block slip grafting is in the inside of slot, the screw thread through-hole set up in inside the slot, equidistant locating hole has been seted up on the lateral wall of plug-in block, the one end of fixed thread round pin peg graft in inside the locating hole.
Preferably, a sealing ring is arranged at the inner bottom of the upper connecting part, a sealing groove corresponding to the sealing ring is arranged at the lower end of the mounting block, and the sealing ring is clamped in the sealing groove in a sealing way.
Preferably, the inside of installation piece is offered and is used for the via hole that oil gas collection pipeline passed, the inside of via hole is provided with annular seal gasbag, the last embedded gas tube that has of installation piece, the gas outlet end of gas tube with the inside intercommunication of annular seal gasbag, annular seal gasbag conflict in on the outer wall of oil gas collection pipeline.
Preferably, the inside wall of via hole has been seted up the spliced eye, the inside slip grafting of spliced eye has the slide bar, the one end of slide bar is fixed with the arc splint, be provided with arc anti-skidding rubber gasket on the inner wall of arc splint.
Preferably, two groups of blind holes are symmetrically formed in the upper end of the mounting block, two groups of blind holes are internally inserted with limiting rods, the insertion holes are communicated with the inside of the blind holes, and the other ends of the sliding rods are abutted to the limiting rods.
Preferably, an extension spring is sleeved on the sliding rod, and two ends of the extension spring are respectively connected with the inner wall of the through hole and the side wall of the arc clamping plate.
Preferably, the upper end of the limiting rod is respectively provided with two groups of annular jacking blocks, the two groups of annular jacking blocks are correspondingly arranged at the positions of the inserting holes, the other end of the sliding rod is provided with an arc end, and the arc end of the sliding rod is abutted to the annular jacking blocks.
Preferably, an annular elastic sealing block is arranged in the lower fixing part, an arc-shaped guide edge is arranged at an opening at the upper end of the annular elastic sealing block, and the aperture of the annular elastic sealing block is smaller than the outer diameter of the oil gas collecting pipeline by 3-5 mm.
Preferably, the upper end of the limiting rod is provided with a limiting plate, a neodymium-iron-boron magnet block is embedded in the end of the limiting plate, and the neodymium-iron-boron magnet block is fixedly adsorbed on the upper surface of the mounting block.
In summary, the beneficial effects of the invention are as follows due to the adoption of the technology:
according to the invention, through the split design of the fixing component and the sealing installation component, the fixing component and the sealing installation component can be rapidly separated while sealing, so that the maintenance and cleaning of an oil gas collecting pipeline are facilitated;
on the basis of the beneficial effects, the annular sealing air bag is arranged, so that the annular sealing air bag can be tightly attached to the surface of the oil gas collecting pipeline to realize sealing, and the mode is matched with the arc-shaped clamping plate for use, so that the oil gas collecting pipeline can be fixed to a certain extent;
on the basis of the beneficial effects, the oil gas collecting pipeline is clamped and fixed by the limiting rod, the limiting rod is matched with the sliding rod and the extension spring, and the arc-shaped clamping plate and the arc-shaped anti-slip rubber gaskets arranged on the inner wall of the arc-shaped clamping plate can be ensured to further realize the fixation of the oil gas collecting pipeline;
on the basis of the beneficial effects, the annular limiting block is arranged on the outer wall of the hollow fixed shell, so that the fixed part is firmly fixed after being arranged on the ground of the wellhead of the oil well, and the fixed part cannot be displaced due to the disassembly and assembly of the fixed component and the sealing installation component.
Drawings
FIG. 1 is a schematic diagram of a rapid sealing device for an oil and gas exploitation wellhead according to the present invention;
FIG. 2 is a schematic structural view of a fixing assembly according to the present invention;
FIG. 3 is a schematic view of the seal mounting assembly of the present invention;
FIG. 4 is an enlarged view of the structure of FIG. 3 at A in accordance with the present invention;
FIG. 5 is a schematic view of a plug block according to the present invention;
fig. 6 is a schematic structural view of the arc clamping plate of the present invention.
In the figure: 1. a fixing assembly; 2. a seal mounting assembly; 3. fixing the threaded pin; 4. an oil gas collection pipeline; 5. a collection port; 6. a valve; 7. a hollow fixed housing; 8. an annular limiting block; 9. an upper connection part; 10. a lower fixing part; 11. a threaded through hole; 12. a mounting block; 13. a plug block; 14. a slot; 15. positioning holes; 16. a seal ring; 17. sealing grooves; 18. a via hole; 19. an annular seal airbag; 20. an inflation tube; 21. a plug hole; 22. a slide bar; 23. an arc clamping plate; 24. arc-shaped anti-slip rubber gaskets; 25. a blind hole; 26. a limit rod; 27. a tension spring; 28. an annular ejector block; 29. an annular elastic sealing block; 30. an arc-shaped guide edge; 31. a limiting plate; 32. neodymium iron boron magnet block.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
The present invention provides a rapid sealing device for an oil and gas exploitation wellhead as shown in fig. 1-6, comprising:
the fixed assembly 1 is arranged underground the oil well mouth, and the installation end of the fixed assembly 1 extends to the ground;
the sealing installation component 2 is installed in the fixed component 1, the sealing installation component 2 is inserted into the fixed component 1 in a sliding manner, and the sealing installation component 2 is locked and fixed with the fixed component 1 through the fixed threaded pin 3;
the oil gas collection pipeline 4 is arranged in the seal installation assembly 2, one end of the oil gas collection pipeline 4 extends to the upper part of the seal installation assembly 2, one end of the oil gas collection pipeline 4 is provided with no lower than four groups of collection ports 5, valves 6 are correspondingly arranged on the no lower than four groups of collection ports 5 one by one, and the other end of the oil gas collection pipeline 4 extends to the lower end of the fixed assembly 1;
further, as shown in fig. 2, the fixing assembly 1 includes:
the cross section of the hollow fixed shell 7 is in a convex shape, and the annular limiting block 8 is arranged on the outer wall of the hollow fixed shell 7;
specifically, as shown in fig. 2, the hollow stationary housing 7 includes:
the upper connecting part 9 and the lower fixing part 10 are integrally formed, the annular limiting block 8 is arranged on the outer wall of the lower fixing part 10, the sealing installation assembly 2 is installed in the upper connecting part 9, and the annular limiting block 8 is arranged on the outer wall of the hollow fixing shell 7, so that after the lower fixing part 10 is installed on the ground of an oil well wellhead, the fixing is firm, and the sealing installation assembly 2 cannot be displaced due to the dismounting and the mounting of the fixing assembly 1;
a threaded through hole 11 is formed in the side wall of the upper connecting part 9, the fixed threaded pin 3 is installed in the threaded through hole 11 in a threaded mode, and one end of the fixed threaded pin 3 extends to the inside of the upper connecting part 9;
the inner bottom of the upper connecting part 9 is provided with a sealing ring 16, the lower end of the mounting block 12 is provided with a sealing groove 17 corresponding to the sealing ring 16, and the sealing ring 16 is clamped in the sealing groove 17 in a sealing way.
Specifically, be provided with annular elastic seal piece 29 on the inside of lower fixed part 10, annular elastic seal piece 29 upper end opening part is provided with arc leading edge 30, and annular elastic seal piece 29's aperture is less than oil gas collection pipeline 4 external diameter 3mm-5mm.
Specifically, as shown in fig. 2 and 5, the seal mounting assembly 2 includes:
the mounting block 12 and the plug-in block 13 arranged on the outer side wall of the mounting block 12, the inner wall of the upper connecting part 9 is provided with a slot 14, the plug-in block 13 is in sliding plug-in connection with the inside of the slot 14, the threaded through hole 11 is arranged in the slot 14, the side wall of the plug-in block 13 is provided with positioning holes 15 at equal intervals, and one end of the fixed threaded pin 3 is in plug-in connection with the inside of the positioning holes 15;
specifically, as shown in fig. 2, the inside of the installation block 12 is provided with a via hole 18 for the oil gas collecting pipeline 4 to pass through, the inside of the via hole 18 is provided with an annular sealing air bag 19, the upper part of the installation block 12 is embedded with an inflation tube 20, the air outlet end of the inflation tube 20 is communicated with the inside of the annular sealing air bag 19, the annular sealing air bag 19 is abutted against the outer wall of the oil gas collecting pipeline 4, the surface of the oil gas collecting pipeline 4 can be tightly attached to the annular sealing air bag 19 to realize sealing through the arrangement of the annular sealing air bag 19, and the mode is matched with an arc clamping plate 23 for use, so that the oil gas collecting pipeline 4 is fixed to a certain extent.
Further, as shown in fig. 3 and 6, an insertion hole 21 is formed in the inner side wall of the via hole 18, a sliding rod 22 is inserted in the insertion hole 21 in a sliding manner, one end of the sliding rod 22 is fixed with an arc clamping plate 23, an arc anti-slip rubber gasket 24 is arranged on the inner wall of the arc clamping plate 23, an extension spring 27 is sleeved on the sliding rod 22, and two ends of the extension spring 27 are respectively connected with the inner wall of the via hole 18 and the side wall of the arc clamping plate 23;
further, as shown in fig. 3, two groups of blind holes 25 are symmetrically formed in the upper end of the mounting block 12, the two groups of blind holes 25 are internally inserted with a limiting rod 26, the upper end of the limiting rod 26 is provided with a limiting plate 31, a neodymium iron boron magnet block 32 is embedded in the end of the limiting plate 31, the neodymium iron boron magnet block 32 is adsorbed and fixed on the upper surface of the mounting block 12, the inserting holes 21 are communicated with the blind holes 25, the other end of the sliding rod 22 is abutted against the limiting rod 26, two groups of annular jacking blocks 28 are respectively arranged at the upper end of the limiting rod 26, the positions of the two groups of annular jacking blocks 28 and the inserting holes 21 are correspondingly arranged, the other end of the sliding rod 22 is provided with an arc end, the arc end of the sliding rod 22 is abutted against the annular jacking block 28, and the arc clamping plate 23 and the arc anti-skid rubber gaskets 24 arranged on the inner wall of the arc clamping plate 23 can be ensured to clamp and fix the oil gas collecting pipeline 4 for further realizing the fixing of the oil gas collecting pipeline 4 through the limiting rod 26.
Principle of: through the split type design of fixed subassembly 1 and seal installation component 2, when sealed, can be fast with fixed subassembly 1 and seal installation component 2 separately, be convenient for maintain the clearance to oil gas collection pipeline.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Claims (9)
1. An oil and gas exploitation wellhead quick sealing device, comprising:
the oil well head comprises a fixed assembly (1), wherein the fixed assembly (1) is installed underground an oil well mouth, and the installation end of the fixed assembly (1) extends to the ground;
the sealing installation component (2) is installed in the fixing component (1), the sealing installation component (2) is inserted into the fixing component (1) in a sliding manner, and the sealing installation component (2) is locked and fixed with the fixing component (1) through a fixed threaded pin (3);
the oil gas collection pipeline (4) is arranged in the seal installation assembly (2), one end of the oil gas collection pipeline (4) extends to the upper part of the seal installation assembly (2), one end of the oil gas collection pipeline (4) is provided with a plurality of groups of collection ports (5), the collection ports (5) are provided with valves (6) in one-to-one correspondence, and the other end of the oil gas collection pipeline (4) extends to the lower end of the fixed assembly (1);
the fixing assembly (1) comprises:
the cross section of the hollow fixed shell (7) is in a convex shape, and the annular limiting block (8) is arranged on the outer wall of the hollow fixed shell (7);
the hollow stationary housing (7) comprises:
the upper connecting part (9) and the lower fixing part (10), the annular limiting block (8) is integrally formed on the outer wall of the lower fixing part (10), and the seal installation assembly (2) is installed in the upper connecting part (9);
a threaded through hole (11) is formed in the side wall of the upper connecting portion (9), the fixed threaded pin (3) is installed in the threaded through hole (11) in a threaded mode, and one end of the fixed threaded pin (3) extends to the inside of the upper connecting portion (9);
the seal mounting assembly (2) comprises:
the mounting block (12) and the grafting piece (13) of setting on the lateral wall of mounting block (12), slot (14) have been seted up on the inner wall of upper junction (9), grafting piece (13) slip grafting is in the inside of slot (14), screw thread through-hole (11) set up in inside slot (14), equidistant locating hole (15) have been seted up on the lateral wall of grafting piece (13), the one end of fixed thread round pin (3) peg graft in inside locating hole (15).
2. The rapid sealing device for an oil and gas production wellhead according to claim 1, wherein: the inner bottom of the upper connecting part (9) is provided with a sealing ring (16), the lower end of the mounting block (12) is provided with a sealing groove (17) which corresponds to the sealing ring (16), and the sealing ring (16) is clamped in the sealing groove (17) in a sealing way.
3. The rapid sealing device for an oil and gas production wellhead according to claim 1, wherein: the inside of installation piece (12) is offered and is used for oil gas collection pipeline (4) is passed through via hole (18), the inside of via hole (18) is provided with annular seal gasbag (19), the last embedded gas tube (20) of installation piece (12), the end of giving vent to anger of gas tube (20) with annular seal gasbag (19) inside intercommunication, annular seal gasbag (19) conflict in on the outer wall of oil gas collection pipeline (4).
4. A rapid sealing apparatus for an oil and gas production wellhead according to claim 3, wherein: the novel anti-slip device is characterized in that a plug hole (21) is formed in the inner side wall of the through hole (18), a sliding rod (22) is inserted into the plug hole (21) in a sliding mode, an arc-shaped clamping plate (23) is fixed at one end of the sliding rod (22), and an arc-shaped anti-slip rubber gasket (24) is arranged on the inner wall of the arc-shaped clamping plate (23).
5. The rapid sealing device for an oil and gas production wellhead of claim 4, wherein: two groups of blind holes (25) are symmetrically formed in the upper end of the mounting block (12), limiting rods (26) are inserted into the blind holes (25), the insertion holes (21) are communicated with the blind holes (25), and the other ends of the sliding rods (22) are abutted to the limiting rods (26).
6. The rapid sealing device for an oil and gas production wellhead of claim 5, wherein: the sliding rod (22) is sleeved with an extension spring (27), and two ends of the extension spring (27) are respectively connected with the inner wall of the through hole (18) and the side wall of the arc clamping plate (23).
7. The rapid sealing device for an oil and gas production wellhead of claim 5, wherein: the upper end of the limiting rod (26) is respectively provided with two groups of annular jacking blocks (28), the two groups of annular jacking blocks (28) are correspondingly arranged with the positions of the plug holes (21), the other end of the sliding rod (22) is provided with an arc end, and the arc end of the sliding rod (22) is abutted to the annular jacking blocks (28).
8. The rapid sealing device for an oil and gas production wellhead according to claim 1, wherein: an annular elastic sealing block (29) is arranged in the lower fixing portion (10), an arc-shaped guide edge (30) is arranged at an opening at the upper end of the annular elastic sealing block (29), and the aperture of the annular elastic sealing block (29) is smaller than the outer diameter of the oil gas collecting pipeline (4) by 3-5 mm.
9. The rapid sealing device for an oil and gas production wellhead of claim 5, wherein: the upper end of gag lever post (26) is provided with limiting plate (31), the end of limiting plate (31) is embedded to have neodymium iron boron magnetism body (32), neodymium iron boron magnetism body (32) adsorb and be fixed in the upper surface of installation piece (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210194456.0A CN114809971B (en) | 2022-03-01 | 2022-03-01 | Quick sealing device for oil gas exploitation wellhead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210194456.0A CN114809971B (en) | 2022-03-01 | 2022-03-01 | Quick sealing device for oil gas exploitation wellhead |
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| Publication Number | Publication Date |
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| CN114809971A CN114809971A (en) | 2022-07-29 |
| CN114809971B true CN114809971B (en) | 2023-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210194456.0A Active CN114809971B (en) | 2022-03-01 | 2022-03-01 | Quick sealing device for oil gas exploitation wellhead |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117189016B (en) * | 2023-09-08 | 2024-03-08 | 建湖县鸿达阀门管件有限公司 | Gas production wellhead device capable of automatically detecting and early warning |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208073396U (en) * | 2018-01-18 | 2018-11-09 | 江苏庆海石油机械有限公司 | A kind of well mouth sealing device being easily installed |
| CN111980617A (en) * | 2020-08-25 | 2020-11-24 | 中国石油大学(华东) | Well head protector for oil and gas field development |
| CN214035595U (en) * | 2021-01-14 | 2021-08-24 | 王强 | Well head sealing device for thermal oil extraction |
| CN215907800U (en) * | 2021-04-20 | 2022-02-25 | 西派集团有限公司 | Multilayer fast-assembling type wellhead assembly |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7559366B2 (en) * | 2006-12-07 | 2009-07-14 | Vetco Gray Inc. | Flex-lock metal seal system for wellhead members |
-
2022
- 2022-03-01 CN CN202210194456.0A patent/CN114809971B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208073396U (en) * | 2018-01-18 | 2018-11-09 | 江苏庆海石油机械有限公司 | A kind of well mouth sealing device being easily installed |
| CN111980617A (en) * | 2020-08-25 | 2020-11-24 | 中国石油大学(华东) | Well head protector for oil and gas field development |
| CN214035595U (en) * | 2021-01-14 | 2021-08-24 | 王强 | Well head sealing device for thermal oil extraction |
| CN215907800U (en) * | 2021-04-20 | 2022-02-25 | 西派集团有限公司 | Multilayer fast-assembling type wellhead assembly |
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| CN114809971A (en) | 2022-07-29 |
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Effective date of registration: 20230904 Address after: No.1 Incubator 9-601-03, Phase I Project of Science and Technology Incubator in Daqing High-tech Zone, Heilongjiang Province Applicant after: DAQING PUQING DRILLING EQUIPMENT MANUFACTURING CO.,LTD. Address before: 224400 28 industrial concentration zone, Gou Dun Town, Funing County, Yancheng City, Jiangsu Applicant before: JIANGSU HENGDA MACHINERY MANUFACTURING Co.,Ltd. |
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