CN103470914A - Joint coating method applicable to thickened erosion-resistant layers of directionally drilled and crossed pipelines - Google Patents
Joint coating method applicable to thickened erosion-resistant layers of directionally drilled and crossed pipelines Download PDFInfo
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- CN103470914A CN103470914A CN2013103757127A CN201310375712A CN103470914A CN 103470914 A CN103470914 A CN 103470914A CN 2013103757127 A CN2013103757127 A CN 2013103757127A CN 201310375712 A CN201310375712 A CN 201310375712A CN 103470914 A CN103470914 A CN 103470914A
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Abstract
The invention discloses a joint coating method applicable to thickened erosion-resistant layers of directionally drilled and crossed pipelines. The joint coating method includes reserving a pipe end with the length of 100-150mm on an erosion-resistant layer; selectively utilizing a narrow polyethylene thermal shrinkage band as a first joint coating construction layer; selectively utilizing a special directional drilling polyethylene thermal shrinkage band as a second joint coating construction layer; utilizing a special directional drilling polyethylene sacrificial band as a third joint coating construction layer in the advancing direction for dragging back a directionally drilled and crossed pipeline. The thickness of the narrow polyethylene thermal shrinkage band is 2.5mm, and the width of the narrow polyethylene thermal shrinkage band is equal to the reserved length of the pipe end after the narrow polyethylene thermal shrinkage band is shrunk. The thickness of the special directional drilling polyethylene thermal shrinkage band ranges from 2.8mm to 3.1mm before the special directional drilling polyethylene thermal shrinkage band is shrunk, and the width of the special directional drilling polyethylene thermal shrinkage band ranges from 520mm to 600mm after the special directional drilling polyethylene thermal shrinkage band is shrunk. The thickness of a single side of the special directional drilling polyethylene sacrificial band is increased and is 2.8mm, and the width of the special directional drilling polyethylene sacrificial band is 300mm after the special directional drilling polyethylene sacrificial band is shrunk. The joint coating method has the advantages that the completeness of the erosion-resistant layers of directionally drilled and crossed sections of the pipelines can be improved advantageously, and weak links of joint coated positions are protected; water vapor channels can be effectively prevented by multi-layer staggered joint structures, the service life can be prolonged, and the scratch resistance and the tensile strength can be improved.
Description
Technical field
The present invention relates to a kind of method of construction, especially relate to a kind of field joint construction new method of petroleum-gas pipeline engineering Directional Drilling crossing pipeline thickening anticorrosive coat.
Background technique
At present, in petroleum-gas pipeline engineering at home, the Directional Drilling crossing technology is used widely, not only is applied to the River Crossing section, also is applied to the special locations such as massif, highway, railway crossing.Due to geological condition, working measure is lack of standardization and pipeline anticorrosion coating protection is lacked to the reason such as effective measures, causes through section pipeline anticorrosion coating degree of impairment frequent all the more.Different from general cable tubing, after Directional Drilling for Pipeline Crossing completes pipeline will be long-term buried in soil, can not excavate, the pipeline anticorrosion coating breakage formed in construction almost can't be repaired, and the long-term safety operation of pipeline is stayed to the hidden danger of unrepairable.
In recent years, for strengthening Directional Drilling crossing pipeline anticorrosive coat integrity, the multiple technological scheme targetedly of domestic appearance.Directional Drilling crossing pipeline three-decker polyethylene anticorrosive coating being thickeied to (as the 3.7mm from conventional design is increased to 6mm) is exactly a kind of scheme wherein.For thickening later Directional Drilling crossing pipeline anticorrosive coat, the present invention is comprehensive field joint construction new method for it.
Summary of the invention
In order to overcome the above-mentioned shortcoming of prior art, the invention provides a kind of jointing method that is applicable to Directional Drilling crossing pipeline thickening anticorrosive coat, on the basis of the conventional polyethylene thermal contraction strap jointing method of gas pipeline, for the caducous present situation of joint coating on pipeline part anticorrosive coat in the Directional Drilling crossing process, characteristics in conjunction with pipeline thickening anticorrosive coat, a kind of jointing method that is applicable to Directional Drilling crossing pipeline thickening anticorrosive coat has been proposed, be conducive to improve the integrity of Directional Drilling through section pipeline anticorrosion coating, be applicable to Gas Pipeline Project Directional Drilling through section anticorrosive coat working design.
The technical solution adopted for the present invention to solve the technical problems is: a kind of jointing method that is applicable to Directional Drilling crossing pipeline thickening anticorrosive coat comprises the steps:
The first step, anticorrosive coat pipe end are reserved:
Directional Drilling crossing pipeline thickening anticorrosive coat pipe end length in reserve is 100～150mm, and the polyethylene layer end face after processing forms the chamfering that is less than or equal to 30 °; It is 200～300mm that two pipe ends corresponding to weld joint add up to length in reserve;
Second step, narrow type polyethylene thermal contraction strap are filled construction:
The definite pre-allowance of anticorrosive coat pipe end according to the first step, to select thickness be 2.5mm, shrink after width equal the first layer of the narrow type polyethylene thermal contraction strap of anticorrosive coat pipe end length in reserve in the first step as field joint construction;
The 3rd step, the special-purpose polyethylene thermal contraction strap construction of Directional Drilling:
The definite pre-allowance of anticorrosive coat pipe end according to the first step, to select thickness before shrinking be 2.8～3.1mm, shrink after the width special-purpose polyethylene thermal contraction strap of Directional Drilling that is 520～600mm as the second layer of field joint construction;
The 4th step, sacrifice belt construction:
After completing the 3rd step construction, return the direction of advance of dragging at the Directional Drilling crossing pipeline, one-sided increase thickness is 2.8mm, shrink after the width special-purpose polyethylene sacrifice of the Directional Drilling band that is 300mm as the 3rd layer of field joint construction.
Compared with prior art, good effect of the present invention is: according to the thickness of straight length pipe main body anticorrosive coat, design a kind of unconventional pipeline anticorrosion coating repaired mouth structure.Pipeline anticorrosion coating repaired mouth structure total thickness, a little less than straight length main body anticorrosive coat, is relied on the protection of straight length main body anticorrosive coat, and repaired mouth position anticorrosive coat is depressed under construction pull-back force damage surface, is conducive to protect repaired mouth position weak link.
And multilayer fissure of displacement structure can effectively stop the formation of vapor channel, improves integrally-built integrity and working life; The special-purpose polyethylene thermal contraction strap of outer high-intensity Directional Drilling, as the support of total, guarantees the intensity of repaired mouth position anticorrosive coat, improves damage resistant, the de-performance of tension.
The accompanying drawing explanation
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Fig. 1 is Directional Drilling through section repaired mouth structural representation.
Embodiment
As shown in Figure 1, a kind of jointing method that is applicable to Directional Drilling crossing pipeline thickening anticorrosive coat, the Directional Drilling crossing pipeline adopts thickening anticorrosive coat (being the three-decker polyethylene anticorrosive coating), and concrete steps are as follows:
The first step, anticorrosive coat pipe end are reserved:
Directional Drilling crossing pipeline thickening anticorrosive coat 1 pipe end length in reserve (steel pipe exposed part) is that 100～150mm(recommends 150mm), the polyethylene layer end face after processing should form the chamfering that is less than or equal to 30 °.It is that 200～300mm(recommends 300mm that two pipe ends of weld joint 5 correspondences add up to length in reserve).
Second step, narrow type polyethylene thermal contraction strap are filled construction:
The definite pre-allowance of anticorrosive coat pipe end according to the first step, to select thickness be 2.5mm, shrink after width equal the first layer of the narrow type polyethylene thermal contraction strap 2 of anticorrosive coat pipe end length in reserve in the first step as field joint construction.The Specific construction step of narrow type polyethylene thermal contraction strap is as follows:
(1) steel tube surface is processed:
The steel tube surface derusting grade should reach the Sa21/2 level of GB/T8923.1 regulation.
(2) pipeline preheating:
Preheating temperature is controlled in requirement by the product descritption of narrow type polyethylene thermal contraction strap.The upper and lower temperature limit of preheating temperature when each manufacturer all stipulates its product constructing operation.If preheating temperature is too low, the curing reaction that is unfavorable for priming paint reaches the bonding composite effect with hot melt adhesive fully; If preheating temperature is too high, can accelerate again the curing reaction of priming paint, caused before shrink belt is installed priming paint surface drying even do solid work or solidify, can not guarantee the active reaction of priming paint and hot melt adhesive, greatly reduce the cohesive force of shrink belt.
(3) priming paint brushing:
By the requirement allotment of the products instruction of narrow type polyethylene thermal contraction strap even brushwork epoxy resin priming paint, its thickness of wet film is more than or equal to 120 μ m.Epoxy resin primer can improve the adhesive property of shrink belt to steel pipe greatly, and complete, uniform priming paint possesses certain antiseptic property for steel pipe.Epoxy primer is as last one barrier of pipeline anticorrosion, and necessary effective thickness (>=120 μ m) and even compact can strengthen shrink belt repaired mouth reliability of structure.
(4) heat shrink:
Use fired heater slowly to heat, from the middle of narrow type polyethylene thermal contraction strap, heated along hoop, extremely narrow type polyethylene thermal contraction strap is fitted in pipe surface fully.Should note checking the fusing situation (check the mobility of glue by finger-press method, the finger impression should disappear automatically) of hot melt adhesive in bake process, guarantee the baking quality of whole repaired mouth.
This layer of Main Function is to fill with concave surface, is the smooth transition of the second layer that makes field joint construction, and narrow type polyethylene thermal contraction strap 2 does not overlap with pipeline thickening anticorrosive coat 1.
(5) tempering:
After narrow type polyethylene thermal contraction strap homogeneous heating has shunk, can carry out a tempering, be about to whole shrink belt and again heat (approximately 2～3 minutes) one time.Make the abundant melting of hot melt adhesive and overflow from two ends.Discharge bubble with pressure roller simultaneously, and fully melt by finger pressure confirmation hot melt adhesive.Tempering can significantly promote the bonding peeling strength between polyethylene thermal contraction strap and pipeline.
The 3rd step, the special-purpose polyethylene thermal contraction strap construction of Directional Drilling:
The definite pre-allowance of anticorrosive coat pipe end according to the first step, selecting thickness before shrinking is that 2.8～3.1mm(recommends 3.05mm), shrink after width be that 520～600mm(recommends 600mm) the special-purpose polyethylene thermal contraction strap 3 of Directional Drilling as the second layer of field joint construction.The Specific construction step of the special-purpose polyethylene thermal contraction strap of Directional Drilling is as follows:
(1) heating of end upsetting anticorrosive coat and hacking:
This layer is without brushwork epoxy resin priming paint, but need be heated and plucking the thickening anticorrosive coat PE surface of pipe end.Under the condition of not priming, contraction bands increases with the polyethylene layer preheating temperature the cohesive force of PE and increases, and suitably improves preheating temperature and is conducive to improve the shrink belt repaired mouth of the not priming peeling strength to the PE anticorrosive coat.The heating of recommendation flame, temperature is higher than 75 ℃.
Anticorrosive coat hacking purpose is to improve the wellability of hot melt adhesive at polyethylene surface, increases the reactivity of anticorrosive coat surface and hot melt adhesive, improves the cohesive force of repaired mouth layer and body anticorrosive coat.The hacking mode pulls on the anticorrosive coat surface for the manual wire brush that uses, and surface has certain roughness to get final product.
(2) heat shrink:
Use fired heater slowly to heat, start in the middle of the special-purpose polyethylene thermal contraction strap 3 of Directional Drilling, heated along hoop, be fitted in pipe surface fully to Directional Drilling special use polyethylene thermal contraction strap 3.Should note checking the fusing situation (check the mobility of glue by finger-press method, the finger impression should disappear automatically) of hot melt adhesive in bake process, guarantee the baking quality of whole repaired mouth.
For guaranteeing the integral waterproofing sealability of repaired mouth structure, the special-purpose polyethylene thermal contraction strap 3 of Directional Drilling and pipeline thickening anticorrosive coat 1 bilateral overlap joint, every side lap width is more than or equal to 100mm.
(3) tempering:
After special-purpose polyethylene thermal contraction strap 3 homogeneous heatings of Directional Drilling have shunk, can carry out a tempering, be about to whole shrink belt and again heat (approximately 2～3 minutes) one time.Make the abundant melting of hot melt adhesive and overflow from two ends.Discharge bubble with pressure roller simultaneously, and fully melt by finger pressure confirmation hot melt adhesive.Tempering can significantly promote the bonding peeling strength between polyethylene thermal contraction strap and pipeline.
The 4th step, sacrifice belt construction:
After completing the 3rd step construction, return the direction of advance of dragging at the Directional Drilling crossing pipeline, one-sided increase thickness is 2.8mm, shrink after the width special-purpose polyethylene sacrifice of Directional Drilling that is 300mm with 4 as the 3rd layer of field joint construction.The Specific construction step of the special-purpose polyethylene sacrifice of Directional Drilling band is as follows:
(1) end upsetting anticorrosive coat hacking:
This layer is without brushwork epoxy resin priming paint, but need be heated and plucking the thickening anticorrosive coat PE surface of pipe end, and technical requirements is with the end upsetting anticorrosive coat hacking method of the 3rd step.
(2) heat shrink:
The heat shrink technical requirements of the special-purpose polyethylene sacrifice of Directional Drilling band is with the heat shrink method of the 3rd step.
For resisting back, drag friction in process to peel off the destroying infection to main repaired mouth layer (the special-purpose polyethylene thermal contraction strap 3 of Directional Drilling), the special-purpose polyethylene sacrifice of Directional Drilling be with 4 with special-purpose polyethylene thermal contraction strap 3 lap widths of Directional Drilling be 100mm, the special-purpose polyethylene sacrifice of Directional Drilling be with 4 with pipeline thickening anticorrosive coat 1 lap width be 200mm.
(3) tempering:
The tempering technology of the special-purpose polyethylene sacrifice of Directional Drilling band requires the tempering with the 3rd step.
Claims (9)
1. a jointing method that is applicable to Directional Drilling crossing pipeline thickening anticorrosive coat, is characterized in that: comprise the steps:
The first step, anticorrosive coat pipe end are reserved:
Directional Drilling crossing pipeline thickening anticorrosive coat pipe end length in reserve is 100～150mm, and the polyethylene layer end face after processing forms the chamfering that is less than or equal to 30 °; It is 200～300mm that two pipe ends corresponding to weld joint add up to length in reserve;
Second step, narrow type polyethylene thermal contraction strap are filled construction:
The definite pre-allowance of anticorrosive coat pipe end according to the first step, to select thickness be 2.5mm, shrink after width equal the first layer of the narrow type polyethylene thermal contraction strap of anticorrosive coat pipe end length in reserve in the first step as field joint construction;
The 3rd step, the special-purpose polyethylene thermal contraction strap construction of Directional Drilling:
The definite pre-allowance of anticorrosive coat pipe end according to the first step, to select thickness before shrinking be 2.8～3.1mm, shrink after the width special-purpose polyethylene thermal contraction strap of Directional Drilling that is 520～600mm as the second layer of field joint construction;
The 4th step, sacrifice belt construction:
After completing the 3rd step construction, return the direction of advance of dragging at the Directional Drilling crossing pipeline, one-sided increase thickness is 2.8mm, shrink after the width special-purpose polyethylene sacrifice of the Directional Drilling band that is 300mm as the 3rd layer of field joint construction.
2. a kind of jointing method that is applicable to Directional Drilling crossing pipeline thickening anticorrosive coat according to claim 1, it is characterized in that: the Specific construction step of the described narrow type polyethylene thermal contraction strap of second step is as follows:
(1) steel tube surface is processed:
The steel tube surface derusting grade reaches the Sa21/2 level of GB/T8923.1 regulation;
(2) pipeline preheating:
Preheating temperature is controlled in the upper and lower limit preheating temperature of narrow type polyethylene thermal contraction strap product descritption regulation;
(3) priming paint brushing:
By the requirement allotment of the products instruction of narrow type polyethylene thermal contraction strap even brushwork epoxy resin priming paint, thickness of wet film is more than or equal to 120 μ m;
(4) heat shrink:
Use fired heater slowly to heat, from the middle of narrow type polyethylene thermal contraction strap, heated along hoop, until narrow type polyethylene thermal contraction strap is fitted in pipe surface fully.
3. a kind of jointing method that is applicable to Directional Drilling crossing pipeline thickening anticorrosive coat according to claim 2, it is characterized in that: after narrow type polyethylene thermal contraction strap heat shrink completes, carry out again a tempering, tempering heating time is 2～3 minutes, makes the abundant melting of hot melt adhesive and overflows from two ends; Discharge bubble with pressure roller simultaneously, and fully melt by finger pressure confirmation hot melt adhesive.
4. a kind of jointing method that is applicable to Directional Drilling crossing pipeline thickening anticorrosive coat according to claim 1, it is characterized in that: the Specific construction step of the special-purpose polyethylene thermal contraction strap of the described Directional Drilling of the 3rd step is as follows:
(1) heating of end upsetting anticorrosive coat and hacking:
Use flame to be heated the thickening anticorrosive coat PE surface of pipe end, heating-up temperature is higher than 75 ℃; Adopt the manual mode of using wire brush to pull on the anticorrosive coat surface to carry out the hired roughneck, make the anticorrosive coat surface there is roughness;
(2) heat shrink:
Use fired heater slowly to heat, from the middle of the special-purpose polyethylene thermal contraction strap of Directional Drilling, heated along hoop, until the special-purpose polyethylene thermal contraction strap of Directional Drilling is fitted in pipe surface fully.
5. a kind of jointing method that is applicable to Directional Drilling crossing pipeline thickening anticorrosive coat according to claim 4, it is characterized in that: the special-purpose polyethylene thermal contraction strap of described Directional Drilling overlaps with pipeline thickening anticorrosive coat bilateral, and every side lap width is more than or equal to 100mm.
6. a kind of jointing method that is applicable to Directional Drilling crossing pipeline thickening anticorrosive coat according to claim 4, it is characterized in that: after the special-purpose polyethylene thermal contraction strap heat shrink of Directional Drilling is complete, carry out again a tempering, tempering heating time is 2～3 minutes, makes the abundant melting of hot melt adhesive and overflows from two ends; Discharge bubble with pressure roller simultaneously, and fully melt by finger pressure confirmation hot melt adhesive.
7. a kind of jointing method that is applicable to Directional Drilling crossing pipeline thickening anticorrosive coat according to claim 1, it is characterized in that: the Specific construction step of the special-purpose polyethylene sacrifice of the described Directional Drilling of the 4th step band is as follows:
(1) heating of end upsetting anticorrosive coat and hacking:
Use flame to be heated the thickening anticorrosive coat PE surface of pipe end, heating-up temperature is higher than 75 ℃; Adopt the manual mode of using wire brush to pull on the anticorrosive coat surface to carry out the hired roughneck, make the anticorrosive coat surface there is roughness;
(2) heat shrink:
Use fired heater slowly to heat, from the middle of the special-purpose polyethylene sacrifice of Directional Drilling band, heated along hoop, until the special-purpose polyethylene sacrifice of Directional Drilling band is fitted in pipe surface fully.
8. a kind of jointing method that is applicable to Directional Drilling crossing pipeline thickening anticorrosive coat according to claim 7, it is characterized in that: the special-purpose polyethylene sacrifice band of described Directional Drilling and the special-purpose polyethylene thermal contraction strap lap width of Directional Drilling are 100mm, and the special-purpose polyethylene sacrifice band of Directional Drilling and pipeline thickening anticorrosive coat lap width are 200mm.
9. a kind of jointing method that is applicable to Directional Drilling crossing pipeline thickening anticorrosive coat according to claim 7, it is characterized in that: after the special-purpose polyethylene sacrifice of Directional Drilling band heat shrink is complete, carry out again a tempering, tempering heating time is 2～3 minutes, makes the abundant melting of hot melt adhesive and overflows from two ends; Discharge bubble with pressure roller simultaneously, and fully melt by finger pressure confirmation hot melt adhesive.
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| CN201310375712.7A CN103470914B (en) | 2013-08-26 | 2013-08-26 | Joint coating method applicable to thickened erosion-resistant layers of directionally drilled and crossed pipelines |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631222A (en) * | 2018-03-19 | 2018-10-09 | 柳州钢铁股份有限公司 | Zinc-Oxide Arrester lead cracking restorative procedure |
| CN109058658A (en) * | 2018-09-27 | 2018-12-21 | 江苏清源管道技术有限公司 | A kind of three layers of PE anticorrosion structure of joint coating on pipeline and construction technology |
| CN115163961A (en) * | 2022-07-12 | 2022-10-11 | 淮河能源燃气集团有限责任公司 | Rapid plugging method for reserved joint of long-distance pipeline |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000185352A (en) * | 1998-12-22 | 2000-07-04 | Nitto Denko Corp | Method for anticorrosively repairing outer surface anticorrosive metal pipeline |
| JP2002022092A (en) * | 2000-07-06 | 2002-01-23 | Tokyo Gas Co Ltd | Repair construction method for anticorrosion pipe line |
| CN101936442A (en) * | 2009-07-01 | 2011-01-05 | 北京安科管道工程科技有限公司 | Method for mending steel pipeline polyolefin anticorrosive layer and product obtained by same |
| CN102305334A (en) * | 2011-05-20 | 2012-01-04 | 中国石油集团工程设计有限责任公司 | Method for protecting anti-corrosion layer of pipeline during horizontal directional drilling crossing in oil and gas engineering |
| CN102679086A (en) * | 2011-03-18 | 2012-09-19 | 中国石油天然气集团公司 | Intermediate-frequency heating repaired opening construction technology for thermal contraction band of buried steel pipeline |
-
2013
- 2013-08-26 CN CN201310375712.7A patent/CN103470914B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000185352A (en) * | 1998-12-22 | 2000-07-04 | Nitto Denko Corp | Method for anticorrosively repairing outer surface anticorrosive metal pipeline |
| JP2002022092A (en) * | 2000-07-06 | 2002-01-23 | Tokyo Gas Co Ltd | Repair construction method for anticorrosion pipe line |
| CN101936442A (en) * | 2009-07-01 | 2011-01-05 | 北京安科管道工程科技有限公司 | Method for mending steel pipeline polyolefin anticorrosive layer and product obtained by same |
| CN102679086A (en) * | 2011-03-18 | 2012-09-19 | 中国石油天然气集团公司 | Intermediate-frequency heating repaired opening construction technology for thermal contraction band of buried steel pipeline |
| CN102305334A (en) * | 2011-05-20 | 2012-01-04 | 中国石油集团工程设计有限责任公司 | Method for protecting anti-corrosion layer of pipeline during horizontal directional drilling crossing in oil and gas engineering |
Non-Patent Citations (1)
| Title |
|---|
| 蒋爱国等: "管道防腐层现场补口及补伤工艺探索", 《上海煤气》, no. 2, 31 December 2004 (2004-12-31), pages 14 - 16 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631222A (en) * | 2018-03-19 | 2018-10-09 | 柳州钢铁股份有限公司 | Zinc-Oxide Arrester lead cracking restorative procedure |
| CN109058658A (en) * | 2018-09-27 | 2018-12-21 | 江苏清源管道技术有限公司 | A kind of three layers of PE anticorrosion structure of joint coating on pipeline and construction technology |
| CN115163961A (en) * | 2022-07-12 | 2022-10-11 | 淮河能源燃气集团有限责任公司 | Rapid plugging method for reserved joint of long-distance pipeline |
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| CN103470914B (en) | 2015-04-08 |
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Effective date of registration: 20180111 Address after: 610041 Chengdu high tech Zone, Sichuan province sublimation Road No. 6 Patentee after: China Petroleum Engineering Construction Co Ltd Address before: 610041 Chengdu high tech Zone, Sichuan province sublimation Road No. 6 Patentee before: Engineering Design Co., Ltd., China Petroleum Group |
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Effective date of registration: 20210209 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CHINA PETROLEUM ENGINEERING & CONSTRUCTION Corp. Address before: No. 6, Sichuan hi tech Zone, sublime Road, Chengdu, Sichuan Patentee before: CHINA PETROLEUM ENGINEERING & CONSTRUCTION Corp. |