CN100363676C - Working cabin for drying maintain of underwater pipeline - Google Patents
Working cabin for drying maintain of underwater pipeline Download PDFInfo
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- CN100363676C CN100363676C CNB2005101324827A CN200510132482A CN100363676C CN 100363676 C CN100363676 C CN 100363676C CN B2005101324827 A CNB2005101324827 A CN B2005101324827A CN 200510132482 A CN200510132482 A CN 200510132482A CN 100363676 C CN100363676 C CN 100363676C
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- cabin
- oil cylinder
- driving oil
- displacement driving
- cabin body
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- 238000001035 drying Methods 0.000 title claims description 21
- 238000006073 displacement reaction Methods 0.000 claims description 45
- 238000012423 maintenance Methods 0.000 abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 238000000034 method Methods 0.000 description 7
- 230000006378 damage Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 210000003954 umbilical cord Anatomy 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010297 mechanical methods and process Methods 0.000 description 2
- 230000005226 mechanical processes and functions Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
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- Drying Of Solid Materials (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The present invention discloses an underwater pipeline dry maintenance operation cabin, which comprises an outer framework, an inner framework, a cabin body and a pair of seal doors, wherein the outer framework forms a cuboid shape, two manipulators are respectively arranged on the left and the right ends of the outer framework, and two guiding frames are respectively arranged on the lower parts of the left and the right ends; the inner framework is connected in the outer framework; the cabin body is connected in the inner framework, two openings in an inverse U shape are respectively arranged in the centers of the lower parts of the left and the right lateral faces of the cabin body, and the bottom of the cabin body has no bottom; a supply pipe connection opening is arranged in the top of the cabin body, and a sluice chamber is arranged on the front face of the cabin body; the bottom and the left and the right sides of the cabin body can be sealed by the seal doors which are symmetrically arranged in the cabin body, and semicircle grooves for containing pipelines to be repaired are correspondingly arranged on the left and the right sides of the seal doors. The underwater pipeline dry maintenance operation cabin provided by the present invention can create a completely dry condition under water, so divers can implement pipe maintenance operation in an underwater dry environment, and operation efficiency and maintenance quality are increased.
Description
Technical field
The present invention relates to the ocean engineering field, is a kind of working cabin for drying maintain of underwater pipeline.
Background technique
In offshore oil and construction of natural gas fields engineering, for landwards or oil storage system carry oil gas, at submarine laying a large amount of submarine pipelines, under external force or environmental factor effect, these pipelines distortion, fracture and leakage etc. in use can occur and damage phenomenon, can cause enormous economic loss and environmental disruption as untimely maintenance.Therefore, keeping in repair submarine pipeline in time, effectively and reliably is an important engineering.
Different with terrestrial pipeline, submarine pipeline is in the water environment, and this gives under water that pipeline maintenance brings special difficulty.The submarine pipeline maintenance process is divided into mechanical process and welding process substantially at present, and mechanical process comprises with special anchor ear, clip or sleeve pipe etc. handles the destruction pipeline section, and welding process welds new short tube after being included in the pipeline section that slices off destruction again.If these maintenance process wet type environment in water is implemented, mainly there are following two aspect deficiencies: the one, muscle power and ability are very limited during diver's underwater operation, and operating efficiency is low; The 2nd, the weld strength of WET WELDING is low under water, and is of poor quality.Therefore,, make these maintenance operatioies under the dry type environment, to carry out, will overcome above-mentioned deficiency effectively if a dry type environment is created at the pipeline maintenance scene under water.
At present, though there is the flourishing country of minority offshore oil industry to have the drying maintain ability in the world, but, there is obvious defects in existing dry chamber system, this system is made up of the gate-type portable pipe support of machinery and the cabin body that can only form the dry type environment of two apportions, perhaps is exactly a simple cabin body.Its cabin body does not have the attitude adjustment capability, needs ROV to observe the relative position of itself and pipeline aside, relies on the equipment of hanging to carry out limited positioning control again, and can only use under the clear water environment.The cabin body also can only move up and down simply, and these actual conditions for Protean submarine pipeline state obviously lack counter-measure.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can under mixed regimen condition, also can carry out accurately in placely, and form the working cabin for drying maintain of underwater pipeline that a dry type environment carries out constructing operation pipeline.
For achieving the above object, the present invention takes technological scheme:
A kind of working cabin for drying maintain of underwater pipeline, it includes: an external frame, be rectangular-shaped, its two ends, left and right sides respectively are provided with a mechanism hand, and the bottom at two ends, the left and right sides also respectively is provided with a leading truck; One inner gimbal, it is connected in the described external frame; One cabin body, it is connected in the described inner gimbal, and the lower central of this body left and right side, cabin respectively is provided with one and falls " U " type opening, and body bottom in cabin is the no end; The top of described cabin body is provided with a supplying pipe connection mouth, and body front, cabin is provided with a lock chamber; A pair of can the sealed compartment body sealed door of bottom and the left and right sides, it is symmetricly set in the body of described cabin, and the left and right sides correspondence of sealed door is provided with the ccontaining semi-circular recesses of waiting to repair pipeline.
In practical operation, the left strut of described inner gimbal and the two ends of right strut respectively are provided with a slide blocks, and the corresponding slide blocks of described external frame is provided with slide rail, and described slide blocks is arranged in the described slide rail; The inboard of external frame also is provided with at least one left and right displacement driving oil cylinder, and an end of this left and right displacement driving oil cylinder is connected the inboard of external frame, and the other end is connected on described left strut or the right strut.Respectively be provided with a slide rail on the left strut of described inner gimbal and the right strut, this slide rail is provided with a slide block, and this slide block is connected with the cabin body, in the joint, slide block is provided with a shift fork, and the cabin body is provided with a vertical slide-bar, and this slide-bar is arranged in the prong of shift fork; Also respectively be provided with a front and back displacement driving oil cylinder on the left strut of described inner gimbal and the right strut, the output terminal of this front and back displacement driving oil cylinder is connected on the described slide block; Be provided with at least one upper and lower displacement driving oil cylinder between the front support rod of described inner gimbal and the cabin body, the upper end of this upper and lower displacement driving oil cylinder is articulated on the front support rod, and the lower ending pivot of this upper and lower displacement driving oil cylinder is connected on body bottom, cabin; Be provided with at least one upper and lower displacement driving oil cylinder between the back support rod of described inner gimbal and the cabin body, the upper end of this upper and lower displacement driving oil cylinder is articulated on the back support rod, and the lower ending pivot of this upper and lower displacement driving oil cylinder is connected on body bottom, cabin.
Specifically, be provided with two upper and lower displacement driving oil cylinder between the front support rod of described inner gimbal and the cabin body, it is separately positioned on the left and right sides of cabin body; Be provided with a upper and lower displacement driving oil cylinder between the back support rod of described inner gimbal and the cabin body, it is arranged on body middle part, cabin.And the inboard of described external frame is provided with two left and right displacement driving oil cylinder, and an end of this left and right displacement driving oil cylinder is connected the inboard of external frame, and the other end is connected on the right strut.
In the above-mentioned working cabin for drying maintain of underwater pipeline, be provided with sealed door in an inner equilibrium valve and between described lock chamber and the body inside, cabin; Be provided with an outer equilibrium valve and an external sealed door between described lock chamber and the outside.In addition, the bottom of described external frame is provided with four slide resistant piles; The bottom of described external frame respectively is provided with a spike for four jiaos.
The present invention is owing to take above design, it has the following advantages: 1, the invention provides a kind of working cabin for drying maintain of underwater pipeline, it can create the condition of a complete dry type under water, make diver's dry type environment enforcement pipeline maintenance operation under water, improve operating efficiency and repair quality.2, among the present invention, cabin body, inner gimbal, external frame structure and interconnection technique have realized cabin body multifreedom motion, are convenient to the centering of cabin body and pipeline, fixing and sealing.3, the lock chamber setting on the middle deck body of the present invention makes the diver can under stress pass in and out the dried wet environment of inside and outside, cabin easily.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the schematic top plan view of Fig. 1
Fig. 3 looks schematic representation for the left side of Fig. 1
Fig. 4 looks schematic representation for the master of middle deck body of the present invention
Fig. 5 is the schematic top plan view of Fig. 4
Fig. 6 looks schematic representation for the left side of Fig. 4
Schematic representation when Fig. 7 uses for the present invention
Embodiment
As Fig. 1, Fig. 2, shown in Figure 3, a kind of working cabin for drying maintain of underwater pipeline, it includes:
One external frame 1 is rectangular-shaped, and its two ends, left and right sides respectively are provided with a mechanism hand 11, and the bottom at two ends, the left and right sides also respectively is provided with a leading truck 12;
One inner gimbal 2, it is connected in the external frame 1;
One cabin body 3, it is connected in the inner gimbal 2, and these cabin body 3 bottoms are the no end, and the lower central of left and right side respectively is provided with one and falls " U " type opening 31 (it is shown in Figure 6 to arrange in pairs or groups), the top of cabin body 3 is provided with a supplying pipe connection mouth 32, and body front, cabin is provided with a lock chamber 33;
A pair of can the sealed compartment body sealed door 4 of bottom and the left and right sides, it is symmetricly set in the cabin body 3, and the left and right sides correspondence of sealed door 4 is provided with the ccontaining semi-circular recesses 41 (it is shown in Figure 6 to arrange in pairs or groups) of waiting to repair pipeline.
In the present invention, the left strut 21 of inner gimbal 2 and the two ends of right strut 22 respectively are provided with a slide blocks 23, and external frame 1 corresponding slide blocks 23 is provided with slide rail 13, and slide blocks 23 is arranged in the slide rail 13; The inboard of external frame 1 also is provided with at least one left and right displacement driving oil cylinder 5, one end of this left and right displacement driving oil cylinder 5 is connected the inboard of external frame 1, the other end can be connected on left strut 21 or the right strut 22, specifically in the present embodiment, the inboard of external frame 1 is provided with two left and right displacement driving oil cylinder 5, one end of left and right displacement driving oil cylinder 5 is connected the inboard of external frame 1, and the other end is connected on the right strut 22 (as shown in Figure 2).
In addition, respectively be provided with a slide rail 24 on the left strut 21 of inner gimbal 2 of the present invention and the right strut 22, this slide rail 24 is provided with a slide block 25, this slide block 25 is connected with cabin body 3, in the joint, slide block 25 is provided with a shift fork 251, and cabin body 3 is provided with a vertical slide-bar 34, and this slide-bar 34 is arranged in the prong of shift fork 251; Also respectively be provided with a front and back displacement driving oil cylinder 6 on the left strut 21 of inner gimbal 2 and the right strut 22, the output terminal of this front and back displacement driving oil cylinder 6 is connected on the slide block 25; Be provided with at least one upper and lower displacement driving oil cylinder 7 between the front support rod 26 of inner gimbal 2 and the cabin body 3, the upper end of this upper and lower displacement driving oil cylinder 7 is articulated on the front support rod 26, and the lower ending pivot of this upper and lower displacement driving oil cylinder 7 is connected on cabin body 3 bottoms; Also be provided with at least one upper and lower displacement driving oil cylinder 7 between the back support rod 27 of inner gimbal 2 and the cabin body 3, the upper end of this upper and lower displacement driving oil cylinder 7 is articulated on the back support rod 27, and the lower ending pivot of this upper and lower displacement driving oil cylinder 7 is connected on cabin body 3 bottoms.Specifically in the present embodiment, be provided with two upper and lower displacement driving oil cylinder 7 between the front support rod 26 of inner gimbal 2 and the cabin body 3, it is separately positioned on the left and right sides of cabin body 3; Be provided with a upper and lower displacement driving oil cylinder 7 between the back support rod 27 of inner gimbal 2 and the cabin body 3, it is arranged on cabin body 3 middle parts.
In the present embodiment, be provided with sealed door 36 in an inner equilibrium valve 35 and between lock chamber 33 and cabin body 3 inside; Be provided with an outer equilibrium valve 37 and an external sealed door 38 (collocation Fig. 4, shown in Figure 5) between lock chamber 33 and the outside.
In the foregoing description, the bottom of external frame 1 also is provided with four slide resistant piles 14, is separately positioned on the Si Jiaochu (as shown in Figure 1) of external frame bottom.In addition, the bottom of external frame 1 also respectively is provided with a spike 15 for four jiaos, and the can regulate spike length at ordinary times not in the seabed lands fully to reach four pin.
Specific operation collocation Fig. 1 that the present invention waits in use～shown in Figure 7:
Before the submarine pipeline maintenance, to handle through foundation excavation in advance, the pipeline section that needs repairing is exposed to the seabed or apart from the seabed certain distance is arranged, water surface working mother boat is directly over the maintenance pipeline section, because the top of cabin body 3 is provided with supplying pipe connection mouth 32, can connect one by supplying pipe connection mouth 32 and supply with umbilical cord 8, the other end of supplying with umbilical cord 8 then is connected with water surface working mother boat.
By sonar or underwater television guiding the present invention is hung onto on the maintenance pipeline section, and pipeline is embedded in the leading truck 12 of external frame 1 two ends.By four spikes 15 of HYDRAULIC CONTROL SYSTEM external frame bottom or with mechanism hand 11 riser tubings 9, make pipeline Primary Location in leading truck 12, hold pipeline 9 by mechanism hand 11 then and make itself and external frame 1 relative fixed.Drive slide resistant pile 14 more then and insert the seabed, external frame 1 relative seabed is fixed, and control left and right displacement driving oil cylinder 5, front and back displacement driving oil cylinder 6 and upper and lower displacement driving oil cylinder 7 and adjust cabin body 3, make pipeline 9 be in " U " type opening 31 interior suitable positions of cabin body 3.Pipeline 9 is in cabin body 3 and falls in " U " type opening 31 behind the suitable positions, just can control and close sealed door 4, the semi-circular recesses 41 of sealed door 4 is placed in pipeline 9 wherein, and with its sealing, and sealed door 4 has also sealed " U " type opening 31 and cabin body 3 bottoms.
Water surface working mother boat makes the water in the body of cabin discharge out of my cabin by cabin body under shed by supplying with umbilical cord 8 transporting compressed gas body in the body of cabin, forms the dry type environment in the body of cabin.The diver dives and arrives the position of manned underwater dry-type cabin structure, open the outer equilibrium valve of lock chamber, make pressure and extraneous sea water pressure balance in the lock chamber, open the external sealed door of lock chamber, enter lock chamber, close the external sealed door of lock chamber and the outer equilibrium valve of lock chamber, open the inner equilibrium valve of lock chamber, make pressure and the interior pressure balance of cabin body in the lock chamber, open the interior sealed door of lock chamber, the diver enters the cabin body.After the diver enters the cabin body, implement the drying maintain of underwater pipeline operation.After the end of job, the diver can be by opposite program deliver from vault.
The present invention has substantive distinguishing features and remarkable progress, and it provides a kind of working cabin for drying maintain of underwater pipeline, makes diver's dry type environment enforcement pipeline maintenance operation under water, improves operating efficiency and repair quality.Its cabin body, inner gimbal, external frame structure and interconnection technique have realized cabin body multifreedom motion, are convenient to the centering of cabin body and pipeline, fixing and sealing.Lock chamber on the body of cabin makes the diver can under stress pass in and out the dried wet environment of inside and outside, cabin easily.
Claims (10)
1. working cabin for drying maintain of underwater pipeline is characterized in that it includes:
One external frame is rectangular-shaped, and its two ends, left and right sides respectively are provided with a mechanism hand, and the bottom at two ends, the left and right sides also respectively is provided with a leading truck;
One inner gimbal, it is connected in the described external frame;
One cabin body, it is connected in the described inner gimbal, and the lower central of this body left and right side, cabin respectively is provided with one and falls " U " type opening, and body bottom in cabin is the no end; The top of described cabin body is provided with a supplying pipe connection mouth, and body front, cabin is provided with a lock chamber;
A pair of can the sealed compartment body sealed door of bottom and the left and right sides, it is symmetricly set in the body of described cabin, and the left and right sides correspondence of sealed door is provided with the ccontaining semi-circular recesses of waiting to repair pipeline.
2. working cabin for drying maintain of underwater pipeline according to claim 1, it is characterized in that: the left strut of described inner gimbal and the two ends of right strut respectively are provided with a slide blocks, the corresponding slide blocks of described external frame is provided with slide rail, and described slide blocks is arranged in the described slide rail; The inboard of external frame also is provided with at least one left and right displacement driving oil cylinder, and an end of this left and right displacement driving oil cylinder is connected the inboard of external frame, and the other end is connected on described left strut or the right strut.
3. working cabin for drying maintain of underwater pipeline according to claim 2, it is characterized in that: respectively be provided with a slide rail on the left strut of described inner gimbal and the right strut, this slide rail is provided with a slide block, this slide block is connected with the cabin body, in the joint, slide block is provided with a shift fork, and the cabin body is provided with a vertical slide-bar, and this slide-bar is arranged in the prong of shift fork; Also respectively be provided with a front and back displacement driving oil cylinder on the left strut of described inner gimbal and the right strut, the output terminal of this front and back displacement driving oil cylinder is connected on the described slide block; Be provided with at least one upper and lower displacement driving oil cylinder between the front support rod of described inner gimbal and the cabin body, the upper end of this upper and lower displacement driving oil cylinder is articulated on the front support rod, and the lower ending pivot of this upper and lower displacement driving oil cylinder is connected on body bottom, cabin; Be provided with at least one upper and lower displacement driving oil cylinder between the back support rod of described inner gimbal and the cabin body, the upper end of this upper and lower displacement driving oil cylinder is articulated on the back support rod, and the lower ending pivot of this upper and lower displacement driving oil cylinder is connected on body bottom, cabin.
4. working cabin for drying maintain of underwater pipeline according to claim 3 is characterized in that: be provided with two upper and lower displacement driving oil cylinder between the front support rod of described inner gimbal and the cabin body, it is separately positioned on the left and right sides of cabin body; Be provided with a upper and lower displacement driving oil cylinder between the back support rod of described inner gimbal and the cabin body, it is arranged on body middle part, cabin.
5. working cabin for drying maintain of underwater pipeline according to claim 2, it is characterized in that: the inboard of described external frame is provided with two left and right displacement driving oil cylinder, one end of this left and right displacement driving oil cylinder is connected the inboard of external frame, and the other end is connected on the right strut.
6. according to claim 1 or 2 or 3 or 4 or 5 described working cabin for drying maintain of underwater pipeline, it is characterized in that: be provided with sealed door in an inner equilibrium valve and between described lock chamber and the body inside, cabin; Be provided with an outer equilibrium valve and an external sealed door between described lock chamber and the outside.
7. according to claim 1 or 2 or 3 or 4 or 5 described working cabin for drying maintain of underwater pipeline, it is characterized in that: the bottom of described external frame is provided with four slide resistant piles.
8. working cabin for drying maintain of underwater pipeline according to claim 6 is characterized in that: the bottom of described external frame is provided with four slide resistant piles.
9. according to claim 1 or 2 or 3 or 4 or 5 or 8 described working cabin for drying maintain of underwater pipeline, it is characterized in that: the bottom of described external frame respectively is provided with a spike for four jiaos.
10. working cabin for drying maintain of underwater pipeline according to claim 6 is characterized in that: the bottom of described external frame respectively is provided with a spike for four jiaos.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101324827A CN100363676C (en) | 2005-12-20 | 2005-12-20 | Working cabin for drying maintain of underwater pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101324827A CN100363676C (en) | 2005-12-20 | 2005-12-20 | Working cabin for drying maintain of underwater pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1786544A CN1786544A (en) | 2006-06-14 |
| CN100363676C true CN100363676C (en) | 2008-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101324827A Expired - Fee Related CN100363676C (en) | 2005-12-20 | 2005-12-20 | Working cabin for drying maintain of underwater pipeline |
Country Status (1)
| Country | Link |
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| CN (1) | CN100363676C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102126545B (en) * | 2011-01-31 | 2013-01-02 | 中国人民解放军91872部队上海研究室 | Underwater dry impermeable maintenance cabin for ship |
| US9199708B2 (en) | 2011-09-30 | 2015-12-01 | Xiaoming Shi | Atmospheric working cabin for underwater operation |
| NL2007756C2 (en) * | 2011-11-09 | 2013-05-14 | Ihc Holland Ie Bv | Workstation for transporting equipment to an underwater position. |
| CN105552821B (en) * | 2016-03-09 | 2017-10-27 | 青岛海澄知识产权事务有限公司 | A kind of water isolation type submerged cable connection method |
| CN105576564B (en) * | 2016-03-09 | 2018-09-14 | 青岛大学 | A kind of water proof constructing device for submerged cable connection |
| CN111219169B (en) * | 2020-01-07 | 2021-10-29 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Underwater maintainable dry working cabin |
| CN113606381B (en) * | 2021-08-02 | 2022-04-08 | 东北石油大学 | Fluid-tight operation cabin body and dry-type cabin |
| CN113415397B (en) * | 2021-08-02 | 2022-04-15 | 东北石油大学 | Light rotary unloading dry type cabin |
| CN114954852B (en) * | 2022-05-27 | 2024-05-03 | 南通大学 | Ship underwater equipment replacement device and method |
| CN115193827B (en) * | 2022-07-18 | 2024-03-22 | 浙江大学 | Underwater pipeline weight layer breaking device based on cavitation jet flow |
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| US4324195A (en) * | 1980-09-22 | 1982-04-13 | Perry Oceanographics, Inc. | Tender for submarine cable |
| CN1065046A (en) * | 1991-03-18 | 1992-10-07 | 上海宝山钢铁总厂 | Snag structure dry type handling labor cabin and operation ship thereof |
| CN1539702A (en) * | 2003-04-25 | 2004-10-27 | 北京石油化工学院 | 'cabin inside cabin' type working space for welding subwater pipeline in dry mode and under normal pressure |
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2005
- 2005-12-20 CN CNB2005101324827A patent/CN100363676C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4214387A (en) * | 1978-06-01 | 1980-07-29 | Brown & Root, Inc. | Trenching apparatus and method |
| US4324195A (en) * | 1980-09-22 | 1982-04-13 | Perry Oceanographics, Inc. | Tender for submarine cable |
| CN1065046A (en) * | 1991-03-18 | 1992-10-07 | 上海宝山钢铁总厂 | Snag structure dry type handling labor cabin and operation ship thereof |
| CN1539702A (en) * | 2003-04-25 | 2004-10-27 | 北京石油化工学院 | 'cabin inside cabin' type working space for welding subwater pipeline in dry mode and under normal pressure |
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| Title |
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| 海底管道检测与维修技术. 张剑波，袁超红.石油矿场机械，第34卷第5期. 2005 * |
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| Publication number | Publication date |
|---|---|
| CN1786544A (en) | 2006-06-14 |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: OFFSHORE OIL ENGINEERING Co.,Ltd. Patentee after: CHINA NATIONAL OFFSHORE OIL Corp. Co-patentee after: SHANGHAI JIAO TONG University Address before: No. 6, Dongzhi gate, Dongcheng District, Beijing, Beijing Co-patentee before: OFFSHORE OIL ENGINEERING Co.,Ltd. Patentee before: CHINA NATIONAL OFFSHORE OIL Corp. Co-patentee before: SHANGHAI JIAO TONG University |
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Granted publication date: 20080123 |
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