CN102927406A - Z-shaped-section pressure-resisting armor layer for composite hoses - Google Patents
Z-shaped-section pressure-resisting armor layer for composite hoses Download PDFInfo
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- CN102927406A CN102927406A CN2012104308934A CN201210430893A CN102927406A CN 102927406 A CN102927406 A CN 102927406A CN 2012104308934 A CN2012104308934 A CN 2012104308934A CN 201210430893 A CN201210430893 A CN 201210430893A CN 102927406 A CN102927406 A CN 102927406A
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Abstract
The invention relates to a Z-shaped-section pressure-resisting armor layer for composite hoses. The Z-shaped-section pressure-resisting armor layer is characterized by being formed by winding and interlocking a profiled bar, wherein the section of the profiled bar is Z-shaped; the section comprises a first crossbeam, a second crossbeam and a vertical beam which is used for connecting the first and second crossbeams; the first crossbeam comprises a first upper wall surface and a first lower wall surface; a groove is arranged in the first upper wall surface; a first hook-shaped structure which extends downwards is integrally arranged at the end of the first crossbeam; the second crossbeam comprises a second upper wall surface and a second lower wall surface; a second hook-shaped structure which extends upwards is integrally arranged at the end of the second crossbeam; the joints among the first crossbeam, the second crossbeam, the vertical beam, the first hook-shaped structure and the second hook-shaped structure are arc connection angles; the hook-shaped structures of the profiled bar are embedded in depressed areas formed by hook-shaped structures and vertical beams of the adjacent profiled bars; and the adjacent profiled bars are mutually meshed. The Z-shaped-section pressure-resisting armor layer has the advantages of being convenient for fixation of the end of the profiled bars and being capable of effectively preventing the adjacent sections of the pressure resisting armor layers from mutually slipping out to ensure that the composite hoses have good flexibility, thus being widely applied to the structure setting of the composite hoses.
Description
Technical field
The present invention relates to a kind of armor, particularly about a kind of ocean composite soft tube Z-type cross section resistance to compression armor.
Background technique
Traditional, conventional submarine pipeline is take steel pipe as main, whole construction, installation and follow-up maintenance work cycle, long expense was high, and the flexible compound pipeline that Abroad in Recent Years rises is because anticorrosive property is good, submarine topography landforms strong adaptability, laying speed is fast, expense is low, be difficult for wax deposition and the conveying that advantage begins to be applied to seabed oil, G﹠W such as can reuse comes up.The flexible compound pipeline comprises cohesiveencess composite soft tube and non-adhesive composite soft tube; Wherein, the cohesiveencess composite soft tube generally is squeezed into one by polymeric layer and metal enhancement layer, makes the higher bonding strength of generation between polymer material layer and metal enhancement layer by special operation after the extrusion modling, and such flexible pipe generally is applied to the short distance jumper pipe.The non-adhesive composite soft tube is to be combined by polymer material layer and the metal enhancement layer mode by physics, and layer does not need to use chemical technology bonding with interlayer, and each interlayer comes transmitted load by friction and contact, and it is better flexible.The non-adhesive composite soft tube generally is used for the pipeline of long distance and high pressure to be carried, and it is more and more extensive that it is applied in the ocean engineering conveying to crude oil or rock gas or water.The non-adhesive composite soft tube becomes the main flow structure in the flexible pipe gradually, by framework layer, inside liner, the resistance to compression armor, the tension armor, the composite pipe body structure that the multilayers such as external coating consist of, wherein the resistance to compression armor mainly provides the opposing radial force, and by profile shapes interlocking formation, profile shapes has Z, C, X, T-shaped etc., the resistance to compression armor becomes wide-angle to be entwined by profile shapes with tubular axis, winding angle is generally close to 90 degree, can provide larger circumferential force to press than imperial palace with opposing, inside liner is played effect of contraction, prevent the inside liner explosion, the resistance to compression armor has certain gap after twining between adjacent cross section, can make composite soft tube have certain flexibility.It is joint that the resistance to compression armor can provide the prerequisite of pressing than imperial palace has well fixing to the end of resistance to compression armor steel wire, when joint can not provide well fixedly to resistance to compression armor steel cord end, the resistance to compression armor can not provide the ability of pressing in the opposing well, it passes to the tension armor with interior pressure soon, because the steel wire winding angle of tension armor is less of 30 degree～40 degree, the tension armor mainly is the opposing axial force, the ability of opposing circumferential force is very weak, and joint and resistance to compression armor steel cord end is fixing extremely important thus.Owing between adjacent cross section certain gap is arranged, although guaranteed like this composite soft tube certain flexibility is arranged, but brought simultaneously hidden danger, when excessive or axial motion is excessive when bending, motion between adjacent sections is excessive, the possibility that mutually skids off is arranged between adjacent cross section, cause cross section interlocking function forfeiture.
Summary of the invention
For the problems referred to above, the purpose of this invention is to provide and a kind ofly can interlock, prevent that resistance to compression armor adjacent sections from skidding off mutually, and can make composite soft tube have the composite soft tube Z-type cross section resistance to compression armor of better flexibility.
For achieving the above object, the present invention takes following technological scheme: a kind of composite soft tube Z-type cross section resistance to compression armor, it is characterized in that: it adopts profile shapes to twine interlocking and forms, the cross section of described profile shapes is the Z-type cross section, this described cross section comprises first crossbeam, second cross beam, and the vertical beam that connects described first crossbeam and second cross beam; Described first crossbeam comprises the first upper wall surface and the first lower wall surface, is provided with groove on described the first upper wall surface, and the end of described first crossbeam is wholely set first hook formation to downward-extension; Described second cross beam comprises the second upper wall surface and the second lower wall surface, and the end of described second cross beam has been wholely set upwardly extending second hook formation; Described vertical beam comprises the first side wall and the second sidewall; Described groove is arranged on the first upper wall surface of described first crossbeam, and is positioned at the position that is connected with described vertical beam; Being connected of the first upper wall surface of the both sides of described groove and described first crossbeam all adopts the arc angle of attachment to connect; Described the first hook formation comprises the first exterior side wall and the first internal side wall, and the first hook portion end face that connects described the first exterior side wall and the first internal side wall; Described the first exterior side wall connects with the employing arc angle of attachment that is connected of the first upper wall surface of described first crossbeam; The two ends of described the first hook portion end face and described the first exterior side wall be connected the joint of internal side wall and also adopt the arc angle of attachment to be connected; Being connected of the first lower wall surface of described the first internal side wall and described first crossbeam also adopts the arc angle of attachment to connect; The first lower wall surface of described first crossbeam connects with also adopting the arc angle of attachment being connected of the first side wall of described vertical beam; Being connected of the second lower wall surface of the first side wall of described vertical beam and described second cross beam also adopts the arc angle of attachment to connect; Described the second hook formation comprises the second exterior side wall and the second internal side wall, and the second hook portion end face that connects described the second exterior side wall and the second internal side wall; Described the second exterior side wall connects with the employing arc angle of attachment that is connected of the second lower wall surface of described second cross beam; Described the second hook portion end face two ends also adopt the arc angle of attachment to connect with described the second exterior side wall being connected of internal side wall with being connected; Described the second internal side wall is connected with the second upper wall surface of described second cross beam and also adopts the arc angle of attachment to connect; The second upper wall surface of described second cross beam connects with also adopting the arc angle of attachment being connected of the second sidewall of described vertical beam; The second sidewall of described vertical beam connects with also adopting the arc angle of attachment being connected of the first upper wall surface of described first crossbeam; The hook formation of described profile shapes is embedded in the sunk area that the hook formation of adjacent described profile shapes and described vertical beam form, and adjacent described profile shapes is engaged.
The ratio range of the Z-type section thickness of the degree of depth of described groove and described profile shapes is 2.5%～5%.
The ratio range of the width of described groove and the degree of depth of described groove is 3～5.
The bottom of described groove is arc, and the both sides of described groove are all tangent with the bottom circular arc of described groove.
Described profile shapes is the steel wire with Z-type cross section.
The winding angle of described profile shapes and composite soft tube tubular axis is close to 90 degree.
The present invention is owing to take above technological scheme, it has the following advantages: 1, the cross section that the present invention forms the profile shapes of resistance to compression armor is the Z-type cross section, this cross section comprises hook formation, groove and sunk area, the profile shapes adjacent sections is engaged after twining, the interior pressure of inside liner is converted into the pulling force of resistance to compression armor steel wire, the ability of pressing in the opposing is provided, simultaneously owing to mutually have certain gap between the cross section of interlock, when bending, composite soft tube can make the mutually motion in certain interval of resistance to compression armor profile shapes adjacent sections, the resistance to compression armor does not bear moment of flexure, has good flexibility simultaneously yet.2, be provided with groove on the first upper wall surface of the first crossbeam of profile shapes of the present invention, groove is convenient to the chucking of snap ring and steel cord end, effectively guarantees the fixing of joint and steel cord end.3, the skin of resistance to compression armor of the present invention is abrasionproof extrusion molding layer, and abrasionproof extrusion molding layer fills up the groove on the resistance to compression armor profile shapes, has limited thus the motion of the profile shapes adjacent sections of resistance to compression armor.Profile shapes end fixing of joint and resistance to compression armor is convenient in the present invention, can effectively prevent mutually skidding off of resistance to compression armor adjacent sections simultaneously, makes composite soft tube have good flexibility, and therefore, the structure that can be widely used in composite soft tube arranges.
Description of drawings
Fig. 1 is composite hose structure schematic representation of the present invention
Fig. 2 is composite soft tube resistance to compression armor schematic cross-section of the present invention
Fig. 3 is composite soft tube resistance to compression armor adjacent different section bar of the present invention cross section interlocking schematic representation
Embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
As shown in Figure 1, composite hose structure involved in the present invention comprises framework layer 1, inside liner 2, resistance to compression armor 3, the first abrasionproof extrusion molding layer 4, the first tension armor 5, the second abrasionproof extrusion molding layer 6, the second tension armor 7, the 3rd abrasionproof extrusion molding layer 8, thermal insulation layer 9, external coating 10 successively from the internal layer to the skin.Wherein, framework layer 1 is formed by the interlocking steel strip winding, is used for preventing the conquassation of inside liner 2, framework layer 1 interior conveying fluid; Inside liner 2 is for carrying the sealing layer of fluid, and inside liner 2 outer winding one decks also can twine Multi-layer compressive armor 3, and resistance to compression armor 3 is non-adhesive layer, the mutually changing of the relative positions of interlayer.External coating 7 can prevent effectively that the fluid around the composite soft tube from flowing to armor.
As shown in Figure 2, resistance to compression armor 3 of the present invention twines interlocking by profile shapes 11 and forms, and the winding angle of profile shapes 11 and composite soft tube tubular axis is close to 90 degree.The cross section of profile shapes 11 of the present invention is the Z-type cross section, and this cross section comprises first crossbeam 12, second cross beam 13, and the vertical beam 14 that connects first crossbeam 12 and second cross beam 13, and first crossbeam 12, second cross beam 13 and vertical beam 14 form the Z-type structure.First crossbeam 12 comprises on the first upper wall surface 15 and the first lower wall surface 16, the first upper wall surfaces 15 and is provided with groove 17 that the end of first crossbeam 12 is wholely set first hook formation 18 to downward-extension.Second cross beam 13 comprises the second upper wall surface 19 and the second lower wall surface 20, and the end of second cross beam 13 has been wholely set upwardly extending second hook formation 21.Vertical beam 14 comprises the first side wall 22 and the second sidewall 23.Between the first hook formation 18 and the vertical beam 14, all form sunk area between the second hook formation 21 and the vertical beam 14.
As shown in Figure 2, groove 17 is arranged on the first upper wall surface 15 of first crossbeam 12, and is positioned at the position that is connected with vertical beam 14.The both sides 24 of groove 17 connect with all adopting arc angle of attachment 25 being connected of the first upper wall surface 15 of first crossbeam 12.
As shown in Figure 2, the first hook formation 18 comprises the first exterior side wall 26 and the first internal side wall 27, and connects the 1 of the first exterior side wall 26 and the first internal side wall 27.The first exterior side wall 26 connects with the employing arc angle of attachment 25 that is connected of the first upper wall surface 15 of first crossbeam 12; The two ends of the first hook portion end face 28 and the first exterior side wall 26 be connected the joint of internal side wall 27 and also adopt arc angle of attachment 25 to be connected; Being connected of the first lower wall surface 16 of the first internal side wall 27 and first crossbeam 12 also adopts arc angle of attachment 25 to connect; The first lower wall surface 16 of first crossbeam 12 connects with also adopting arc angle of attachment 25 being connected of the first side wall 22 of vertical beam 14; The first side wall 22 of vertical beam 14 connects with also adopting arc angle of attachment 25 being connected of the second lower wall surface 20 of second cross beam 13.
As shown in Figure 2, the second hook formation 21 comprises the second exterior side wall 29 and the second internal side wall 30, and the second hook portion end face 31 that connects the second exterior side wall 29 and the second internal side wall 30.The second exterior side wall 29 connects with the employing arc angle of attachment 25 that is connected of the second lower wall surface 20 of second cross beam 13; The second hook portion end face 31 two ends also adopt arc angle of attachment 25 to connect with the second exterior side wall 29 being connected of internal side wall 30 with being connected; The second internal side wall 30 is connected with the second upper wall surface 19 of second cross beam 13 and also adopts arc angle of attachment 25 to connect; The second upper wall surface 19 of second cross beam 13 connects with also adopting arc angle of attachment 25 being connected of the second sidewall 23 of vertical beam 14.The second sidewall 23 of vertical beam 14 connects with also adopting arc angle of attachment 25 being connected of the first upper wall surface 15 of first crossbeam 12.
In the above-mentioned example, the ratio range of the Z-type section thickness of the degree of depth of groove 17 and profile shapes 11 is 2.5%～5%; The ratio range of the degree of depth of the width of groove 17 and groove 17 is 3～5; The circumscription of the relative position of groove 17, the degree of depth, width is less for the Z-type stress distribution impact of profile shapes 11.
In the above-mentioned example, the bottom of groove 17 is arc, and the both sides of groove 17 are all tangent with the bottom circular arc of groove 17.
In the above-mentioned example, twining the profile shapes 11 that forms resistance to compression armor 3 is steel wire, and steel wire generally adopts carbon steel, and the cross section of profile shapes 11 is the Z-type cross section, forms resistance to compression armor 3 by the winding to profile shapes 11.
The winding, molding method of resistance to compression armor 3 of the present invention may further comprise the steps.
1) profile shapes 11 is steel wire, and the cross section is the Z-type cross section, this cross section comprises hook formation, groove, sunk area, profile shapes 11 is wrapped in the periphery of inside liner 2, form resistance to compression armor 3, the adjacent sections of profile shapes 11 is engaged after twining, namely as shown in Figure 3, the hook formation of profile shapes 11 is embedded in the sunk area that the hook formation of adjacent different section bar 11 and vertical beam form, thereby engaged with adjacent different section bar 11, mutually there is certain gap between the cross section of interlock simultaneously, can make adjacent sections mutually motion in certain interval of resistance to compression armor 3 profile shapes 11 when composite soft tube bends, resistance to compression armor 3 does not bear moment of flexure, the interior pressure of inside liner 2 is converted into the pulling force of resistance to compression armor 3 steel wires, the ability of pressing in the opposing is provided, has also had good flexibility simultaneously.
2) skin of resistance to compression armor 3 is abrasionproof extrusion molding layer, and abrasionproof extrusion molding layer fills up the groove 17 on resistance to compression armor 3 profile shapes 11, has limited thus the motion of profile shapes 11 adjacent sections of resistance to compression armor 3.
3) by the steel cord end chucking of snap ring and resistance to compression armor 3, again snap ring and joint are fixed.
4) be provided with groove 17 on the first upper wall surface 15 of the first crossbeam 12 of profile shapes 11, groove 17 is convenient to the chucking of snap ring and steel cord end, effectively guarantees the fixing of joint and steel cord end.
The various embodiments described above only are used for explanation the present invention, and wherein the structure of each parts, Placement etc. all can change to some extent, and every equivalents and improvement of carrying out on the basis of technical solution of the present invention all should do not got rid of outside protection scope of the present invention.
Claims (10)
1. composite soft tube Z-type cross section resistance to compression armor, it is characterized in that: it adopts profile shapes to twine interlocking and forms, the cross section of described profile shapes is the Z-type cross section, and this described cross section comprises first crossbeam, second cross beam, and the vertical beam that connects described first crossbeam and second cross beam; Described first crossbeam comprises the first upper wall surface and the first lower wall surface, is provided with groove on described the first upper wall surface, and the end of described first crossbeam is wholely set first hook formation to downward-extension; Described second cross beam comprises the second upper wall surface and the second lower wall surface, and the end of described second cross beam has been wholely set upwardly extending second hook formation; Described vertical beam comprises the first side wall and the second sidewall;
Described groove is arranged on the first upper wall surface of described first crossbeam, and is positioned at the position that is connected with described vertical beam; Being connected of the first upper wall surface of the both sides of described groove and described first crossbeam all adopts the arc angle of attachment to connect;
Described the first hook formation comprises the first exterior side wall and the first internal side wall, and the first hook portion end face that connects described the first exterior side wall and the first internal side wall; Described the first exterior side wall connects with the employing arc angle of attachment that is connected of the first upper wall surface of described first crossbeam; The two ends of described the first hook portion end face and described the first exterior side wall be connected the joint of internal side wall and also adopt the arc angle of attachment to be connected; Being connected of the first lower wall surface of described the first internal side wall and described first crossbeam also adopts the arc angle of attachment to connect; The first lower wall surface of described first crossbeam connects with also adopting the arc angle of attachment being connected of the first side wall of described vertical beam; Being connected of the second lower wall surface of the first side wall of described vertical beam and described second cross beam also adopts the arc angle of attachment to connect;
Described the second hook formation comprises the second exterior side wall and the second internal side wall, and the second hook portion end face that connects described the second exterior side wall and the second internal side wall; Described the second exterior side wall connects with the employing arc angle of attachment that is connected of the second lower wall surface of described second cross beam; Described the second hook portion end face two ends also adopt the arc angle of attachment to connect with described the second exterior side wall being connected of internal side wall with being connected; Described the second internal side wall is connected with the second upper wall surface of described second cross beam and also adopts the arc angle of attachment to connect; The second upper wall surface of described second cross beam connects with also adopting the arc angle of attachment being connected of the second sidewall of described vertical beam; The second sidewall of described vertical beam connects with also adopting the arc angle of attachment being connected of the first upper wall surface of described first crossbeam;
The hook formation of described profile shapes is embedded in the sunk area that the hook formation of adjacent described profile shapes and described vertical beam form, and adjacent described profile shapes is engaged.
2. a kind of composite soft tube Z-type cross section resistance to compression armor as claimed in claim 1, it is characterized in that: the ratio range of the Z-type section thickness of the degree of depth of described groove and described profile shapes is 2.5%～5%.
3. a kind of composite soft tube Z-type cross section resistance to compression armor as claimed in claim 1, it is characterized in that: the ratio range of the width of described groove and the degree of depth of described groove is 3～5.
4. a kind of composite soft tube Z-type cross section resistance to compression armor as claimed in claim 2, it is characterized in that: the ratio range of the width of described groove and the degree of depth of described groove is 3～5.
5. as claimed in claim 1 or 2 or 3 or 4 a kind of composite soft tube Z-type cross section resistance to compression armor, it is characterized in that: the bottom of described groove is arc, the both sides of described groove are all tangent with the bottom circular arc of described groove.
6. as claimed in claim 1 or 2 or 3 or 4 a kind of composite soft tube Z-type cross section resistance to compression armor, it is characterized in that: described profile shapes is the steel wire with Z-type cross section.
7. a kind of composite soft tube Z-type cross section resistance to compression armor as claimed in claim 5, it is characterized in that: described profile shapes is the steel wire with Z-type cross section.
8. such as claim 1 or 2 or 3 or 4 or 7 described a kind of composite soft tube Z-type cross section resistance to compression armors, it is characterized in that: the winding angle of described profile shapes and composite soft tube tubular axis is close to 90 degree.
9. a kind of composite soft tube Z-type cross section resistance to compression armor as claimed in claim 5 is characterized in that: the winding angle of described profile shapes and composite soft tube tubular axis is close to 90 degree.
10. a kind of composite soft tube Z-type cross section resistance to compression armor as claimed in claim 6 is characterized in that: the winding angle of described profile shapes and composite soft tube tubular axis is close to 90 degree.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104308934A CN102927406A (en) | 2012-11-01 | 2012-11-01 | Z-shaped-section pressure-resisting armor layer for composite hoses |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104308934A CN102927406A (en) | 2012-11-01 | 2012-11-01 | Z-shaped-section pressure-resisting armor layer for composite hoses |
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| CN102927406A true CN102927406A (en) | 2013-02-13 |
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| CN2012104308934A Pending CN102927406A (en) | 2012-11-01 | 2012-11-01 | Z-shaped-section pressure-resisting armor layer for composite hoses |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613252A (en) * | 2015-02-16 | 2015-05-13 | 马鑫 | Buckle type framework hose |
| CN107606339A (en) * | 2017-11-21 | 2018-01-19 | 舟山三力机械有限公司 | Offshore oil flexible duct Z-shape steel band |
| CN108825929A (en) * | 2018-09-07 | 2018-11-16 | 广州远和船海研究院有限公司 | Composite compression-resistant armor layer of flexible pipe |
| CN108843865A (en) * | 2018-09-07 | 2018-11-20 | 广州远和船海研究院有限公司 | Flexible pipe compression-resistant armor layer |
| CN112901866A (en) * | 2021-02-01 | 2021-06-04 | 中国石油大学(北京) | Profiled bar and compression-resistant armor layer for marine non-bonded composite flexible hose |
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| US5275209A (en) * | 1988-05-09 | 1994-01-04 | Institut Francais Du Petrole | Hose including an aluminum alloy |
| CN101334122A (en) * | 2007-06-28 | 2008-12-31 | 韦尔斯特里姆国际有限公司 | Flexible pipe |
| CN102272504A (en) * | 2008-11-12 | 2011-12-07 | 韦尔斯特里姆国际有限公司 | Armour reinforcement |
| CN202955355U (en) * | 2012-11-01 | 2013-05-29 | 中国海洋石油总公司 | Z-shaped-section pressure-resistant armored layer of composite hose |
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2012
- 2012-11-01 CN CN2012104308934A patent/CN102927406A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5275209A (en) * | 1988-05-09 | 1994-01-04 | Institut Francais Du Petrole | Hose including an aluminum alloy |
| CN101334122A (en) * | 2007-06-28 | 2008-12-31 | 韦尔斯特里姆国际有限公司 | Flexible pipe |
| CN102272504A (en) * | 2008-11-12 | 2011-12-07 | 韦尔斯特里姆国际有限公司 | Armour reinforcement |
| CN202955355U (en) * | 2012-11-01 | 2013-05-29 | 中国海洋石油总公司 | Z-shaped-section pressure-resistant armored layer of composite hose |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613252A (en) * | 2015-02-16 | 2015-05-13 | 马鑫 | Buckle type framework hose |
| CN107606339A (en) * | 2017-11-21 | 2018-01-19 | 舟山三力机械有限公司 | Offshore oil flexible duct Z-shape steel band |
| CN108825929A (en) * | 2018-09-07 | 2018-11-16 | 广州远和船海研究院有限公司 | Composite compression-resistant armor layer of flexible pipe |
| CN108843865A (en) * | 2018-09-07 | 2018-11-20 | 广州远和船海研究院有限公司 | Flexible pipe compression-resistant armor layer |
| CN112901866A (en) * | 2021-02-01 | 2021-06-04 | 中国石油大学(北京) | Profiled bar and compression-resistant armor layer for marine non-bonded composite flexible hose |
| CN112901866B (en) * | 2021-02-01 | 2021-11-16 | 中国石油大学(北京) | Profiled bar and compression-resistant armor layer for marine non-bonded composite flexible hose |
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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Applicant after: China National Offshore Oil Corporation Applicant after: CNOOC Research Institute Applicant after: NEPTUNE OFFSHORE ENGINEERING DEVELOPMENT CO., LTD. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Applicant before: China National Offshore Oil Corporation Applicant before: CNOOC Research Institute Applicant before: Haiwangxing Ocean Engineering Technology Co., Ltd, Tianjin City |
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Application publication date: 20130213 |