发明名称 |
AN UNBONDED FLEXIBLE ARMORED RISER PIPE |
摘要 |
An unbonded flexible armored pipe for transportation of fluids. The pipe has a center axis and a length and includes a carcass and an innermost sealing sheath with an inner surface surrounding the carcass. The carcass includes at least one elongate armor element wound to surround the center axis with a winding angle to the center axis defining a winding direction and a supporting surface facing towards the inner surface of the innermost sealing sheath and with a supporting surface radius Sr. The supporting surface includes a primary surface area and a plurality of restraining regions in the form of orifices in and/or protuberances and/or indentations from the primary surface area, wherein the restraining regions each have a length determined along the winding direction of the elongate armor element which is up to about Sr times Π. |
申请公布号 |
US2015368982(A1) |
申请公布日期 |
2015.12.24 |
申请号 |
US201414764675 |
申请日期 |
2014.01.30 |
申请人 |
National Oilwell Varco Denmark I/S |
发明人 |
CAPPELN Christian Ditlev;SKAANING Christian Emil |
分类号 |
E21B17/01 |
主分类号 |
E21B17/01 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
Brøndby DK |