Sealing Arrangements for Subsea Pipe-in-Pipe Systems |
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| 申请号 | US15547791 | 申请日 | 2016-02-02 | 公开(公告)号 | US20180023767A1 | 公开(公告)日 | 2018-01-25 |
| 申请人 | Acergy France SAS; | 发明人 | Nathalie Delaunay; Gerald Gerometta; Henri Rousseau; | ||||
| 摘要 | A method of sealing an annulus of an electrically trace-heated pipe-in-pipe structure including introducing a flowable filler material to mould a sealing mass in situ is disclosed. The sealing mass closes a restriction at which the annulus is narrowed radially and embeds at least one heating element that extends generally longitudinally through the restriction. The structure includes an inner ring spaced within an outer ring to define the annulus between the rings. The annulus is narrowed radially by one or more projections that extend radially into the annulus from at least one of the rings toward the other of said rings. The restriction may include multiple bores, each of which may contain a sealing mass around a respective heating element in the bore. | ||||||
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