发明名称 |
APPARATUS AND METHOD FOR ISOLATING A SECTION OF A PIPE RISER BORE IN THE COURSE OF RISER RENEWAL |
摘要 |
The isolation tool works at depth in the bore of a pipe whose upper end is to be severed and replaced. The tool isolates the lower pipe bore from the upper bore so that flammable downhole fluid is prevented from reaching a welding site along the pipe wall. The tool incorporates: means for establishing a pair of axially spaced apart annular seals engaging the pipe inner surface; means for venting downhole fluid to ground surface. The tool is primarily mechanical in nature. It finds use in connection with off-shore platform riser renewal operations. |
申请公布号 |
CA2847874(A1) |
申请公布日期 |
2014.10.05 |
申请号 |
CA20142847874 |
申请日期 |
2014.03.31 |
申请人 |
CAR-BER INVESTMENTS INC. |
发明人 |
BERUBE, GUY;BROWN, GRAHAM T.;BLAIR, TOM |
分类号 |
E21B33/128;E21B23/06;E21B29/12;E21B33/12;F16L55/132 |
主分类号 |
E21B33/128 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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