| 摘要 |
There is described a method and an apparatus for testing or isolating a section of pipe, the apparatus comprising a cylindrical mandrel for insertion into a section of pipe, the mandrel including at least one portion of progressively increasing diameter, and at least one seal disposed around the mandrel and actuatable in response to applied fluid pressure to move along the increasing diameter portion of the mandrel, causing the seal member to radially expand into sealing contact with an inne r surface of the pipe.
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