| 摘要 |
The present invention discloses apparatus and methods that can be used to sever a control line. One embodiment of the invention is a shear sub comprising a first member and a second member that are releasably attached to each other. The first and second members define a control line passageway. The control line passageway comprises a pair of shearing blades that are adapted to shear a control line during release of the first member from the second member.
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