| 摘要 |
A lockable swivel (4) for use in drilling applications which allows the operator to selectively engage and disengage the swivel (4). The lockable swivel (4) is comprised of a locking mandrel (7) carried in a body (3) which engages, upon actuation, splined surfaces (20,21) within the swivel mandrel (5) thereby locking the two together. Various methods for the use of the lockable swivel (4) in wireline and other drilling operations are demonstrated.
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