| 摘要 |
A well tool lock mandrel and running and pulling tools for installing and retrieving the lock mandrel. The lock mandrel is used for supporting a well tool such as a subsurface safety valve at a landing nipple in a well tubing string. The lock mandrel includes a tubular body, locking dogs supported in the body, an expander sleeve for operating the locking dogs, and a latch for releasably locking the expander sleeve when the locking dogs are locked outwardly. The running tool includes a head assembly for connection with a wireline tool string, an upper retainer key assembly for connection with the head of the lock mandrel, and a lower locking lug assembly for engagement with the expander sleeve of the lock mandrel for operating the sleeve. The running tool also includes a spring biased insertion sleeve for operating the lower locking lug assembly permitting the running tool to be installed in the lock mandrel when the locking dogs of the lock mandrel are at inward release positions. The pulling tool includes lugs for engaging the upper end of the lock mandrel expander sleeve to push it downwardly to a released position and a collet for engaging the head of the lock mandrel to retrieve the lock mandrel. An alternate form of the running tool permits use of the tool to set a lock mandrel which is larger in diameter than the well tool such as the safety valve supported from the lock mandrel. |
