| 摘要 |
<p>Well tools for running and setting a well safety value including a lock mandrel for releasably locking the valve at a no-go landing nipple in a well bore and a running tool for running and setting the lock mandrel. The lock mandrel includes a body provided with a no-go ring, locking dogs on the body, and an expander sleeve movable upwardly in the body for expanding and locking the dogs. The running tool includes a tubular core having an end engageable with an operating tube of the safety valve, an upper latch key assembly for engaging the lock mandrel housing to couple the running tool on the lock mandrel, a lower collet assembly for operating the expander sleeve of the lock mandrel to expand the locking dogs, and a head for connecting the running tool in a wireline tool string. The running tool has locking features which apply a force from a spring of the safety valve to the latch keys to lock the running tool in the lock mandrel. A safety valve is connected on the lock mandrel which is coupled on the running tool. The assembly is lowered in a well to a no-go nipple. A control fluid pressure to the safety valve relieves the spring force from the running tool core and the running tool is pulled upwardly expanding the lock mandrel dogs and releasing the running tool from the lock mandrel.</p> |
