Well tool locking system for staggered bore
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United States of America Patent
Stats
-
Oct 16, 1990
Grant Date -
N/A
app pub date -
Feb 28, 1989
filing date -
Feb 28, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A well tool locking system adapted for releasably locking a lock mandrel and surface-controlled subsurface safety valve in a staggered well bore is disclosed. The subject locking system comprises a collapsible, slidably engaged no-go ring and locating dogs that are operatively coupled to a locking sleeve to pre-prop locking keys in the annular recesses of a landing nipple prior to applying control line pressure to the safety valve. The subject locking system is designed to lock in the direction of flow, does not require the use of shear pins, and will not release from the running tool until the safety valve is activated and the lock mandrel locking keys are fully engaged with the landing nipple.
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