Lock for a downhole tool with a reset feature

Details Lock for a downhole tool with a reset feature Lock for a downhole tool with a reset feature

2007-05-01

2007-05-01

Gay, Jennifer H (Department: 3672)

Wells

Processes

Placing or shifting well part

C166S323000, C166S240000, C166S334100, C166S242700

Reexamination Certificate

active

10796593

ABSTRACT:
The lock allows two members in a downhole tool to be temporarily held together. In an application where mandrel movement is dictated by pressure cycling in combination with a J-slot mechanism, such as in a downhole valve, the mandrel is releaseably retained to an adjacent connector against mechanical impacts. The mandrel features an extended collet that moves relatively to a floating sleeve during pressure cycles. At some point the collet heads rise to an elevated groove that causes them to contact a no-go shoulder for locking. The lock is defeated be removing the collet heads from the elevated groove for normal tool operation.

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