Wire line hold down device

Details Wire line hold down device Wire line hold down device

1988-09-19

1989-08-01

Dang, Hoang C.

Wells

With explosive or gas generating means in well

166177, 166212, 166214, E21B 43263, E21B 2304

Patent

active

048526479

ABSTRACT:
A gas generating type fracturing tool includes a propellant charge and an ignitor for initiating combustion of the propellant. When combustion starts, a pressure buildup inside the tool manipulates a brake or drag acting against the inner casing wall to retard upward movement of the tool. A shear pin fails allowing a spring to move an element into frictional engagement with the casing string.

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