DOWNHOLE TOOL ACTUATING MECHANISM

摘要

The invention relates to actuation of a downhole tool by hydraulic forces in a structure that does not employ lateral openings through the wall of the tool. By a variety of mechanisms, the tool wall is urged to flex preferably within it s elastic limits. The wall flexing either signals a sensor which senses such motion to create a corresponding signal which can unlock a piston. Thereafter, hydraulic pressure differences are employed to move the piston to operate the downhole tool.