Patent ID: 6708785
Filing Date: 2004-03-23
Classification: E21B

Abstract:
An adjustable down-hole tool comprisinga body having a through bore; a mandrel axially movable and rotationally fixed in the body, the mandrel being movable by fluid pressure in the tool between a first, activated position and a second deactivated position; a sleeve, said sleeve limiting movement of,aid mandrel between said positions; at least two sets of castellations, one set on the sleeve and the other set on an edge of the mandrel facing the castellations on the sleeve so that, when the castellation are in phase, the mandrel is prevented from travelling from said first to second position and when they are out of phase they interdigitate and the mandrel is not prevented from travelling from said first to second position; and means to rotate the sleeve relative to the facing edge between said in-phase and out-of-phase positions; wherein said means comprises a control piston slidable in or on the mandrel and in the body and being movable by fluid pressure in the tool against the action of a first return spring and in which said piston is axially slidable with respect to said sleeve and rotationally fixed with respect thereto.