Patent ID: 7004266

Claim:
An adjustable down-hole tool comprising: a 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 against the action of a first return spring between two positions, one being a first, deactivated position and another being a second, activated position; a sleeve, said sleeve limiting movement of said 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 or body facing the castellations on the sleeve so that, when the castellations 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 relative to the mandrel and the body by fluid pressure in the tool against the action of a second return spring and in which said piston is axially slidable with respect to said sleeve and rotationally coupled therewith.