Patent ID: 6345669
Filing Date: 2002-02-12
Classification: E21B

Abstract:
A running tool which is intended to be lowered down a tubular member of the type specified, via a wireline extending from the surface to a connection to an upper end of the tool by which the tool is suspended, said tool being capable of advancing itself along the wall of the tubular member by repeated application and release of tension force in the wireline, in which the tool comprises:an assembly of a leading body portion and a trailing body portion, said portions being connected to each other so as to be linearly moveable relative to each other in order to advance the tool along the tubular member; a linearly displaceable actuator within the assembly and connectable to the wireline, said actuator being moveable from a datum position in one direction relative to the assembly upon application of tension to the wireline; means for converting relative movement of the actuator in said one direction to linear displacement of the leading body portion in an opposite direction; respective wall-engaging means on each of the body portions which can be triggered alternately into gripping contact with the wall of the tubular member; and, an energy source capable of being active between the body portions; in which the tool has a cycle of self-advancing movement.