A FORCE BALANCING SYSTEM FOR USE WITH A WELL BORE TOOL

摘要

A method and apparatus for a system for use with a well bore tool that is adapted to decouple the weight of the drill string from the operation and utilizes instead hydraulic or pneumatic pressure to advance a drilling tool into a well bore. A force balancing system is attached between the drill string and the well bore tool by pressurizing a first and second chamber in the force balancing system. The weight of the drill string is then decoupled from the well bore tool and pressurization of the second chamber is subsequently reduced when the weight of the drill string begins to move into engagement with the well bore tool.