METHOD AND APPARATUS FOR DETERMINING DRILLING PATHS TO DIRECTIONAL TARGETS

摘要

A method and apparatus for recomputing an optimum path between a present location of a drill bit and a direction or horizontal target uses linear approximations of circular arc paths. xxxsentencexxx The technique does not attempt to return to a preplanned drilling profile when there actual drilling results deviate from the replanned profile.By recomputing an optimum path, the borehole to the target has a reduced tortuosity.