Inventors:
Paul E. Pastusek - Salt Lake City UT
Steve R. Matson - West Valley City UT
Assignee:
Baker Hughes Incorporated - Houston TX
International Classification:
E21B 1026
E21B 1046
E21C 2510
Abstract:
A multi-bladed reaming apparatus for enlarging a subterranean borehole, the apparatus having a tubular body with a plurality of longitudinally-extending, circumferentially-spaced, generally radially-extending blades carrying cutting elements, the blades being unequally spaced about the body. The cutting depth of the cutting elements on at least one of the blades is adjusted to modify the distribution of the depth of cut (DOC) among the cutting elements to substantially equalize the volume of formation material removed by the blades. Wear is reduced and the potential for premature failure of cutting elements on any single blade is alleviated.