DRILL BIT

摘要

A drag bit includes a blade extending from the bit body and supporting inner cutters proximate the longitudinal axis and outer cutters spaced from the longitudinal axis. The inner cutters are rotationally offset from the outer cutters. During operation the inner cutters deposit cut material in a channel that is contiguous with a channel that receives material cut by the outer cutters. The cutters and the contiguous channels flush agglomerating material from the slots.

主权项

1. A drill bit to advance a borehole comprising:
a bit body including a plurality of blades, each said blade supporting a plurality of cutters, at least one of the blades being an offset blade including:
an inner region supporting an inner set of cutters along a first leading edge portion of the offset blade; andan outer region supporting an outer set of cutters along a second leading edge portion of the offset blade, where the second leading edge portion is rotationally offset from the first leading edge portion.