Patent ID: 8689910
Filing Date: 2014-04-08
Classification: B23P,E21B

Abstract:
1. A rotary drag bit for drilling subterranean formations comprising: a bit body having a face extending from a centerline to a gage; a plurality of blades on the face generally extending radially outwardly toward the gage, each blade of the plurality of blades having a front edge and a trailing edge; a plurality of discrete impregnated cutting posts, each discrete impregnated cutting post of the plurality of discrete impregnated cutting posts extending outwardly from at least one blade of the plurality of blades, oriented to angle generally toward a front edge of the at least one blade and generally toward a direction of a rotation of the rotary drag bit, and located proximate the front edge of the at least one blade; and a plurality of wear control elements disposed on the at least one blade, each wear control element of the plurality of wear control elements disposed between adjacent discrete impregnated cutting posts of the plurality of discrete impregnated cutting posts and extending across the at least one blade from proximate the front edge of the at least one blade to proximate a trailing edge of the at least one blade, such that at least a portion of a surface of the at least one blade between the front edge of the at least one blade and the trailing edge of the at least one blade is recessed between adjacent wear control elements of the plurality of wear control elements and behind at least one discrete impregnated cutting post of the plurality of discrete impregnated cutting posts and is configured to allow fluid to pass over the at least a portion of the surface during use.