IMPREGNATED ROTARY DRAG BIT AND RELATED METHODS

摘要

A drill bit (100) is provided that employs a plurality of discrete, post-like, abrasive, particulate-impregnated cutting structures (118) extending upwardly from the bit face. The cutting structures may be disposed on abrasive, particulate-impregnated blades (108) that also define a plurality of fluid passages (116) on the bit face (106). One or more of the cutting structures may include outermost ends that exhibit a cross-sectional geometry that is elongated in a direction along a defined axis. The cutting structures may be oriented such that the defined axis (132) is neither coplanar with, nor parallel to, an intended rotational path of the at least one discrete cutting structure during operation of the bit. In one embodiment, the cutting structure is oriented such that the defined axis is at an acute angle relative to a tangent of the intended rotational path for the associated cutting structure. Other or different features may include, for example, additional, differently configured cutting elements.