Patent ID: 6742611
Filing Date: 2004-06-01
Classification: E21B,Y10T

Abstract:
A rotary-type earth-boring drill bit for drilling subterranean formations, comprising:a bladed-type bit body having at least one blade structure extending upwardly therefrom, the at least one blade structure having a major axis along which the at least one blade structure extends between a radially innermost end and a radially outermost end; and at least one preformed laminated cutting element installed on the at least one blade structure comprising at least one first segment juxtapositioned with at least one second segment; the at least one first segment having a preselected overall configuration and being of a preselected nominal thickness, the at least one first segment comprised of an essentially continuous-phase solid matrix of at least one material impregnated with at least one particulate superabrasive material in at least a portion thereof; the at least one second segment having a preselected overall configuration and being of a preselected nominal thickness, the at least one second segment comprised of a continuous-phase solid matrix material; and wherein the at least one first segment and the at least one second segment of the at least one preformed laminated cutting element extend substantially coextensively along the major axis of the at least one blade structure substantially between the radially innermost end and the radially outermost end thereof.