CONVEX CRESTED INSERT WITH DEFLECTED WEDGE SURFACES

摘要

This invention relates to carbide inserts used on roller cone bits for oil and gas drilling applications as well as for other geological drilling applications, and more specifically, relates to the convex crested insert with deflected wedge surfaces. In order to solve the problem that the inserts of prior art cannot drill bottom hole rocks and gouge the borehole wall simultaneously and efficiently, the present disclosure proposes to arrange a width of a top surface and therefore a width of the insert crest are tapered from one end to the other. Advantages of this invention include: 1. Help for rock breaking and increase drilling efficiency of the cutters and lower the overall drilling cost; 2. higher anti-breakage capability and longer working life; and 3. when inserts of this invention are used as heel row cutting elements on bit, can achieve better gage protection of the bit.