The step chisel

When using paddle bits, rock destruction occurs along one exposure surface. However, it is known that an increase in the number of outcrop planes changes the nature of the deformation of rocks, which contributes to their better destruction. Based on this, the design of a stepped bit is developed.
The working surfaces of the blades are reinforced with natural diamond teeth. Stepped bits allowed to increase the mechanical speed of rotary drilling by an average of 25%, which led to a reduction in bit wear and a reduction in the cost of a meter of drilling.