Rotary drill bit for deep-well drilling

Details Rotary drill bit for deep-well drilling Rotary drill bit for deep-well drilling

E - Fixed Constructions

21

B

255/69

E21B 10/38 (2006.01) E21B 10/42 (2006.01) E21B 10/46 (2006.01) E21B 10/56 (2006.01)

Patent

CA 1159047

ABSTRACT: ROTARY DRILL BIT FOR DEEP-WELL DRILLING 1. A rotary drill bit for deep-well drilling, consisting of a body member 1, a threaded pin 2, for connection to a drilling string or the like rotary drive and a head which is provided with cutting elements which extend from the base region of the head into its central region and are combined, in groups in the form of rows or strips, as cutters 3, 4 projecting beyond the outer periphery of the bit, said cutting elements comprising both cutting elements 6 which have only one plane cutting face and?cutting elements 5 with a divided cutting face the component faces of the divided cutiing face being at a mutual angle to one another of less than 180°.

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