Roller cone drill bit shale diverter

Details Roller cone drill bit shale diverter Roller cone drill bit shale diverter

E - Fixed Constructions

21

B

E21B 10/08 (2006.01) E21B 10/18 (2006.01) E21B 10/22 (2006.01)

Patent

CA 2317909

A roller cone drill bit includes a bit body adapted to be rotated about a longitudinal axis. At least one leg which terminates in a shirttail portion depends from the bit body. The shirttail portion defines a first end face having a first circumferential groove thereon. The first circumferential groove has a radius equal to the radius of a tip of the shirttail portion. A journal is cantilevered from the leg, and a roller cone is rotatably mounted on the journal. The roller cone has a second end face adjacent to the first end face. A second circumferential groove is formed on the second end face.

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