Chip relief for rock bits

Details Chip relief for rock bits Chip relief for rock bits

E - Fixed Constructions

21

B

255/74

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

Patent

CA 1231091

CHIP RELIEF FOR ROCK BITS ABSTRACT OF THE DISCLOSURE This invention relates to roller cone, air circulation type rock bits. Means are provided on the rock bit body as well as on the shirttail portion of each of the legs extending from the body to provide a relief to pass rock chips from the borehole bottom and up the drill string as the air circulation roller cone bit works in a formation.

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