Flow through raise boring bit

Details Flow through raise boring bit Flow through raise boring bit

E - Fixed Constructions

21

B

255/72

E21B 10/10 (2006.01) E21B 7/28 (2006.01) E21B 10/28 (2006.01) E21B 10/30 (2006.01) E21B 17/10 (2006.01)

Patent

CA 1305470

ABSTRACT OF THE DISCLOSURE An improved raise boring bit to enhance cuttings removal and prevent accumulation of cuttings on the body of the bit, which utilizes a pair of radialrails and a plate connected with and strengthening the rails while defining an opening for the flow of cuttings beside the stem and the radial rails during boring. Cutter mounting means are disposed at intervals along the radial rails to permit the flow of cuttings between the rails and the mounting means. At least one wing extends radially from the plate for supporting additional cutters, a vertical stabilizer roller is mounted on the end of the wing and struts extendbetween adjacent sides of the wings for stability and support.

592254

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