Diamond drill bit with varied cutting elements

Details Diamond drill bit with varied cutting elements Diamond drill bit with varied cutting elements

E - Fixed Constructions

21

B

255/69

E21B 10/50 (2006.01) E21B 10/42 (2006.01) E21B 10/46 (2006.01) E21B 10/56 (2006.01)

Patent

CA 1231705

ABSTRACT OF THE DISCLOSURE An earth boring bit utilizing thermally stable polycrystalline diamond material having a row of closely spaced sharp cutting elements, followed by a row of widely spaced, blunt or rounded cutting elements, each cutting element extending from a supporting matrix a predetermined amount to allow the sharp cutting elements to form small relief kerfs in a geological formation, after which the blunt or rounded cutting elements dislodge material between the kerfs. Additionally, cylindrical cutting elements are positioned near the gage or outermost portion of the matrix to enhance gage bore cutting.

472957

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