DRILL BIT FOR ROTARY DRILLING Russian patent published in 1995 - IPC

Abstract RU 2043478 C1

FIELD: hole drilling. SUBSTANCE: drill bit for rotary drilling has body with two wings, hard alloy inserts secured to wings with convex front face in form of obtuse-angles wedge, external and internal side faces and two additional hard-alloy inserts with flat front faces of wedge-shaped plates and lagging behind the latter in height. Front faces of additional plates and adjacent sections of front faces of wedge-shaped plates have counter inclination relative to drill nit diametrical plane. EFFECT: higher efficiency. 5 cl, 3 dwg, 4 tbl

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RU 2 043 478 C1

Authors

Baturin Ju.E.

Petrov A.I.

Baturin A.Ju.

Smirnov G.F.

Dates

1995-09-10—Published

1992-02-19—Filed