Drilling with mixed tooth types

Details Drilling with mixed tooth types Drilling with mixed tooth types

2005-09-13

2005-09-13

Bagnell, David (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

C175S341000, C175S374000, C175S426000

Reexamination Certificate

active

06942045

ABSTRACT:
A rotary-cutter Earth-penetrating bit in which a given track of bottom hole is attacked by inserts of two different types, e.g. chisel-shaped and pointed, wider and narrower, higher and shorter, and/or of different materials. The different types of inserts can both be included within a single row of a cone.

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patent: 6527068 (2003-03-01), Singh et al.
patent: 6615935 (2003-09-01), Fang et al.

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