Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1985-06-10
1986-12-23
Lechert, Jr., Stephen J.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
76108A, 148127, 172747, 175332, 175374, 175410, 419 8, 419 36, 419 42, 419 49, 419 68, E21B 1000
Patent
active
046306927
ABSTRACT:
The method of forming a cutter, which includes a core and a wear resistant insert defining a body means which includes
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CDP, Ltd.
Haefliger William W.
Lechert Jr. Stephen J.
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