Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet
Patent
1983-12-29
1986-03-11
Novosad, Stephen J.
Boring or penetrating the earth
Bit or bit element
Magnetized or with magnet
175400, 175409, E21B 1046, E21B 1062
Patent
active
045748950
ABSTRACT:
A solid head earth boring bit has a central tungsten carbide core sealed at the lower end of a drilling fluid passage that extends through the bit to the face of the bit. The core has a nozzle passage extending through it that is offset from the axis of the drilling fluid passage. The core also has at least one cutting element secured to its face. The cutting elements are secured in holes in the core.
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Dolezal George E.
Kelly, Jr. Joseph L.
Bradley James E.
Dang Hoang C.
Felsman Robert A.
Hughes Tool Company - USA
Novosad Stephen J.
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