Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1991-02-19
1992-05-12
Dang, Hoang C.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
175374, 175376, 175339, E21B 1012
Patent
active
051118947
ABSTRACT:
A drill bit for drilling in the ground includes a pair of drilling cones having axes of rotation that converge near a drilling center of the bit. The cones each include a plurality of ridges or uninterrupted cutting edges. The cutting edges of each cone are separated by troughs. During rotation of the bit, the cutting edges of one cone are aligned so as to pass along the path traversed by the troughs of the opposite cone and vice versa. Drilling fluid jets are provided and flow connect with a drilling fluid supply to provide drilling fluid under pressure for cleaning and lubrication to the cones as well as to sweep away debris dislodged by the cutting action of the cones.
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Dang Hoang C.
Williams Sybil J.
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