Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or element
Patent
1993-06-09
1994-11-22
Dang, Hoang C.
Boring or penetrating the earth
Bit or bit element
With fluid conduit lining or element
175394, 175418, E21B 1038
Patent
active
053660323
ABSTRACT:
A rock bit is provided that comprises a generally cylindrical body with a leading end for boring in a rock formation and a trailing end for connection to a drill rod. The body has a generally cylindrical outside surface and comprises a plurality of parallel longitudinal grooves circumferentially spaced around the outside surface and extending from the leading end to the trailing end. The grooves have a depth that increases from the leading end to the trailing end such that the cross-sectional area of the grooves also increases towards the trailing end of the body of the bit. The body also comprises at least one channel machined in the outside surface of the body that extends between adjacent pairs of longitudinal grooves at an oblique angle to the grooves.
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