Boring or penetrating the earth – Bit or bit element – Impact or percussion type
Patent
1979-06-13
1981-07-28
Leppink, James A.
Boring or penetrating the earth
Bit or bit element
Impact or percussion type
175404, 175405, E21B 1048
Patent
active
042805732
ABSTRACT:
A rock-breaking tool for preferable use in self-propelled percussive machines for boring wells, comprising a casing with a pointed portion and an end face. The casing has an annular cutting edge formed by the pointed portion and inner tapered surface thereof. The casing is formed with a cone-shaped chamber open at the end face thereof, oriented toward the bottom of a well being drilled, the internal surface of the chamber intersecting with the conical surface of the annular cutting edge. The casing is also provided with ducts communicating the chamber with the surrounding space.
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Kamensky Veniamin V.
Sudnishnikov Boris V.
Tupitsyn Konstantin K.
Tupitsyn Sergei K.
Varnello Eduard P.
Favreau Richard E.
Leppink James A.
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