Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Patent
1997-07-31
1999-02-23
Schoeppel, Roger J.
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
175430, 299100, 299113, E21B 1036
Patent
active
058734236
ABSTRACT:
A frustum cutting bit arrangement, including a shank portion for mounting in, and to be retained by, a rotary cutting tool body, the shank portion having an axis, an inner axial end, and an outer axial end. A head portion has an axis coincident with the shank portion axis, a front axial end, and a rear axial end, the rear end coupled to the shank portion outer end, and the front end having a conical cavity therein diminishing in diameter from the front end toward the rear end. A frustum cutting insert has an axis coincident with the head portion axis, a forward axial end, a back axial end, and an outer conical surface diminishing in diameter from the forward end toward the back end, the conical cavity and the outer conical surface having substantially the same taper, the frustum cutting insert fitting into the cavity in a taper lock. In variations of the basic invention, the head portion may be rotatable with respect to the shank portion, the frustum cutting insert may comprise a rotating cutter therein, and combinations of such features may be provided for different applications.
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Leonard A. Briese--Jul. 1996 "Harts Petroleum Engineer International", Disc Cutter Bits Offer Potential Penetration Rates, pp. 11.
Briese Industrial Technologies, Inc.
Finkelstein Don
Schoeppel Roger J.
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