Rotary spade drill arrangement

Details Rotary spade drill arrangement Rotary spade drill arrangement

1997-07-31

2000-04-04

Neuder, William

Boring or penetrating the earth

Bit or bit element

Impact or percussion type

175431, E21B 1046

Patent

active

060449195

ABSTRACT:
A rotary spade drill arrangement comprising a combination spade drill body having a rotational axis, a shank portion, and a generally planar spade cutter portion with a pair of oppositely directed cutting edges extending radially of the axis, and a rotatable frusto conical cutter mounted on the spade cutter portion adjacent the maximum radial extent of each cutting edge.

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Leonard A. Briese--Jul. 1996 "Harts Petroleum Engineer International", Disc Cutter Bits Offer Potential Penetration Rates, p. 11.

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