Boring or penetrating the earth – Processes
Patent
1993-09-09
1994-09-13
Bagnell, David J.
Boring or penetrating the earth
Processes
175431, 175432, E21B 1046, E21B 1058
Patent
active
053460251
ABSTRACT:
A fixed cutting element drill bit is provided with primary cutting elements which are spaced radially from each other across the face of the bit. During drilling, the gap between the cutting elements causes a ridge to be formed in the bottom of the well and the apex of the ridge is removed before reaching the face of the bit. In one form of the invention, the apex is broken off by utilization of the sides of the supports for the primary cutting elements.
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SPE 19572, "Development of a Whirl-Resistant Bit", 1989 T. M. Warren, J. F. Brett, and L. A. Sinor, Amoco Production Co.
Keith Carl W.
Martin, Jr. Ed R.
Bagnell David J.
Dresser Industries Inc.
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