Drill bit with improved insert cutter pattern

Details Drill bit with improved insert cutter pattern Drill bit with improved insert cutter pattern

1991-12-30

1993-11-30

Bagnell, David J.

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

175432, E21B 1046, E21B 1058

Patent

active

052656853

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.

REFERENCES:
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patent: 4202419 (1980-05-01), Youngblood
patent: 4323130 (1982-04-01), Dennis
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patent: 4440247 (1984-04-01), Sartor
patent: 4471845 (1984-09-01), Jurgens
patent: 4602691 (1986-07-01), Weaver
patent: 4907662 (1990-02-01), Deane
patent: 4932484 (1990-06-01), Warren et al.
patent: 4981184 (1991-01-01), Knowlton et al.
SPE 19572, "Development of a Whirl-Resistant Bit", T. M. Warren, J. F. Brett, and L. A. Sinor, Amoco Production Co. 1989.

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