Boring or penetrating the earth – Processes
Patent
1992-08-25
1994-04-19
Neuder, William P.
Boring or penetrating the earth
Processes
1754702, 175434, 761082, E21B 1052
Patent
active
053037855
ABSTRACT:
A diamond drag bit is disclosed with a plurality of radially disposed raised rib portions formed in a cutting end of the bit body. One or more nozzles formed in the cutting end directs drilling fluid through the valleys formed by the ribs and over the ribs during operation of the bit in an earthen formation. Diamond cutters are strategically positioned in an outer face of the ribs. A multiplicity of diamond segments forming at least one flat surface thereon are strategically positioned and secured flush with the outer surface of the raised rib both rearwardly and laterally of each of the diamond cutters. The flush segments serve to protect a trailing edge of the raised ribs during drag bit operation.
REFERENCES:
patent: 4554986 (1985-11-01), Jones
patent: 4718505 (1988-01-01), Fuller
patent: 4889017 (1989-12-01), Fuller et al.
patent: 4991670 (1991-02-01), Fuller et al.
Neuder William P.
Smith International Inc.
Upton Robert G.
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