Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or element
Patent
1987-03-23
1988-10-11
Massie, IV, Jerome
Boring or penetrating the earth
Bit or bit element
With fluid conduit lining or element
175329, E21B 1060
Patent
active
047764112
ABSTRACT:
A drag type drilling bit having a plurality of radially disposed raised lands on the bit face is disclosed. A multiplicity of polycrystalline diamond compacts are strategically disposed on the raised lands. At least a pair of lands are joined at the outside periphery of the bit thereby closing the valley formed between the lands, thus forming a plenum for drilling fluid that exits the bit interior through ports or nozzles communicating therewith. Highly turbulent fluid confined in the plenum continually scrubs and scavenges the hole bottom while simultaneously and uniformly cooling and cleaning the PDC cutters during operation of the bit in a borehole.
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Kisliuk Bruce M.
Massie IV Jerome
Smith International Inc.
Upton Robert G.
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