Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Patent
1997-10-10
1999-11-30
Tsay, Frank
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
175432, E21B 1046, E21B 1062
Patent
active
059925493
ABSTRACT:
A cutting structure for a rotary drag-type drill bit includes a preform cutting element mounted on a carrier which, in use, is mounted on the drill bit and comprises a front facing table of superhard material bonded to a less hard substrate. A portion of the carrier on which the preform cutting element is mounted is shaped, adjacent the cutting element, for engagement by a chip of formation material being removed by the cutting element from the formation being drilled so as to tend to break the chip away from the surface of the formation. A portion of the carrier, or a portion of the bit body itself, may also be shaped, adjacent the cutting element, to direct to a location in front of the cutting element a flow of drilling fluid which impinges on said surface so as to assist in chip removal.
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Camco Drilling Group Limited
Daly Jeffrey E.
Tsay Frank
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