Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Patent
1997-03-11
1999-04-06
Tsay, Frank
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
175432, E21B 1046
Patent
active
058905529
ABSTRACT:
Superabrasive cutting elements for rolling cutter bits, and mounting techniques for such cutting elements. The insert-type cutting elements employ self-supporting superabrasive masses on the exposed tips thereof, the elements being mounted to the rolling cutters by insertion of supporting stud-like insert bodies into apertures in the cutter shells so that the exposed exterior of the interface between the superabrasive mass and the supporting cemented tungsten carbide stud lies outside of the depth of cut of the cutting element into the formation, and in some instances beneath the surface of the shell. The self-supporting superabrasive mass may comprise the entire tip of an insert, or the mass may be of a size and orientation to sustain a particular magnitude and direction of loading, the remainder or a majority of the insert tip being covered by a thinner superabrasive shell Further, the cemented carbide stud material may be configured to extend into the superabrasive tip, and may contain one or more recesses sized and configured to receive a portion of the superabrasive mass so as to provide a self-supporting superabrasive mass against selected loads.
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Pessier Rudolf C. O.
Scott Danny E.
Baker Hughes Incorporated
Tsay Frank
LandOfFree
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