Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Patent
1997-07-14
1999-03-02
Dang, Hoang C.
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
51293, E21B 1046
Patent
active
058758623
ABSTRACT:
A composite body cutting instrument formed of a polycrystalline diamond layer sintered to a carbide substrate with a carbide/diamond transition layer. The transition layer is made by creating carbide projections perpendicular to the plane of the carbide substrate face in a random or nonlinear orientation. The transition layer manipulates residual stress caused by both thermal expansion and compressibility differences between the two materials and thus increases attachment strength between the diamond and carbide substrate by adjusting the pattern, density, height and width of the projections.
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Jensen Kenneth M
Jurewicz Stephen R
Dang Hoang C.
Sadler Lloyd W.
U.S. Synthetic Corporation
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