Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet
Patent
1983-08-12
1986-12-09
Novosad, Stephen J.
Boring or penetrating the earth
Bit or bit element
Magnetized or with magnet
175410, E21B 1046
Patent
active
046275037
ABSTRACT:
A polycrystalline diamond and metal element for use as a cutting element for drilling holes or similar uses. The cutting element comprises a polycrystalline diamond center portion and at least one metal side portion. The metal side portion is made from a soft metal having a Young's Modulus less than approximately 45.times.10.sup.6 psi and is selected from a group comprising cobalt, nickel, iron, copper, silver, gold, platinum, palladium and alloys of these metals and intermetallic compounds containing these metals. Since the metal portion is sufficiently yielding the internal stresses formed in the polycrystalline diamond/metal bond during cooling and subsequent attachment to a tool body are signficantly reduced. The reduction the stress in the polycrystalline diamond/metal bond reduces fracturing in the diamond or metal and delamination of the polycrystalline diamond/metal interface during attachment to the tool and during use.
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Megadiamond Industries Inc.
Neuder William P.
Novosad Stephen J.
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