Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Patent
1995-07-26
1996-06-11
Schoeppel, Roger J.
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
175434, 76DIG12, E21B 1036
Patent
active
055247199
ABSTRACT:
An insert for a drill bit is set forth. The insert is formed with an elongate body, typically having a cylindrical cross section terminating at an exposed outer end. The outer end is covered with a polycrystalline disc. In the present disclosure, the polycrystalline disc is reinforced with an insert which is wholly captured in the polycrystalline material. In one form, a circular disc is set forth. In another aspect, multiple reinforcing members can be incorporated. They have the form of multiple discs. This reduces stress concentration in the polycrystalline clad insert.
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patent: 4605343 (1986-08-01), Hibbs et al.
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patent: 4884477 (1989-12-01), Smith et al
patent: 5335738 (1994-08-01), Waldenstrom et al.
patent: 5348109 (1994-10-01), Griffin
Dennis Tool Company
Schoeppel Roger J.
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