PDC clad drill bit insert

Details PDC clad drill bit insert PDC clad drill bit insert

1996-06-07

1998-10-06

Dang, Hoang C.

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

E21B 1046

Patent

active

058163476

ABSTRACT:
An insert construction is set forth comprising a right cylinder insert body crowned with a PDC crown bonded thereto defining an interface between the two materials. The interface construction is described in geometric terms. The interface includes irregular curvilinear sided depressions to enhance the interface grip between the two materials thereby reducing shear stress concentration which might damage the PDC crown. Other failure modes are reduced also. Relationships are set forth in the amount, depth, and shape of the depressions.

REFERENCES:
patent: 5351772 (1994-10-01), Smith
patent: 5355969 (1994-10-01), Hardy et al.
patent: 5486137 (1996-01-01), Flood et al.
patent: 5544713 (1996-08-01), Dennis
patent: 5564511 (1996-10-01), Frushour
patent: 5590728 (1997-01-01), Matthias et al.
patent: 5598750 (1997-02-01), Griffin et al.
patent: 5605199 (1997-02-01), Newton
patent: 5622233 (1997-04-01), Griffin
patent: 5662720 (1997-09-01), O'Tighearnaigh

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