Expanded coverage carbide compact

Details Expanded coverage carbide compact Expanded coverage carbide compact

2006-03-14

2006-03-14

Neuder, William (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

C175S434000

Reexamination Certificate

active

07011169

ABSTRACT:
A drill bit with rolling cone cutters for drilling a borehole in an earthen formation. The bit has a bit body, at least one leg depending from the bit body, a rolling cone rotatably mounted on the leg, the cone having a plurality of adjacent rows of cutters thereupon, at least one hole formed within the cone, the hole having a cylindrical wall, and a cutting element partially disposed within the hole, the cutting element having a cylindrical base which fits within the cylindrical wall of said hole, a shoulder which extends outward from the base of the cutting element, and an exposed cutting end extending from the shoulder, the cutting end being substantially symmetrical about a longitudinal axis of the cutting element.

REFERENCES:
patent: 4978173 (1990-12-01), Rothkegel
patent: 5823277 (1998-10-01), Delwiche et al.
patent: 5837071 (1998-11-01), Andersson et al.
patent: 6161634 (2000-12-01), Minikus et al.
patent: 6241034 (2001-06-01), Steinke et al.
patent: 6367568 (2002-04-01), Steinke et al.
patent: 6394199 (2002-05-01), Skyles et al.
patent: 2003/0188896 (2003-10-01), Minikus et al.
patent: 2004/0163851 (2004-08-01), McDonough et al.

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