Single cone rock bit having inserts adapted to maintain hole...

Details Single cone rock bit having inserts adapted to maintain hole... Single cone rock bit having inserts adapted to maintain hole...

2006-09-05

2006-09-05

Neuder, William (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

C175S365000, C175S399000

Reexamination Certificate

active

07100711

ABSTRACT:
A roller cone drill bit is disclosed which includes a bit body adapted to be coupled to a drill string. A bearing journal depends from the bit body. A single roller cone is rotatably attached to the bearing journal. The roller cone has a plurality of inserts disposed at selected positions about the cone. The journal defines a rotation angle with respect to an axis of rotation of the bit such that the roller cone includes a wall contact zone and a bottom contact zone. At least one of the inserts disposed in the wall contact zone has an extension portion terminating in a substantially planar upper surface.

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UK Combined Search and Examination Report dated Sep. 5, 2003; (5 pages).
UK Combined Search and Examination Report dated Sep. 19, 2003; (5 pages).
Canadian Official Action dated Dec. 8, 2005, Application No. 2,425,802, Smith International, Inc.

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