Free cutting gage insert with relief angle

Details Free cutting gage insert with relief angle Free cutting gage insert with relief angle

1993-11-24

1995-04-18

Neuder, William P.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175374, 175431, E21B 936

Patent

active

054070228

ABSTRACT:
A rolling cone drill bit is disclosed having gage inserts which are installed so as to create a relief angle between the outer surface of each insert and the sidewall of the borehole. Each gage insert only engages the sidewall at a leading edge of the outer surface of the insert.

REFERENCES:
patent: 3389761 (1968-06-01), Ott
patent: 3727705 (1973-04-01), Newman
patent: 4140189 (1979-02-01), Garner
patent: 4343372 (1982-08-01), Kinzer
patent: 5027913 (1991-07-01), Nguyen
patent: 5131480 (1992-07-01), Lockstedt et al.
patent: 5145016 (1992-09-01), Estes
Liu et al., An Analysis of Field-Worn TSD Cutting Elements, pp. 23-28 ASME 1992, PED-vol 40, Drilling Technology.
Keshavan et al., Diamond-Enhanced Insert: New Compositions and Shapes pes for Drilling Soft-to-Hard Formations, pp. 577-591, 1993, for Drilling Soft-to-Hard Formations, pp. 577 SEP-IADC Drilling Conference.

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