Anti-whirl drill bit

Details Anti-whirl drill bit Anti-whirl drill bit

1998-12-16

1999-11-09

Dang, Hoang

Boring or penetrating the earth

Bit or bit element

Nonsymmetrical bit

175408, 175426, E21B 1046

Patent

active

059795760

ABSTRACT:
An anti-whirl rotary drag bit including one or more cutters, wear knots or other support structures disposed on the flank of a bit profile in a normally cutter-devoid region of the profile adjacent the gage of the bit in the circumferential segment of the gage used as a bearing zone for the bit to ride against the side of the bore hole. Such flank cutters or other structures reduce wear of the bearing zone but, due to their placement, do not come into play except under certain drilling situations such as reaming or high rates of penetration wherein whirl tendencies resulting from cutting forces are not as pronounced.

REFERENCES:
patent: 4815342 (1989-03-01), Brett et al.
patent: 4932484 (1990-06-01), Warren et al.
patent: 4982802 (1991-01-01), Warren et al.
patent: 5010789 (1991-04-01), Brett et al.
patent: 5042596 (1991-08-01), Brett et al.
patent: 5090492 (1992-02-01), Keith
patent: 5099934 (1992-03-01), Barr
patent: 5109935 (1992-05-01), Hawke
patent: 5119892 (1992-06-01), Clegg et al.
patent: 5165494 (1992-11-01), Barr
patent: 5178222 (1993-01-01), Jones et al.
patent: 5186268 (1993-02-01), Clegg

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