Boring or penetrating the earth – Bit or bit element – Nonsymmetrical bit
Patent
1994-02-15
1999-02-23
Dang, Hoang C.
Boring or penetrating the earth
Bit or bit element
Nonsymmetrical bit
175408, 175426, E21B 1046
Patent
active
058734228
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.
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Cerkovnik Jerry
Hansen Wayne R.
Pastusek Paul E.
Baker Hughes Incorporated
Dang Hoang C.
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