Stabilizer for drillstems

Details Stabilizer for drillstems Stabilizer for drillstems

1985-09-23

1987-05-12

Novosad, Stephen J.

Boring or penetrating the earth

With tool shaft detail

Shaft carried guide or protector

E21B 1710

Patent

active

046642064

ABSTRACT:
An improved stabilizer for use in stabilizing both drill collars and other sections on a drill string is disclosed. The stabilizer has at least three circumferentially spaced helical blades which have a tapered portion at each end and a cylindrical portion therebetween, each blade overlapping the adjacent blade within each tapered portion as well as within the cylindrical portion.

REFERENCES:
patent: 4275935 (1981-06-01), Thompson et al.
patent: 4438822 (1984-03-01), Russell
patent: 4456080 (1984-06-01), Holbert
patent: 4465146 (1984-08-01), Fitch
patent: 4465222 (1984-08-01), Hester
N. L. Hycalog, Integral Blade Stabilizers, May 1, 1979.
Drilco, Drilco Stabilizers, May 1, 1979.

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