Stabilizer for navigational drilling

Details Stabilizer for navigational drilling Stabilizer for navigational drilling

1986-07-03

1988-03-08

Novosad, Stephen J.

Boring or penetrating the earth

Means traveling with tool to constrain tool to bore along...

Axially spaced opposed bore wall engaging guides

175325, E21B 708

Patent

active

047294388

ABSTRACT:
A stabilizer for use in controlled directional drilling includes a plurality of spaced and axially extending blade elements each having a blade surface face of hardened material. The blade surface face includes a tapered lead portion and a tapered trailing portion with a flat non-tapered surface face portion therebetween. Each blade surface includes an edge portion in which the leading edge is radiused. Thus constructed, the stabilizer reduces kerfing into the formation and hang-up and change of tool face orientation during navigational drilling. Eccentric stabilizers are also described.

REFERENCES:
patent: 2919897 (1960-01-01), Sims
patent: 3145785 (1964-08-01), Kellner
patent: 3420323 (1969-01-01), Owens
patent: 4396234 (1983-08-01), Garrett
patent: 4526241 (1985-07-01), Anders
patent: 4610316 (1986-09-01), Boaz

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