Steerable directional drilling tool

Details Steerable directional drilling tool Steerable directional drilling tool

1997-09-23

1999-08-24

Tsay, Frank

Boring or penetrating the earth

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

Sectional guide or shaft having means to lock sections in...

175 75, E21B 708

Patent

active

059413239

ABSTRACT:
A drilling tool for use with a drill string into which drilling fluid is pumped. The tool comprises: a non-rotating housing having stabilizer blades on its outer surface; a rotating mandrel, passing through the housing; extendible blade means for moving the housing relative to a borehole; and a cam mechanism that is carried by at least one of the mandrel and the housing, and that is operated by drill string rotation and the flow of drilling fluid for operating the extendible blade means to move the drill string and steer the drill bit attached hereto.

REFERENCES:
patent: 4394881 (1983-07-01), Shirley
patent: 5181576 (1993-01-01), Askew et al.
patent: 5259467 (1993-11-01), Schoeffler
patent: 5421421 (1995-06-01), Appleton
patent: 5467834 (1995-11-01), Hughes et al.
patent: 5553679 (1996-09-01), Thorp
patent: 5836406 (1998-11-01), Schuh

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