Drill bit stabilizer
AssigneeRotary Drilling Technology, LLC
InventorsPeter R. Harvey, Michael J. Woods, Steve J. Krase
Life of this patent
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Abstract
A stabilizer for a drill string and drill bit is mounted behind the drill bit in the drilling assembly. The stabilizer comprises a tubular body having one or more stabilizer blades mounted thereon. The stabilizer blades extend radially outwardly from the stabilizer body. In a first position, the stabilizer blades are in vertical axial alignment behind the drill bit. Drill string pressure is utilized to release a locking mechanism permitting relative rotation between the stabilizer blades and the stabilizer body thereby rotating the stabilizer blades to a second position providing stabilization for the drill string and drill bit.
Claims10
A drill bit stabilizer, comprising:
- a) a stabilizer body having an axial passage extending therethrough, said stabilizer body including a pin connector on one end and a box connecter on the other end for connecting said stabilizer body in a drill string;
- b) at least one stabilizer blade mounted about said stabilizer body;
- c) an actuator housing mounted in said axial passage of said stabilizer body;
- d) piston means carried by said housing for coupling said stabilizer blade with said stabilizer body;
- and
- e) conduit means providing fluid communication between said piston means and said axial passage of said stabilizer body.
The apparatus of 4 wherein said brake shoe is pivotally secured in said recess and further including biase means providing an outward force against said brake shoe.
Dependencies are inferred from the claim text.