E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/28
E21B 17/16 (2006.01) E21B 10/32 (2006.01) E21B 17/10 (2006.01)
Patent
CA 1299559
ABSTRACT OF THE DISCLOSURE A stabilizer for deep well drilling tools. The stabilizer comprises a tubular outer casing insertable into a drilling shaft and defining a plurality of slit openings distributed around its periphery; a tubular adjusting mandrel supported in the casing in axially movable relation with the casing in response to well fluid pressure applied to the well; a separate elongated ribbed body movably fitted in each slit opening, said ribbed body having a rear wedge face facing opposite to said relative motion of said mandrel. The mandrel has a separate mating wedge face for the rear wedge of each said ribbed body. Each ribbed body is capable of outward movement in its respective slit opening in response to contact between said mating wedges upon said axial movement of said mandrel relative to said casing responsive to said fluid pressure. Each ribbed body and its respective slit opening is configured to define gaps between the longitudinal sides thereof. The stabilizer also comprises an axially projecting guide projection at each end of said ribbed body terminating in a reduced dimension at its end and having parallel side guide faces; and, a separate securing piece for each guide projection adapted to be inserted through a slit from outside the casing and configured to reach over its respective guide projection and to fit between its guide projection and the casing to hold its guide projection in the casing.
563737
Ostertag Alfred
Schillinger Hans
Eastman Christensen Company
Marks & Clerk
Ostertag Alfred
Schillinger Hans
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