High torque pressure sleeve for easily drillable casing exit por

Details High torque pressure sleeve for easily drillable casing exit por High torque pressure sleeve for easily drillable casing exit por

1998-04-24

2000-03-28

Bagnell, David

Wells

Wells with lateral conduits

166 551, 1662421, 1662426, 175 79, E21B 1916

Patent

active

060418559

ABSTRACT:
An apparatus for providing a high torque pressure sleeve for easily drillable casing exit ports. A joint of tubular casing with a pre-formed window in the wall thereof has a tubular sleeve fixedly attached to the exterior of the tubular casing covering the window. The interior surface of the sleeve is sealed to the exterior of the tubular casing on opposite sides of the window. In use, the joint of the tubular casing is run down to the depth of interest in the earth wellbore and the window is oriented with respect to the formation of interest at the depth. The joint of tubular casing is then cemented in place, after which a whipstock is lowered into the wellbore, oriented and anchored therein. The assembly automatimuly fixes the axial and circumferential oriention of the whipstock within a surrounding casing joint and holds the assembly in place. A drilling assembly is lowered into the casing and a lateral bore is drilled off the whipstock through the window and the pressure sleeve and into the surrounding formation.

REFERENCES:
patent: 3811500 (1974-05-01), Morrisett et al.
patent: 4415205 (1983-11-01), Rehm et al.
patent: 5038862 (1991-08-01), Giroux et al.
patent: 5458209 (1995-10-01), Hayes et al.
patent: 5462120 (1995-10-01), Condouin
patent: 5615740 (1997-04-01), Comeau et al.
patent: 5875847 (1999-03-01), Forsyth
Nickle's New Technology Magazine, vol. 5, No. 10, Dec. 1997, pp. 6-8.

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