Title:
METHOD AND APPARATUS FOR MILLING A ZERO RADIUS LATERAL WINDOW IN CASING
Document Type and Number:
WIPO Patent Application WO/2012/088102
Kind Code:
A4
Abstract:
A flexible milling assembly for milling an orifice through a well casing. One embodiment includes a drive yoke, and a plurality of straight and split yoke assemblies - all linked together and to a cutter head with universal blocks that enable the components to pivot relative to each other. A string of joint tubing connected to a prime mover on the surface is used to lower the milling assembly into a well and supply the driving torque. A split shoe coupled to a guide tube is positioned within the well casing where the orifice is to be milled. The milling assembly is guided through a curved passage within the split shoe to bring the cutter head into contact with the well casing. A protector assembly can be provided to enclose and protect the milling assembly when it is tripping into and out of the well casing.
Inventors:
BELEW DAVID (US)
KOLLE JACK J (US)
MARVIN MARK H (US)
KOLLE JACK J (US)
MARVIN MARK H (US)
Application Number:
PCT/US2011/066139
Publication Date:
February 21, 2013
Filing Date:
December 20, 2011
Export Citation:
Assignee:
BELEW DAVID (US)
KOLLE JACK J (US)
MARVIN MARK H (US)
KOLLE JACK J (US)
MARVIN MARK H (US)
International Classes:
E21B7/08; E21B10/32; E21B17/00
Attorney, Agent or Firm:
ANDERSON, Ronald, M. et al. (PLLC601 W. Riverside Ave, Suite 140, Spokane WA, US)
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