In-situ creation of drilling deflector

Details In-situ creation of drilling deflector In-situ creation of drilling deflector

2005-12-14

2008-11-25

Bates, Zakiya W. (Department: 3676)

Wells

Processes

Perforating, weakening, bending or separating pipe at an...

C166S055000, C166S117600, C166S384000

Reexamination Certificate

active

07455110

ABSTRACT:
A lateral exit in a casing is formed by starting with a shaped charge to produce a semi-circular cut of about 180 degrees in the casing. A spreader tool pushes in opposed directions at opposed ends of the cut making some of the casing wall at the cut curl inwardly. A wedge shaped tool is advanced behind the curled metal to force it to collapse on itself to create a long tapered ramp that act as would a whipstock. A one trip operation is contemplated. The drill is then guided by the doubled and tapered casing wall right into the formation without having to mill a window in the casing wall.

REFERENCES:
patent: 5636692 (1997-06-01), Haugen
patent: 6012526 (2000-01-01), Jennings et al.
patent: 6209644 (2001-04-01), Brunet
patent: 6488090 (2002-12-01), Ohmer
patent: 2004/0011529 (2004-01-01), McGarian et al.

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