Wells – Expansible anchor or casing – With wedge or cam and friction drag
Reexamination Certificate
2007-02-02
2008-11-11
Thompson, Kenneth (Department: 3672)
Wells
Expansible anchor or casing
With wedge or cam and friction drag
C166S117600, C166S217000, C175S061000, C175S081000
Reexamination Certificate
active
07448446
ABSTRACT:
A downhole assembly comprises a whipstock and an expandable anchoring tool connected to the whipstock, wherein the tool comprises a body including a plurality of angled channels formed into a wall thereof and a plurality of moveable slips, wherein the slips translate along the angled channels between a collapsed position and an expanded position. A method for performing a thru tubing operation in a well bore comprises running a downhole assembly comprising a whipstock and an expandable anchoring tool in a collapsed position through a first diameter section of the well bore, orienting the whipstock, and translating a plurality of pairs of slips of the expandable anchoring tool to an expanded position into gripping engagement with a casing lining a second diameter section of the well bore that is larger than the first diameter section, wherein the pairs of slips are axially spaced apart along the expandable anchoring tool.
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USPTO Office Action Dated Aug. 27, 2007 for U.S. Appl. No. 11/069,282.
Campbell John E.
Dewey Charles H.
Evans Chad D.
Conley & Rose, P.C.
Smith International Inc.
Thompson Kenneth
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