Wells – Packers or plugs – With expanding anchor
Reexamination Certificate
2002-04-05
2010-02-16
Dang, Hoang (Department: 3672)
Wells
Packers or plugs
With expanding anchor
C166S187000, C166S207000, C166S212000
Reexamination Certificate
active
07661470
ABSTRACT:
An expandable packer or anchor is disclosed. It features a gripping device integral to or mounted in a sleeve over the mandrel. Upon expansion, a sealing element engages an outer tubular and the gripping device, such as wickers on slips, preferably digs into the outer tubular. The expansion is preferably by pressure and can incorporate pressure intensifiers delivered by slick line or wire line. Release is accomplished by a release tool, which is delivered on slick line or wire line. It stretches the anchor or packer longitudinally, getting it to retract radially, for release. The release tool can be combined with packers or anchors that have a thin walled feature in the mandrel, to release by pulling the mandrel apart.
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Cocks, G.; “Experimental Results of Work on Expanded Metal Packers from Jun. 1980 to Mar. 1982,” LANL Memorandum ESS-4-89-88 (Apr. 21, 1989).
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Brochure from Owens Tools website, “X-Span Systems”, CoreLab Downhole Solutions, Dec. 18, 2001, 6 pages.
Dreesen, D.S., SPE 22858, “Analytical and Experimental Evaluation of Expanded Metal Packers for Well Completion Service”, Oct. 6, 1991, pp. 413-421.
Baugh John Lindley
Doane James C.
Harper Jason M.
Baker Hughes Incorporated
Dang Hoang
Rosenblatt Steve
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