Using pipe shrinkage upon expansion to actuate a downhole tool

Details Using pipe shrinkage upon expansion to actuate a downhole tool Using pipe shrinkage upon expansion to actuate a downhole tool

2005-05-27

2008-10-07

Bomar, Shane (Department: 3676)

Wells

Packers or plugs

With expanding anchor

C166S196000, C166S206000, C166S207000

Reexamination Certificate

active

07431078

ABSTRACT:
A downhole tool with a mandrel that is expanded downhole is further actuated due to relative longitudinal movement between the mandrel and a member that accommodates radial expansion without undergoing as much shrinkage as the expanded mandrel or any shrinkage at all. In a packer application, the packer can be set in open hole or cased hole and the relative longitudinal movement that results from mandrel expansion leaves a residual longitudinal compressive force on the sealing element and a tensile reaction force on the underlying mandrel.

REFERENCES:
patent: 4842082 (1989-06-01), Springer
patent: 6325148 (2001-12-01), Trahan et al.
patent: 6799635 (2004-10-01), Schultz et al.
patent: 6854522 (2005-02-01), Brezinski et al.
patent: 2003/0116328 (2003-06-01), Doane et al.
patent: 2004/0256115 (2004-12-01), Vincent et al.
patent: 2006/0266514 (2006-11-01), Abarca et al.

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