DOWNWELL SYSTEM WITH DIFFERENTIALLY SWELLABLE PACKER
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United States of America Patent
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Issued Date -
Aug 20, 2009
app pub date -
Feb 6, 2009
filing date -
Feb 15, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A packer assembly comprises a tubular member and a packer system that circumferentially overlies the tubular member. The packer system includes end portions and a central portion disposed between the end portions. The central portion and the end portions are formed of material that swells when contacted with a swelling fluid. The central and end portions are constructed to swell upon contact with the swelling fluid so that the central portion swells to a diameter defined by a wall of the wellbore more rapidly than the end portions. In such a configuration, the central portion of the packer system can be fully swollen prior to the full swelling of the end portions.
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