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Swelling delay cover for a packer

  • US 7,681,653 B2
  • Filed: 08/04/2008
  • Issued: 03/23/2010
  • Est. Priority Date: 08/04/2008
  • Status: Active Grant
First Claim
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1. A downhole swelling packer, comprising:

  • a mandrel supporting a swelling element;

    a film cover over said swelling element to delay swelling of said swelling element as it is run downhole;

    a resin and hardener combination layer mounted to said swelling element, either below or outside of said film cover;

    said combination layer degrades at a different temperature than said film cover;

    said film cover and combination layer are undermined by well fluids to allow well fluid to reach the swelling element to make said swelling element swell to seal downhole without applied longitudinal compression or longitudinal restraint.

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