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Well packer

  • US 5,340,626 A
  • Filed: 04/07/1993
  • Issued: 08/23/1994
  • Est. Priority Date: 08/16/1991
  • Status: Expired due to Fees
First Claim
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1. An inflatable packer comprising:

  • a pair of spaced apart end fittings and an expandable elongated annular member extending between the end fittings along a longitudinal axis of the packer, said member comprising;

    at least one annular layer of material having an outer circumference and an inner surface, at least a portion of the material being provided with fibers, andan elastomer encapsulating the fibers of the portion of the material, the member being expanded from a deflated position to an inflated position to form a seal upon building up of pressure in the member bore, at least part of the fibers in the inflated position being oriented along a helix having a helical pitch angle of 54°

    40'"'"' relative to the longitudinal axis and equivalent to a lock up angle.

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