Well packer
First Claim
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1. An inflatable packer comprising:
- an expandable elongated sleeve extending along a longitudinal axis, said sleeve being formed with at least one circumferentially expandable portion formed with;
at least one annular first layer of an elastomeric resin having outer and inner circumferences, andtwo barrier annular layers coaxial with the first layer, each of the barrier layers lying against a respective one of the inner and outer circumferences of the first layer, said barrier layers being of material relatively inert to the corrosive fluids present in a well and selected from the group consisting of metals, fluoroplastics and polyphenylene sulphide, said sleeve being formed with an inner bore, said portion being expandable from a deflated condition to an inflated condition to form a seal upon building up of pressure in the bore, each barrier layer being impermeable and preventing contact between the respective circumference of the first layer and the corrosive fluids present in the well in the inflated condition position of said portion; and
spreading means for enabling each barrier layer to spread from a respective initial configuration upon building up the pressure in the bore, each barrier layer being contractable substantially to the respective initial configuration upon reduction of the pressure in the bore.
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Abstract
An inflatable well packer includes several annular layers of material, consisting of a series of oriented fibers encapsulated in an elastomeric resin, the inner and outer circumferential surfaces of the well packer each carry a protective layer of material effective to protect the elastomeric resin, each protective layer 9, 11 is deposited on the well packer in a folded configuration, such that unfolding of the layers enables inflation of the well packer.
64 Citations
12 Claims
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1. An inflatable packer comprising:
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an expandable elongated sleeve extending along a longitudinal axis, said sleeve being formed with at least one circumferentially expandable portion formed with;
at least one annular first layer of an elastomeric resin having outer and inner circumferences, andtwo barrier annular layers coaxial with the first layer, each of the barrier layers lying against a respective one of the inner and outer circumferences of the first layer, said barrier layers being of material relatively inert to the corrosive fluids present in a well and selected from the group consisting of metals, fluoroplastics and polyphenylene sulphide, said sleeve being formed with an inner bore, said portion being expandable from a deflated condition to an inflated condition to form a seal upon building up of pressure in the bore, each barrier layer being impermeable and preventing contact between the respective circumference of the first layer and the corrosive fluids present in the well in the inflated condition position of said portion; and spreading means for enabling each barrier layer to spread from a respective initial configuration upon building up the pressure in the bore, each barrier layer being contractable substantially to the respective initial configuration upon reduction of the pressure in the bore. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification