Well packer
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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Abstract
An inflatable well packer includes several annular layers of material, consisting of a series of oriented fibers encapsulated in a resin, the fibers being oriented in directions relative to the direction of the circumference of the annular layers such that pressure from the bore through the annular layers causes changes to the orientations of the fibers, thus causing inflation of the well packer, the fibers within each layer being oriented along the length of the layer, so that a portion of them are oriented at the lock up angle.
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Citations
9 Claims
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1. An inflatable packer comprising:
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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, and an 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification