SWELLABLE ENERGIZERS FOR OIL AND GAS WELLS
First Claim
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1. A seal stack, comprising:
- a sealing element including an annular seal ring having a diameter and an axis defined therethrough perpendicular to said diameter, a groove defined in said seal ring, wherein said groove has an opening at a first end of said seal ring, and a swellable energizer disposed in said groove, wherein said swellable energizer swells upon exposure to a solvent causing said seal ring to expand; and
a first annular back-up and a second annular back-up provided at opposing ends of said sealing element, wherein said first back-up includes an interior surface that receives a second end of said sealing element.
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Abstract
A seal stack including a sealing element including an annular seal ring having a diameter and an axis defined therethrough perpendicular to the diameter, a groove defined in the seal ring, wherein the groove has an opening at a first end of the seal ring, and a swellable energizer disposed in the groove, wherein the swellable energizer swells upon exposure to a solvent causing the seal ring to expand. The seal stack also includes a first annular back-up and a second annular back-up provided at opposing ends of the sealing element, wherein said first back-up includes an interior surface that receives a second end of the sealing element.
24 Citations
20 Claims
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1. A seal stack, comprising:
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a sealing element including an annular seal ring having a diameter and an axis defined therethrough perpendicular to said diameter, a groove defined in said seal ring, wherein said groove has an opening at a first end of said seal ring, and a swellable energizer disposed in said groove, wherein said swellable energizer swells upon exposure to a solvent causing said seal ring to expand; and a first annular back-up and a second annular back-up provided at opposing ends of said sealing element, wherein said first back-up includes an interior surface that receives a second end of said sealing element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A cup seal sub-assembly, comprising:
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a carriage including an interior surface and an exterior surface, a leg portion forming a portion of the inner diameter of said carriage, and a body portion; a finger extending from said body portion of said carriage; a cup seal positioned between said leg portion of said carriage and said finger, wherein said cup seal includes a sealing projection and at least a portion of an external surface of said sealing projection contacts an internal surface of said finger; and a swellable energizer positioned between said leg portion of said carriage and said cup seal, wherein upon swelling said swellable energizer extends said sealing projection and finger outward from said carriage. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification