Expandable casing with enhanced collapse resistance and sealing capability
AssigneeHalliburton Energy Services, Inc.
InventorBrock W. Watson
Life of this patent
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Abstract
An expandable casing with enhanced collapse resistance and sealing capability. An expandable tubular for use in a subterranean well includes multiple recesses extending into a wall of the tubular, with the recesses being longitudinally spaced apart along the wall. A method of expanding tubulars in a subterranean well includes the steps of: expanding a tubular in the well, the tubular including multiple recesses extending into a wall of the tubular; and after the expanding step, allowing the wall of the tubular to retract radially inward more at each of the recesses than between the recesses.
Claims20
An expandable tubular for use in a subterranean well, the expandable tubular comprising:
- multiple recesses extending into a wall of the tubular, and the recesses being longitudinally spaced apart along the wall, wherein an inner diameter of the tubular at each recess is less than an inner diameter of the tubular between the recesses.
A method of expanding tubulars in a subterranean well, the method comprising the steps of:
- expanding a first tubular in the well, the first tubular including multiple recesses extending into a wall of the first tubular;
- and
- after the expanding step, allowing the wall of the first tubular to retract radially inward more at each of the recesses than between the recesses.
Dependencies are inferred from the claim text.