Expandable casing with enhanced collapse resistance and sealing capabilit

An expansion tube, depth technology, used in casing, drill pipe, wellbore/well components, etc., can solve problems such as difficult sealing

Inactive Publication Date: 2012-01-04
HALLIBURTON ENERGY SERVICES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This situation means that a gap is created between the inner and outer

Method used

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  • Expandable casing with enhanced collapse resistance and sealing capabilit
  • Expandable casing with enhanced collapse resistance and sealing capabilit
  • Expandable casing with enhanced collapse resistance and sealing capabilit

Examples

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Embodiment Construction

[0015] It should be understood that the various embodiments described herein can take various orientations, such as oblique, inverted, horizontal, upright, etc., and can take various configurations without departing from the principles of the present disclosure. The embodiments are described merely as useful examples of applications of the principles of the disclosure, which are not limited to any specific details of these embodiments.

[0016] In the following description of representative embodiments of the disclosure, directional terms, such as "above," "below," "upper," "lower," etc., are used for convenience when referring to the drawings. In general, "above", "upper", "upward" and similar terms refer to the direction along the borehole toward the Earth's surface, while "below", "lower", "downward" and similar terms refer to Along the direction of the borehole away from the Earth's surface.

[0017] figure 1 Representatively illustrated in is a well system 10 embodying ...

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Abstract

An expandable casing with enhanced collapse resistance and sealing capability is disclosed. 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.

Description

technical field [0001] The present disclosure relates generally to equipment used in connection with subterranean wells and operations performed in connection with subterranean wells, and in embodiments described herein, more particularly provides expandable casing having enhanced crush strength and sealing properties (expandable casing). Background technique [0002] It is now common practice to expand the casing downhole. However, a major problem with current expandable sleeves is that their crush strength after expansion is usually much less than desired. One reason for this low crush strength is that the casing must have a relatively thin wall thickness due to expansion force and pressure limitations of the expansion tool used to expand the casing. [0003] Another problem with current expandable sleeves is that after one sleeve expands within the other, the inner sleeve will spring back radially more than the outer sleeve due to the force applied to the inner sleeve d...

Claims

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Application Information

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IPC IPC(8): E21B43/10E21B17/00
CPCE21B43/103
Inventor 布罗克·W·华生
Owner HALLIBURTON ENERGY SERVICES INC
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