Slip-deployed anti-extrusion backup ring
AssigneeBaker Hughes Incorporated
InventorsDavid S. Bishop, Douglas J. Lehr
Life of this patent
Estimating the term…
Abstract
Arrangements and packer devices having anti-extrusion backup rings that are expanded radially outwardly by a setting mechanism that lies proximate the elastomeric packer element that is being protected against extrusion. The setting mechanism can be a slip assembly that has a radially expandable slip element.
Claims9
An arrangement for preventing axial extrusion of a compression-set packer element of a packer device set within a surrounding tubular, the arrangement comprising:
- an anti-extrusion backup ring radially surrounding a central mandrel and located proximate the packer element;
- a setting mechanism for energizing the backup ring to prevent axial extrusion of the packer element within the surrounding tubular, the setting mechanism including a slip element that is radially expandable to create an anchoring engagement with a surrounding tubular, and wherein the anti-extrusion backup ring has an exterior portion that overlies a portion of the slip element;
- and
- wherein radial expansion of the slip element contacts the exterior portion and urges the exterior portion into contact with the surrounding tubular.
A packer device that is to be set within a surrounding tubular, the packer device comprising:
- a central mandrel;
- a compression-set packer element radially surrounding the mandrel;
- an anti-extrusion backup ring radially surrounding the mandrel and located adjacent the packer element;
- and
- a setting mechanism for energizing the backup ring to prevent axial extrusion of the packer element within the surrounding tubular, the setting mechanism including a slip element that is radially expandable to create an anchoring engagement with a surrounding tubular, and wherein the anti-extrusion backup ring has an exterior portion that overlies a portion of the slip element;
- and
- wherein radial expansion of the slip element contacts the exterior portion and urges the exterior portion into contact with the surrounding tubular.
A method of establishing an anti-extrusion backup seal for a packer element in a packer device to be set within a surrounding tubular, the method comprising the steps of:
- radially surrounding a central mandrel with the packer element;
- placing an anti-extrusion backup ring proximate an end wall of the packer element;
- locating a setting mechanism proximate the backup ring, the setting mechanism including a slip element that is radially expandable to create an anchoring engagement with a surrounding tubular, the anti-extrusion backup ring haying an exterior portion that overlies a portion of the slip element;
- and
- radially expanding the slip element to contact the exterior portion and urge the exterior portion into contact with the surrounding tubular.
Dependencies are inferred from the claim text.