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US 8,474,524 B2Granted
Anti-extrusion packer system
AssigneeSchlumberger Technology Corporation
InventorsPierre-Yves Corre, Gilles Carree
Life of this patent
Estimating the term…
Abstract
A technique enables control over anti-extrusion layer movement during packer inflation. A packer employs a packer nipple having an exterior which uniquely engages distinct layers of the packer. The exterior comprises a plurality of distinct retention features, and each retention feature is designed to engage a specific layer of the packer. An individual retention feature can be uniquely designed to secure an anti-extrusion layer.
Claims20
A system for use in a wellbore, comprising:
- as packer comprising:
- an inner bladder layer;
- an anti-extrusion layer radially outward of the inner bladder layer, the anti-extrusion layer having an axial dimension that exceeds an axial dimension of the inner bladder layer;
- a mechanical layer radially outward of the anti-extrusion layer;
- and
- a mechanical extremity haying an inner nipple positioned radially inwardly of the inner bladder layer that cooperates with a crimped skirt portion and an outer skirt portion, the outer skirt portion positioned radially outward from the crimped skirt portion, wherein the nipple and the crimped skirt portion cooperate to individually grip the mechanical layer, the anti-extrusion layer and the inner bladder at distinct gripping regions.
3 more elements
A downhole packer assembly comprising:
- an expandable structure including at least an inner bladder layer, an anti-extrusion layer deployed radially outward from the inner bladder layer, and a mechanical layer deployed radially outward from the anti-extrusion layer;
- a first mechanical extremity supporting a first axial end of the expandable structure, the first mechanical extremity including a first inner nipple having a multi-level profile configured to individually grip a first axial end of each of the inner bladder layer, the anti-extrusion layer, and the mechanical laver;
- a second mechanical extremity supporting a second opposing axial end of the expandable structure, the second mechanical extremity including a second inner nipple having a multi-level profile configured to individually grip a second opposing axial end of each of the inner bladder layer, the anti-extrusion layer, and the mechanical layer;
- and
- wherein each of the inner bladder layer, the anti-extrusion layer, and the mechanical layer extend axially from the first mechanical extremity to the second mechanical extremity the first mechanical extremity further comprises a first crimped skirt deployed radially outward from the first inner nipple and configured to engage a corresponding crimped region on the first axial end of the mechanical layer;
- and
- the second mechanical extremity further comprises a second crimped skirt deployed radially outward from the second inner nipple and configured to engage a corresponding crimped region on the second axial end of the mechanical layer.
4 more elements
Dependencies are inferred from the claim text.