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US 8,573,314 B2Granted
Packer system with reduced friction during actuation
AssigneeSchlumberger Technology Corporation
InventorsPierre-Yves Corre, Jean-Louis Pessin
Life of this patent
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Abstract
A technique involves a packer formed as an expandable packer with an internal expandable bladder. A mechanical structure is deployed around the expandable bladder, and an anti-extrusion layer is located between the internal, expandable bladder and the mechanical structure. A separate protective layer is positioned between the internal, expandable bladder and the mechanical structure to reduce friction.
Claims12
A packer structure comprising:
- an inner bladder expandable in a radial direction by inflation;
- a mechanical layer at least partially surrounding the inner bladder;
- an anti-extrusion layer positioned between the mechanical layer and the inner bladder, the anti-extrusion layer having a reinforcement structure to prevent extrusion of the inner bladder through mechanical layer;
- a protection layer positioned between the anti-extrusion layer and the mechanical layer, the protection layer expandable with the inner bladder while minimizing friction between the anti-extrusion layer and the mechanical layer and improving sliding movement of the anti-extrusion layer with respect to the mechanical layer.
1 more element
A system, comprising:
- an inflatable bladder;
- a mechanical layer surrounding the inflatable bladder;
- an anti-extrusion layer positioned between the inflatable bladder and the mechanical layer;
- and
- a protective sheet formed of an expandable material and deployed between the inflatable bladder and the mechanical layer to reduce friction with the anti-extrusion layer below a friction that would exist without the protective sheet and increase sliding movement of the mechanical layer with respect to the anti-extrusion layer which occurs without the protective sheet.
2 more elements
Dependencies are inferred from the claim text.