Method and composition for zonal isolation of a well
AssigneeSchlumberger Technology Corporation
InventorsLoic Regnault De La Mothe, Sylvaine Le Roy-Delage
Life of this patent
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Abstract
The invention provides a system comprising: a tubular containing a first surface comprising a coating made of a first swellable material coating said first surface, wherein said coating has a second surface and said first swellable material is able to swell in contact with a first fluid on said second surface; and a composition made of a settable material and a second swellable material able to swell in contact with a second fluid. The invention also discloses the method associated with the use of such a system.
Claims24
A sealing system comprising:
- (i) a tubular having a first surface comprising a coating made of a first swellable material coating said first surface, wherein said coating forms second surface;
- said first swellable material being able to swell in contact with a first fluid on said second surface;
- and
- (ii) a composition made of a settable material and a second swellable material able to swell in contact with said first fluid and/or with a second fluid
- characterized in that the second surface is coated by a protective coating which is able to prevent and/or delay contact between the first swellable material and the first fluid.
(canceled)
(canceled)
A method to consolidate a subterranean formation in a well, comprising the steps of:
- lowering in the well, a tubular having a first surface comprising a coating made of a first swellable material coating said first surface, wherein the coating forms second surface;
- and said first swellable material is able to swell in contact with a first fluid on said second surface;
- placing a settable material and a second swellable material able to swell in contact with said first fluid and/or a second fluid, wherein said settable material and said second swellable material are placed in the vicinity of the second surface;
- allowing the settable material to set;
- allowing the first swellable material to swell in contact with the first fluid characterized in that the second surface is coated by a protective coating which is able to prevent and/or delay contact between the first swellable material and the first fluid.
(canceled)
Dependencies are inferred from the claim text.