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US 9,284,477 B2Granted
Compositions and methods for maintaining zonal isolation in a subterranean well
AssigneeSchlumberger Technology Corporation
InventorsFatma Daou, Anthony Loiseau, Bernardo Engelke
Life of this patent
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Abstract
Well cementing compositions comprise water, an inorganic cement and flexible particles having an average density higher than 1.5 g/cm3. The flexible particles may be elastomers. The flexible particles and cement particles may be present in a trimodal particle size distribution. The compositions may be placed in subterranean wells in the context of primary or remedial cementing.
Claims20
A well cementing composition, comprising:
- (i) water;
- (ii) inorganic cement particles;
- and
- (iii) flexible particles having an average density higher than 1.5 g/cm3.
1 more element
A method for cementing a subterranean well, comprising:
- (i) preparing a composition comprising water, inorganic cement particles and flexible particles having an average density higher than 1.5 g/cm3;
- (ii) placing the composition into the well.
A method for treating a subterranean well, comprising
- (i) preparing a composition comprising water, inorganic cement particles and flexible particles having an average density higher than 1.5 g/cm3;
- (ii) placing the composition into the well.
Dependencies are inferred from the claim text.