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US 6,644,405 B2Granted
Storable water-microsphere suspensions for use in well cements and methods
AssigneeHalliburton Energy Services, Inc.
InventorsJan Pieter Vijn, Bach Dao
Life of this patent
Estimating the term…
Abstract
Storable water-microsphere suspensions for use in well cements and methods of cementing well bores are provided. The storable water-microsphere suspensions are basically comprised of water, microspheres and an effective amount of a suspending agent selected from the group consisting of microfine or colloidal materials and gel forming polymers.
Claims15
A method of cementing a well bore comprising the steps of:
- (a) storing a water-microsphere suspension for reducing the density of a well cement composition comprised of water, microspheres and an effective amount of a suspending agent selected from the group consisting of microfine or colloidal materials and gel forming polymers;
- (b) combining said water-microsphere suspension with a cement composition comprised of cement and water;
- (c) introducing said cement composition including said water-microsphere suspension into said well bore;
- and
- (d) allowing said cement composition to set.
2 more elements
A method of cementing a well bore comprising the steps of:
- (a) storing a water-microsphere suspension for reducing the density of a well cement composition comprised of water, microspheres selected from the group consisting of fly ash microspheres, glass microspheres and recycled glass microspheres present in said suspension in an amount in the range of from about 25% to about 150% by weight of water therein and a microfine or colloidal suspending agent selected from the group consisting of carbon black, lignite, brown coal, humic acid, fumed silica, precipitated silica, polyvinyl alcohol latex, styrene-butadiene latex and surfactant micelle present in said dispersion in an amount in the range of from about 25% to about 75% by weight of water therein;
- (b) combining said water-microsphere suspension with a cement composition comprised of cement and water;
- (c) introducing said cement composition including said water-microsphere suspension into said well bore;
- and
- (d) allowing said cement composition to set.
2 more elements
A method of cementing a well bore comprising the steps of:
- (a) storing a water-microsphere suspension for reducing the density of a well cement composition comprised of water, microspheres selected from the group consisting of fly ash microspheres, glass microspheres and recycled glass microspheres present in said suspension in an amount in the range of from about 25% to about 150% by weight of water therein and a polymer suspending agent selected from the group consisting of carragenan, scleroglycan, xanthan, guar, hydroxypropylguar, hydroxyethylcellulose, carboxymethylhydroxyethylcellulose and a copolymer or terpolymer of acrylamidemethyl propylene sulfonate, N,N-dimethylacrylamide and acrylic acid present in said suspension in an amount in the range of from about 0.1% to about 1.5% by weight of water therein;
- (b) combining said water-microsphere suspension with a cement composition comprised of cement and water;
- (c) introducing said cement composition including said water-microsphere suspension into said well bore;
- and
- (d) allowing said cement composition to set.
2 more elements
Dependencies are inferred from the claim text.