Storable water-microsphere suspensions for use in well cements and methods
AssigneeHalliburton Energy Services, Inc.
InventorsJan Pieter Vijn, Bach Dao
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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.
Claims20
A storable water-microsphere suspension consisting essentially of:
- water;
- microspheres selected from the group consisting of fly ash, glass microspheres, recycled glass microspheres and synthetic hollow glass microspheres;
- and
- an effective amount of a suspending agent selected from the group consisting of microfine or colloidal materials and gel forming polymers;
- wherein said storable suspension does not separate for at least three weeks.
A storable water-microsphere suspension for use in well cement compositions consisting essentially of:
- water;
- microspheres selected from the group consisting of fly ash microspheres, glass microspheres and recycled glass microspheres;
- 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;
- wherein said storable suspension does not separate for at least three weeks.
A storable water-microsphere suspension for use in well cement compositions consisting essentially of:
- water;
- microspheres selected from the group consisting of fly ash microspheres, glass microspheres and recycled glass microspheres;
- and
- a polymer suspending agent selected from the group consisting of carragenan, scleroglycan, xanthan, guar, hydroxypropylguar, hydroxyethylcellulose, carboxymethylhydroxy-ethylcellulose and a copolymer or terpolymer of acrylamidemethyl propylene sulfonate, N,N-dimethylacrylamide and acrylic acid;
- wherein said storable suspension does not separate for at least three weeks.
Dependencies are inferred from the claim text.