Cement slurry

Details Cement slurry Cement slurry

1995-09-21

1997-10-21

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524486, 524524, 524563, 524588, 523130, C08L 102, C08L 3104

Patent

active

056797311

ABSTRACT:
A low density, antimigratory cement composition includes cement, water and between about 0.5 to about 2.5 gallons per sack of cement of an additive wherein the additive is a copolymer of an impermeability agent and a gelling agent wherein said impermeability agent is a vinyl acetate-containing material and wherein said gelling agent is a vinyl ester which is compatible with said impermeability agent, whereby said cement composition in slurry form is thixotropic and resistant to gas migration.

REFERENCES:
patent: 3058520 (1962-10-01), Woodard et al.
patent: 3668165 (1972-06-01), Bergmeister et al.
patent: 4434257 (1984-02-01), Narisawa et al.
patent: 4528238 (1985-07-01), Alford
patent: 4537918 (1985-08-01), Parcevaux et al.
patent: 4767460 (1988-08-01), Parcevaux et al.
patent: 5099922 (1992-03-01), Ganguli

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