Composition for controlling the set time of cement

Details Composition for controlling the set time of cement Composition for controlling the set time of cement

1996-02-13

1997-08-19

Green, Anthony

Compositions: coating or plastic

Materials or ingredients

Additive materials for inorganic cements which contain a...

106673, 106717, 106724, 106725, 106730, 106734, 106802, 106805, 106809, 106815, 106819, C04B 2200, C04B 2400

Patent

active

056583800

ABSTRACT:
An oil and gas well cementing composition and method are shown utilizing hydraulic cement, water a cement hydration retarder and an additive which is effective over a selected time period degrade the retarder. The additive is a controlled release oxidizer which releases nascent oxygen over time to gradually oxidize the cement hydration retarder, thereby providing a single cement slurry design for cementing pipes for oil and gas wells where wide temperature differentials exist between the two ends of the pipe.

REFERENCES:
patent: 2919997 (1960-01-01), Zehrlaut
patent: 4204875 (1980-05-01), Szalavitz
patent: 4450010 (1984-05-01), Burkhalter et al.
patent: 4455171 (1984-06-01), Spensley et al.
patent: 5336316 (1994-08-01), Dawson et al.

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