Cement set retarding additives, compositions and methods

Details Cement set retarding additives, compositions and methods Cement set retarding additives, compositions and methods

1993-01-14

1994-08-30

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

106724, E21B 3313

Patent

active

053418816

ABSTRACT:
Cement set retarding additives, set retarded hydraulic cement compositions and methods of using the cement compositions for cementing zones in wells are provided. The set retarding additives are copolymers containing monomer units formed from a first monomer of acrylic acid or methacrylic acid and a second monomer of acrylamide or a derivative of acrylamide.

REFERENCES:
patent: 4500357 (1985-02-01), Brothers et al.
patent: 4555269 (1985-11-01), Rao et al.
patent: 4557763 (1985-12-01), George et al.
patent: 4676317 (1987-06-01), Fry et al.
patent: 4941536 (1990-07-01), Brothers et al.
patent: 5092935 (1992-03-01), Crema et al.

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