Set retarding additives, cement compositions and methods

Details Set retarding additives, cement compositions and methods Set retarding additives, cement compositions and methods

1992-12-30

1993-11-23

Michl, Paul R.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524 5, 523130, 525 542, 525 543, C08K 300, C09K 700

Patent

active

052644707

ABSTRACT:
The present invention provides set retarding additives, set retarded hydraulic cement compositions including such additives and methods of using the cement compositions for cementing zones in wells. The set retarding additives are graft polymers comprised of a backbone sugar having one or more pendant polymerized or copolymerized vinyl compounds grafted thereto.

REFERENCES:
patent: 4676317 (1987-06-01), Fry et al.
patent: 4703801 (1987-11-01), Fry et al.
patent: 4941536 (1990-07-01), Brothers et al.

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