Versatile additives for well cementing applications

Details Versatile additives for well cementing applications Versatile additives for well cementing applications

2011-05-24

2011-05-24

Gulakowski, Randy (Department: 1766)

Wells

Processes

Cementing, plugging or consolidating

C507S207000, C507S273000

Reexamination Certificate

active

07946343

ABSTRACT:
The present invention provides a versatile additive for improving the properties of a cement slurry made with portland cement and to be utilized in well cementing, said versatile additive comprising type of silicates and/or borates that inhibit gelation occurring with the interstitial phase. The additive of the present invention improves significantly the rheology (i.e., strong dispersing effect) and can even overcome severe gelation problems. At temperature above about 88° C. (190° F.) the additive acts as retarder aid, enabling to reduce considerably the concentration of retarder required to achieve a given thickening time.

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