Slag-based well cementing compositions and methods

Details Slag-based well cementing compositions and methods Slag-based well cementing compositions and methods

1994-03-30

1995-06-06

Novosad, Stephen J.

Wells

Processes

Cementing, plugging or consolidating

166293, 106789, E21B 3314, C04B 714, C04B 7147, C04B 7153

Patent

active

054214092

ABSTRACT:
By the addition of wollastonite to slag based cements, such as those formed when converting drilling fluids to cementitious materials in oil and gas well applications, the flexural strength of the cementitious material is improved. The method involves forming a pumpable slurry of drilling fluid, blast furnace slag and the fibrous mineral, wollastonite. The slurry is then activated by the addition of such activators as sodium hydroxide and soda ash and is pumped into the well bore to a desired location and is allowed to solidify.

REFERENCES:
patent: 4132555 (1979-01-01), Barrable
patent: 4968349 (1990-11-01), Virtanen
patent: 5058679 (1991-10-01), Hale et al.
patent: 5106423 (1992-04-01), Clarke
patent: 5125455 (1992-06-01), Harris et al.
patent: 5183506 (1993-02-01), Zhang

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