Cementing oil and gas wells

Details Cementing oil and gas wells Cementing oil and gas wells

E - Fixed Constructions

21

B

E21B 33/14 (2006.01) C04B 7/02 (2006.01) C04B 22/00 (2006.01) C04B 24/20 (2006.01) C04B 28/14 (2006.01) C09K 8/46 (2006.01)

Patent

CA 2047485

A cement method and composition for cementing a well penetrating subterranean formations and aqueous based drilling fluid containing at least one cement retarder characterized by a major proportion of the drilling fluid from the well as it was drilled; water; a lesser proportion of dry cementitious material; a minor amount of a dispersant that does not affect satisfactory set cement within an acceptable time interval; and an accelerator selected from the class consisting of acetic acid; the first 4 carbon esters thereof: acetamide; monoethanolamine; and diethanolamine. The first 4 carbon esters are the methyl; ethyl; propyl, both normal and isopropyl; and butyl ester, normal, isobutyl and tertiary butyl.

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