Well cement fluid loss additive and method

Details Well cement fluid loss additive and method Well cement fluid loss additive and method

1990-07-31

1991-04-23

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

106778, 166295, E21B 3314

Patent

active

050092693

ABSTRACT:
A fluid loss additive for addition to a cement slurry used in cementing a casing string in a wellbore. The additive reduces loss of water from the slurry into the formation, resulting in a better cement job. The additive is comprised of partially hydrolyzed polyvinyl acetate polymer, calcium sulfate, a crosslinker for the polymer, and optionally a defoamer.

REFERENCES:
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patent: 3493529 (1970-02-01), Krottinger et al.
patent: 3615794 (1971-10-01), Nimerick
patent: 4011909 (1977-03-01), Adams et al.
patent: 4054461 (1977-10-01), Martin
patent: 4054462 (1977-10-01), Stude
patent: 4137093 (1979-01-01), Poblano
patent: 4569395 (1986-02-01), Carpenter

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