Method of reducing fluid loss in cement compositions which may c

Details Method of reducing fluid loss in cement compositions which may c Method of reducing fluid loss in cement compositions which may c

1987-04-24

1987-11-03

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

160 90, 523130, C04B 2400, E21B 3314

Patent

active

047038012

ABSTRACT:
Cementing compositions having improved fluid loss capabilities for use in oil, gas, water and other well cementing operations are disclosed. Such compositions are comprised of water, hydraulic cement and a fluid-loss additive comprising a graft polymer comprised of a backbone of lignin, lignite, derivatized cellulose and various synthetic polymers selected from the group consisting of polyvinyl alcohol, polyethylene oxide, polypropylene oxide and polyethyleneimine. The grafted pendant groups comprise at least one member selected from the group of homopolymers, copolymers and terpolymers of 2-acrylamido-2-methylpropanesulfonic acid, acrylonitrile, N,N-dimethylacrylamide, acrylic acid, N,N-dialkylaminoethylmethacrylate and their salts. The backbone comprises from about 5 to about 95 percent by weight of the graft polymer, and the pendant groups can comprise from about 5 to about 95 percent by weight of the graft polymer.

REFERENCES:
patent: Re31127 (1983-01-01), Childs et al.
patent: 2646360 (1953-07-01), Lea
patent: 2674321 (1954-04-01), Cutforth
patent: 3234154 (1966-02-01), Martin
patent: 3352902 (1967-11-01), Moschopedis
patent: 3475515 (1969-10-01), Blatz et al.
patent: 3491049 (1970-01-01), Gibson et al.
patent: 3511314 (1970-05-01), Scott, Jr. et al.
patent: 3959004 (1976-05-01), Stryker
patent: 4015991 (1977-04-01), Persinski et al.
patent: 4181533 (1980-01-01), Wilson
patent: 4413681 (1983-11-01), McKensie
patent: 4501672 (1985-02-01), Connell et al.
patent: 4640942 (1987-02-01), Brothers
patent: 4657948 (1987-04-01), Roark et al.

Affiliated with

Also associated with

Rating

Method of reducing fluid loss in cement compositions which may c does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of reducing fluid loss in cement compositions which may c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of reducing fluid loss in cement compositions which may c will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1670064