Process for preventing scale formation in oil wells

Details Process for preventing scale formation in oil wells Process for preventing scale formation in oil wells

1990-10-03

1991-10-29

Suchfield, George A.

Wells

Processes

Material placed in pores of formation to treat resident...

166310, 252 8552, E21B 4312

Patent

active

050607286

ABSTRACT:
Wells producing oil and gas are treated with formation waters containing selected time-release scale inhibitors to reduce the deposit of scale in the wellbore and within the formation. The inhibitors are formed by cross-linking a polyacrylic acid compound of controlled molecular wright from about 1,000 to 10,000 with trivalent chromium cations to produce a water-soluble complex which progressively releases the inhibitor from the formation over an extended period of time.

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patent: 4710303 (1987-12-01), Emmons
patent: 4779679 (1988-10-01), Snavely, Jr. et al.
patent: 4787455 (1988-11-01), Snavely, Jr. et al.
patent: 4947934 (1990-08-01), Hen
Journal of Petroleum Technology, K. O. Meyers; Jun. 1985; 1019-1034.

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