Process for inhibiting scale formation in subterranean...

Details Process for inhibiting scale formation in subterranean... Process for inhibiting scale formation in subterranean...

E - Fixed Constructions

21

B

E21B 43/12 (2006.01)

Patent

CA 2116965

2116965 9305270 PCTABS00020 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 weight 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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