E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
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E21B 43/22 (2006.01) C09K 8/528 (2006.01) C09K 8/62 (2006.01) C09K 8/74 (2006.01) C09K 8/78 (2006.01) C09K 8/84 (2006.01) E21B 43/27 (2006.01)
Patent
CA 1280885
Abstract of the Disclosure A method and composition for stimulating subterranean formations containing iron deposits. The composition comprises an admixture of (i) at least one member selected from the group consisting of hydroxylamine hydrochloride, hydroxylamine hydro- bromide, hydroxylamine sulfate, hydrazine mono- hydrochloride, hydrazine dihydrochloride, hydrazine sulfate, hydrazine monobromide, hydrazine dibromide, hydrazine monoiodide, hydrazine diiodide and hydroquinone together with (ii) at least one member selected from the group consisting of gluconodelta- lactone, citric acid, salts of citric acid, ethylene- diaminetriacetic acid, salts of ethylenediamine- tetraacetic acid, nitrilotriacetic acid, salts of nitrilotriacetic acid, hydroxyethylethylene- diaminetriacetlc acid, and salts of hydroxyethylethylenediaminetriacetic acid and (iii) a catalytic amount of a solubilized salt of a compound capable of providing cupric, cuprous, nickel, zinc ions or mixtures thereof. The method comprises contacting the subterranean formation in an appropriate manner with the above-described composi- tion present in an amount sufficient to sequester iron. When the treating fluid used in stimulating the subterranean formation is substantially non-acidic, the compounds of group (ii) above, can be omitted from the above described composition and iron still is sequestered.
539297
Dill Walter Ray
Ford William Gerald Francis
Gdanski Ricky David
Walker Michael Lewis
Haliburton Company
Swabey Ogilvy Renault
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