Method and composition for sealing passages

Details Method and composition for sealing passages Method and composition for sealing passages

C - Chemistry, Metallurgy

09

K

C09K 17/18 (2006.01) C08L 7/02 (2006.01) C08L 21/02 (2006.01) E02D 31/04 (2006.01) E02D 31/12 (2006.01)

Patent

CA 2752352

A method of sealing a passage in a body with a sealing composition comprising (a) a major proportion of a latex emulsion or colloid; and (b) a minor proportion of lauric acid or a laurate compound; and (c) at least one further selected additive, ideally a latex coagulation inhibitor, wherein said composition is pumped into said passage where it is set or coagulated to form a seal. Advantageously, the laurate compound is ammonium laurate and coagulation is conveniently induced by adjusting pH of the sealing composition from alkaline to acidic pH range. The method is particularly well suited to sealing in faulty formations or sealing sites and may be used in sealing within salt mines which contain brines.

Linvention concerne un procédé destiné à étanchéifier un passage dun corps avec une composition détanchéité renfermant (a) une grande proportion démulsion de latex ou de colloïde ; et (b) une petite proportion dacide laurique ou dun composé de laurate ; et (c) au moins un autre additif choisi, idéalement un inhibiteur de la coagulation du latex, ladite composition étant pompée dans ledit passage où elle se solidifie ou se coagule pour former un dispositif détanchéité. De manière avantageuse, le composé de laurate est du laurate dammonium et la coagulation est commodément induite en ajustant le pH de la composition détanchéité dun régime de pH alcalin à un régime de pH acide. Le procédé est particulièrement bien adapté à létanchéification de formations défectueuses ou de sites détanchéification, et peut être utilisé pour létanchéification au sein de mines de sel qui contiennent de la saumure.

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