The use of biodegradable alkoxylation products for cleaning...

E - Fixed Constructions – 21 – B

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E21B 37/06 (2006.01) C09K 8/32 (2006.01) C09K 8/52 (2006.01) C11D 1/74 (2006.01) C11D 11/00 (2006.01)

Patent

CA 2270257

The use of biodegradable alkoxylation products obtained by reaction of ethylene oxide, propylene oxide and/or butylene oxide with C10-22 carboxylic acids or C10-22 carboxylic acid derivatives which, at least in the 9/10 and/or 13/14 position, contain structural units corresponding to general formula (I): Image in which R1 is a hydrogen atom or an OH group or a group OR2, where R2 is an alkyl group containing 1 to 18 carbon atoms, an alkenyl group containing 2 to 18 carbon atoms or a group corresponding to formula (II): Image where R3 is a hydrogen atom, an alkyl group containing 1 to 21 carbon atoms or an alkylene group containing 2 to 21 carbon atoms, for cleaning boreholes, drilling equipment or drill cuttings.

Utilisation de produits d'alcoxylation biodégradables pour le nettoyage de trous de forage, d'équipements de forage ou de déblais de forage, lesdits produits étant obtenus par réaction d'oxyde d'éthylène, d'oxyde de propylène et/ou d'oxyde de butylène avec des acides carboxyliques en C10-22 ou des dérivées de tels acides renfermant, au moins en position 9/10 et/ou en position 13/14, des motifs structuraux de formule générale (I), dans laquelle R<1> désigne un atome d'hydrogène, ou un groupe OH ou un groupe OR<2>, R<2> désigne un groupe alkyle de 1 à 18 atomes de carbone, un groupe alkényle de 2 à 18 atomes de carbone ou un groupe de formule (II), et R<3> désigne un atome d'hydrogène, un groupe alkyle de 1 à 21 atomes de carbone, ou un groupe alkylène de 2 à 21 atomes de carbone.

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