E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 37/06 (2006.01) C09K 8/524 (2006.01)
Patent
CA 2282322
Fatty acid esters of general formula (I) R1-COO-(CnH2nO)x-R2 are used to remove solid asphalt residues from the surface of petroleum industry installations or petroliferous formations around petroleum bore holes. In formula (I) R1-COO-(CnH2nO)x-R2, R1 stands for an alkyl radical with 6 to 22 C atoms or for a (CH2)m-COOR4 radical, R2 and R4 independently representing an alkyl radical with 1 to 8 C atoms, n equals 2 or 3, m equals 1 to 6 and x equals 0 or a number from 1 to 12.
L'invention concerne l'utilisation d'esters d'acides gras de formule générale (I) R?1¿-COO-(C¿n?H¿2n?O)¿x?-R?2¿ pour éliminer les résidus solides d'asphalte déposés sur la surface d'installations de production de l'industrie pétrolière ou les couches pétrolifères qui se forment autour des puits de pétrole. Dans la formule (I), R?1¿ désigne un radical alkyle de 6 à 22 atomes de carbone ou un radical (CH¿2?)¿m?-COOR?4¿, R?2¿ et R?4¿ représentant indépendamment l'un de l'autre un radical alkyle de 1 à 8 atomes de carbone, n vaut 2 ou 3, m vaut 1 à 6 et x vaut 0 ou un nombre entre 1 et 12.
Breuer Wolfgang
Herold Claus-Peter
Henkel Kommanditgesellschaft Auf Aktien
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
LandOfFree
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