C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 8/62 (2006.01) A61K 31/14 (2006.01) C09K 8/64 (2006.01) C09K 8/80 (2006.01) C11D 1/62 (2006.01)
Patent
CA 2628718
Viscoelastic compositions are disclosed herein containing an effective amount of one or more random or structurally defined polycationic quaternary ammonium compounds for controlling the viscoelasticity of the composition. In one aspect, the present technology provides polycationic quaternary ammonium compounds that comprise bis-quaternary compound. The bis-quaternary compounds of the present technology can be symmetric or dissymmetric. In another aspect, the present technology provides viscoelastic well bore treatment fluids comprising water, and at least one polycationic quaternary ammonium compound that comprises a bis-quaternary compound. In another aspect, the present technology provides polycationic carboxylates. Preferred viscoelastic compositions of the present technology maintain viscoelasticity at a temperature greater than about 80~ C, preferably greater than about 100~ C or 110~ C when the amount of the one or polycationic quaternary compounds is less than about 10% by weight based on the total weight of the composition.
L'invention concerne des compositions viscoélastiques qui contiennent une quantité efficace d'un ou de plusieurs composés d'ammonium quaternaires polycationiques aléatoires ou définis de manière structurelle destinés à réguler la viscoélasticité de ladite composition. Dans un aspect, l'invention concerne des composés d'ammonium quaternaires polycationiques comprenant un composé bis-quaternaire. Les composés bis-quaternaires selon l'invention peuvent être symétriques ou dissymétriques. Dans un autre aspect, l'invention concerne des liquides de traitement de puits de forage viscoélastique comprenant de l'eau, et au moins un composé d'ammonium quaternaire polycationique comprenant un composé bis-quaternaire. Dans un autre aspect encore, l'invention concerne des carboxylates polycationiques. Des compositions viscoélastiques préférées selon l'invention conservent la viscoélasticité à une température supérieure à environ 80 °C, de préférence supérieure à environ 100 °C ou 110 °C, lorsque la quantité de ces composés quaternaires polycationiques est inférieure à environ 10 % en poids sur la base du poids total de la composition.
Mbm Intellectual Property Law Llp
Stepan Company
LandOfFree
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