Method for the treatment and prevention of...

E - Fixed Constructions – 21 – B

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E21B 37/06 (2006.01) B09C 1/10 (2006.01) C09K 8/524 (2006.01) C12P 1/00 (2006.01) E21B 37/08 (2006.01)

Patent

CA 2501359

The present invention relates to a method for the prevention, reduction and/or removal of asphaltene-paraffin-vax precipitates on surfaces in contact with crude oil within oil~-wells from bottom hole to well head, in flow lines and pipelines by the use of biocolloid suspensions. In particular, the method comprises adding together (a) microorganism(s) capable of reacting with, solubilizing of and/or resistant to the components of crude oil, (b) organic or inorganic additives, or (c) a mixture thereof into the pipes, and the so formed suspension containing the microorganisms is allowed to act for a desired time. The said suspension can be used for the decomposition, washing- off and removal of solid hydrocarbons and mixtures of long chain hydrocarbons, as well as for the prevention of formation thereof.

La présente invention concerne un procédé reposant sur l'emploi de suspensions biocolloïdales pour la prévention, l'atténuation ou l'élimination de précipités d'asphaltène-paraffine-cire sur les surfaces en contact avec le brut entre le fonds et la tête de puits, dans les conduites d'écoulement et les oléoducs. Ce procédé consiste en particulier à ajouter les uns aux autres: (a) des micro-organismes capables de réagir avec les composants du brut, de solubiliser lesdits composants du brut ou de leur résister ; (b) des additifs organiques ou inorganiques ; et (c) un mélange de ces produits dans les conduites. On laisse agir la suspension ainsi formée pendant la durée requise. Ladite suspension peut être utilisée pour faire se décomposer, rincer et extraire des hydrocarbures et des mélanges solides d'hydrocarbures à chaîne longue, et pour en prévenir la formation.

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