A process for the simplified disposal of working fluids...

C - Chemistry – Metallurgy – 09 – K

Patent

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Details

C09K 8/28 (2006.01) C09K 3/00 (2006.01) C09K 8/36 (2006.01) E21B 21/06 (2006.01)

Patent

CA 2271040

The invention concerns a process for the facilitated waste disposal of flowable and pumpable working substances based on water-in-oil invert emulsions containing emulsifiers - in particular corresponding auxiliary agents from the field of exploratory boring of the earth, such as oil-based water-in-oil invert bore-flushing substances - and for the facilitated cleaning of solids surfaces contaminated therewith, optionally also using flowable rinsing aids. The process is characterized in that, by selecting and adapting the emulsifier/emulsifier systems to the oil phase of the invert emulsion, temperature-controlled phase inversion is ensured by solidification in the temperature range below the operating temperatures of the water-in-oil invert emulsions, but above the solidification temperature of the aqueous phase, and waste disposal or cleaning is carried out in the temperature range of the phase inversion and/or at temperatures lying therebelow. The invention further concerns the application of this process for the cleaning and waste disposal of the cuttings charged with residual amounts of boring mud from boring of the ground during and/or preferably before it is disposed of on- shore or off-shore.

L'invention a pour objet un procédé destiné, d'une part, à faciliter l'évacuation de fluides actifs aptes à l'écoulement et au pompage, à base d'émulsions inversées eau dans l'huile contenant des émulsifiants en particulier des auxiliaires correspondants utilisés pour le forage de recherche, tels que des fluides de forage à base d'huiles, inversées eau dans l'huile - et, d'autre part, à faciliter le nettoyage des matières solides ainsi encrassées, le cas échéant avec utilisation de produits auxiliaires de rinçage. Ce procédé est caractérisé en ce qu'on garantit, en choisissant et en adaptant les émulsifiants ou systèmes émulsifiants ou systèmes émulsifiants à la phase huileuse de l'émulsion inversée, une inversion de phase contrôlée par la température, dans la gamme de température inférieure aux températures d'utilisation des émulsions inversées eau dans l'huile, mais supérieure à la température de solidification de la phase aqueuse, et en ce qu'on effectue l'évacuation ou l'épuration dans un domaine de température d'inversion de phase et/ou à des températures inférieures. L'invention concerne en outre l'utilisation de ce procédé pour l'épuration et l'évacuation des déblais de forage chargés des restes de boues de forage provenant du forage du sol au cours de leur dépôt à terre ou en mer et/ou, de préférence, avant ce dépôt.

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