Single phase microemulsions improve the removal of filter cakes formed during drilling with invert emulsions. The single phase microemulsion removes oil and solids from the deposited filter cake. Optionally, an acid capable of solubilizing the filter cake bridging particles may also be used with the...http://www.google.es/patents/US7687439?utm_source=gb-gplus-sharePatente US7687439 - Method of removing an invert emulsion filter cake after the drilling process using a single phase microemulsion
Method of removing an invert emulsion filter cake after the drilling process ...
