Method for driving a drilling operation in an underground formation, drilling fluid gel fragile, and.Methods to reduce the loss of drilling fluid to the interior of an underground formation.To eliminate or avoid the trim during drilling operations and for preparing a drilling fluid

摘要

Method for driving a drilling operation in an underground formation, drilling fluid gel fragile, and.Methods to reduce the loss of drilling fluid to the interior of an underground formation.To eliminate or avoid the trim during drilling operations and for preparing a drilling fluid.It is exposed to a method for drilling, casing running in, and / or cementation of a drill hole in an underground formation, without significant loss of drilling fluid.As well as compositions for use in such a method.The method employs a drilling fluid comprising a gel fragile, or having a fragile behavior of gel, and providing rheology of mud oil and overall performance higher.The fluid is especially advantageous for use in wells in deep waters.Because the fluid exhibits a minimum difference between the density of movement equivalent downhole and surface density, despite the differences in rates of perforation or penetration.When an ester and a mixture of isomerized olefin are used as the basis of the fluid.The fluid takes a reverse emulsion drilling fluid which meets the regulatory standards and environmentally acceptable. Preferably, the fluid does not contain organophilic clays.