Particulate bridging agents used for forming and breaking...

Details Particulate bridging agents used for forming and breaking... Particulate bridging agents used for forming and breaking...

E - Fixed Constructions

21

B

E21B 33/138 (2006.01)

Patent

CA 2743142

A method of preventing fluid loss to a wellbore that includes pumping a wellbore fluid into the wellbore through a subterranean formation, the wellbore fluid comprising: a base fluid; and a plurality of particulate bridging agents comprising a sol-id breaking agent encapsulated by one of an inorganic solid material and an oil- soluble resin; and allowing some filtration of the wellbore fluid into the subterranean formation to produce a filter cake comprising the particulate bridging agents is disclosed.

L'invention concerne un procédé pour empêcher une perte de fluide dans un puits de forage, comprenant le pompage d'un fluide de puits de forage dans le puits de forage à travers une formation souterraine, le fluide de puits de forage comprenant: un fluide de base; une pluralité d'agents de pontage particulaires comprenant un agent de cassage solide enveloppé par une matière solide inorganique et une résine oléosoluble; et autoriser une filtration du fluide de puits de forage dans la formation souterraine afin de produire un gâteau de filtration contenant les agents de pontage particulaires.

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