Lost circulation compositions and methods of using them

Details Lost circulation compositions and methods of using them Lost circulation compositions and methods of using them

C - Chemistry, Metallurgy

09

K

C09K 8/512 (2006.01) C09K 8/035 (2006.01) E21B 33/138 (2006.01)

Patent

CA 2639917

A lost circulation composition for use in a wellbore comprising a crosslinkable polymer system and a filler. The invention also relates to a method of servicing a wellbore in contact with a subterranean formation, comprising: placing a wellbore servicing fluid comprising a crosslinkable polymer system and a filler into a lost circulation zone within the wellbore. The invention also relates to a method of blocking the flow of fluid through a lost circulation zone in a subterranean formation comprising placing a first composition comprising a packing agent into the lost circulation zone, placing a second composition comprising a crosslinkable polymer system and a filler into the lost circulation zone, and allowing the compositions to set into place.

La présente invention concerne une composition de perte de circulation destinée à une utilisation dans un puits comprenant un système polymère réticulable et une charge. L'invention concerne également un procédé d'entretien d~un puits en contact avec une formation souterraine, comprenant : le placement d'un fluide d~entretien de puits comprenant un système polymère réticulable et une charge dans une zone de perte de circulation à l~intérieur du puits. L'invention concerne également un procédé de blocage d~écoulement du fluide à travers une zone de perte de circulation dans une formation souterraine comprenant le fait de placer une première composition comprenant un agent de remplissage dans la zone de perte de circulation, placer une seconde composition comprenant un système polymère réticulable et une charge dans la zone de perte de circulation, et permettre aux compositions de rester dans cette position.

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