Reduced abrasiveness with micronized weighting material

E - Fixed Constructions – 21 – B

Patent

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E21B 21/06 (2006.01) C09K 8/03 (2006.01)

Patent

CA 2732627

A method of prolonging the average lifespan of downhole tools that includes circulating the wellbore fluid comprising a base fluid and at least one of a micronized weighting agent and a dispersant coated weighting agent through the wellbore; wherein the wellbore fluid is characterized as having at least one of an equivalent weight, an equivalent or lower settling rate, and an equivalent or lower sag than a baseline wellbore fluid comprising a base fluid and an API-grade barite weighting agent; and wherein the wellbore fluid reduces abrasive wear of the downhole tool as compared to drilling with the baseline wellbore fluid is disclosed.

L'invention porte sur un procédé d'allongement du temps de vie moyen d'outils de fond de puits qui consiste à faire circuler le fluide de puits de forage comprenant un fluide de base et au moins un agent parmi un agent d'alourdissement micronisé et un agent d'alourdissement enrobé de dispersant dans le puits de forage ; le fluide de puits de forage étant caractérisé par le fait qu'il présente au moins l'une des caractéristiques parmi un poids équivalent, une vitesse de sédimentation équivalente ou inférieure et un affaissement équivalent ou inférieur par rapport à un fluide de puits de forage de référence comprenant un fluide de base et un agent d'alourdissement en baryte de qualité API ; et le fluide de puits de forage réduisant l'usure par abrasion de l'outil de fond de puits par comparaison au forage avec le fluide de puits de forage de référence.

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