Method of making drilling fluids containing microbubbles

Details Method of making drilling fluids containing microbubbles Method of making drilling fluids containing microbubbles

E - Fixed Constructions

21

B

E21B 21/14 (2006.01) E21B 21/06 (2006.01)

Patent

CA 2704020

Light weight drilling fluids are prepared by passing a gas and the drilling fluid through a cavitation device. Bubbles are finely divided into microbubbles, thereby reducing the density of the fluid. Low HLB surfactants, natural polymers, and ionic- charged polymers may be added to enhance the stability of the microbubble suspension.

L'invention concerne un procédé de préparation de fluides de forage légers, consistant à faire passer un gaz et le fluide de forage dans un dispositif de cavitation. Des bulles sont finement divisées en microbulles, ce qui permet de réduire la densité du fluide. Des tensio-actifs présentant un faible HLB (équilibre hydrophile/lipophile), des polymères naturels et des polymères ioniquement chargés peuvent être ajoutés pour accroître la stabilité de la suspension de microbulles.

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