Drilling fluid containing carbon nanotubes

Details Drilling fluid containing carbon nanotubes Drilling fluid containing carbon nanotubes

C - Chemistry, Metallurgy

09

K

C09K 8/03 (2006.01) B82B 3/00 (2006.01) C09K 8/04 (2006.01) C09K 8/32 (2006.01) C09K 8/36 (2006.01) E21B 43/25 (2006.01)

Patent

CA 2698226

The present invention relates to a viscoelastic drilling fluid for drilling in subterranean rock formations, which comprises: (a) an aqueous and/or organic liquid base; (b) at least one weighting agent, in particulate form, having a density at least equal to 2 g/cm3, preferably at least equal to 4 g/cm3, in suspension in said liquid base; and (c) carbon nanotubes having a mean diameter between 10 and 30 nm and a specific surface area greater than 200 m2/g, preferably between 200 m2/g and 250 m2/g. The invention also relates to a drilling method using such a fluid.

La présente invention concerne un fluide viscoélastique de forage dans des formations rocheuses souterraines, comprenant (a) une base liquide aqueuse et/ou organique, (b) au moins un agent alourdissant, sous forme particulaire, ayant une masse volumique au moins égale à 2 g/ cm3, de préférence au moins égale à 4 g/ cm3, en suspension dans ladite base liquide1 et (c) des nanotubes de carbone ayant un diamètre moyen compris entre 10 et 30 nm et une surface spécifique supérieure à 200 m/g, de préférence comprise entre 200 m2/g et 250 m2/g. Elle concerne également un procédé de forage utilisant un tel fluide.

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