DRILLING FLUID CONTAINING CARBON NANOTUBES

摘要

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.