Drilling fluid containing carbon nanotubes
AssigneesArkema France, Total SA
InventorsNicolas Passade-Boupat, Cathy Rey, Mathieu Naegel
Life of this patent
Estimating the term…
Abstract
The present invention relates to a viscoelastic drilling fluid for drilling in underground rock formations, comprising (a) an aqueous and/or organic liquid base, (b) at least one weighting agent, in particulate form, with a mass per unit volume of at least 2 g/cm3, preferably at least 4 g/cm3, in suspension in said liquid base, and (c) carbon nanotubes with a mean diameter of between 10 and 30 nm and a specific surface in excess of 200 m2/g, preferably of between 200 m2/g and 250 m2/g. It also relates to a drilling method using such a fluid.
Claims21
Viscoelastic drilling fluid for drilling in underground rock formations, comprising
- (a) an aqueous and/or organic liquid base,
- (b) at least one weighting agent, in particulate form, with a mass per unit volume of at least 2 g/cm3, preferably at least 4 g/cm3, in suspension in said liquid base, and
- (c) carbon nanotubes with a mean diameter of between 10 and 30 nm and a specific surface in excess of 200 m2/g, preferably of between 200 m2/g and 250 m2/g.
Method of drilling in underground rock formations involving injecting a drilling fluid that contains an aqueous and/or organic liquid base and carbon nanotubes with a mean diameter ranging from 10 to 30 nm, the carbon nanotube content of the drilling fluid being increased as the drilling depth, the drilling temperature and/or the drilling pressure increase(s).
A method for drilling underground formations comprising injecting a drilling fluid that contains carbon nanotubes with a mean diameter of between 10 and 30 nm and a specific surface greater than 200 m2/g.
Dependencies are inferred from the claim text.