Use of biodegradable hydrocarbon fluids as drilling fluids
AssigneeTotal Marketing Services
InventorsLaurent Germanaud, Clarisse Doucet, John-Philippe Robinson
Life of this patent
Estimating the term…
Abstract
The invention is a fluid having a kinematic viscosity from 3 to 6 mm2/s, a flash point of higher than 120° C. and a pour point lower than −40° C., having a boiling point in the range of from 200° C. to 400° C. and a boiling range below 80° C., said fluid comprising more than 95% isoparaffins and less than 3% of naphthens by weight, a biocarbon content of at least 95% by weight, containing less than 100 ppm aromatics by weight. The invention is also a drilling fluid and the use of the fluid to improve the viscosity of the drilling fluid.
Claims14
A drilling fluid comprising a fluid having an initial boiling point and a final boiling point in the range of from 220° C. to 340° C. and a boiling range below 80° C., said fluid comprising more than 95% isoparaffins and less than 1% of naphthens by weight, a biocarbon content of at least 95% by weight, containing less than 100 ppm aromatics by weight, the drilling fluid further comprising barite, wherein the fluid has a biodegradability at 28 days of at least 60%, as measured according to the OECD 306 standard, said fluid presenting an aniline point greater than 90° C. measured according to EN ISO 2977.
A method for improving lubricity of drilling fluids, said method comprising:
- adding a fluid to a drilling fluid, the fluid having an initial boiling point and a final boiling point in the range of from 220° C. to 340 ° C. and a boiling range below 80° C., said fluid comprising more than 95% isoparaffins and less than 1% of naphthens by weight, a biocarbon content of at least 95% by weight, containing less than 100ppm aromatics by weight, wherein the fluid has a biodegradability at 28 days of at least 60%, as measured according to the OECD 306 standard, wherein the fluid of the drilling fluid is a continuous oil phase.
A drilling fluid comprising a fluid having an initial boiling point and a final boiling point in the range of from 220° C. to 340° C. and a boiling range below 80° C., said fluid comprising more than 95% isoparaffins and less than 1% of naphthens by weight, a biocarbon content of at least 95% by weight, containing less than 100 ppm aromatics by weight, the drilling fluid further comprising barite, wherein the fluid has a biodegradability at 28 days of at least 60%, as measured according to the OECD 306 standard, wherein the fluid comprises:
- C15 isoparaffins and C16 isoparaffins in a combined amount of 80 to 98%;
- or
- C16 isoparaffins, C17 isoparaffins and C18 isoparaffins in a combined amount of 80 to 98%;
- or
- C17 isoparaffins and C18 isoparaffins in a combined amount of 80 to 98%, said fluid presenting an aniline point greater than 90° C. measured according to EN ISO 2977.
A drilling fluid comprising a fluid having an initial boiling point and a final boiling point in the range of from 220° C. to 340° C. and a boiling range below 80° C., said fluid comprising more than 95% isoparaffins and less than 1% of naphthens by weight, a biocarbon content of at least 95% by weight, containing less than 100 ppm aromatics by weight, the drilling fluid further comprising barite, wherein the fluid has a biodegradability at 28 days of at least 60%, as measured according to the OECD 306 standard, wherein the fluid of the drilling fluid is a continuous oil phase.
Dependencies are inferred from the claim text.