Silicone oil-based drilling fluids
AssigneeM-I Drilling Fluids Company
InventorArvind D. Patel
Life of this patent
Estimating the term…
Abstract
The present invention relates to an improved continuous phase for a drilling fluid and specifically a silicone continuous phase which is non-polluting and substantially non-toxic. Preferred silicones for use in the invention are dimethylsiloxane polymers. In the drilling fluid compositions, suitable emulsifiers, wetting agents, viscosifiers, weight materials and fluid loss additives may be added in conjunction with water and/or a brine phase for desired rheological properties.
Claims18
A drilling fluid comprising a continuous phase and an aqueous internal phase, wherein the continuous phase of said drilling fluid comprises at least about five percent of a dimethylsiloxane polymer fluid having a viscosity in the range of about 2 to 1000 centistokes at 25.degree. Centigrade, and an emulsifier, said emulsifier is selected from the group consisting of;
- fatty acids, soaps of fatty acids, amido-amines, polyamides, polyamines, oleate esters, imidazolines, alcohols, polyalkylene oxides dimethyl polysiloxanes, and combinations thereof.
An improved continuous phase for a drilling fluid, where the improvement comprises said continuous phase comprising at least about five percent of a dimethylsiloxane polymer fluid, said fluid having a viscosity in the range of about 2 to 1000 centistokes at 25.degree. Centigrade, and an emulsifier, said emulsifier is selected from the group consisting of;
- fatty acids, soaps of fatty acids, amido-amines, polyamides, polyamines, oleate esters, imidazolines, alcohols, polyalkylene oxides dimethyl polysiloxanes, and combinations thereof.
A silicone -based drilling fluid comprising:
- (a) a continuous phase, said continuous phase comprising at least about five percent of a dimethylsiloxane polymer fluid, said fluid having a viscosity in the range of about 2 to 1000 centistokes at 250 Centigrade;
- (b) a weighting material;
- (c) water;
- and
- (d) an emulsifier, said emulsifier is selected from the group consisting of:
- fatty acids, soaps of fatty acids, amido-amines, polyamides, polyamines, oleate esters, imidazolines, alcohols, polyalkylene oxides dimethyl polysiloxanes, and combinations thereof.
Dependencies are inferred from the claim text.