Back to results
US 11,634,620 B2Granted
Method for reducing the rheology of high internal-phase-ratio emulsion wellbore fluids
AssigneeSchlumberger Technology Corporation
InventorsMostafa A. Tehrani, Louise Bailey
Life of this patent
Estimating the term…
Abstract
An invert emulsion fluid may include a oleaginous external phase, a nonoleaginous internal phase, wherein a ratio of the oleaginous external phase to nonoleaginous internal phase is less than 55:45, a emulsifier, a particulate weighting agent dispersed in the non-oleaginous internal phase, and a viscosifier stabilizing the dispersion of the particulate weighting agent in the non-oleaginous internal phase.
Claims26
An invert emulsion fluid, comprising:
- an oleaginous external phase;
- a non-oleaginous internal phase, wherein a ratio of the oleaginous external phase to non-oleaginous internal phase is less than 55:45;
- an emulsifier selected from an alkoxylated ether acid;
- a dispersion of particulate weighting agent in the non-oleaginous internal phase;
- and
- a viscosifier stabilizing the dispersion of the particulate weighting agent in the non-oleaginous internal phase.
3 more elements
An invert emulsion fluid, comprising:
- an oleaginous external phase;
- a non-oleaginous internal phase, wherein a ratio of the oleaginous external phase and non-oleaginous internal phase is less than 55:45;
- and
- an emulsifier stabilizing the oleaginous external phase and the non-oleaginous internal phase;
- and
- a particulate weighting agent dispersed in the non-oleaginous internal phase;
- wherein an average diameter of the non-oleaginous internal phase ranges from about 1-30 micrometers and a concentration of the emulsifier ranges from 1 to 15 pounds per barrel.
4 more elements
A method of making a high internal phase ratio invert emulsion fluid, comprising:
- viscosifying a non-oleaginous phase with a viscosifier;
- dispersing a weighting agent in the viscosified non-oleaginous phase;
- and
- dispersing the viscosified and weighted non-oleaginous phase into an oleaginous phase with an invert emulsifier, wherein a ratio of the oleaginous external phase and non-oleaginous internal phase is less than 55:45.
1 more element
Dependencies are inferred from the claim text.