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US 11,028,308 B2Granted
Invert emulsifiers from DCPD copolymers and their derivatives for drilling applications
AssigneeSchlumberger Technology Corporation
InventorsYiyan Chen, Dimitri M. Khramov, Glynda A. Addicks
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Abstract
Wellbore fluids and methods of drilling with the wellbore fluids are provided. One wellbore fluid may include an oleaginous continuous phase, a non-oleaginous discontinuous phase, and a polymer having a polycyclic backbone. One method may include pumping the wellbore fluid into a wellbore through an earthen formation.
Claims14
A method of drilling, comprising:
- pumping a wellbore fluid into a wellbore through an earthen formation, the wellbore fluid comprising:
- an oleaginous continuous phase;
- a non-oleaginous discontinuous phase formed as emulsion droplets;
- and
- a polymer having a polycyclic backbone,
- wherein
- a particle size distribution of a majority of the emulsion droplets is less than 100 microns,
- a peak of the particle size distribution of the majority of the emulsion droplets is greater than 1 micron and less than 10 microns,
- a first portion of the emulsion droplets having first particle sizes of less than 10 microns, and
- a second portion of the emulsion droplets have second particle sizes of greater than 10 microns and less than 100 microns.
7 more elements
A method of drilling, comprising:
- pumping a wellbore fluid into a wellbore through an earthen formation, the wellbore fluid comprising:
- an oleaginous continuous phase;
- a non-oleaginous discontinuous phase formed as emulsion droplets;
- and
- a polymer having a polycyclic backbone and a polydispersity ranging from 1.77 to 2.48,
- wherein
- a particle size distribution of a majority of the emulsion droplets is less than 100 microns
- a first portion of the emulsion droplets having first particle sizes of less than 10 microns, and
- a second portion of the emulsion droplets have second particle sizes of greater than 10 microns and less than 100 microns.
6 more elements
Dependencies are inferred from the claim text.