Free-flowing solid encapsulated drag reducing additives
AssigneeBaker Hughes, A Ge Company, LLC
InventorsBrandon Vittur, Anthony D. Bravo, Ross Poland
Life of this patent
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Abstract
A process of manufacturing a free-flowing solid encapsulated drag reducing additive comprises: forming a solid drag reducing additive from one or more C5-20 olefin monomers; dispersing the solid drag reducing additive in a liquid medium to form a dispersion, the liquid medium comprising an encapsulant and a non-solvent; grinding the solid drag reducing additive in the liquid medium under non-cryogenic grinding conditions to form an encapsulated drag reducing additive in a particulate form; and removing the non-solvent by a drying technique including spray drying, flash drying, or rotating disc drying to form the free-flowing solid encapsulated drag reducing additive.
Claims18
A process of manufacturing a free-flowing solid encapsulated drag reducing additive, the process comprising:
- forming a solid drag reducing additive from one or more C5-20 olefin monomers;
- dispersing the solid drag reducing additive in a liquid medium to form a dispersion, the liquid medium comprising an encapsulant and a non-solvent;
- grinding the solid drag reducing additive in the liquid medium under non-cryogenic grinding conditions to form a second dispersion comprising encapsulated drag reducing additive particles;
- feeding the second dispersion comprising the encapsulated drag reducing additive particles into a spray dryer in a form of droplets using an atomizer or a spray nozzle;
- contacting the droplets with a heated gas;
- and
- removing the non-solvent to form the free-flowing solid encapsulated drag reducing additive, the heated gas having an inlet temperature of 50° C. to 300° C. and an outlet temperature of 25° C. to 100° C.
A process of manufacturing a free-flowing solid encapsulated drag reducing additive, the process comprising:
- forming a solid drag reducing additive from one or more C5-20 olefin monomers;
- grinding the solid drag reducing additive in the presence of an encapsulant under cryogenic grinding conditions to form encapsulated drag reducing additive particles;
- dispersing the encapsulated drag reducing additive particles in a liquid medium to form a dispersion, the liquid medium comprising a non-solvent;
- feeding the dispersion comprising the encapsulated drag reducing additive particles into a spray dryer in a form of droplets using an atomizer or a spray nozzle;
- contacting the droplets with a heated gas;
- and
- removing the non-solvent by a drying technique including spray drying, flash drying, or rotating disc drying to form the free-flowing solid encapsulated drag reducing additive, the heated gas having an inlet temperature of 50° C. to 300° C. and an outlet temperature of 25° C. to 100° C.
Dependencies are inferred from the claim text.