Liquidpower Specialty Products Inc.

Conocophillips Company

Lubrizol Specialty Products, Inc.

Wayne R Dreher

Stuart N Milligan

Kenneth W Smith

Ray L Johnston

Timothy L Burden

William Franklin Harris, Jr

Wolfgang Klesse

Gerold Schmitt

John Wey

Curtis G Blount

John L Stalder

Daniel R Sultenfuss

Zhiyi Bao

Michael L Olechnowicz

Partha Sarathi

Wendell P Menard

Dwijen K Banerjee

A flow improver comprising a plurality of core-shell particles that can be formed by emulsion polymerization. The core of the core-shell particles can include a drag reducing polymer, while the shell of the particles can include repeat units of a hydrophobic compound and an amphiphilic compound. The flow improver can demonstrate increased pumping stability over conventionally prepared latex flow improvers.

Core-shell flow improver

A drag reducing composition comprising at least one non-polyalphaolefin polymer having an average particle size in the range of from about 5 to about 800 micrometers. The non-polyalphaolefin polymer can initially be formed via emulsion polymerization. The initial polymer particles can then be at least partially consolidated and then reduced in size and suspended in a carrier fluid. The resulting drag reducing composition can be added to a hydrocarbon-containing fluid to decrease the pressure drop associated with the turbulent flow of the hydrocarbon-containing fluid through a conduit.

Disperse non-polyalphaolefin drag reducing polymers

A process for preparing a drag reducing polymer which is to be added to a liquid hydrocarbon. The liquid hydrocarbon has an asphaltene content of at least about 3 weight percent and an API gravity of less than about 26&#xb0;. The drag reducing polymer can comprise the residues of a monomer having at least one heteroatom. Treatment of the liquid hydrocarbon with the drag reducing polymer allows a reduction in pressure drop associated with turbulent flow of the liquid hydrocarbon through a conduit.

Drag reduction of asphaltenic crude oils

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Germantown, TN, United States of America

Wayne R Dreher