Abstract: A system for reducing pressure drop associated with the turbulent flow of asphaltenic crude oil through a conduit. The crude oil has a high asphaltene content and/or a low API gravity. Such reduction in pressure drop is achieved by treating the asphaltenic crude oil with a high molecular weight drag reducing polymer that can have a solubility parameter within about 20 percent of the solubility parameter of the heavy crude oil. The drag reducing polymer can also comprise the residues of monomers having at least one heteroatom.

Abstract: A system for reducing pressure drop associated with turbulent fluid flow through subsea conduits. Such reduction in pressure drop is accomplished by transporting a hydrate inhibited drag reducer through a long conduit of small diameter, and thereafter injecting the drag reducer into a host fluid at the subsea location, to make a treated fluid. The treated fluid is then extracted from the subsea location via a production/transportation conduit. The presence of the drag reducer in the treated fluid reduces pressure drop associated with flow through the production/transportation conduit.