METHOD OF TRANSPORTING A VISCOUS PRODUCT BY CORE ANNULAR FLOW
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United States of America Patent
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Issued Date -
May 28, 2009
app pub date -
Nov 9, 2005
filing date -
Nov 18, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Method relating to the transportation of viscous products in a pipe by core annular flow, allowing to limit the restart pressures required for circulating the viscous product.Core annular flow is a technique allowing pipe transportation of a very viscous product with limited pressure drops. However, in case of density difference between the fluids, transverse displacements of the viscous product towards the wall lead to stratification and the restart pressures are then high, because the viscous part has to be deformed. In order to limit these pressures, we propose limiting transverse displacements by injecting into said pipe a yield stress fluid allowing to generate a transverse displacement resistance. Additives can be added to the water layer conventionally used to obtain such a yield stress fluid.Application: notably viscous hydrocarbons transportation.
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