Dual pathway riser and its use for production of petroleum products in multi-phase fluid pipelines
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United States of America Patent
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Oct 15, 2013
Grant Date -
Jun 2, 2011
app pub date -
Nov 29, 2010
filing date -
Dec 2, 2009
priority date (Note) -
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Abstract
Disclosed is a tubing system for transporting a gas-liquid flow from a well to a production platform or processing facility. It includes a dual pathway section between the well and the production point having a first tubing portion and a second tubing portion. The second tubing portion includes a plurality of parallel channels so as to divide the multi-phase flow into a plurality of flows through individual channels. This is done to reduce flow slippage of the lower viscosity portion of the flow, which may lead to inefficiencies in flow characteristics, and often, undesirable cyclical variations in pressure and fluid volume. This is especially useful in inclined portions of the petroleum flow pipe system and along hilly terrain. The first round tubing portion is used for transporting the gas-liquid flow as well as for maintenance purposes, such as for pigging, fishing or coiled tubing operations.
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