Thermal insulation gel with controlled crosslinking for petroleum hydrocarbon transmission lines
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United States of America Patent
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Aug 23, 2005
Grant Date -
Apr 7, 2005
app pub date -
Feb 4, 2002
filing date -
Feb 7, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to and uses, in order to prevent crude oil from 'congealing' in a transportation line, a controlled-crosslinking thermal insulation gel, i.e. relatively fluid at the start and developing in-situ gelation in lines only under certain conditions, temperature conditions among other things. In order to obtain controlled crosslinking, it is possible to carry out 1) Physical crosslinkings, i.e. physical bonds between polymers-completely reversible bonds by thermal effect and/or mechanical shear-and 2) Chemical crosslinkings: monomers or polymers having functions allowing chemical bonds to be established between polymers.
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