Additives and method for controlling clathrate hydrates in fluid systems

Patent · Tue Dec 31 23:00:00 EST 1996

OSTI ID:871007

Christiansen, Richard Lee ^[1]; Lederhos, Joseph P ^[2]; Long, Jin Ping ^[3]; Panchalingam, Vaithilingam ^[4]; Du, Yahe ^[5]; Sum, Amadeu Kun Wan ^[5]

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1. Littleton, CO
2. Wheatridge, CO
3. Dallas, TX
4. Lakewood, CO
5. Golden, CO

Discussed is a process for preventing clathrate hydrate masses from detrimentally impeding the possible flow of a fluid susceptible to clathrate hydrate formation. The process is particularly useful in the natural gas and petroleum production, transportation and processing industry where gas hydrate formation can cause serious problems. Additives preferably contain one or more five member, six member and/or seven member cyclic chemical groupings. Additives include polymers having lactam rings. Additives can also contain polyelectrolytes that are believed to improve conformance of polymer additives through steric hinderance and/or charge repulsion. Also, polymers having an amide on which a C.sub.1 -C.sub.4 group is attached to the nitrogen and/or the carbonyl carbon of the amide may be used alone, or in combination with ring-containing polymers for enhanced effectiveness. Polymers having at least some repeating units representative of polymerizing at least one of an oxazoline, an N-substituted acrylamide and an N-vinyl alkyl amide are preferred.

• Research Organization: Colorado School of Mines (Golden, CO)
• DOE Contract Number: FG21-92MC29248
• Assignee: Colorado School of Mines (Golden, CO)
• Patent Number(s): US 5639925
• OSTI ID: 871007
• Country of Publication: United States
• Language: English

Related Subjects

-c
/585/95/137/166/
acrylamide
additives
additives preferably
alkyl
amide
attached
believed
carbon
carbonyl
charge
chemical
chemical groupings
clathrate
clathrate hydrate
clathrate hydrates
combination
conformance
contain
containing poly
containing polymer
containing polymers
controlling
controlling clathrate
cyclic
cyclic chemical
detrimentally
discussed
effectiveness
enhanced
five
flow
fluid
fluid systems
formation
gas
gas hydrate
groupings
hinderance
hydrate
hydrate formation
hydrate masses
hydrates
impeding
improve
industry
lactam
masses
method
n-substituted
n-substituted acrylamide
n-vinyl
natural
natural gas
nitrogen
oxazoline
particularly
particularly useful
petroleum
petroleum product
petroleum production
polyelectrolytes
polymer
polymerizing
polymers
preferably
preferably contain
preferred
preventing
preventing clathrate
process
processing
processing industry
production
repeating
repeating unit
repeating units
representative
repulsion
ring-containing
rings
serious
seven
six
steric
susceptible
systems
transportation
units
useful
vinyl alkyl