Additives and method for controlling clathrate hydrates in fluid systems

Patent · Wed Jan 01 00:00:00 EST 1997

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

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