Claims
- 1. A method of preventing or retarding the formation of gas hydrates or for reducing the tendency of gas hydrates to agglomerate, during the transport of a fluid comprising water and a hydrocarbon through a conduit which comprises adding the composition consisting essentially of, by weight (a) 20-50% based on the total composition of a polymer or copolymer selected from the group consisting of (1) a terpolymer of 17-32% by weight vinyl pyrrolidone, 65-80% by weight vinyl caprolactam and 3-6% by weight of an ammonium derivative monomer having from 6 to 12 carbon atoms selected from the group consisting of a dialkyl aminoalkyl methacrylamide, a dialkyl dialkenyl ammonium halide and a dialkylamino alkyl acrylate or methacrylate, (2) a copolymer of vinyl pyrrolidone and vinyl caprolactam, and (3) a homopolymer of vinyl caprolactam, and (b) the rest of the composition being an alcohol containing one hydroxy group and having 3 to 5 carbon atoms selected from the group consisting of propyl alcohol, sec-butyl alcohol, n-butyl alcohol, tert-butyl alcohol, isopropyl alcohol and 1-pentanol in an amount of 0.1 to 3% by weight of the water in said fluid.
- 2. The method according to claim 1 wherein said terpolymer includes an ammonium derivative monomer which is dimethylaminoethyl methacrylate.
- 3. The method according to claim 1 wherein said polymer is a homopolymer of vinyl caprolactam.
- 4. The method according to claim 1 wherein said copolymer comprises vinyl pyrrolidone and vinyl caprolactam.
Parent Case Info
This is a division of application Ser. No. 09/168,981, filed on Oct. 7, 1998 which is a continuation-in-part of Ser. No. 08/910,128, filed on Aug. 13, 1997 (now abandoned).
This application is a continuation-in-part application of Ser. No. 08/910,128, filed Aug. 13, 1997 abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
5639925 |
Sloan, Jr. et al. |
Jun 1997 |
|
5723524 |
Cohen et al. |
Mar 1998 |
|
5874660 |
Colle et al. |
Feb 1999 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
168981 |
Oct 1998 |
|
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
910128 |
Aug 1997 |
|