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| Number | Title | Issue Date |
| 6028236 | Process for slowing the growth and/or agglomeration of hydrates in a production effluent The process for slowing the growth and/or agglomeration of hydrates in a fluid comprising water and gases comprises adding gas hydrate growth and/or agglomeration inhibitors comprising an essentially water soluble polymer, characterized by a total number ... | 02/22/2000 |
| 6028233 | Method for inhibiting hydrate formation A method for inhibiting the formation of clathrate hydrates in a fluid having hydrate forming constituents is claimed. More specifically, the method can be used in treating a petroleum fluid stream such as natural gas conveyed in a pipe to inhibit the for... | 02/22/2000 |
| 6028234 | Process for making gas hydrates The present invention provides a process for continuously producing clathrate hydrate. This process includes comprising the steps of: (a) pressurizing a hydrate-forming gas to an elevated pressure and cooling the hydrate-forming gas below the gas-water-hydrate... | 02/22/2000 |
| 6015929 | Gas hydrate anti-agglomerates This invention is directed toward a method for inhibiting the formation (nucleation, growth and agglomeration) of clathrate hydrates. The method comprises adding into a mixture of hydrate forming substituents and water, an effective amount of a hydrate an... | 01/18/2000 |
| 5981816 | Method for inhibiting or retarding hydrate formation or agglomeration in a production effluent The inhibiting or retarding hydrate formation, growth and/or agglomeration in a fluid comprising water and gases, is accomplished by addition of at least one hydrosoluble homopolymer or copolymer derived from at least one nitrogen-containing monomer selec... | 11/09/1999 |
| 5877361 | Process for recycling a dispersing additive used for the transportation of a condensate gas or of an oil with associated gas in the presence of hydrates A process for transporting a fluid in a pipe under conditions where hydrates may form. In the process, the pipe fluid contains at least one of a gaseous hydrocarbon or liquid hydrocarbon and water and the water content is less than the liquid hydrocarbon ... | 03/02/1999 |
| 5874660 | Method for inhibiting hydrate formation A method for inhibiting the formation of clathrate hydrates in a fluid having hydrate forming constituents is disclosed. More specifically, the method can be used in treating a petroleum fluid stream such as natural gas conveyed in a pipe to inhibit the f... | 02/23/1999 |
| 5841010 | Surface active agents as gas hydrate inhibitors This invention is directed toward a method for inhibiting the formation (nucleation, growth and agglomeration) of clathrate hydrates. The method comprises adding into a mixture comprising hydrate forming substituents and water, an effective amount of a hy... | 11/24/1998 |
| 5817898 | Process for inhibiting or retarding the formation, growth and/or aggregation of hydrates in production effluents A process is described for retarding or inhibiting the growth and/or aggregation of hydrates in production effluents comprising water and a gas under thermodynamic conditions in which hydrates can form, characterized in that a low concentration (0.05% to ... | 10/06/1998 |
| 5789635 | Method for inhibiting or retarding hydrate formation, growth and/or agglomeration The invention concerns a process for inhibiting or retarding hydrate formation, growth and/or agglomeration in a fluid comprising water and gases, by addition of a hydrosoluble copolymer which does not contain a heterocycle but contains at least one sulph... | 08/04/1998 |
| 5744665 | Maleimide copolymers and method for inhibiting hydrate formation Novel maleimide copolymers have at least two monomeric units, a maleimide unit and a vinyl unit having a pendant group, the pendant group having two to twenty-one carbon atoms, at least one nitrogen atom and at least one oxygen atom. The copolymer has an ... | 04/28/1998 |
| 5639925 | Additives and method for controlling clathrate hydrates in fluid systems 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, transportat... | 06/17/1997 |
| 5600044 | Method for inhibiting hydrate formation A method for inhibiting the formation of clathrate hydrates in a fluid having hydrate forming constituents is disclosed. More specifically, the method can be used in treating a petroleum fluid stream such as natural gas conveyed in a pipe to inhibit the f... | 02/04/1997 |
| 5434323 | Method for reducing the agglomeration tendency of hydrates in production effluents The invention relates to a process for reducing the agglomeration tendency of hydrates within a fluid containing water and gas by adding a nonionic, amphiphilic compound obtained by reacting at least one polyalkenylsuccinic anhydride or acid with a polyet... | 07/18/1995 |
| 5244878 | Process for delaying the formation and/or reducing the agglomeration tendency of hydrates A process for delaying the formation and/or reducing the agglomeration tendency of hydrates in conditions under which a hydrate may be formed, these hydrates being formed from water and gas. The process according to the invention wherein, in particular, an add... | 09/14/1993 |
| 4973775 | Process for delaying the formation and/or reducing the agglomeration tendency of hydrates The invention concerns a process for delaying the formation and/or reducing the agglomeration tendency of hydrates in conditions under which a hydrate may be formed, these hydrates being formed from water and gas. The process according to the invention wh... | 11/27/1990 |
| 4972775 | Electrostatic passive proximity fuzing system A proximity fuzing system for missile warhead utilizes an electrostatic probe to detect the electric field inherently associated with an airborne target. The probe plates are oriented perpendicular to the missile longitudinal axis and are short circuit lo... | 11/27/1990 |
| 4602920 | Process for inhibiting hydrates with inorganic electrolytes while producing moist CO2 from subterranean reservoirs In producing CO2 from subterranean reservoirs at conditions apt to cause both aqueous and CO2 -rich liquid phases to flow in pipes conveying the fluid, the formation of hydrates is prevented by adding a specified type of inorganic el... | 07/29/1986 |
| 4597779 | Process for inhibiting hydrates while producing moist CO2 from subterranean reservoirs In producing CO2 from subterranean reservoirs at conditions apt to cause two-phase flow in pipes conveying the fluid, the formation of hydrates is prevented by adding a polyhydric alcohol hydrate inhibitor in proportions capable of maintaining ... | 07/01/1986 |
| 4042011 | Refrigeration control A first fluid stream is cooled by passage through two heat exchange zones in sequence in countercurrent flow with a second fluid stream, a part of the second stream being bypassed around the second zone and passed through the first heat exchange zone and ... | 08/16/1977 |
| 4014667 | Antifreeze recovery system Antifreeze agents such as methanol used in treating hydrocarbon-containing streams to prevent the formation of hydrates and ice are recovered in a combination process comprising extraction, fractionation, and stripping together with a common reboiler syst... | 03/29/1977 |
