Abstract: Disclosed are systems and methods for increasing pressure of fluid from a low-pressure (LP) subsea fluid source. Fluid from the LP subsea fluid source is directed to a suction fluid inlet in an eductor at a subsea location. A fluid from a high-pressure (HP) subsea fluid source is directed to a motive fluid inlet in the eductor. An outlet in the eductor discharges a fluid stream having a pressure higher relative to the low-pressure fluid stream. The LP and HP sources can be subsea wells from which oil and gas are produced. The LP and HP sources can be subsea flowline systems through which oil and gas are transported. The LP and HP sources can be fluids to be compressed and compressed fluids, respectively.

Abstract: Systems and methods use a glycol solution for inhibiting formation of hydrates in a flowline. The solution forms a mixture with the produced water thereby inhibiting the formation of natural gas hydrates in the flowline. After a period of use, a rich glycol solution forms which is then regenerated by heat in a heating means such as a reboiler located at a receiving facility, resulting in a lean glycol solution suitable for use inhibiting the formation of natural gas hydrates. The concentration of the lean glycol solution is varied based on input parameters selected from operating conditions of the fluid handling system to ensure that a required concentration of the lean glycol solution is met, as determined by a processor. A control means controls the lean glycol concentration using lean glycol temperature, lean glycol concentration and/or a duty of the heating means as a control variable.

Abstract: Disclosed are methods and systems for reducing the risk of oxidation of hydrate inhibitors such as monoethylene glycol used to prevent the formation of hydrates in fluid handling systems including flow lines and pipelines. A hydrate inhibitor storage tank in fluid communication with the fluid handling system is used to hold a volume of liquid hydrate inhibitor, a volume of blanket gas and a layer of a liquid, nonflammable at operating conditions, therebetween. The liquid is immiscible with glycol.

Abstract: Disclosed are methods and systems for reducing the risk of oxidation of hydrate inhibitors such as monoethylene glycol used to prevent the formation of hydrates in fluid handling systems including flow lines and pipelines. A hydrate inhibitor storage tank in fluid communication with the fluid handling system is used to hold a volume of liquid hydrate inhibitor and a volume of high purity argon as a blanket gas.

Abstract: Disclosed are methods and systems for reducing the risk of oxidation of hydrate inhibitors such as monoethylene glycol used to prevent the formation of hydrates in fluid handling systems including flow lines and pipelines. A hydrate inhibitor storage tank in fluid communication with the fluid handling system is used to hold a volume of liquid hydrate inhibitor and a volume of high purity argon as a blanket gas.

Abstract: Disclosed are methods and systems for reducing the risk of oxidation of hydrate inhibitors such as monoethylene glycol used to prevent the formation of hydrates in fluid handling systems including flow lines and pipelines. A hydrate inhibitor storage tank in fluid communication with the fluid handling system is used to hold a volume of liquid hydrate inhibitor, a volume of blanket gas and a layer of a liquid, nonflammable at operating conditions, therebetween. The liquid is immiscible with glycol.