Chevron U.s.a. Inc.

Ahmed F Omar

Antonio C F Critsinelis

Christopher Allen Kassner

Farzan Parsinejad

Miguel Ruiz

Rick Marshall

Arif Shipchandler

Disclosed are methods, systems and apparatus for circulating fluid within the annulus of a flexible pipe used in a riser in an offshore hydrocarbon production facility. Fluid, such corrosion inhibitors, can be introduced into the annulus by pumping fluid from a storage tank located on a platform or vessel into tubes within the annulus. Use of the system to flow the fluid through the annulus can prevent or reduce corrosion of the steel members within the annulus and increase the fatigue life of the riser.

Methods, systems and apparatus for circulating fluid within the annulus of a flexible pipe riser

A process and system for directly exporting liquefied petroleum gas (LPG) from an offshore location is disclosed. The process comprises (a) obtaining a mixture comprising oil and natural gas from a subsea well; (b) separating LPG from the mixture comprising oil and natural gas at a floating or fixed offshore processing facility; (c) offloading the LPG directly from the floating or fixed offshore processing facility via subsea offloading risers and at least one subsea offloading flowline connecting the processing facility to a floating or fixed offshore transfer station; and (d) transferring the LPG to an export tanker at the transfer station. The system comprises a floating or fixed offshore processing facility, a floating or fixed offshore transfer station, and a set of subsea offloading transfer lines connecting the processing facility and the transfer station.

Method and system for offshore export and offloading of LPG

Disclosed is a process and system for circulating fluid within the annulus of a flexible pipe used in a riser in an offshore hydrocarbon production facility. Fluid, such as corrosion inhibitors, can be circulated in a closed loop which includes the annulus of the riser terminating at a platform or floating vessel, a fluid storage tank located on the platform or vessel and an umbilical tube terminating at the platform or vessel and at a subsea location. Use of the system to flow the fluid through the annulus can prevent or reduce corrosion of the steel members within the annulus and increase the fatigue life of the riser.

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Katy, TX, United States of America

Ahmed F Omar