Method, device, and system for determining water or liquid in the annulus of a flexible riser or flowline

摘要

A method, device, and system for determining whether liquid enters a subsea system includes a flow line having an inside bore capable of carrying producing fluids from a subsea wellhead to a floating production storage and offloading vessel (FPSO). An annulus is defined between an innermost sheath that surrounds the inside bore and an outermost sheath at an exterior of the flow line. The device further includes a housing element disposed within the annulus and in hydraulic communication with the annulus; a sensor element disposed at a predetermined location within the housing element; and data acquisition equipment capable of: determining environmental characteristics of the annulus based on measurements made by the sensor element, and determining at least one of the presence, location, and rate of collection of liquids in the subsea system based on the environmental characteristics of the annulus.

主权项

1. A device for determining whether liquid enters a subsea system, the device comprising:
a flow line comprising an inside bore capable of carrying producing fluids from a subsea wellhead to a floating production storage and offloading vessel (FPSO), wherein an annulus is defined between an innermost sheath that surrounds the inside bore and an outermost sheath at an exterior of the flow line; a housing element comprising an open-ended tube disposed within and along the length of the annulus and in hydraulic communication with the annulus; a sensor element disposed within and along the length of the open-ended tube; and data acquisition equipment capable of:
determining environmental characteristics of the annulus based on measurements made by the sensor element, anddetermining at least one of the presence, location, and rate of collection of liquids in the subsea system based on the environmental characteristics of the annulus.