Schlumberger Technology Corporation

Daniel Sack

Dominic McCann

Morten Stenhaug

A method of monitoring a subsea pipeline system connecting one or more wells to a floating production system, wherein the pipeline system is at least partially flexible, the method comprises installing a continuous optical fiber distributed sensor as part of the pipeline system, the sensor capable of providing a distributed measurement of temperature, vibration, pressure or strain, or any combination thereof; using the sensor to obtain a distributed measurement of temperature, vibration, pressure and/or strain along at least part of the pipeline system indexed to a length thereof; and using the distributed measurement to predict the actual condition of the fluid, the pipeline system and/or the adjacent sea water using a model. A subsea pipeline system for connecting one or more wells to a floating production system, wherein the pipeline system comprises at least one partially flexible pipeline; a continuous optical fiber distributed sensor installed as part of the pipeline capable of providing a distributed measurement of temperature and/or strain; means for obtaining a distributed measurement of temperature, vibration or strain, or combinations thereof, along at least part of the pipeline system indexed to a length thereof from the sensor; and means for using the distributed measurement to manage operation of the system. Preferably, the system comprises means for modelling expected pipeline behavior using the distributed measurement as an input; and means for using the modelled behavior to manage operation of the system.

Monitoring system for pipelines or risers in floating production installations

A method, system and apparatus for deploying a subsea well intervention system from a surface vessel to a subsea tree, including connecting a spoolable compliant guide (SCG) to a subsea intervention package; testing the connection; lowering overboard the intervention package into a water column using a primary lifting device; gradually paying out the SCG from a reel thereof as the intervention package is lowered to a seabed; transferring the weight of the intervention package to a secondary lifting device, wherein the intervention package functions as a dead weight to overcome a positive buoyancy of the SCG, a distance between the primary and secondary lifting devices creates and controls a shape of the SCG; and once landed onto a subsea tree with heave compensation, disconnecting the secondary lifting device from the intervention package, and hanging the SCG off at the vessel at deck level.

Growing community of inventors

Perth WA, Australia

Daniel Sack