Transcript BEB-Layout
3P Services, Germany Basil Hostage The missing link – inspecting the final critical section of a large crude transmission and export system DGMK-Vortrag 30.04.1999 • In-line inspection • since 1992 • MFL • world wide • initially specialized on small diameter tools (4“ to 10“) • today 3“ to 42“ … Ocensa‘s offshore pipeline Ocensa‘s offshore pipeline Integrity assessment selected by Ocensa Internal inspection tool capable of Detecting corrosion and deformation Anomalies including dents, gouges and grooves Necessary considerations • Cleaning Remove internally for old deposits of sands, wax and sediments. • Restrictions identifications No impacts to crude oil transport program No receiver trap installed No environmental impacts • Inspection metal loss with a High Resolution Tool Sizing and location accuracy. GPS location. Detection of anomalies on welds Necessary considerations • Identification and location of mechanical anomalies Identify, locate and size dents,ovality, wrinkles, deformations. Identify possible defects in the pipe were the intelligent tool could be stuck. • Processing and analyze data Review the data, identify defects, prioritize and define plan to go forward. Anomalies assessment according B31G and R Streng • Finding’s repairs . Data validation and repairs according with the report and priority Inspection and cleaning technology • Cleaning – Gel – Conventional – BiDi • Inspection – Umbilical – Conventional – BiDi ILI Background • • • • • Contacts with operators with Offshore In Line Inspection experience In Line inspection vendors Risk Assessment In Line Inspection Technologies Technologies Assessment Risk Assessment for Receiver Trap installation Facilities required, trap mobilization and installation, environmental impacts Risk Assessment for Operation Submarine valves, flow backward, use tanker storage ILI Background • • • Risk Assessment Pigging Quality of cleaning, pigging alternatives evaluation, pigging program design Discussion about procedures, logistics and equipments required Operation, transport, control center, maintenance, environmental, Terminal and integrity. Final Risk Assessment to define best ILI and pigging alternative with all areas. Selected ILI technology • • • • • • Bidirectional Tool. No required receiver trap installation. High Resolution Tool. High number and density of sensors, accuracy. Classification ID/OD discrimination. Boxing,clustering and interaction analysis. Selected ILI technology • • • • • • Metal loss correlation with mechanical anomalies. Excellent accuracy and probability of detection. Sizing Accuracy( Manual and Auto) Anomalies location with (GPS) Inspection coverage (100%) Interpretation and assessment of data Ocensa‘s work scope • • • • Max preparation for cleaning MFL, GEO and XYZ Complete tracking and markering Safe navigation near the PLEM • = the full program Project conclusion • Issues to be covered • • • • • • • Contract Technical planning Logistics Job execution Data analysis & reporting Verification Very ambitious time schedule Project conclusion • How could this work? – OCENSA: large pipeline operator – 3P Services: small contractor, far away Answers • Careful technology analysis and decision by OCENSA • Contract: OCENSA respected 3P‘s specific needs • High flexibility of 3P Services, since small • OCENSA made systematic use of 3P‘s experience • High professional skills of the individuals involved Markers and antennae Pig launcher Coveñas BiDi cleaning pig Launching the GEO tool 42“ MFL tool Vertical profile of land section Pig speed profile Pig recorded pressure profile • Bi-directional MFL applications tanker mooring bouy pipeline end manifold –Thanks for your attention