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This presentation addresses the critical aspects of pipeline integrity assessment, focusing on Ocensa's offshore pipeline. It covers advanced in-line inspection (ILI) technologies responsible for detecting corrosion and deformities. The discussion highlights necessary considerations for cleaning, data analysis, and damage assessment, including mechanical anomalies. The selected ILI methods emphasize high-resolution tools and bidirectional capabilities, ensuring effective anomaly detection without impacting crude oil transport schedules. This comprehensive approach aims to enhance pipeline safety and efficiency.
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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“ …
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 preparationforcleaning • MFL, GEO and XYZ • Completetrackingandmarkering • Safe navigationnearthe PLEM • = thefullprogram
Project conclusion • Issuestobecovered • Contract • Technical planning • Logistics • Job execution • Data analysis & reporting • Verification • Veryambitious time schedule
Project conclusion • Howcouldthiswork? • OCENSA: large pipelineoperator • 3P Services: smallcontractor, faraway
Answers • Carefultechnologyanalysisanddecisionby OCENSA • Contract: OCENSA respected 3P‘s specificneeds • High flexibilityof 3P Services, sincesmall • OCENSA madesystematicuseof 3P‘s experience • High professional skillsofthe individuals involved
