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 Internal inspection tool capable of

Detecting corrosion and deformationDetecting corrosion and deformation

Anomalies including dents, gougesAnomalies including dents, gouges

and groovesand grooves

Necessary considerations

• CleaningCleaning Remove internally for old deposits of sands, wax and Remove internally for old deposits of sands, wax and

sediments.sediments.

• Restrictions identificationsRestrictions identifications No impacts to crude oil transport programNo impacts to crude oil transport program No receiver trap installedNo receiver trap installed No environmental impactsNo environmental impacts

• Inspection metal loss with a High Resolution ToolInspection metal loss with a High Resolution Tool Sizing and location accuracy. GPS location. Detection of Sizing and location accuracy. GPS location. Detection of

anomalies on weldsanomalies on welds

Necessary considerations

• Identification and location of mechanical anomaliesIdentification and location of mechanical anomalies Identify, locate and size dents,ovality, wrinkles, deformations.Identify, locate and size dents,ovality, wrinkles, deformations. Identify possible defects in the pipe were the intelligent tool could Identify possible defects in the pipe were the intelligent tool could

be stuck.be stuck.

• Processing and analyze dataProcessing and analyze data Review the data, identify defects, prioritize and define plan to go Review the data, identify defects, prioritize and define plan to go

forward.forward. Anomalies assessment according B31G and R StrengAnomalies assessment according B31G and R Streng

• Finding’s repairs .Finding’s repairs . Data validation and repairs according with the report and priorityData validation and repairs according with the report and priority

Inspection and cleaning technology

• CleaningCleaning

– GelGel– ConventionalConventional– BiDiBiDi

• InspectionInspection

– UmbilicalUmbilical– Conventional Conventional – BiDiBiDi

ILI Background

• Contacts with operators with Offshore In Line Contacts with operators with Offshore In Line Inspection experience Inspection experience

• In Line inspection vendors In Line inspection vendors • Risk Assessment In Line Inspection TechnologiesRisk Assessment In Line Inspection Technologies

Technologies AssessmentTechnologies Assessment• Risk Assessment for Receiver Trap installationRisk Assessment for Receiver Trap installation

Facilities required, trap mobilization and Facilities required, trap mobilization and installation, environmental impactsinstallation, environmental impacts

• Risk Assessment for OperationRisk Assessment for Operation Submarine valves, flow backward, use tanker Submarine valves, flow backward, use tanker

storagestorage

ILI Background

• Risk Assessment Pigging Risk Assessment Pigging Quality of cleaning, pigging alternatives Quality of cleaning, pigging alternatives

evaluation, pigging program designevaluation, pigging program design• Discussion about procedures, logistics and Discussion about procedures, logistics and

equipments required equipments required Operation, transport, control center, Operation, transport, control center,

maintenance, environmental, Terminal and maintenance, environmental, Terminal and integrity.integrity.

• Final Risk Assessment to define best ILI and Final Risk Assessment to define best ILI and pigging alternative with all areas.pigging alternative with all areas.

Selected ILI technology

• Bidirectional Tool.Bidirectional Tool.• No required receiver trap installation.No required receiver trap installation.• High Resolution Tool.High Resolution Tool.• High number and density of sensors, High number and density of sensors,

accuracy.accuracy.• Classification ID/OD discrimination.Classification ID/OD discrimination.• Boxing,clustering and interaction analysis.Boxing,clustering and interaction analysis.

Selected ILI technology

• Metal loss correlation with mechanical Metal loss correlation with mechanical anomalies.anomalies.

• Excellent accuracy and probability of Excellent accuracy and probability of detection.detection.

• Sizing Accuracy( Manual and Auto)Sizing Accuracy( Manual and Auto)• Anomalies location with (GPS)Anomalies location with (GPS)• Inspection coverage (100%)Inspection coverage (100%)• Interpretation and assessment of dataInterpretation 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

ta nker

m ooringb ouy

p ip e line endm a nifo ld

–Thanks for your attention