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Norm Workshop (Pdo - Oman) 21 - 24 February 2005 TIM ELEY - SCOTOIL GROUP plc, ABERDEEN

Norm Workshop (Pdo - Oman) 21 - 24 February 2005 TIM ELEY - SCOTOIL GROUP plc, ABERDEEN MARK RITCHIE - OES, CAIRO, EGYPT. AGENDA Introduction to Scotoil Group & Scotoil Services Equipment subject to NORM - ‘Rogue’s Gallery’ Equipment Decontamination Procedure Step by Step, Aberdeen

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Norm Workshop (Pdo - Oman) 21 - 24 February 2005 TIM ELEY - SCOTOIL GROUP plc, ABERDEEN

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  1. Norm Workshop (Pdo - Oman) 21 - 24 February 2005 TIM ELEY - SCOTOIL GROUP plc, ABERDEEN MARK RITCHIE - OES, CAIRO, EGYPT

  2. AGENDA • Introduction to Scotoil Group & Scotoil Services • Equipment subject to NORM - ‘Rogue’s Gallery’ • Equipment Decontamination Procedure Step by Step, Aberdeen • Disposal Route - Compliance with Regulations • Scotoil - Oilfield Environmental Services Equipment Decontamination Procedure Step by Step, Cairo QUESTIONS ?

  3. EUROPE Scotoil Group plc headquarters in Aberdeen, Scotland INTERNATIONAL MIDDLE EAST Alliance between Scotoil Services (Middle East) Ltd and Gulf Environmental Company LLC (GENCO), based in Abu Dhabi, UAE NORTH AFRICA Oilfield Environmental Services (OES) - JV company based in Cairo, Egypt

  4. More than 20 years’ experience OUR CREDENTIALS • SCOAA Environment award recognising “world class standards” • Operations meet exacting standards of regulatory and assessment bodies • ISO 9001:2000, ISO 14001 • FPAL • Scotland’s Health at Work Gold Award

  5. OUR CLIENTS

  6. Equipment decontamination OUR SERVICES • Removal and disposal of NORM • Instrumentation • Onshore and offshore RPS • Emerging technologies in water purification and land remediation

  7. High Pressure Generally for component parts and tubulars • Ultra High Pressure - Trials More efficient tubular cleaning Increased throughput More effective cleaning of lead contaminated tubulars EQUIPMENT DECONTAMINATION

  8. Disposal facility regulated by SEPA REMOVAL AND DISPOSAL OF NORM • UK’s first authorised NORM removal and disposal facility • Environment controls through independent impact assessments and monitoring • Accountability - operational controls and licensed disposal route

  9. INSTRUMENTATION SERVICES • Scotoil Services offers a complete radiological instrumentation package: • Equipment training • Sales • Rental • Repair • Calibration • Certification MINI 900 SERIES MONITOR ELECTRA CONTAMINATION METER

  10. Radiological surveys RPS SERVICES • RPS control during workovers etc. • Induction training • Personnel monitoring • Documentation • Supply of appropriate PPE

  11. Formation water contains naturally-occurring mineral salts WHAT IS NORM SCALE? • These salts can come out of solution in contact with injected water • Radium may be present in minute concentrations • Naturally radioactive, radium may mean the scale is classified as radioactive

  12. Specific Activity • Activity per gram i.e. Bq/gram UNITS OF MEASUREMENT • Surface Contamination • Activity per cm squaredi.e. Bq/cm2 • A contamination monitor can measure surface activity

  13. Measured in sieverts { large unit} - usually prefix sub multiplier e.g.1 µSv {micro sievert} DOSE RATES • Dose rates greater than 2.5 µSv/hr mark supervised areas • Dose rates greater than 7.5 µSv/hr mark controlled areas

  14. Naturally occurring radioactive material is a major issue for • field operation • decommissioning WHAT IT MEANS FOR THE INDUSTRY • NORM scale build up can render equipment inoperable • Classed as radioactive, its removal and disposal must be carefully controlled

  15. Colour varies from white through to brown TYPES OF EQUIPMENT SUBJECT TO NORM - ‘ROGUES GALLERY’ • Barium Sulphate scale is most common • Spongy open appearance if large quantities of scale inhibitor used

  16. Radiation dose THE HAZARDS • Inhalation • Ingestion • Cuts and abrasions

  17. VALVE

  18. VALVE

  19. MISCELLANEOUS VALVES

  20. VALVES & ACTUATORS

  21. PIPEWORK

  22. HEAT EXCHANGER

  23. HEAT EXCHANGER CLEANED & DE-SCALED

  24. OIL COOLER PLATES

  25. LOOSE SCALE

  26. PERFORATED TUBING - INTERNAL & EXTERNAL CONTAMINATION

  27. PUMP IMPELLER ASSEMBLY

  28. DOWNHOLE ESP PUMP - STRIPPED DOWN

  29. DOWNHOLE ESP PUMP PARTS - DIFFUSERS & IMPELLERS

  30. ESP PUMP DIFFUSERS

  31. MECHANICAL SEALS & DOWNHOLE SAFETY VALVE

  32. XMAS TREES

  33. CASING

  34. PITTED TUBULAR

  35. SPIRAL SCALE

  36. Step by Step EQUIPMENT DECONTAMINATION PROCEDURE

  37. Written notification from the Operator of NORM consignment • Identified offshore by platform/rig RPS • Scotoil authorised to accept contaminated equipment • Contamination levels monitored on arrival EQUIPMENT DECONTAMINATION

  38. Unload equipment into Controlled Area • Enter job details on computerised Job Register

  39. Scale sample passed to Laboratory • Radiological analysis, total activity, type of scale

  40. Arrival, Documentation Check & Inspect Tubulars - check internal, external pin, box, scale thickness, activity for each joint • Unique Job No - waterproof tag, client, location • Complete monitoring records for each item or component part • All joints capped or re-wrapped

  41. Decontamination of Equipment • Pre-cleaning prior to stripdown • Stripdown if required • Soluble abrasives can be used to assist decontamination • Full decontamination • Post, Final & QC Inspection

  42. Ultra High Pressure Pump Unit • 36,000 psi working pressure at 42 litres per minute High Pressure Aqua Pumps • 10,000 psi working pressure at 82 litres per minute

  43. Tubular Decontamination System • High Pressure jetting combined with lance mounted cutter ‘Rattler head’

  44. Tubular Ends - Fully Enclosed Hoods • All Scale & cleaning water collected to sump

  45. Tubular Ends - Fully Enclosed Hoods

  46. Lance Mounted Cutter Head ‘Rattler’ • Machine with hardened cutting surfaces

  47. All Scale ground down to less than <250 microns • All Scale passed through screens • Oil Separator - two stage • Controlled discharged to sea regulated by SEPA • Post Cleaning Monitor Record • Final Check Monitor Record

  48. Results of radiochemical analysis on computerised Job Register • Certificate of Scale Disposal - master job file • Quarterly Scale Disposal computerised records • Quarterly Sea Survey - results, particle size analysis to radiation specialists at SEPA (Scottish Environment Protection Agency) SCALE DISPOSAL

  49. Compliance with HSE Regulations • Ionising Radiation Regulations 1999 • Control of Pollution Act 1974* • Radiation Substances Act 1993 • Environmental Pollution Act 1990 • Registered under the pipeline Act 1962 • Authorisation for the Accumulation and Disposal of Radioactive Waste* * Regulated by SEPA (Scottish Environment Protection Agency)

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