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

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Presentation on theme: "Norm Workshop (Pdo - Oman) 21 - 24 February 2005 TIM ELEY - SCOTOIL GROUP plc, ABERDEEN MARK RITCHIE - OES, CAIRO, EGYPT."— Presentation transcript:

1 Norm Workshop (Pdo - Oman) 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 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 INTERNATIONAL

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

5 OUR CLIENTS

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

7 EQUIPMENT DECONTAMINATION 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

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

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

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

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

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

13 DOSE RATES Measured in sieverts { large unit} - usually prefix sub multiplier e.g.1 µSv {micro sievert} 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 NORM scale build up can render equipment inoperable Classed as radioactive, its removal and disposal must be carefully controlled WHAT IT MEANS FOR THE INDUSTRY

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

16 Radiation dose Inhalation Ingestion Cuts and abrasions THE HAZARDS

17 VALVE

18

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

37 EQUIPMENT DECONTAMINATION PROCEDURE Step by Step

38 EQUIPMENT DECONTAMINATION 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

39 Unload equipment into Controlled Area Enter job details on computerised Job Register

40 Scale sample passed to Laboratory Radiological analysis, total activity, type of scale

41 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

42 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

43 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

44 Tubular Decontamination System High Pressure jetting combined with lance mounted cutter ‘Rattler head’

45 Tubular Ends - Fully Enclosed Hoods All Scale & cleaning water collected to sump

46 Tubular Ends - Fully Enclosed Hoods

47 Lance Mounted Cutter Head ‘Rattler’ Machine with hardened cutting surfaces

48 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

49 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

50 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)

51 Davidson House, Miller Street, Aberdeen, AB11 5AN, Scotland, UK Telephone +44 (0) Fax +44 (0) DECONTAMINATION PROCESS FOR NORM CONTAMINATED OILFIELD EQUIPMENT 6th OCTOBER CITY - EGYPT

52 Oilfield Environmental Services is a joint Venture company between Scotoil (UK) and Minaoil (Egypt). Scotoil, bringing 20 years of North Sea NORM decontamination experience and Minaoil, bringing 20 years of Egyptian oil and gas industry expertise joined forces in 2001 to combat the NORM problem in Egypt. Oilfield Environmental Services was formed and is now operational and fully licensed by the Egyptian Authorities including EGPC, AEA, MOE and GAFI.

53 The following presentation, details the basic decontamination process of NORM contaminated equipment at Oilfield Environmental Services decontamination facility, situated in 6th October City, Egypt. For the purpose of this presentation we will follow a contaminated ESP and resulting waste from arrival at OES until the equipment is despatched to the client in a safe, certified and contamination free state.

54 ON ARRIVAL, THE CONTAMINATED ITEM IS OFFLOADED AND DIRECTED TO OES RADIATION CONTROLLED AREA.

55 THE EQUIPMENT IS ALLOCATED AN OES JOB NUMBER, MONITORED AND TAGGED.

56 THE ACCESSIBLE SURFACES ARE PRE-CLEANED PRIOR TO DISMANTLING.

57 THE EQUIPMENT IS DISMANTLED BY EITHER OES PERSONNEL OR A SPECIALIST THIRD PARTY; RADIOLOGICALLY SUPERVISED BY OES.

58 EACH PART IS GIVEN AN INDIVIDUAL IDENTIFICATION NUMBER, MONITORED AND TAGGED.

59 THE BREAKDOWN AREA IS DECONTAMINATED, FLUSHING ALL CONTAMINENTS INTO THE CLOSED LOOP DRAINAGE AND FILTRATION SYSTEM.

60 EACH PART IS INDIVIDUALLY DECONTAMINATED BY MEANS OF…..

61 STATE OF THE ART UHP WATER JETTING EQUIPMENT.

62 RESULTING RADIOACTIVE WASTE IS COLLECTED IN A CLOSED LOOP SIX STAGE FILTRATION AND WATER RECYCLING SYSTEM.

63 FOLLOWING DECONTAMINATION, EQUIPMENT IS MONITORED AND SURVEYED FOR VISUAL SCALE. IF ACCEPTED, INTERIM CHECK TAPE IS ATTACHED TO THE EQUIPMENT.

64 EQUIPMENT IS NOW MONITORED BY A HEALTH PHYSICIST AT THE QUALITY CONTROL STAGE.

65 FOLLOWING ACCEPTANCE BY THE QC DEPARTMENT AND CLIENT, THE EQUIPMENT IS SUITABLY WRAPPED AND EITHER BOXED, PALLETISED OR RETURNED TO ITS ORIGINAL CONTAINER.

66 THE EQUIPMENT IS CLEAN, SAFE, CERTIFIED AND READY FOR CUSTOMER UPLIFT.

67 THE FILTRATION SYSTEM IS CLEANED, TRANSFERRING ALL WASTE TO THE CLIENTS NORM STORAGE CONTAINER.

68 THE ENTIRE CONTROLLED AREA IS SURVEYED BY A QUALIFIED HEALTH PHYSICIST TO ENSURE THAT IT IS FREE OF CONTAMINATION.

69 WHEN EITHER THE QUANTITY OF NORM WASTE OR THE DOSE RATE HAS EXCEEDED A CERTAIN LEVEL, OES REQUEST THAT THE CLIENT AND THE EGYPTIAN ATOMIC ENERGY REMOVE THE WASTE FROM OES. THE SECURED CONTAINERS ARE TRANSFERRED BY SPECIALISED AEA TRANSPORTATION FOR FINAL DISPOSAL.

70 AT THE TIME OF EQUIPMENT DESPATCH, A FULL REPORT IS SUBMITTED TO THE CLIENT WITH ALL RELEVANT DOCUMENTATION. THIS TYPICALLY INCLUDES : -EQUIPMENT / PART RECORDS -WORK SUMMARY -DISMANTLING DETAILS -RADIATION ANALYSIS RESULTS FROM EACH STAGE IN THE PROCESS -RADIATION SUMMARY -QC DOCUMENTATION -NORM WASTE DATA -DECONTAMINATION CERTIFICATE

71

72 QUESTIONS?


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