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

• Disposal Route - Compliance with Regulations

• Scotoil - Oilfield Environmental Services

Equipment Decontamination Procedure Step by Step, Cairo

QUESTIONS ?

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

• 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 14001

• FPAL

• Scotland’s Health at Work Gold Award

OUR CREDENTIALS

OUR CLIENTS

• Equipment decontamination

• Removal and disposal of NORM

• Instrumentation

• Onshore and offshore RPS

• Emerging technologies in water purification and land remediation

OUR SERVICES

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

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

INSTRUMENTATION SERVICES

• Scotoil Services offers a complete radiological instrumentation package:

Equipment training Sales Rental Repair Calibration Certification

ELECTRA CONTAMINATION METERMINI 900 SERIES MONITOR

RPS SERVICES

• Radiological surveys

• RPS control during workovers etc.

• Induction training

• Personnel monitoring

• Documentation

• Supply of appropriate PPE

• 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

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

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

• 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

• 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’

• Radiation dose

• Inhalation

• Ingestion

• Cuts and abrasions

THE HAZARDS

VALVE

VALVE

MISCELLANEOUS VALVES

VALVES & ACTUATORS

PIPEWORK

HEAT EXCHANGER

HEAT EXCHANGER CLEANED & DE-SCALED

OIL COOLER PLATES

LOOSE SCALE

PERFORATED TUBING - INTERNAL & EXTERNAL CONTAMINATION

PUMP IMPELLER ASSEMBLY

DOWNHOLE ESP PUMP - STRIPPED DOWN

DOWNHOLE ESP PUMP PARTS - DIFFUSERS & IMPELLERS

ESP PUMP DIFFUSERS

MECHANICAL SEALS & DOWNHOLE SAFETY VALVE

XMAS TREES

CASING

PITTED TUBULAR

SPIRAL SCALE

EQUIPMENT DECONTAMINATION PROCEDURE

Step by Step

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

• Unload equipment into Controlled Area

• Enter job details on computerised Job Register

• Scale sample passed to Laboratory

• Radiological analysis, total activity, type of scale

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

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

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

Tubular Decontamination System

• High Pressure jetting combined with lance mounted cutter ‘Rattler head’

Tubular Ends - Fully Enclosed Hoods

• All Scale & cleaning water collected to sump

Tubular Ends - Fully Enclosed Hoods

Lance Mounted Cutter Head‘Rattler’

• Machine with hardened cutting surfaces

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

• 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

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)

Davidson House, Miller Street, Aberdeen, AB11 5AN, Scotland, UK

Telephone +44 (0) 1224 571491 Fax +44 (0) 1224 580861

enquiries@scotoil.co.uk www.scotoil.co.uk

DECONTAMINATION PROCESS DECONTAMINATION PROCESS FOR NORM FOR NORM

CONTAMINATED OILFIELD CONTAMINATED OILFIELD EQUIPMENTEQUIPMENT

6th OCTOBER CITY - EGYPT6th OCTOBER CITY - EGYPT

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.

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.

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

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

THE ACCESSIBLE SURFACES ARE PRE-CLEANED PRIOR TO DISMANTLING.

THE EQUIPMENT IS DISMANTLED BY EITHER OES PERSONNELOR A SPECIALIST THIRD PARTY;

RADIOLOGICALLY SUPERVISED BY OES.

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

THE BREAKDOWN AREA IS DECONTAMINATED, FLUSHING ALLCONTAMINENTS INTO THE CLOSED LOOP DRAINAGE AND

FILTRATION SYSTEM.

EACH PART IS INDIVIDUALLY DECONTAMINATED

BY MEANS OF…..

STATE OF THE ART UHP WATER JETTING EQUIPMENT.

RESULTING RADIOACTIVE WASTE IS COLLECTED INA CLOSED LOOP SIX STAGE FILTRATION AND

WATER RECYCLING SYSTEM.

FOLLOWING DECONTAMINATION, EQUIPMENT IS MONITOREDAND SURVEYED FOR VISUAL SCALE. IF ACCEPTED, INTERIM

CHECK TAPE IS ATTACHED TO THE EQUIPMENT.

EQUIPMENT IS NOW MONITORED BY A HEALTH PHYSICISTAT THE QUALITY CONTROL STAGE.

FOLLOWING ACCEPTANCE BY THE QC DEPARTMENT AND CLIENT, THE EQUIPMENT IS SUITABLY WRAPPED AND EITHER

BOXED, PALLETISED OR RETURNED TO ITS ORIGINAL CONTAINER.

THE EQUIPMENT IS CLEAN, SAFE, CERTIFIED AND READY FORCUSTOMER UPLIFT.

THE FILTRATION SYSTEM IS CLEANED, TRANSFERRING ALLWASTE TO THE CLIENTS NORM STORAGE CONTAINER.

THE ENTIRE CONTROLLED AREA IS SURVEYED BY A QUALIFIEDHEALTH PHYSICIST TO ENSURE THAT IT IS FREE OF

CONTAMINATION.

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.

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

QUESTIONS?