Major Challenges in HPHT Operations

Survey results of a survey sent to HPHT Professionals 16 November 2010

HPHT Wells Summit 2010:

HPHTWells.com

Thank You!

To all respondents:

Thank you very much for taking your time to fill out our questionnaire.The survey aimed to assess the major challenges in HPHT activities.

We are happy to present the results of the survey.

HPHTWells.com

Which of the following would you say has the biggest technology gaps for HPHT operations?

W hich o f the fo llo wing wo uld yo u sa y ha s the b ig g e st te chno lo g y g a p s fo r HPHT o p e ra tio ns?

4%8%

8%

12%

12%

14%

8%

34%

Casing

Tubulars

Testing facilities

Safety measures

Seals

Cement design andperformance

Polymers and metallurgy

Other (please specify)

1)

HPHTWells.com

Which of the following would you say has the biggest technology gaps for HPHT operations?

Other responses:

• Drilling equipment, Mud • High temperature electronics capable of surviving 200C operation• High temperature electronics subsystems providing power to directional• Logging• MWD/LWD tools unable to perform consistently over 150 Deg C • QAQC and testing • Qualification of specialist materials • Well control. Can be mitigated using cesium format brine, but not every

company uses it - they prefer to play Russian Roulette with the lives of their rig crews

• Seismic resolution• Testing Facilities and Materials are both equally with

respect to gaps

1)

HPHTWells.com

What are the major challenges you face with equipment durability?

• BOP equipment sealing elements • Extended exposure to temperature• Equipment reliability and durability with temperature above

175 deg Celsius• Durability against high temperature• Dynamic seals• Getting equipment to be reliable under extreme conditions• Hot hole tools, Long term effect on metal / elastomers• Internal annulus unknown changes and access to monitor

and intervene• Liner hanger sealing element• Material failure due to high temperature case• Quantifying how T & P cycling effects each component of the systems

being used

2)

HPHTWells.com

What are the major challenges you face with equipment durability?

Cont’d:

• Reliability of down hole chemical injection systems.• Stress corrosion cracking caused by the halide brines used as completion,

work over and packer fluids • Surface drilling equipment and down hole drilling tools • The High Temperature limits the performance of tools so during drilling you

can optimize the cooling system in order to plan the availability of different section of job

• The increasing need for higher temperature ( 230 - 260C) electronics given ultra deep wells and geothermal wells

• The main challenges in my field relate to measurement accuracy and precision, both to achieve the required levels and maintaining the calibration through (multiple) temperature cycles.

• Wellhead hander sealing elements

2)

HPHTWells.com

What are the critical factors to consider when ensuring the electronic survivability of equipment?

• Always the High temperature but also the High Pressure that increase the possibility of leak

• Combination of down hole dynamic (shock) and temperature • Connection technology is also very important• Electronic equipment needs to be robust against higher temperatures (Step

change in technology)• Ensure that the sensor withstands the maximum temperature case • Extended exposure to temperatures above 450 f• How stable circuits can be made by resistance to extreme movement and

how well recovery can be captured due to shock and surge• Long term testing under realistic well conditions is also crucial• Material choices• Max operating temperature, max Junction temperature, availability of SOI

devices, de rating at temperature of passive competent, longevity at temperature, shock and vibration, supplier viability, Supplier commitment to Oil market & Sub systems and MCM approach

3)

HPHTWells.com

What are the critical factors to consider when ensuring the electronic survivability of equipment?

Cont’d:

• Pressure, position, fatigue testing, environment, temperature fluctuations• Pressure difference between inside and out side of the tools in high temp

environment• QAQC and testing• Remove as many unnecessary items as possible, particularly reagents

which will affect the life of the components through chemical degradation • Shock, vibration and high torque, OBM environment, Temperature and

vibration• Temperature, operating environment, Pressure and operating procedures.• Understanding of real down hole temperatures. Understanding of simulated

and measured circulation temperatures.• Voltage switching devices

3)

HPHTWells.com

Is enough being done to combat the risk of product failure at high temperatures?

Is e no ug h b e ing d o ne to co mb a t the risk o f p ro d uct fa ilure a t hig h te mp e ra ture s?

7.7%

53.8%

38.5%Yes

No

I am not sure

4)

HPHTWells.com

What are the key factors that contribute to the success of your QA/QC process?

• Adapt qualification process integrating shock loading in down hole condition

• Casing design & seals• Clear and concise quality plan that is correctly implemented• Constant monitoring and improvement• Custom design to specific parameters• Detailed check list• Diligence, Thoroughness & Honesty• Early planning and good well plan using Wellcat, enough lead time for

casing, tubulars, seals etc…• Enforcement of QAQC process• Environmental testing• Experience level of people involved• Going into drilling challenges studies before drilling the well

5)

HPHTWells.com

What are the key factors that contribute to the success of your QA/QC process?

Cont’d:

• Innovation to meet next generation demands• Involving right personnel with the right competence Rigorous expectation

management towards vendors• Management close the loop of failures• Proper standards• Packaging techniques• Redesign component specific for high temperature • Root cause analysis• Test at Temp'Shock and Vibration testing• Vendor requirements, Supply chain • Verify the plan of each step with right and real information• Wealth of offset data

5)

HPHTWells.com

Do you have any additional information or comments?

• Invest more money to research micro-electric ...• Managed Pressure Drilling could be used as an Active Well Control tool for

drilling HPHT wells. The technology needs to be customized for floating rigs in the North Sea

• Stick to safety, and environmental rules & regulations• The factors in subsea HP HT wells being in excess of 15,000 psi and 350F

are untested in the full scope of delivery of the drilled well. BOP control is not proven, recent developments in subsea wellhead systems are leading to 20,000psi and + 350F systems and alongside this the development of drilling BOP's is progressing quickly. The ability of the systems to access B and C annulus areas especially in large casing programs is a key area of concern and solutions need to be developed

• Use benekte with track record or proven long term test. Use common test criteria and facilities

6)

HPHTWells.com

Do you have any additional information or comments?

• HPHT wells will continue to push the limits of existing technology. In order to meet the demand of future requirements, the industry will need to work closer with suppliers of technology to craft solutions capable of drilling into harsher and hotter environments. The intelligence of the drill will continue to increase in intelligence. The development of smarter tools will take time and money. This initiative will need to be driven at many layers, funded over many years and supported by the DOE, Universities, Oil Field Service Providers, Semiconductor Suppliers and Passive and Magnetic suppliers. Trendsetter Electronics has been assisting the design and supply chain process for 15 years. We are currently positioned for component level and sub-system solutions supporting HPHT wells up to 230C 30Kpsi

• Operational adjustments should not be used as a substitute for safety factoring. specialists need to handle contingences when plans cannot be followed

6)

HPHTWells.com

Thanks to all participants!

More information about the HPHT Wells Summit in Aberdeen (23rd - 25th November 2010): HPHTWells.com

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Reduce risk and deliver optimal operational success in your HPHT projects. Hear directly from leading experts on key strategies to:n Manage risk, plan for emergency response and assess the

critical safety factors for HPHT operations - with insight from the HSE, Cameron McKenna and Marsh

n Explore the geophysical Challenges at the Erskine field - Chevron Upstream Europe share their experience

n Customise QA/QC procedures for your HPHT project - with experience from the International Research Institute of Stavanger AS

n Drive advances in completions for HPHT deep tight gas wells - Lukoil Saudi Arabia Energy Ltd bring case study experience of both appraisal and exploration wells

n Optimise HPHT well design: From concept to well construction - hear from Ed Mcfadden, Independent Consultant Engineer

HPHT Wells - From perception to realityMain conference: 24th & 25th November 2010 Pre-conference workshops: 23rd November 2010Venue: Ardoe House Hotel, Aberdeen

Sponsors & Exhibitors:

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20% Discount for Operators – Quote HPHTSLIDEO10% Discount for Consultants & Equipment Providers – Quote HPHTSLIDEV

A welcome note from the HPHT Programme Steering Committee…Dear industry colleagues,

HPHT operations are integral to the growth of the oil and gas industry. Getting the most out of your HPHT operations requires continuous learning and refinement of techniques and technologies to push the envelope as we continue to explore new areas, face new challenges and capture opportunities.

The Programme Steering Committee came together in Aberdeen for extensive discussions to draw up the key topics for the 2010 HPHT Wells Summit. We formulated an agenda with a number of new topics to cover this year including:

n Suspension and abandonment of HPHT wellsn Risk management, emergency response planning and safety of HPHT operations n HPHT well design: From concept to well constructionn Effectively managing uncertainty in pore pressure, fracture gradient and the “transition zone” n Delimiting the operational limits on drilling, logging & testing tools

Other major themes that have been highlighted for discussions at this year’s meeting include:n Well architecture and delivering a safe HPHT welln Well integrity challengesn Emerging technologies and technology gaps for HPHTn Operational considerations for HPHT well evaluations

The conference format is unique and mixes presentations, panel discussions, roundtables and workshops to ensure that you are able to learn first-hand from the practical experience shared amongst both expert speakers and the wider delegate audience.

We look forward to seeing you there.Andrew McHardy, Independent Consultant Grant Affleck, Weatherford Jean-Paul Stuyck, GDF Suez HPHT Wells 2010 Programme Steering Committee

Telephone: +44 (0)20 7368 9300

Fax: +44 (0)20 7368 9301

Email: enquire@iqpc.co.uk

Visit: www.hphtwells.com/slide

Programme highlights for this year include:

Industry breakfast with the HSE Thursday 25th November 2010, 7.45amJoin the HPHT community for a breakfast meeting on the morning of the second day of the conference. During breakfast, you’ll hear directly from Grant Moody, HM Principal Inspector of Health & Safety, HSE who will deliver a brief presentation on ‘Challenging wells in the UKCS – a regulator’s perspective’.

Case study experience of HPHT deep tight gas wellsLukoil Saudi Arabia Energy Ltd share insight into the process of optimisation for stimulation and production operations in a case study presentation of their drilling and completions experience in both exploration and appraisal wells in Saudi Arabia.

Safety & risk management panel discussionThis year, there is an exclusive interactive panel bringing together legal, risk, insurance, HSE and operator’s perspectives of key safety considerations for HPHT operations. Topics include:n Key considerations for environmental protection and pollutionn Balancing risk and exposuren Response team planning: Emergency response and oil spill response considerations

The 2010 speakers & panellists include:Ed Mcfadden, Independent Consultant EngineerGrant Moody, HM Principal Inspector of Health & Safety, HSERaid Bu-Khamseem, KEC CompanyJoerg Zaske, Senior Geophysicist, Chevron Upstream EuropeDerek Charlton, HP/HT Drilling Manager, Maersk OilAndrew McHardy, Independent Consultant & Well Examiner, TotalGrant Affleck, Business Development Manager, WeatherfordStuart Cole, Manager, Technical Sales and Services, Vallourec Group

Tony Furniss, Regional Sales Manager, Enventure International LLCCraig Hendrie, Managing Director, Plexus Ocean SystemsSteve Kirby, Drilling Engineer, Sasok Ltd John Munningstomes, Senior Risk Engineer – Upstream, MarshJan Burgess, Partner, Cameron McKennaR J Boocock, Consultant Petroleum EngineerOddvar Skjæveland, VP Ullrigg Drilling and Well Centre, IRIS

Conference Day One Wednesday 24th November 2010

08.30 Coffee and morning registration

09.00 Chairman’s opening remarks outlining the HPHT market overview

n Assess what has changed in the global offshore environment in the past 12 months and understand the impact on HPHT operations in the future

n Global insights into HPHT projects n New technologies and pushing the envelope with HPHT operations

09.30 Examine advances in completions for HPHT deep tight gas wells through insight into the process of optimisation for stimulation and production operations

n Explore Luksar’s testing and completion challenges in the first exploration stage n Assess how Luksar are advancing in completion and testing for A-1 & F-2

exploration wells n Lessons learnt and the way forward for T-4 appraisal well Raid Bu-Khamseen, KEC Company

10.15 Icebreaker networking and problem solving session In this interactive session, delegates will be assigned a team to work with

in order to solve a set scenario. In these teams, you will take the time to talk through the proposed scenario and evaluate the challenges, risks and opportunities you would be likely to come across. Each team’s spokesperson reports their findings back to the wider delegation.

10.45 Coffee and networking break

FOCUS ON HPHT SAFETY11.15 Emergency response planning and critical safety factors

for HPHT operations A panel of health and safety and risk experts will kick off by delivering short

10 minute overviews where they briefly share their perspective on what 2010 going forwards means for managing HPHT operational safety and risk management.

11.15 The regulator’s perspective n Understand key safety considerations for HPHT operations and ensure

that your safety strategies are robust for 2010 going forwards n Examine requirements for the operators’ compliance with safety regulations

for HPHT operations n Understand the importance of promoting a safety culture Grant Moody, HM Principal Inspector of Health & Safety,

Health and Safety Executive (HSE)

11.25 The legal perspective n What are the legal requirements for HPHT drilling safety and risk? n Examine key considerations for environmental protection and pollution n Mitigating risks and compliance Jan Burgess, Partner, CMS Cameron McKenna

11.35 The risk and insurance perspective n Ensure that you are effectively prepared when it comes to emergency

response and oil spill response n Understand key considerations for balancing risk and exposure n Explore what is required of the operator from the insurer’s perspective John Munningstomes, Senior Risk Engineer – Upstream, Marsh

11.45 Interactive panel debate and Q&A session You’ve heard the different perspectives from the HSE and risk professionals.

Now it is your opportunity to raise your questions and put forward any challenges and concerns directly to the panel of experts.

Interactive panellists: Andrew McHardy, Well Examiner, Total & Independent Consultant Jan Burgess, Partner, Cameron McKenna John Munningstomes, Senior Risk Engineer – Upstream, Marsh Grant Moody, HM Principal Inspector of Health & Safety, Health and Safety Executive (HSE)

12.15 Seated lunch and networking break

13.15 Carry out effective planning for the suspension and abandonment of HPHT wells

n Examine the legislative and guideline background n Understand the technical challenges involved and the required technologies n Assess your tubing and cementing requirements n Explore the major environmental considerations surrounding this complex area Steve Kirby, Drilling Engineer, Sasok Ltd

14.00 Gain insight into the geophysical challenges at the depleted HPHT Erskine Field, North Sea

Gain insight into the Erskine Field, a depleted HPHT gas condensate accumulation located on the western margin of the East Central Graben, Central North Sea, UKCS. This presentation will give you insight into:

n The challenges with wellbore stability while drilling, integrity due to significant liner deformations and sanding issues

n The geophysical and geomechanical studies conducted over the last couple of years, their applicability to HPHT reservoirs and the challenges to implement modern geophysical tools at a mature field

n The identification of high risk areas for wellbore integrity of existing wells and for the optimisation of potential infill well locations, changes in mud window during drilling and completion integrity

Joerg Zaske, Senior Geophysicist, Chevron Upstream Europe

14.45 Coffee and networking break

15.15 BLUE SKY THINKING - TECHNOLOGY REQUIREMENTS ROUNDTABLE SESSION

This interactive session will see the delegate audience split into two groups. This is your opportunity to voice your opinion on technology gaps and industry requirements for your forthcoming HPHT projects.

GROUP A: Expandable technology requirements n Gain insight into “Hot off the press” new technology n What does the industry require for expandable technology developments? n Explore effective strategies for the application of expandables in HPHT

environments Led by: Tony Furniss, Regional Sales Manager,

Enventure International LLC

GROUP B: Casing and tubing requirements n Casing and tubing requirements for HPHT depleted zones n Selecting the appropriate materials and connections n Casing with drilling applications – gain insight into developments Led by: Stuart Cole, Manager, Technical Sales and Services, Vallourec Group

16.30 Chairman’s close and end of day one

17.00 Networking drinks reception Join your peers in a relaxed and

informal setting for this excellent networking opportunity. This is a fantastic way to establish contacts early on at the conference and to strengthen relationships with existing contacts.

Telephone: +44 (0)20 7368 9300

Fax: +44 (0)20 7368 9301

Email: enquire@iqpc.co.uk

Visit: www.hphtwells.com/slide

Conference Day Two Thursday 25th November 2010

07.45 HPHT industry breakfast with the HSE Join your peers from the HPHT community for an industry breakfast

meeting. You can take this opportunity to catch up with your contacts informally whilst enjoying a full English breakfast and bacon rolls.

During breakfast, you’ll hear directly from Grant Moody, HM Principal Inspector of Health & Safety, HSE who will deliver a brief presentation on ‘Challenging wells in the UKCS – a regulator’s perspective’.

08.30 Coffee and registration

09.00 Chairman’s welcome

09.15 Exploring HPHT well design: From concept to well construction n Explore effective strategies to ensure that you have clear well objectives n Understand how allowing for uncertainty in pore pressure, fracture gradient and

the “transition zone” predictions is key to the success of your well construction n Understand why casing shoe points and casing strategy is as important as

detailed casing design n Examine the “lack of accurate data” paradox Ed Mcfadden, Independent Consultant Engineer

10.00 HPHT logging: Going the extra mile n New techniques extend the valid operating envelope n Data from case studies in Gulf of Mexico and North Sea n Increases in operating efficiency Grant Affleck, Business Development Manager, Weatherford

10.45 Coffee and networking break

11.15 Interactive panel discussion: Identifying technology gaps for HPHT completions

n Understanding fluid selection for your completions projects n Seals and tubular integrity – key technology gaps n Explore pore pressure projects n Key considerations for polymers and metallurgy n BOP considerations Interactive panellists: Derek Charlton, HP/HT Drilling Manager, Maersk Oil Andrew McHardy, Well Examiner, Total/ Independent Consultant Ed Mcfadden, Independent Consultant Engineer

12.00 Gain insight into requirements for friction grip technology and solid metal seals for HPHT surface and subsea wellheads

n Explore current industry standards for wellheads n Establish what makes a product fit for purpose for HPHT drilling and explore

testing and qualification procedures n Gain insight into key case studies on HPHT wellhead experience Craig Hendrie, Managing Director, Plexus Ocean Systems

12.45 Lunch and networking break

13.45 Testing and qualification of equipment for extreme applications n Customising QA/QC procedures for your HPHT project n Explore how technology and materials can better withstand hostile HPHT conditions n Specification and design of equipment: Managing risk in the design process n Ensuring your equipment is fit-for-purpose: From raw materials to manufacture Oddvar Skjæveland, VP Ullrigg Drilling and Well Centre,

International Research Institute of Stavanger AS

14.30 Addressing the many challenges of HPHT well evaluations HPHT wells offer an opportunity to shift the paradigm while adjusting the

mindset to cope with the current technological limitations. Success is often measured through the pre-determined KPIs which can fail to encompass the need for a fully integrated approach. In this session, you will explore how:

n Understanding past failures in reservoir management can provide the key to future success stories

n Well planning needs to be all encompassing and deal with all aspects from location, trajectory, well construction, drilling and completion fluid systems to available evaluation tools

n HPHT environments not only affect the drill bit selection and downhole steerable assemblies, but also the reservoir properties and test tools as well. Test programmes need to apply a suite of achievable objectives and a clear understanding of the effects of time and temperature on downhole logging and test tools

n Good planning with sufficient lead time can make all the difference R J Boocock, Consultant Petroleum Engineer

15.15 Coffee and networking break

15.45 Group competition of the well construction process During this group session, the delegation will be split into teams to build an

ideal well in a given scenario. You will: A) Consider what is currently available to you B) Identify any current technology gaps 1) Planning tools - integrated planning, hydraulics, real time to

actual comparisons 2) Rig capacity - size, onboard mud coolers fluid capacity, MPD spread,

(And total number of “capable” rigs) 3) Drilling tools - downhole equipment premium threaded components, etc 4) Fluids - weight, rheology, variable behaviour with heating / cooling cycles,

control with mpd 5) Cement - design, testing, “foams” 6) Casing - steels etc 7) Completions - tools transferring conventional technology to ht domain 8) Well test - special tools, differing test patterns 9) Logging - real time vs. recorded vs. wireline, new developments This group exercise is created to determine the difference between

the actual edge of the current envelope, and the theoretical limit of upcoming potential wells.

16.30 Chairman’s close and end of conference

Supported by:

Event partnership opportunitiesMake the most of this unique opportunity to further your business development and marketing in the HPHT marketplace. Through tailored networking, sponsors can achieve the face-to-face contact that overcrowded trade shows cannot deliver. Sponsorship options are extensive and packages can be tailor-made to suit your company’s individual needs. Most packages include targeted marketing to over 10,000 HPHT professionals and tailored networking opportunities. For further information on exclusive profiling at the 2010 HPHT Wells Summit please call us on +44 (0) 20 7368 9300 or e-mail sponsorship@iqpc.co.uk

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Main conference: 24th & 25th November 2010 Pre-conference workshops: 23rd November 2010Venue: Ardoe House Hotel, Aberdeen

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Interactive Workshops Tuesday 23rd November 2010

08.45 – 12.00 Interactive Workshop A: Examine critical completions

considerations and well integrity issues for HPHT environments

This in-depth workshop will give you the opportunity to assess first-hand some of the most effective completions and well integrity challenges, and discover the techniques and strategies required to overcome them.

During the interactive discussions, you will have the opportunity to:

n Explore in detail the use of various HPHT completion techniques n Understand what the emerging technologies are in this space n Examine the critical aspects of HPHT well integrity n Address issues surrounding HPHT well integrity with application to life

of well prediction n Gain insight into cementing practices and cement fatigue in HPHT wells n Measure corrosive formation fluids effects on: - Tubular integrity - Pressure barrier sealing performance - Well head seals - Downhole mechanical seals in packers

n Key considerations for cement sealing and structural integrity

Workshop leader to be announced

12.30 – 15.30 Interactive Workshop B:

Understand the need for discipline integration with HPHT wells

During this “hands-on” workshop, teams will work through an exercise to carry out a plan for well construction within a set scenario. Through this exercise, you will:

n Define the challenges and being aware of “ripple on” effects of decisions made n Determine the players and their roles – possible shift in present organisation required n Engage in discussions as to why early buy-in from senior management

is critical

In order to maximise group participation, you will be split into teams. In your teams, you will work out a plan based around your scenario and then you will then report back to the whole workshop. Key considerations will include:

n Bringing the ultimate goal of production back to the initial planning stage n Setting up a paper exercise of a well construction based on known reservoir

conditions and having back-up plans to address possible surprises n Establishing guidelines for drilling team

In this session, you will understand why thinking about the well objectives is critical to the well design. You will take into account the fact that if you only look at the drilling of the well (pressure integrity of the casing) rather than size, type and depth of the specific string, you may plan yourself into a corner with no room to adjust should higher pressures be encountered further up-hole. This could mean that you need to run another intermediate string and that could not be available or be wrongly sized to enable test tools to get to the depth required. You need to avoid having a drilled hole that nothing can fit in for evaluation purposes.

Jointly a final plan is made complete with contingencies and objectives all agreed.

Led by R.J. Boocock, Consultant Petroleum Engineer All of R.J. Boocock’s experience has been “hands-on” within the oil and gas industry, specialising in

field development, reservoir engineering, production operations, optimisation and surveillance, drilling, completions, work-overs and contract negotiations. He has been heavily involved in training programs and produced manuals such as “Advanced Well Testing”, “Drilling and Geological Operations” and “Exploration Well Programmes”. He recently completed an assignment for GSPC doing well testing work in HPHT wells.

Baker Hughes delivers innovative, reliable products and services designed to help customers manage operating expenses, maximize reserve recovery and boost overall return on investment. Baker Hughes has been a technology leader in the oil and gas industry for over 100 years and continues to partner with operators to find solutions for progressively more complex technical challenges. A leading global oilfield service company with operations in over 90 countries and nearly 50,000 employees globally, Baker Hughes provides advanced products and services to help customers drill, evaluate, complete and produce oil and gas wells. Baker Hughes’ reservoir technology experts offer independent consulting services, geomechanics modeling, petroleum engineering and reservoir simulation services to achieve superior results that lower costs, reduce risk, improve productivity and increase ultimate recovery. At Baker Hughes collaboration is at the heart of our business. Our 23 local geomarket teams work side by side with customers to engineer reliable, application-specific products and services – whether the application is deep water, unconventional hydrocarbons or production and water management - and deliver technologies that improve operating efficiency and create more value from the reservoir.

READ Well Services is a downhole technology specialist providing a variety of new downhole well construction, repair and well intervention services to the oil and gas industry. RWS’s expertise lies in its ground breaking Hydraulically Expandable Tubular System (HETS), Cased Hole Logging services (data acquisition and analysis) and Development and Engineering.

Houston-based Enventure Global Technology, L.L.C., the world’s leading provider of SET® solid expandable technology solutions for the energy industry, has a global presence with operations in North America, the Middle East, South America, Europe and the Far East. Enventure’s SET® technology minimizes the tapering event in oil and gas wells by radially enlarging proprietary tubulars through a cold-drawing process. SET® systems are used in openhole and cased-hole environments to mitigate trouble zones, add casing points, remediate damaged casing and cover perforations.

Weatherford International Ltd (WFT: NYSE) is the fourth-largest diversified upstream oilfield service company in the world. Our global network includes more than 34,000 people, 730 service bases, 87 manufacturing facilities, and 13 Technology Centers in more than100 countries. Our products and services span the lifecycle of a well, including drilling, evaluation, completion, production and intervention. The Company’s range of production enabling technologies include evaluation services, directional drilling services, controlled pressure drilling® (CPD®) systems, cased hole completion systems, expandable technologies, intelligent completion technologies, production optimisation systems and all major forms of artificial lift systems. Weatherford International Ltd, Tel: +44 (0) 1224 380180 Fax: +44 (0) 1224 241601Email: grant.affleck@eu.weatherford.com Web: www.weatherford.com

Roundtable Sponsor: Vallourec & Mannesmann Oil & Gas UK (VMOG UK) manufactures casing and tubing to the highest industry standards, for the world’s most progressive oil companies. Over the last year, VMOG UK has been facilitating the upsurge in HP-HT activity in the North Sea through a project-based approach to the most extreme exploration projects ever seen, with extensive qualification testing and dedicated manufacturing quality plans. The expertise gained through supplying casing and tubing for Total’s Elgin-Franklin and Glenelg projects, and Shell’s Shearwater, Onyx and Aragorn projects (to name but a few) ensured that V&M has the extensive experience so vital to delivering success in HP-HT wells. In 2007, VMOG UK has supplied all of the casing and tubing for the highest pressure well ever drilled in the UKCS North Sea, from the 13 5/8” production casing through to the 3 1/2” sour service work-string for the well test. Vallourec Mannesmann Oil & Gas UK Office, Tel: +44 (0) 1224 279350 Fax: +44 (0) 1224 279341 Email: scole@vmog.co.uk Web: www.vamservices.com /www.vmog.co.uk

Plexus Holdings plc. is an AIM listed engineering and service business in the oil and gas industry based in Aberdeen. Plexus has developed and patented a unique method of engineering for oil and gas field wellheads and connectors, called POS-GRIP® Technology which involves deforming one tubular member against another to effect gripping and sealing. POS-GRIP Wellheads are the leading technology for HPHT exploration drilling and production due to their through-BOP and true metal to metal “HG” Seal capability. Plexus Ocean Systems Ltd, Plexus House, Burnside Drive, Dyce, Aberdeen, AB21 0HW, UK. Tel: +44 (0)1224 774222 Web: www.posgrip.com Email: cfh@posgrip.com

Sponsors & Exhibitors: