DRILLING AND WELL INTERVENTION

Wellhead Integrity Monitoring Reference projects

1 Troll, Songa Encourage (2017) | integrity monitoring | Statoil Monitoring of wellhead integrity during well intervention of Troll well(s) with Songa Endurance. Ser- vice made through streaming of sensor data from existing sensors on the BOP. 2 Åsgard, Songa Encourage (2017) | Wellhead integrity monitoring | Statoil Monitoring of wellhead integrity during well intervention of Åsgard well(s) with Songa Encourage. Service made through streaming of sensor data from existing sensors on the BOP. 3 Skarv, Songa Enabler (2017) | Wellhead integrity monitoring | AkerBP Monitoring of wellhead integrity during well intervention of Skarv well(s) with Songa Enabler. Service made through streaming of sensor data from existing sensors on the BOP. 4 Verbier, Spitsbergen (2017) | Wellhead integrity monitoring | Statoil Monitoring of wellhead integrity during drilling of exploration well(s) in UK with Transocean Spitsbergen. 5 Kraken, Transocean Leader (2017-2018) | Wellhead integrity monitoring | EnQuest Monitoring of wellhead integrity during drilling and completion of Kraken well(s) in UK with Transocean Leader. 6 Craster, West Phoenix (2017) | Wellhead integrity monitoring | Nexen Monitoring of wellhead integrity during drilling of exploration well(s) in UK with Transocean Spitsber- gen.

4Subsea offers drilling and well intervention services to extend the life of producing wells. We help operators perform offshore drilling, completion, and intervention operations safely and efficiently. The Drilling and Well Intervention range contains Wellhead Integrity Monitoring (SWIM™), WellCare™, and Conductor, Wellhead and Riser Analysis. 7 Maria, Deepsea Stav. (2017-2018) | Wellhead integrity monitoring | Odfjell/Wintershall Monitoring of wellhead integrity during drilling and completion of the Maria well with Deepsea Stavan- ger. Service is performed through drilling contractor to operator. 8 Visund, Visund Floater (2017-2018) | Wellhead integrity monitoring | Statoil Monitoring of wellhead integrity during drilling and well interventions on Visund floater. 9 Sygna , Bideford Dolphin (2017) | Wellhead integrity monitoring | Statoil Monitoring of wellhead integrity during well intervention of a well Bideford Dolphin. 10 Janice P&A, Ocean Valiant (2017-2018) | Wellhead integrity monitoring | Maersk Oil Monitoring of wellhead integrity during plug and abandonment of brownfield wells and drilling of exploration wells with Ocean Valiant. 11 Alta 4, Filicudi, Gohta, Børselv, Hufsa, Leiv Erikson (2016-2017) | Lundin Monitoring of wellhead integrity during exploration drilling campaign with Leiv Erikson. 12 Troll, Fram (2016) | Wellhead integrity monitoring | Statoil Monitoring of wellhead integrity during drilling and completion of a well with Stena Don. 13 Tordis, Vigdis, Statfjord Nord (2016) | Wellhead integrity monitoring | Statoil Monitoring of wellhead integrity during drilling and completion of wells with Bideford Dolphin. 14 Neiden, Fosen, Alta 3 (2016) | Wellhead integrity monitoring | Lundin Live monitoring of wellhead integrity and wellhead fatigue during drilling of several wells with Island Innovator. 15 Lorry, Alta 2, Alta 3 (2015) | Wellhead integrity monitoring | Lundin Live monitoring of wellhead integrity and wellhead fatigue during drilling of several wells with Island Innovator. Live monitoring of lower flex joint angle with guidance on rig position for minimum well- head damage at critical stages of the operation. 16 Gemini (2015) | Wellhead integrity monitoring | Lundin Monitoring of wellhead integrity and wellhead fatigue during drilling of a well. 17 Zulu (2015) | Wellhead integrity monitoring | Lundin Monitoring of wellhead integrity and wellhead fatigue during drilling of a well. Live monitoring of lower flex joint angle with guidance on rig position for minimum wellhead damage at critical stages of the operation. 18 Ivar Aasen (2015) | Conductor monitoring | Det norske oljeselskap Monitoring of jackup rig conductor movement and fatigue analysis of most critical conductor connectors during drilling of a well. 19 Tordis, Vigdis, Statfjord (2014-2015) | Wellhead integrity monitoring | Statoil Live monitoring of wellhead integrity and wellhead fatigue during drilling and completion of 12 wells in the Norwegian Sea with Bideford Dolphin. 20 Troll, Tyrihans (2014) | Wellhead integrity monitoring | Statoil Monitoring of wellhead integrity and wellhead fatigue during drilling and completion of a well. 21 Snorre B (2013-2014) | Wellhead integrity monitoring | Statoil Monitoring of wellhead integrity and wellhead fatigue during drilling and completion of a well.

4Subsea offers drilling and well intervention services to extend the life of producing wells. We help operators perform offshore drilling, completion, and intervention operations safely and efficiently. The Drilling and Well Intervention range contains Subsea Wellhead Integrity Monitoring (SWIM™), WellCare™, and Conductor, Wellhead and Riser Analysis. 22 Troll, Oseberg (2013) | Wellhead integrity monitoring | Statoil Monitoring of wellhead integrity during side track drilling and re-completion of a well. Performed wellhead fatigue retrospective fatigue analysis based on measured results. 23 Polar Pioneer platform (2010) | BOP monitoring for wellhead fatigue | Statoil Monitoring of upper and lower flexjoint using flexjoint monitoring system. Prototype testing of SMS Gyro™ sensors for measuring lower flexjoint angles and BOP movement. Verification of results for SMS Gyro™ sensor by comparing with results from more “traditional” 5-axis sensors. 24 Borgland Dolphin platform (2011) | BOP monitoring for wellhead fatigue | BP Norge Live monitoring of upper and lower flexjoint, on board data storage and presentation of operating para- meters. Wellhead fatigue analysis and status reporting based on measured response from operations.

25 Transocean Leader platform (2011) | Conductor stability monitoring | Statoil Monitoring of conductor stability on a satellite well with daily analysis of developments in conductor stability. 26 Bideford Dolphin platform (2011-2013) | BOP monitoring for wellhead fatigue | Statoil Monitoring of upper and lower flexjoint as operational support. Storage of measured data in WellTrack and retrospective wellhead fatigue analysis on selected wells. 27 Polar Pioneer platform (2011-2013) | BOP monitoring for wellhead fatigue | BP Norge Live monitoring of upper and lower flexjoint for operational support mainly during completion. Storage of measurement data in WellTrack and subsequent wellhead fatigue analysis based on measured results to provide a field status report on wellhead fatigue every 6 months during the three-year campaign. 28 Norne (2011-2013) | Processing of measurements | BP Norge Processing data from operation on several wells on a Norne subsea template with Aker Spitsbergen.

4Subsea is a Norwegian technology company specialised in production riser systems and subsea well systems. We deliver solutions to maintain production from subsea oil and gas fields, enabling cost reduction and increased service life of existing installations. We also provide our specialist services within offshore wind turbines and wave power systems.

4Subsea combines expert knowledge and practical experience with software and instrumentation to optimise operation of production risers and subsea wells, aiming to be in the forefront of digitising the oil and gas industry.

The company was established in 2007, and clients include all the major oil and gas operators as well as the large suppliers of subsea equipment. 4Subsea has offices in Asker (near Oslo), Bergen and Kristiansand in Norway and Rio de Janeiro in Brazil.

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Contact Asker (HQ) Bergen Kristiansand Rio de Janeiro Phone: +47 66 98 27 00 Smedsvingen 4 Nordåsdalen 25 Sjølystveien 25 Rua da Assembléia, 100, 20th floor Fax: +47 66 98 27 01 NO – 1395 Hvalstad NO – 5235 Rådal NO-4610 Kristiansand BR-20011-904 Rio de Janeiro, RJ Email: [email protected] Norway Norway Norway Brazil

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