Track record

Projects delivered by Z-Subsea Energies and the earlier experience of our directors and associates in subsea design, integrity and materials engineering.

Below are projects delivered by Z-Subsea Energies, followed by the experience our directors and associates gained before joining us, at design consultancies, verification bodies and operators such as J P Kenny, KBR, Xodus Group, Genesis Oil and Gas Consultants, DNV, Lloyd’s Register, TWI and Talisman Energy. For more information about any of these projects, please get in touch.

Z-Subsea Energies projects

Global in-place riser and pipeline stress analysis and fatigue assessment for EnQuest Malaysia (through Ankaa Consulting)
Level 2 and 3 free span assessment of the SEA–SEB and SED–SEA subsea pipelines for EnQuest Malaysia
Risk assessment and integrity status review of 8-inch RaB subsea pipelines for EnQuest Malaysia
On-bottom stability for the RAS MARKAZ Crude Oil Park project (Phase 1)
Dent assessment of the NCS-2 pipeline for PetroVietnam Gas (PV Gas)
Level 1, 2 and 3 free span assessment of the Nam Con Son gas pipeline for PV Gas
Advanced dent assessment of the 48-inch Paradip offshore pipeline for Indian Oil Corporation Ltd (IOCL)
ILI data analysis, fitness for purpose (metal loss, dents and gouges) and remaining life of six onshore and offshore pipelines in the Middle East for Noran Energy
Risk-based inspection, integrity assessment and management of the Miskar and Hannibal platforms and related equipment and structures for Shell Tunisia
Fitness for service and detailed dent assessment for EnQuest’s Scolty–Crathes pipeline remediation project
Fitness for service and life extension of an anchor-dented subsea pipeline using finite element analysis
ILI data analysis, fitness for purpose and remaining life of seven offshore pipelines for PV Gas, Vietnam
ILI data analysis, fitness for purpose and remaining life of onshore pipelines for NISOC
Audit of Oman Gas Company’s integrity management system
Tee and wye design to ASME VIII Div. 2 for 2,300 m water depth offshore Brazil, for Peritus International and Petrobras
Materials, welding and ECA technical authority for Tullow Oil’s TEN project in Ghana
Inspection, monitoring and integrity management of 12 J-tubes within concrete caissons for TAQA
Dynamic nonlinear FE analysis of a semi-submersible impact on a jacket for Fairlead Maritime
Verification and development of a free span and VIV analysis tool for Neptune Marine Services, Australia
Design verification of the Bukha-A platform topside modification (piping, process and materials) for DNV Middle East and Oman Oil Company Exploration & Production
Design verification of the Musandam Gas Plant subsea pipeline for DNV Middle East and Oman Oil Company Exploration & Production
Design performance standards for onshore pipelines, structures and facilities for DNV Middle East and Petroleum Development Oman
A one-year contract with a major Middle East operator for pipeline ILI data analysis, fitness for service, remaining life and repair
Technical training worldwide, including for Neptune Marine Services (Australia), PetroVietnam (PVD Training), IBC Asia (Singapore), L G Laurent (China), Bureau Veritas and Petronas

Our people’s experience: subsea design

FEED of the Jordbær field development, BG Norge
FEED of the Devenick field development, BP
FEED of the Flyndre and Cawdor field development, Maersk and Talisman Energy
FEED and detailed design verification of the Rev and Varg South gas condensate fields, Talisman Energy Norge
FEED and detailed design of the Shah Deniz Stage 2 risers and J-tubes, BP
Pre-FEED and field layout of the West Delta Deep Marine (WDDM) Phase IX development, BG
FEED and detailed design of the Jasmine and Jade HPHT pipe-in-pipe riser, spools and bulkheads, ConocoPhillips
FEED of the Ptarmigan field development, Oilexco
Detailed design of the Skarv field development, BP
Detailed design of the Al-Rayyan pipeline and PLEM, Occidental Petroleum of Qatar
Detailed design of the Lyell pipeline, tie-in spool and flanges, CNR International
Design verification of the Galley redevelopment, Talisman Energy
Design verification of Halfdan Northeast Phase 3, Maersk Oil
Design verification of the offshore section of the Turkey–Greece natural gas pipeline, Petroleum Pipeline Corporation of Turkey
Design verification of the Dumbarton field development, Maersk Oil North Sea UK
Design verification of the Chestnut field development, Venture Production
Field layout study at the Scott platform for the Rochelle field development
Laggan tie-in spool and flange design, Total
Design verification of the Dunbar and Alwyn pipe-in-pipe tie-in spools, Total

Our people’s experience: integrity management and engineering

Lateral buckling, trawl gear interference and free span assessment of the Vesterled and Frigg pipeline system, Total
Lateral buckling assessment of the Alwyn North pipeline system, Total
Pipeline integrity assessment during plug recovery at the Bruce field, BP
Pipeline integrity technical authority for North Sea assets, BP
Integrity assessment of a scoured tie-in spool, Talisman Energy UK
Fatigue failure assessment of a ruptured top-drive shaft on the drilling rig Eirik Raude
Integrity management procedure for the Huntington subsea system, E.ON
Fitness for service of the Triton–Clapham water injection valve skid, Petro-Canada UK
Fitness for service, remaining life and life extension of risers, pipelines, pressure vessels and piping on Buchan A, Claymore, Montrose, Tartan, Flotta and Clyde, Talisman UK
Corrosion and life-extension assessment of the Elgin–Franklin gas export riser, Total UK
Life extension of the Dunbar–Alwyn pipe-in-pipe and Dunbar pipeline, Total UK
Integrity assessment and remaining life for the Forvie pipelines uprating, Total UK
Fitness for service and remaining life of the Dunlin J-tube and riser, Fairfield Energy
Integrity, fitness for service and life extension of 12 subsea pipelines and platforms, Centrica Energy
Fitness for service and life extension of 6-, 8- and 20-inch subsea pipelines, Shell Malaysia
Technical integrity procedures for 12 offshore pipelines and risers, Bureau Veritas for Dubai Petroleum
Emergency pipeline repair system (EPRS) for five onshore and offshore pipelines, PDO
Pigging and integrity management philosophies for three offshore pipelines, Cuu Long JOC, Vietnam
Risk-based integrity management system for the Mari-B production system, Noble Energy
Corrosion assessment of the Al-Shaheen water injection pipes to DNV-RP-F101, Maersk
Corrosion assessment of pipeline PL488/15S, Total UK
Cathodic protection design and retrofit for the OFON pipelines and platforms, Technip
Integrity approach for flexible risers and pipelines, Technip Flexibles
ECA verification and integrity management of weld defects on Goliat bend stiffeners, Technip Norge
ECA of two OLT LNG pipelines to BS 7910, Saipem
ECA verification, Corrib phase III, Shell UK
ECA verification of the Camarupim sour gas pipeline, Petrobras
Installation and operation ECA of two offshore pipelines at Otway, Australia, Allseas
Sour-service ECA of 10-, 12- and 14-inch clad girth-welded pipes, Allseas
Mechanical characterisation and ECA of 14-inch clad girth-welded pipes, Saipem UK
Fracture characterisation and defect assessment of 14-inch Sakhalin II girth-welded pipe, Shell
Fitness for service to BS 7910 and burst testing of damaged 30-inch oil pipes, Sasol
Joint industry project on residual stress in the ECA of girth welds under high plastic deformation
Upheaval buckling design of the Terra Nova flexible pipeline, Acergy for Petro-Canada
Free span assessment of more than 200 km of pipelines for Armada and East and West Shetland
FE modelling of bundled pipe-in-pipe systems for the Farragon and Goosander expansion checks

Our people’s experience: materials and corrosion

Materials selection and CO₂ corrosion for the Devenick development, BP
Materials selection for the subsea pipelines, spools and risers of the Bruce–Fulla tieback, BP
Materials, corrosion and welding support for Greater Plutonio FPSO topsides and subsea systems, BP
Materials and corrosion programmes for potential Harding subsea projects, BP
Downhole, subsea and topsides materials for the Athena detailed design, Ithaca Energy
Materials for the Dunga onshore separation and gathering facilities, Maersk, Kazakhstan
Grevling feasibility study, Talisman Norge
Claymore gas compression train upgrade, Talisman
Huntington subsea detailed design, E.ON
Laggan–Tormore gas plant FEED materials selection and EPC tender support, Total
Bream subsea pre-FEED materials selection, BG Norge
Materials for subsea facilities, pipelines and risers in the Columbus FEED
Logbaba gas plant FEED, Victoria Oil & Gas, Cameroon
Materials, coating, cathodic protection and corrosion monitoring specifications for a crude oil storage tank on Zirku Island, ZADCO
Materials of construction for LNG, GTL and refinery projects including Gorgon, Pluto, Pearl GTL, Dragon LNG, Mongstad, Nigeria LNG, Dung Quat, Kårstø, In Amenas and Yemen LNG