OBSERVATORY SERVICING AND MAINTENANCE How to deploy and maintain a network of observatories around Europe? We don t built what we cannot maintain! Jean-François DROGOU IFREMER Steve ETCHEMENDY M.B.A.R.I 1
Observatory Servicing & maintenance Underwater intervention cover Site surveys Module lifting/deployment (ROV operation or assistance) Umbilicals/cables laying and underwater connections Inspection/Maintenance works General inspection, data retrieving&reconfiguration, adding or replacing sensor, replacing energy pack, marine fouling cleaning,.etc.. Need Naval means Underwater intervention systems (ROVs ) Techniques and procedures We will demonstrate that technologies and tools for construction, servicing and repair exist, and are reliable, at an affordable cost 2
Intervention hardware Observation ROV Work and Heavy Work class vehicles & Tooling (Specific Toolskid) Specialized systems AUV in future for survey only in offshore Evolution to hybrid systemssubsea based.. 3
Commercial aspects Work ROV operators Costs: Obs ROV: from 10 to 500 k Work ROV: from 3 to 5 M Day rates: Oceaneering International, Inc. Subsea 7 Sonsub (Saipem) Fugro Stolt Offshore (now Acergy) Canyon Technip Others Total Systems From 7 to 10 k /day for Work ROV + crew From 70 to 100 k /day Subsea services on day rates 150 80 60 35 30 25 20 50 450 4
Strategy & General guidelines Use ships of opportunity and non highly specialized surface vessels for deployment, when possible Use locally available vessels: limit mob/demob & transit Regroup several missions for a same ship & same intervention system Favorise long term programmed maintenance Operational procedures trials prior to going at sea MOU to facilitate time exchanges of ROVs between European institutes for operations on the observatories that they will operate. Demonstrations during field trials, using existing infrastructures (link WP3 & WP4) 5
Questions? Determination of the ROV/Ship charge for servicing NEPTUNE: 7 nodes/40 days per year Pertinence of a dedicated Ship+ROV versus contracting existing operators in industry and in science bodies 6
Tasks within WP2 Review about existing standardisation & systems engineering schemes, (ISO,API.offshore GPs) Review interfaces: For task c subsea infrastructure interfaces and existing underwater intervention methods (Antares, SN1,MARS,NEPTUNE Canada ) Criteria for using standards within demonstration missions Standards RPs Benefits: added safety reduced engineering interchangeability Deliverables: criteria for design of deep sea observatories taking into account subsea intervention(input to case studies WP3) D-8 : Give recommendations regarding standards to be used for demonstrations missions D-27 : Specification report for demonstration actions subsea intervention 7
Standards and recommended practices for underwater intervention and structures interfaces in the Offshore industry Possible benefits of offshore standards to the scientific community 8
Underwater Intervention Missions Surveys (ROV, AUV, Hull mounted sonars) Drilling support Construction support Lifting assistance Pipe Touch Down Point monitoring Underwater connections Post surveys Precomissionning assistance Production Inspection Maintenance Repair 9
Offshore Standards and RPs API ISO DNV NORSOK IMCA Company Specifications 10
American Petroleum Institute (API) API standards promote the use of safe, interchangeable equipment and operations through the use of proven, sound engineering practices as well as help reduce regulatory compliance costs, and in,conjunction with API s Quality Programs, many of these standards form the basis of API certification programs. Series 17: Subsea Production Systems REP 17H Remotely Operated Vehicle (ROV) Interfaces on Subsea Production Systems RP 17H gives functional requirements and guidelines for ROV interfaces on subsea production systems. It is applicable to both the selection and use of ROV interfaces on subsea production equipment, and provides guidance on design as well as the operational requirements for maximising the potential of standard equipment and design principles. 11
International Organization for Standardisation (ISO) 75 Petroleum and related technologies 75.180 «Equipment petroleum and natural gas industries» ISO 13628: Part 1: General requirements and recommendations Part 2: Flexible pipe systems for subsea and marine applications Part 3: Through flowline (TFL) systems Part 4: Subsea wellhead and tree equipment Part 5: Subsea umbilicals Part 6: Subsea production control systems Part 8: Remotely Operated Vehicle (ROV) interfaces on subsea production systems Part 9: Remotely Operated Tool (ROT) intervention systems 12
Det Norske Veritas (DNV) More oriented towards inspection, testing and certification processes Less potential for OFM designers Recommended Practise N DNV-RP-A203 Qualification procedures for new technology : Recommended Practise N DNV-RP-H101 Risk Management in Marine and Subsea Operations : DNV recommends a basic three-step process for management of risks within marine and subsea 13
NORSOK Based on existing international standards with some additional constraints U-102 Remotely Operated Vehicles Services ROV classification and good guidelines to subcontract ROV services 14
IMCA (International Marine Contractors Association) Best practice guidance, in the areas of safety, training and personnel competence IMCA R 002 to R 013 Field of ROV services and contracting 15
Possible use of Offshore standards 1. MATERIALS - Selection of raw materials - Manufacturing control - Traceability -Inspection - Shipping marking and packaging Metallic Materials Underwater Concrete Composite Materials Protective Coatings 2. MANUFACTURING - Material selection - Welding, bonding, bolting - Quality Control - Documentation - Factory Acceptance Tests - Shipping Marking and Packaging Cables and Connectors Structural components Power Modules Pressure Vessels Hydraulic Modules 3. MECHANICAL DESIGN - Design criteria - Design loads - Safety factors - Corrosion protection - Maintainability - Documentation 4. POWER AND CONTROL SYSTEM Structural Components Mechanical protections Lifting devices ROV interfaces Pressure Vessels Foundations 5. SYSTEM FABRICATION Sensors Interfaces Communication Protocols Equipment Selection Storage and Traceability Scheduling Data formats Data storage Operator Interface Interfaces Management Documentation Reporting FAT/SIT 6. CONSTRUCTION AND MAINTENANCE - Meteocan data - Spread mob/demob procedures - Work procedures - Safety plan - Data management and QC - Reporting Site surveys Cables laying Module lifting Inspection Maintenance Direct use Direct use with small modifs Partial use Little use Useless 16
Structures interfaces API 17H and ISO 13628-8 define mechanical and electro/hydraulic standards on ROV panels Grasping handles Docking points Dual down line intervention Valves handles Torque tool receptacles Interfaces design 17
Electrical/communication interfaces Not really standardised and mainly rely on each manufacturer design and usual practise Umbilical connections: No standards govern the design and construction of associated connectors («Underwater mateable connectors» - from 2 electric pins to multiple electro-optical), even if some specifications give guidelines for manufacturing and testing connectors 4 pin wet mateable connector with ROV friendly handle (ODI source) 18
Underwater Intervention No standards or RPs covering globally ROV intervention, but ISO 13628-8 for access API 17E & ISO 13628-5 for subsea cables installation ISO 13628-1 for proper maintenance planning and tooling design NORSOK U-102 for ROV services 19
Conclusions / Recommendations Follow when possible ISO and API for structure interfaces Start a standardisation initiative in terms of sensors interfaces, electrical power distribution and cable design Consider offshore RPs (NORSOK) for underwater intervention, but in parrallel, build up a data base related to ROV intervention Present scientific intervention on existing observatories Vehicles performances, tooling and sensors usage feed-back, break down statistics, operational hazards, crew manning, maintenance tricks, etc Operational procedures trials prior to going at sea Use existing infrastructure for training and demonstration 20