Communication link design based on availability

MAR Consulting assisted a client in evaluating (satellite) communication link design solutions from operability, availability, and cost stand-point. The services of the communication link between the unmanned surface vessel (USV) are: Transfer payload data generated during seabed surveys or subsea inspections; Control and operate the USV, in emergency situations; Control and operate the unmanned launch and recovery system, in emergency situations; Control and operate the autonomous underwater vehicles, in emergency situations. The different services listed above have different requirements, such as data transfer capability and latency. MAR Consulting proposed several options to fulfill these operational requirements. We focused particularly on […]

Safety Analysis Report (SAR) of topside drilling BOP

MAR Consulting expertise was used to perform a safety analysis report (SAR) and SIL compliance verification of the safety instrumented functions on the topside drilling BOP stack. As part of this effort, a FMECA was performed for the BOP (FMECA of topside BOP and control system · MAR Consulting). NORSOK D-001 “Drilling facilities” and NORSOK D-010 “Well integrity in drilling and well operations” describe the well barriers used during drilling. Drilling BOPs require strategies and principles for design, operation, and maintenance since they are defined as part of a barrier. The objective is that the barrier will function as required […]

FMECA of topside BOP and control system

Introduction MAR Consulting facilitated and documented a Failure Modes, Effects and Criticality Analysis (FMECA) for a major operator, of a hydraulic and pneumatic control system in a topside drilling Blow-Out Preventer (BOP). The FMECA was part of the initiative to re-start drilling in a field in the Norwegian Continental Shelf (NCS). The BOP OEM updated the BOP with a shear boost upgrade, PLC upgrade, auxiliary readback pressure panels, and Managed Pressure Drilling (MPD) flowline function addition. Objective In addition to the failure analysis, the Safety Analysis Report (SAR) used the FMECA outcome to comply with functional safety rules and regulations […]

QA of RAM analysis for FPSO stationed in Norway

MAR Consulting AS had assisted on producing a reliability, availability, and maintainability (RAM) analysis of a floating production storage and offloading (FPSO) unit to be stationed in the Norwegian continental shelf (see the previous article here). The initial model in the front-end engineering (FEED) phase had the objective of estimating the production efficiency of the current configuration, providing insight on bad actors and basis for modifications to improve the production efficiency. Since then, the model was further developed to include further details during the design and detailed engineering phase. The objective is to provide a more accurate estimate of the […]

FMEA of electrical and control systems in subsea BOP

MAR Consulting facilitated and documented an FMEA of electrical and control systems of a major drilling contractor’s subsea BOP. Purpose of the FMEA MAR Consulting facilitated the failure mode, effects and criticality analysis (FMECA) based on the methodology described on international standard IEC60812. Since it also included analysis of diagnostic capabilities, it could also go by the FMEDA designation (failure mode, effects, and diagnostic analysis). However, the purpose was significantly different than most FMEAs. Typically, an FMEA evaluates a design with the objective to unveil its weaknesses (and strengths). As a result, this information can form the basis of a […]

FMECA electrical and control systems in subsea BOP

MAR Consulting facilitated and documented an FMECA of electrical and control systems of a major drilling contractor’s subsea BOP. Purpose of the FMECA MAR Consulting facilitated the failure mode, effects and criticality analysis (FMECA) based on the methodology described on international standard IEC60812. However, the purpose was significantly different than most FMECA workshops. Typically, external resources perform an FMECA to evaluate a design with the objective to unveil its weaknesses (and strengths). As a result, this information can form the basis of a cost-benefit analysis for design improvement opportunities. In this project, however, in addition to the above, the drilling contractor/operator will use […]

FPSO availability effect on 3rd party liquid evacuation

MAR Consulting performed an availability study of a floating, production, storage and offloading (FPSO), which will be operating in the Eastern Mediterranean Sea. The development plan envisages the use of an FPSO with full offshore processing capabilities of the reservoir fluids. Conditioned gas will be exported to shore and tie-in to the country’s gas distribution grid. The associated light oil will be exported offshore by tandem offloading to a shuttle tank. The FPSO storage tanks were being considered to evacuate a third-party operator light oil from a nearby field, in addition to the light oil from the FPSO’s own operating field. […]

Production efficiency of a floating production storage and offloading

MAR Consulting AS assisted on producing a reliability, availability and maintainability (RAM) analysis of a floating production storage and offloading (FPSO) unit to be stationed in the Norwegian continental shelf. The initial model in the front-end engineering (FEED) phase has the objective of estimating the production efficiency of the current configuration, providing insight on bad actors and basis for modifications to improve the production efficiency.