... ABSTRACT This paper discusses the lateral buckling re-assessment, performed after the as-built survey of rigid mechanically lined pipe (MLP) flowlines recently installed in the Mero1 Field, located in deep waters of the Santos Basin, offshore Brazil. The Mero 1 project is composed of rigid...

... ABSTRACT Direct electrical heating is a flow assurance method for subsea flowlines. This article considers direct electrically heated flowlines that were installed at an offshore facility in 2004. In 2022, one of the piggyback cables was successfully repaired. The root cause for failure was dielectric...

... ABSTRACT Lateral buckling design for flowlines in deep and ultra-deep water often relies on the use of sleepers or distributed buoyancy modules as buckle initiators. However, these methods can be associated with complex engineering, manufacturing or installation and may not be cost-effective...

... ABSTRACT The Raia field (formerly BM-C-33) is an ultra-deep water (2850 m) subsea development located in the Pre-salt region offshore Brazil. Its field architecture features a series of rigid production, gas lift and gas export flowlines and steel lazy wave risers (SLWRs). Raia is among...

... ABSTRACT When there are anomalous high pressure wells in the development of deep water oil and gas field, the conventional full-pressure design concept with excessive design pressures for manifolds, jumpers, and flowlines increase investment and reduces economic benefits. As a safety...

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... ABSTRACT This article evaluates flow assurance by heat trace cables for wet insulated flowlines as an alternative to direct electrical heating or chemicals. Heat trace cables are attractive for their simple and flexible design and that they can be retrofitted. Case studies of a 14" flowline...

... upstream oil & gas pipeline bottom roughness assessment pipeline as-laid embedment pipe vertical load penetration response embedment span route option flowline route roughness analysis assessment as-laid embedment production flowline vertical load penetration response model...

... Abstract Using the time domain finite element analyses and considering 95% non-exceedance installation currents, the dropped PLET and flowline configurations as well as the resulting footprints on the seabed in the vicinity of two existing gas export pipelines were used as the guides...

... production and costs of the subsea arrangement. The optimal position will be calculated through the usage of multiphase flow simulations and a genetic algorithm. The results will show that the relation between the flowline and trunk line diameter is critical for maximizing efficiency, and that the manifold's...

... ABSTRACT Direct Electrical Heating (DEH) is used as flow assurance on flowlines. This is to ensure that the flowline temperature stays above the critical temperature for formation of hydrates. Power to a DEH system is typically supplied subsea by a dynamic Riser Cable. A Riser Cable (RC...

... ABSTRACT A structural reliability analysis (SRA) has been performed for Equinor's Johan Castberg project to demonstrate that the 12" gas flowlines meet the required acceptance criteria in accordance with the design code DNV-OS-F101. The premise of the SRA is that the 12" gas flowline gains...

.... The development comprises of 4 drill centres and a single flowline system that ties into an existing platform. Production fluid from each of the manifolds feeds into the flowline system via the double spool system. The SCA design originated from the requirement to achieve a 100 m separation between...

... erosion. Consequently, free spans can be formed on pipelines connected to large structures. This paper addresses one such scenario, on 30" flowlines between the large Subsea Valve Station (SSVS) and the risers. Goosenecks connecting the flowlines to the Subsea Valve Station (SSVS) at one end...

... ABSTRACT This paper outlines the approach undertaken for the foundation design of the ZRB (Zero Radius Bend) structures for a subsea development in in the North-West Shelf of Australia. The subsea tie-back project, located in water depths ranging from 78m to 133m, comprised of a long flowline...

... ABSTRACT The TEN development project offshore Ghana (operated by Tullow Ghana Ltd and partners) includes one 6" gas production and six 8" oil production infield flowlines. The flowlines lengths vary from 3.2 km to 7.2 km and are located in water depths of 1200–1800 m. In order to achieve...

... gather their production through flowlines. The oil flow is then transported to the platform using a single riser, thus reducing the total length of pipelines since the wells are not individually connected to the platform. The advantage of using submarine manifolds is the reduction of costs associated...

... specific application flaw acceptance criteria bs 7910 upstream oil & gas scenario fracture toughness mechanical property plastic strain assessment offshore pipeline eca crack extension steel installation fcgr flowline operation specimen nter needs this much top space or margin...

... Abstract Direct electrical heating is a qualified method for flow assurance in coated oil and gas flowlines. A concern is ac corrosion on connected templates caused by stray currents from the DEH system. This has prevented DEH from being installed on flowlines with in-line templates...