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Keywords: insulation
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Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31188-MS
... engineering analysis and construction methods were used to ensure the integrity of the inner pipe during the pre-stressing process and operation. piping simulation friction contraction operation upstream oil & gas displacement inline bulkhead fe model offshore pipeline insulation bulkhead...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31211-MS
... it possible to operate with low power consumption, which is a key in today's world of energetic efficiency. upstream oil & gas ehtf operation project execution project management insulation contractor heating electrically heat-traced flowline extension ehtf ehtf system operator...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2020
Paper Number: OTC-30476-MS
... Abstract Standard pipe-in-pipe (PiP) technology consists of an inner flowline insulated with high performance dry insulation and an outer carrier pipe that protects the insulation. Electrically Trace Heated Pipe-in-Pipe (ETH-PiP) technology is an adaptation of the standard PiP where electrical...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2020
Paper Number: OTC-30650-MS
... purposes, spiraled against the inner pipe and covered by high thermal performance insulation allowing a high thermal system efficiency. The high thermal efficiency combined with a primarily resistive electrical system makes the ETH-PIP the most energy efficient active heating technology. Long power...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2020
Paper Number: OTC-30818-MS
... insulation to higher electrical gradients has been now successfully qualified, allowing DEH to be applied on longer distance tie-backs than before Technology improvements A 3-year R&D on high frequency DEH gives both technical advantages for interference with other subsea equipment, reduced AC...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29523-MS
... annulus between the 10" and the 16" allows for good insulation, and combined with reduced annulus pressure, a U-value of less than 0.5 W/m/K is achieved. Such a low U-value allows for a more passive system where only limited power is required for heating. The ærfugl EHTF system is based on a topside...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29265-MS
... offshore technology conference upstream oil & gas fluid temperature power requirement subsea multiphase cable diameter operation passive insulation fiber optic insulation requirement electrical distribution subsea production equipment deepwater opportunity electrically trace flowline...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-28987-MS
... the qualification testing recently conducted on a reduced scale prototype, with a description of the prototype and the main results obtained. pipe scenario heating station insulation flowrate upstream oil & gas local heating station initial conventional loop conventional loop magnetic field...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-29048-MS
... Abstract Cool Down Testing (CDT) used to be an integral part of project execution justified in order to verify the thermal performance of an insulated subsea production system. To combat cost and schedule risk a joint venture set out to qualify Computational Fluid Dynamics (CFD) methods...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-29049-MS
.... Utilization of non-evasive tools such as Real Time Radiography, Digital Radiography and Backscatter Computed Tomography to inspect composite wrap repairs and corrosion under insulation for insulated piping and pressure systems, eliminating the requirement to removal & reinstallation of insulation...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-28704-MS
... D thesis , Colorado School of Mines . Chin , Y. D. , , ( 2000 ), Multiphase Flow and Thermal Analysis Of An Insulated Multiple Flowline Bundle , Proceedings of ETCE/ OMAE 2000 Joint Conference Energy for the New Millennium , February 14-17, 2000 , New Orleans, LA Churchill...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27578-MS
... in heat traced pipe in pipe concept (e.g. onshore applications), the electrical cables are wound around the inner pipe, covered with insulating material and enclosed in an outer pipe. Fiber optic cables are in general added for temperature monitoring purposes. In the case of this solution, several...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2016
Paper Number: OTC-27100-MS
... since 2009 within the framework of a cooperation between a major offshore contractor and a PiP design and manufacturing company. The low power consumption EHTF Technology is based on a field-proven, high performance PiP system. A specific insulation material arrangement (mineral/silica based...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2016
Paper Number: OTC-27228-MS
... such technique using the commercial software package StarCCM+. The approach builds a 3D CFD model for one entire tank, including insulation, filling and discharge pipes, gas vents, and (if necessary) cofferdam areas and internal tank structure. Hydrodynamics, thermodynamics, heat transfer through the insulation...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2016
Paper Number: OTC-26980-MS
... (CIGRE) and the International Electrotechnical Commission (IEC) are considering creating standards and this paper proposes a basis for this. probability upstream oil & gas offshore technology conference termination limitation cable electrical stress extruded insulation protection...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2016
Paper Number: OTC-27120-MS
.... The benefits and drawbacks of different power transformer arrangements are reviewed with available topsides electrical network (power balance / voltages / redundancy). Integrity monitoring and fault protection for local and remote topsides options are reviewed; specifically, the application of line insulation...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2016
Paper Number: OTC-27114-MS
... contain conspicuous acknowledgment of OTC copyright. Abstract The purpose of a pipe-in-pipe flowline is to provide a highly insulated system to minimise the transfer of heat between the transported fluids and the surrounding ambient environment. The dry environment between the concentric pipes allows high...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2015
Paper Number: OTC-26007-MS
... present significant challenges and drive the corrosion process. Multiple factors influence the TOLC process. These include fluid characteristics and composition, flow regimes, pH, flowline material properties, fluid and ambient temperatures, protective and insulation layers properties, bathymetry...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2015
Paper Number: OTC-25878-MS
... conditions that are common to thermally insulated flowlines, rather than uninsulated export pipelines. As a result, sealing system designs must utilize significantly improved sealing methods replacing elastomer packers with diecast graphite packers used for traditional offshore pipeline seal systems...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2015
Paper Number: OTC-25971-MS
.... Offshore umbilical and deepwater applications are considered. The power cable consists of a longitudinally blocked, stranded conductor which is surrounded by an insulating core of semi-conducting and insulating layers thereof. The conductor has an effective blocking system that includes strand seal...

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