With global demand for oil increasing but reserves becoming more difficult to reach, Dow Oil & Gas is continually developing innovative solutions to help producers access this valuable resource from more extreme environments – safely and responsibly.
Continuing the strong legacy of the HYPERLAST™ line of flow assurance solutions – used for more than 25 years in over 500 successful projects worldwide – comes the next wave in flow assurance technology: NEPTUNE™ Advanced Subsea Flow Assurance Insulation System.
The widest use temperature range of any wet insulation system on the market
The NEPTUNE™ Advanced Subsea Flow Assurance Insulation System was designed in response to direct requests from offshore operators for a high-temperature flow assurance insulation system. The result of a multi-million-dollar and multi-year R&D effort led by Dow, the NEPTUNE™ System is engineered to deliver proven performance at operating temperatures from -40°C to 160°C.
|Typical Properties of NEPTUNE™
Advanced Subsea Flow Assurance Insulation System
|Installation method||Reel, S-lay, J-lay|
|Depth rating, m||At least 4,000|
|Subsea service temperature, °C||-40 to +160|
|Thermal conductivity under SST conditions(1),W m-1k-1||0.152|
|Density (ASTM D792, 23°C), g cc-1||1.1|
|Heat capacity (ASTM E1269, 0 to 160°C), J g-1 k-1||1.2 to 1.7|
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NEPTUNE™ System Illustration
The NEPTUNE™ System features a dual-layer composition: NEPTUNE FBE Anti-Corrosion Coating (thin blue layer), a fusion-bonded epoxy based on patented Dow resin technology, and NEPTUNE Flow Assurance Insulation Coating (thicker yellow layer), a proprietary hybrid polyether thermoset.
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Hydrolytic Stability Test
In the Hydrolytic Stability Test, samples of NEPTUNE™ Insulation Coating were aged at 160°C and a hydrostatic pressure of 300 bar for 3,000 hours (~18 weeks) in an autoclave. The tensile strength of the aged insulation was then compared to non-aged samples, indicating the system's property retention and overall polymer integrity.
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Flexural Fatigue Test
The Flexural Fatigue Test demonstrated the flexibility of the NEPTUNE™ System and its resilience to vibrations that may be experienced during production.
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Thermal Shock Test
The Thermal Shock Test demonstrated overall mechanical integrity of the NEPTUNE™ System under temperature variations that may be experienced during start-up.
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Simulated Service Test
In the Simulated Service Test, a coated pipe was subjected to hydrostatic pressure of 300 bar, water temperature of 4°C and service temperature of 160°C for 28 days, with three planned system shutdowns. This determined the overall heat transfer coefficient of the NEPTUNE™ System and validated its consistency in cool-down throughout the aging cycle.
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The Tensile Test demonstrated the NEPTUNE™ Insulation Coating's strength, flexibility and ability to withstand the rigorous lay process.
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Compressive Strength Test
The Compressive Strength Test demonstrated the NEPTUNE™ Insulation Coating's resiliency during the coating process, transport and final lay on the ocean floor.
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Dow Oil & Gas is a business unit of The Dow Chemical Company and its consolidated subsidiaries. That means that you not only get the benefit of in-depth industry knowledge from Dow Oil & Gas, you also get the backing of Dow’s long history as a global chemistry leader and R&D powerhouse.
Dow’s problem-solving process also brings a unique merger of chemistry and engineering experience for a more comprehensive understanding and solution to your challenges. Our innovative, customized and tested solutions are designed to meet the ever-changing needs of the oil and gas industry. In addition, we offer exceptional technical service.
With proven, reliable solutions to maximize the potential of your offshore assets – from exploration to production and processing – we want to be your total solutions provider for flow assurance and other subsea applications. Contact us to discuss how we can help.