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February 01, 2018 12:00 AM

Trelleborg seals advance for unconventional subsea wells

Patrick Raleigh
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    The company will unveil the “sophisticated” subsea sealing technology at the Subsea Expo Conference & Exhibition in Aberdeen in February, said a 31 Jan announcement.

    Called XploR, the sealing materials comprise a range of advanced elastomers especially developed for oil and gas applications, each featuring low compression set characteristics.

    The materials are said to exhibit superior methanol resistance and optimal chemical resistance for enhanced oil recovery applications, along with increased high temperature capabilities.

    Other HNBR materials in the range exhibit superior low compression set performance and high temperature sealing capability, added Trelleborg.

    The range also includes high mechanical-strength HNBR grades, said to provide “outstanding” wear and abrasion capabilities, making them suitable for use in dynamic applications.”

    Seals, said Trelleborg, are available in all standard international O-ring sizes and cross-sections, and can also be used for custom-engineered and special seal designs.

    Unconventional wells are essentially any reservoir that requires special recovery operations outside the conventional operating practices.

    “Conventional subsea operating temperatures of up to +120 °C increase in unconventional wells to over +200 °C in deep reservoirs, while typical pressures have on occasion trebled from a previous standard of 69 MPa/ 10,000 psi to 207 MPa/ 30,000 psi,” noted Longdon.

    Trelleborg Sealing Solutions, he added, has “recognised that standard sealing solutions and materials of previous years were unable to withstand the extreme operating temperatures and pressures of drilling at greater depths.

    “We knew specialised solutions in both material and seal profile technology would be required in order for the industry to start exploring unconventional wells.”

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