Advance in DuPont™ Kalrez® Parts Overcomes Challenges of Harsh Oil and Gas Environments

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Reliability engineering for harsh oil and gas drilling environments such as deep water and shale has just taken a major step forward with the advent of DuPont™ Kalrez® 0090 perfluoroelastomer O-rings.

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The 0000 rating for RGD resistance is critical for customers.” “O-rings with ratings poorer than Kalrez® 0090 rating of 0000 may crack when exposed to pressure cycling, leading to a complete crack across the section, leading to seal failure.

Reliability engineering for harsh oil and gas drilling environments such as deep water and shale has just taken a major step forward with the advent of DuPont™ Kalrez® 0090 perfluoroelastomer O-rings.

In rigorous third-party testing for rapid gas decompression (RGD) resistance per the NORSOK M-710 Rev 2 standard, Kalrez® 0090 O-rings received the best possible rating of 0000. The tests were conducted by the independent Materials Engineering Research Laboratory Ltd. (MERL) in the U.K. In contrast to Kalrez® 0090 parts, other competitive seals can pass the minimum requirements of NORSOK M-710 with multiple internal cracks developed during test cycling.

“The 0000 rating for RGD resistance is critically important for customers,” said Arun Gopalakrishnan, global market segment leader -- DuPont Performance Polymers. “O-rings with ratings poorer than Kalrez® 0090 rating of 0000 are likely to suffer greater cracking when exposed to pressure cycling. Once a crack is initiated, gas will accumulate at the next pressure cycle, eventually leading to a complete crack across the section, which could lead to seal failure.”

MERL has also certified the excellent resistance of Kalrez® parts to sour fluid ageing, including multi-phase fluids containing hydrogen sulfide. Kalrez® parts withstand attack by more than 1,800 chemicals and solvents in all. In addition, they retain high levels of elasticity and recovery even after long-term exposure to temperatures up to 250°C (482°F) and have excellent extrusion resistance as well.

The advent of Kalrez® 0090 parts adds another element to the DuPont portfolio of high-performance components and materials for the oil and gas industry. Another valued portfolio item, Vespel® CR-6100 parts, have proven in the field their ability to perform as back-up rings in a wide range of high-pressure pumps used in hydrocarbon processing and refining. Vespel® CR-6100 parts outperform those made from alternative materials such as polyetheretherketone (PEEK) in several ways. These include higher temperature resistance, more mechanical strength and nearly universal chemical resistance. Moreover, they are recognized under the latest edition of the ISO 13709 International Standard and the American Petroleum Institute’s API 610 Standard.

Both Kalrez® 0090 and Vespel® CR-6100 parts build on more than 30 years of DuPont experience in meeting the needs of the oil and gas industry for high-performance parts.

For more information about Kalrez®, call 800-323-9806 or visit kalrez.dupont.com on the web. For more information about Vespel®, call 800-222-8377 or visit vespel.dupont.com.

DuPont is a science-based products and services company. Founded in 1802, DuPont puts science to work by creating sustainable solutions essential to a better, safer, healthier life for people everywhere. Operating in more than 70 countries, DuPont offers a wide range of innovative products and services for markets including agriculture and food; building and construction; communications; and transportation.

The DuPont Oval Logo, DuPont™ , The miracles of science, Kalrez® and Vespel® are registered trademarks or trademarks of DuPont or its affiliates.

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Donna Swain
DuPont
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