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Oilfield Ball Valve Failure

A ball valve mounted on a wellhead failed during an oil field operation.  This ball valve failure resulted in a fire and fatality. An overall view of the failed ball valve is shown in Photograph A.

Overall view of Failed Ball Valve
Photograph A Failed oil field ball valve.

A metallurgical failure analysis of the ball valve revealed that very minimal mating between the subject ball keeper threads and the ball valve body threads. This indicated a physical size discrepancy and thus, a defect in cutting the ball valve body threads during manufacturing and therefore was considered a manufacturing defect.

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J.E.I. Metallurgical, Inc.

5514 Harbor Town
Dallas, Texas 75287

Phone: (972) 934-0493
Fax: (469) 737-3938
Email: r.c.jerner@metallurgist.com

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