There are 92 surface operated, wireline retrievable sub-surface safety valves installed in Amoco (UK) Exploaration Company's portions of the Leman, Indefatigable and Rough Fields. These valves are fail-safe in operation and offer a back-up shut-in safety system to all other safety shutdown devices on a platform. Therefore, each valve is function tested monthly. There are three types of valves in use in these feidls, the bypass type, the ball type and the flapper type. Records covering an eight year period were reviewed to provide data to determine a failure rate for each type of valve. Individual graphs were prepared showing each time a valve was pulled, and these were reviewed and summaries given to show how failure rates were determined. (Kursetz)
Experience with surface controlled sub-surface safety valves
Erfahrungen mit Oberflaechenkontrollierten Unterwasser-Sicherheitsventilen
European offshore petroleum conf. and exhibition, Earls Court ; 1 , Oct ; 257-262
1978
6 Seiten, 1 Bild
Aufsatz (Konferenz)
Englisch
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