API SPEC 7NRV(R2020)

Detailinformationen

Bezeichnung: API SPEC 7NRV(R2020)

Ausgabedatum: 01.07.2006

Seiten: 26

Land: Amerikanische technische Norm

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Annotation

This standard was formulated to provide the minimum acceptable requirements for Drill String Non-return Valve (NRV) equipment. It covers Drill String Non-return Valves, Non-return Valve Subs, Non-return Valve landing nipples, Non-return Valve Equalizing Heads and all components that establish tolerances and/or clearances which may affect performance or interchangeability of the NRV equipment. Non-return Valve Subs, Non-return Valve landing nipples, Non-return Valve Equalizing Heads and NRVs manufactured by different facilities or manufacturers may be supplied as separate items. See more
Reaffirmed: 2020