API SPEC 7NRV:2006/ADD 1:2019(R2020)
Current
Current
The latest, up-to-date edition.
Specification for Drill String Non-return Valves, First Edition, Includes Addendum 1 (2019)
Available format(s)
Hardcopy , PDF
Language(s)
English
Published date
17-07-2020
Publisher
This standard was formulated to provide the minimum acceptable requirements for Drill String Non-return Valve (NRV) equipment.
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