GB/T 25429-2010
AbolishedSpecification for drill string non-return valve
钻具止回阀规范
Application Summary AI generated
This standard specifies the technical requirements, testing methods, and inspection rules for drill string non-return valves used in petroleum and natural gas drilling operations. It is applied to prevent backflow of drilling fluids through the drill string, thereby controlling wellbore pressure and reducing the risk of blowouts during drilling, workover, or well control procedures. The standard ensures the reliability and safety of these valves in high-pressure downhole environments.
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