Drill Pipe Float Valve
Float Valve Sub
Float valve sub is an important tool in petroleum exploration and drilling engineering. The float valve sub is connected at upper part of drill bit, the float valve assembly in sub is near the bit connecting thread and the float valve sub also can be necessary postion of drill string. The main application is when connect with single piece pipe, to prevent mud coming in, mud up returning and blocking hole. When blowout takes place, blowout in drill string will be avioded because nozzle is closed automatically by valve cap for float valve assembly.
Float valve subs are available in two models:
VALVES MODEL''F''PLUNGER TYPE
VALVE MODEL''G'' FLAPPER TYPE
For a correct choice of float valves depending on API connection, consult the following table:
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