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 position 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 avoided because nozzle is closed automatically by valve cap for float valve assembly .
When ordering please specify：
- Float valve type (Model F or Model G);
- Float valve size;
- Connection and O.D of sub.
| Model | Sub O.D.(mm) | Joint connection | Valve O.D.(mm) | I.D.(mm) |
|---|---|---|---|---|
| FFJT241 | 241.3 | 7 5/8 REG | ф121 | ф76 |
| FFJT228 | 228.6 | 7 5/8 REG | ф121 | ф76 |
| FFJT209 | 209.6 | 6 5/8 REG | ф121 | ф76 |
| FFJT203 | 203.2 | 6 5/8 REG | ф121 | ф71 |
| FFJT178 | 177.8 | 4 1/2 IF | ф98 | ф71 |
| FFJT165 | 165.1 | 4 1/2 REG | ф88 | ф57 |
| FFJT146 | 146 | 4 1/2 REG | ф88 | ф57 |
| FFJT121 | 121 | 3 1/2 REG | ф61 | ф51 |
| FFJT108 | 108 | 3 1/2 REG | ф61 | ф38 |
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