Float Sub
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Float subs are drilling tools that have a body that features a one-way check valve to prevent drilling fluid and particles from flowing backwards during drilling operations.
Specifications| Type | Sub O.D (mm) | Joint thread | Valve O.D (mm) | I.D (mm) |
| 241.3 | 7 5/8 REG | ф121 | ф76 | |
| 228.6 | 7 5/8 REG | ф121 | ф76 | |
| 209.6 | 6 5/8 REG | ф121 | ф76 | |
| 203.2 | 6 5/8 REG | ф121 | ф71 | |
| 177.8 | 4 1/2 IF | ф98 | ф71 | |
| 165.2 | 4 1/2 REG | ф88 | ф57 | |
| 146 | 4 1/2 REG | ф88 | ф57 | |
| 121 | 3 1/2 REG | ф61 | ф51 | |
| 108 | 3 1/2 REG | ф61 | ф38 |
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