Drop-in Check Valve
The drop-in check valve is installed in the drill string to prevent internal blowouts. They are used as a sub above the drill string before the check valve is run in the downhole. Once installed, the valve only allows a downward flow of drilling fluid.
Specifications| Specification | Check Valve Assembly | Valve Sub | Stop Ring | Seal Pressure (Mpa) | Connection API |
| O.D.(mm) | O.D.(mm) | I.D.(mm) | |||
| 33 | 89 | 30 | 35 | NC26 | |
| 36 | 105 | 33 | -70 | NC31 | |
| 50 | 121 | 46 | NC38 | ||
| 54 | 159 | 50 | NC46 | ||
| 68 | 168 | 64 | NC50 | ||
| 68 | 178 | 64 | 5 1/2 FH | ||
| 68 | 203 | 64 | 6 5/8 REG |
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