Ball check valve is a wellhead inside blowout control tool, in order to achieve safety control in drilling operation. It can effectively solve the problem of overflow, well kick in trip-out process. Put it into the well with drill stem and it can control the mud back pressure automatically.
| Model | OD mm(inch)
| ID mm(inch)
| Connection API | Working Pressure MPa(psi)
|
| FQ105 | 104.8(4-1/8)
| 50.8(2)
| NC31
| 35～70 (5,000~10,000)
|
| FQ120 | 127(5)
| 57.2(2-1/4)
| NC38
| |
| FQ127 | 178(7)
| 57.2(2-1/4) | NC38
| |
| FQ165 | 165(6-1/2) | 71.4(2-13/16) | NC50
|