Drop-In Check valve
Drop-In Check valves prevent return flow during a kick and are suitable for most drilling situations in which return flow through the drill string is a risk and normal operation requires the benefits of a full-bore sub.By preventing upward flow through the drill pipe and allowing fluid to be pumped downward to circulate the well, the valves provide the driller with the means to control the drill pipe pressures when required, significantly improving and simplifying well control.
When a blowout is about to happen,the thread connections of the kelly is screwed out immediately and a check valve is placed into the drill pipe and then pumped downward to the required place.Thus the blowout can be prevented.
When ordering please specify:
●Smallest bore in drill string through which the check valve must pass.
●Landing sub connection size and type.
●Outside diameter of mating tool joints.
Available model:
FT89 FT105 FT121 FT159 FT168 FT178 FT203
Specifications - Drop-In Check valve
1 Drop-In Check valve FT89 34 89 31 35(70) NC26
2 Drop-In Check valve FT105 34 105 31 35(70) NC31
3 Drop-In Check valve FT121 50 121 46 35(70) NC38
4 Drop-In Check valve FT159 54 159 50 35(70) NC46
5 Drop-In Check valve FT168 68 168 64.5 35(70) NC50
6 Drop-In Check valve FT178 68 178 64.5 35(70) 5 1/2 FH
7 Drop-In Check valve FT203 68 203 64.5 35(70) 6 5/8 REG
