Float Valve Sub
Float Valve Sub is usually connected on the top of the bit to control down hole liquid.
While stopping pump and connecting with single,
it can prevent waterhole from being plugged by reflowing drillings.
When blowout occurrs, it can serve as splash valve to prevent liquid
flowing into drilling tools.Its structure is divided into plate type float sub and
arrow-type float valve sub.
While stopping pump and connecting with single,
it can prevent waterhole from being plugged by reflowing drillings.
When blowout occurrs, it can serve as splash valve to prevent liquid
flowing into drilling tools.Its structure is divided into plate type float sub and
arrow-type float valve sub.
|
Type
|
O.D. (mm)
|
(mm)
O.D. of Float Valve Core
|
(mm)
I.D. of Float Valve Core
|
Joint Thread
|
|
FJT108
|
108
|
61
|
32
|
3 1/2″REG
|
|
FJT121
|
121
|
61
|
38
|
3 1/2″REG
|
|
FJT146
|
146
|
88
|
50
|
4 1/2″REG
|
|
FJT165
|
165
|
98
|
71
|
NC50
|
|
FJT178
|
178
|
98
|
71
|
NC50
|
|
FJT203
|
203
|
121
|
76
|
6 5/8″REG
|
|
FJT209
|
209
|
121
|
76
|
6 5/8″REG
|
|
FJT228
|
228
|
121
|
76
|
7 5/8″REG
|
|
FJT241
|
241
|
121
|
76
|
7 5/8″REG
|