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Full Opening Safety Valve(FOSV）

Full opening safety valve is a hand control valve in drill string circulating system and it is one of the effective tools to prevent blowout In the drilling operation. Drilling Tools

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Describe

Full opening safety valve is a hand control valve in drill string circulating system and it is one of the effective tools to prevent blowout In the drilling operation. In order to avoid malignant accidents, full opening safety valve shall be connected between drill pipe in drilling operation. The special wrench of full opening safety valve rotates 90deg switch can be achieved on and off. And when need to lift the drill pipe or Kelly has not be lifted as precaution, it is the best to install full opening safety valve

Specifications
型號 Model	外徑 O.D.mm(inch)	內(nèi)徑I.D.mm(inch)	螺紋類型Connection API	工作壓力 Working Pressure
QK89-T30	89 (3 1/2)	30 (1 3/16)	NC26	35Mpa,70Mpa
QK119-T50	119 (4 3/8)	50.8 (2)	NC31 2-3/8 EUE	35Mpa,70Mpa
QK135-T62	135 (5 5/16)	62 (7 5/16)	NC38 2-7/8 EUE	35Mpa,70Mpa
QK140-T62	140 (5-1/2)	62 (7 5/16)	NC40 2-7/8 EUE	35Mpa,70Mpa
QK159-T62	159(6 1/4)	62 (7 5/16)	NC46	35Mpa,70Mpa
QK168-T76	168 (6 5/8)	76 (3)	NC50 3-1/2 EUE	35Mpa,70Mpa
QK178-T76	178 (7)	76 (3)	5-1/2 FH 3-1/2 EUE	35Mpa,70Mpa
QK190-T82	190 (7 1/2)	82 (3 1/4)	5-1/2FH 4-1/2EUE	35Mpa,70Mpa
QK203-T101	203(8)	101 (4)	6-5/8 REG 4-1/2 EUE	35Mpa,70Mpa

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