Full Opening Safety Valve
Full Opening Safety Valve

Full Opening Safety Valve

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 pipes in drilling process. The special wrench of full opening safety valve may rotate
90 °according instruction to switch on and off. In well repair operation, whether need to lift the drill pipe or not, it is best to install opening safety valve as prevention.

Specification

Model

OD
mm(inch)

ID
mm(inch)

Conn.

Working Pressure
(MPa)

Qk79

3 1/8 (79)

4/5 (20)

2 7/8HTPAC

35,70,105

QK89

3 1/2 (89)

1 3/16 (30)

NC26

QK111

4 3/8 (111)

1 37/64(40)

NC31

QK121

4 3/4 (121)

1 31/32(50)

NC38

QK127

5 (127)

QK133

5 1/4(133)

2 23/64(6O)

NC40

QK159

6 1/4(159)

2 51/64(71)

NC46

QK165

6 1/2(165)

2 13/16(71.4)

NC50

QK168

6 5/8(168)

QK190-1

7 1/2 (190)

3(76.2)

5 1/2FH

QK190-2

7 1/2 (190)

3 15/64(82)

NC50

 


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