The arrow back-pressure valve type JF is a sort of pipe inside blowout preventer. It adopts arrow valve structure. It's directly connected to drill stem, and can prevent high-pressure oil stream from blowing out from drilling tool.
Specification Series and Performance Parameters
Type
|
O.D.
mm (in.)
|
I.D.
mm (in.)
|
Overall Length
mm (in.)
|
Connection
API
|
JF86
|
86 (3 3/8)
|
34 (1 5/16)
|
400 (15.75)
|
NC26
|
JF105
|
105 (4 1/8)
|
45 (1 3/4)
|
400 (15.75)
|
NC31
|
JF121
|
121 (4 3/4)
|
57 (2 1/4)
|
500 (19.69)
|
NC38
|
JF152
|
152 (6)
|
74 (2 15/16)
|
500 (19.69)
|
NC46
|
JF162
|
162 (6 3/8)
|
83 (3 1/4)
|
550 (21.65)
|
NC50
|
JF184
|
184 (7 1/4)
|
83 (3 1/4)
|
550 (21.65)
|
5 1/2FH
|
No comments:
Post a Comment