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Cross-over sub acts for conversion and connection of drill stem component in petroleum , natural gas and geology drilling work.
They are disposed of in all-around quenching and backfire and inspected with all-sectional ultrasonic, its mechanical capability can achieve: σb≥965Mpaσ0.2≥760Mpaσ4≥13%Akv≥54jHB=285341
A. Fixed angle bending sub:
Bending sub is one of the most important tools for driving drilling tools for angle building. It makes the drilling tools bend and elastically deformed to offer the drill bit a side force and make it build angle, drop angle or change position so as to achieve the purpose of angle building, azimuth change, side turning and deviation control in straight well.
Specification List:
O.D.(mm) |
I.D.(mm) |
CONNECTION |
Bending angle |
Length |
Lining I.D. |
|
Internal thread |
External thread |
(o) |
(mm) |
(mm) |
||
159 |
66 |
NC46 |
4-1/2REG |
1~2.5 |
715 |
50 |
197 |
80 |
5-1/2 IF |
5-1/2 IF |
1~2.5 |
760 |
50 |
B: Drill stem cross-over sub
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