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Variety of Connections


The connections which are manufactured with forging blanks are used to transfer the components of drill pipe in petroleum and gas drilling. They are disposed of in all-around quenching and backfire and inspected with all-sectional ultrasonic, its mechanical capability can achieve: σb≥965Mpa;σ0.2≥760Mpa;σ4≥13%;Akv≥54j;HB=285—341
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 off 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, change of position, side turning and deviation control in straight well.

External diametermm

Internal diametermm

connection

Bend angle

o

Length

mm

Lining Diameter

mm

Internal thread

External thread

159

66

NC46

4-1/2REG

12.5

715

50

197

80

5-1/2 IF

5-1/2 IF

12.5

760

50


B. Drill pipe adapter

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