9'' spiral drill collar!
OD: 9'' spiral drill collar
ID: 2-13/16''
Material: 4145H
Length: 31''
Weight: 2.8 tons/joint
It can reduce the contact area with the drilling well wall, thus effectively reducing the possibility of differential pressure blockage. The reason why auger drill collars are widely used is due to their own characteristics. This special auger drill collar can reduce the contact area between the well wall and the pipe body, thereby avoiding the "sticking" phenomenon of the drill string.
The weight of spiral drill collars is 4-6% less than that of round drill collars.
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