整体螺旋加重钻杆是在整体加重钻杆的中间加厚部位延长并铣削螺旋槽。

Integral spiral heavy weight drill pipe is to extend the central upset of heavy weight drill pipe and to cut spiral groove on heavy weight drill pipe.

youdao

整体螺旋加重钻杆是在整体加重钻杆的中间加厚部位延长并铣削螺旋槽。

Integral spiral heavy weight drill pipe is to extend the central upset of heavy weight drill pipe and to cut spiral groove on heavy weight drill pipe.

youdao