... well, oil field, underground, construction, geothermal, directional boringDescription: 1> Cutting structureIn response to the characteristics that inserts in different ... , so it can receive higher WOB and high reliability.4> Hydraulic DesignSmall angled water course design increased the shirttail ... , 6174 1/2114.3517, 527, 537, 6174 5/8117.5517, 527, 537, 6174 3/4120.6517, 527, 537, 6175 7/8149.2517 ...