Tungsten Carbide Drill Body Effect

Upper tungsten carbide drill core body is threaded connection pipe, drill lateral part on a sink, bottom lip surface also opened outlets. Sink and are guaranteed circulation of fluid intake, reaching exclusion rock powder and cool the drill bit role. In order to increase the gap in the inner and outer sidewalls of the hard alloy welding on the drill when drilling clay and shale formations ribs, said ribs drill bit. In the highly abrasive formations can use a hard needle autogenous grinding tungsten carbide drill bit. Generally hard alloy drill rock drilling Drillability as a Ⅶ grade Ⅱ formation; needle tungsten carbide drills can drill a Ⅷ Ⅵ grade rocks.