The single roller bit is composed of a single cone and a lug matched by a bearing.According to different strata and construction requirements, different cutting struclures can be selected; wear resistant carbide are welded and cemented carbide inserts are inserted on the back of the lug.
Rotary drilling rig drives the shaft to rotate and exert positive pressure so that the rotary dril- ing bit can impact, roll and shear the rock. Crush the rock to form a crushing ring zone.Then break the middle pillar by the swing of the shaft and take the broken pillar out to form a hole.
Product Feature:
♦ Straight handle welded type
It is installed on the well bore by welding, and it is a gradually transformed structure in China at present. The palm of the structure is solidly welded and not easily loosened.The regular shape welding quantity is relatively small and the control accuracy of welding angle and position is improved.
♦ Straight shank removable type
ls a new installation method, which welds the matching fixture to the wellbore and then fastens the rotary drill bits to the wellbore by bolting. The palm disassembly and replacement of the structure is efficient, and the installation dimension and angle control are accurate. However, pre-welding fixture is required, and the matching fixture also needs to be replaced after wear, and the fixture can not adapt to all manufacturer srotary drill bit.
