- Optimization of PDC and roller cutting profiles to enhance the foller function of torque reduction,improving the controllability of the drill bit’s sliding guide surface.
- Analysis of cutting structure force balance design to improve the stability o the drill bit,reduce the stick-slip effect,and enhance the directional performance of the drill bit.
- Combination of shorter gauge design and active/passive gauge retention to improve the build-uprate,lateral cutting performance,and directional controllability of the drill bit.
- Design of multi-point gauge and gauge retention balancing positioning and stabilization structureto improve the stability of the drill bit and its adaptability in directional drilling.
| Formation | Lithology | Bits Selection |
| Soft | Sandstone,Shale,Marlstone | H4192H、H4162D H3193D、H3163D |
| Medium | Limestone,Sandstone,Conglomerate | H4192D、H4162D、 H3193D、H3163D |
| Hard | Tuff,Granite,Siltstone,Dolomite | H4192D、H4162D H3193D、H3163D、 H6163D |