The current two codes in the passivation feature and position code representation method 1 is not intuitive, omitting some Chinese characters, such as: nozzle drop, abbreviated as / mouth off: expressed as ZT0; second, roller cone bit and PDC bit description The code number indicates that the method is not uniform, such as the wear of the cone and the drop of the nozzle. The representation of the roller bit is CM and ZT. The representation of the PDC bit is MP and PL. The same is true for Pinyin in Chinese. One project, but the results of the two standards are different, and the IADC-API standard uses the WT and LN English abbreviations (weartooth and lostnozzle) to unify the wear and passivation characteristics of the roller cone bit and the PDC bit, achieving a simplified and unified purpose. A description of the evaluation of the sealed bearing should be added to the evaluation of the bearing wear project. In the evaluation standard of roller bit wear, only the evaluation of the wear life of the bearing of the unsealed bearing bit is specified. However, for the sealed bearing bit, there is no indication method for the evaluation of the bearing service life. Therefore, it is recommended that in the bearing wear evaluation method project, Increase the evaluation of the service life of sealed bearing bit bearings, using the representation method in the IADC-API standard, using the English abbreviation letters to indicate the seal bearing wear of the sealed bearing bit, /E0 means the seal is effective, /F0 means the seal is invalid ( Fruitless). Increase the evaluation description of the cause of the drilling. Drilling has a great influence on the evaluation of whether the drill can continue to be used or replaced. However, in drilling operations, the reasons for drilling are various. For example, when the drill bit is used in the later stage, the drilling speed is reduced, and the drilling cost is increased, the drill bit must be drilled, which is normal for the use of the drill bit. Finish)