Table 3.
Analysis of potential factors affecting drilling performance related to tools.
| Indicator | Factor | |||
|---|---|---|---|---|
| Safety performance | Convenient maintenance | Man–tool matching | Availability of spare tools | |
| Fault and overload warning | 0.930 | |||
| Use safety | 0.862 | |||
| Sufficient protective tools | 0.844 | |||
| Easy replacement of parts | 0.837 | |||
| Sufficient vulnerable parts | 0.731 | |||
| Manual man–tool matching | 0.817 | |||
| Man–machine adaptive design | 0.762 | |||
| Equipment types sufficient | 0.675 | |||
| Intact function and appearance | 0.955 | |||
Factor extraction standard: initial eigenvalues ≥ 80%; extraction method: principal component analysis.