Research Article
Design for Reliability of Complex System: Case Study of Horizontal Drilling Equipment with Limited Failure Data
Table 7
Combined failure rates for final design alternatives.
| Component | Failure rate (*10−6) | Component | Failure rate (*10−6) | Combined failure rates for final design (*10−6) |
| Inductive drive motor | 6.6 | Hydraulic pump | 34.1 | 226 | Electrical pump | 34.0 | 226 | Pneumatic pump | 25.8 | 171 | Vacuum pump | 45.4 | 301 |
| Diesel drive motor | 128.7 | Hydraulic pump | 34.1 | 4386 | Electrical pump | 34.0 | 4400 | Pneumatic pump | 25.8 | 3319 | Vacuum pump | 45.4 | 5848 |
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