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Extremely Hard Hughes Christense Style "Model" S279 S279
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- Model: S279
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| Manufacturer, Bit Name/Model Number | IADC Code | Size Range (in) | Recommended WOD (lb/in diameter) | Recommended Rotary Speed (RPM) | Special Features/Usage |
| C23 | M713 | 4-3/4" X 12-1/4" | 500-3500 | 60-500 | Round M |
| DN-302 | M713 | 4 1/2-4 3/4, 5 1/2-6 1/2 | 300-3500 | Variable | Custom |
| DN-332 | M713 | 4 1/2-4 3/4, 5 1/2-6 3/4 | 300-3500 | Variable | Custom |
| DN-422 | M712 | 1 3/4, 1 7/8, 2 1/8, 2 1/4, 2 7/16, 3 5/8, 4 1/2, 4 3/4, 6, 6 1/8, 6 1/4, 6 1/2, 6 3/4 | 300-3500 | 60-600 | ADGHMNR |
| DG-420F | M622 | 1-3/4", 1-7/8", 2-1/8", 2-1/4", 2-7/16", 3-5/8", 4-1/2", 4-3/4", 6-1/8", 6-1/4", 6-1/2", 6-3/4" | 600-3500 | 60-600 | ADGHIMR |
| DN-303 | M713 | 4-1/2" - 4-3/4", 5-1/2" - 6-1/2" | 600-3500 | 60-600 | Custom |
| DN-333 | M713 | 4-1/2" - 4-3/4", 5-1/2" - 6-1/2" | 600-3500 | 60-600 | Custom |
| DN-423 | M722 | 1-3/4", 1-7/8", 2-1/8", 2-1/4", 2-7/16", 3-5/8", 4-1/2", 4-3/4", 6-1/8", 6-1/4", 6-1/2", 6-3/4" | 600-3500 | 60-600 | ADGHMNR |
| DG-420PG | M622 | 1-3/4", 1-7/8", 2-1/8", 2-1/4", 2-7/16", 3-5/8", 4-1/2", 4-3/4", 6-1/8", 6-1/4", 6-1/2", 6-3/4" | 300-3500 | 60-600 | ADGHIMR |
| DN-304G | M813 | 4-1/2" - 4-3/4", 5-1/2" - 6-1/2" | Variable | Variable | Custom |
| DN-334G | M813 | 4-1/2" - 4-3/4", 5-1/2" - 6-3/4" | Variable | Variable | Custom |
| DN-424G | M812 | 1-3/4", 1-7/8", 2-1/8", 2-1/4", 2-7/16", 3-5/8", 4-1/2", 4-3/4", 6-1/8", 6-1/4", 6-1/2", 6-3/4" | 300-3500 | 60-600 | ADGHMNR |
| DN-304P | M813 | 4 1/2-4 3/4, 5 1/2-6 1/2 | 1000-3000 | 60-1000 | Custom |
| DN-424P | M812 | 3/4", 1-7/8", 2-1/8", 2-1/4", 2-7/16", 3-5/8", 4-1/2", 4-3/4", 6-1/8", 6-1/4", 6-1/2", 6-3/4" | 1000-3000 | 60-1000 | ADGHMNR |
| DN405RSP | M812 | 3-1/2" - 8-3/4" | 1000-4000 | 60-120 | Custom |
| DSM | M-811 | 3-7/8" - 12-1/4" | 200-4000 | 60-120 | 0 |
| DT6R | M-713 | 3-7/8" - 8-3/4" | 200-4000 | 60-500 | GHMR |
| DT6X | M-713 | 3-7/8" - 8-3/4" | 200-4000 | 60-500 | GHMK |
| SN-54 | M-811 | 3-7/8" - 12-1/4" | 200-4000 | 80-180 | GHMR |
| DM246 | M843 | 6" - 18-1/2" | 500-4000 | 500-75 | MNDIRWUh |
| TB16 | M713 | 6-1/2", 8-1/2", 12-1/4", 12-1/2" | 300-3000 | 80-1000 | MN |
| TB26 | M713 | 3-3/4", 3-7/8", 5-7/8", 6", 6-1/8", 6-1/4", 6-1/2", 7-27/32", 8-3/8", 8-1/2", 8-23/32", 9-7/8", 12-1/4", 12-3/16" | 300-3000 | 80-1000 | MN |
| TB583 | M713 | 6-1/8" | 300-3000 | 80-1000 | MN |
| TB593 | M713 | 6", 6-1/8", 6-3/4", 8-1/2" | 300-3000 | 80-1000 | MN |
| TBT17 | M634 | 5-7/8", 8-1/2" | 300-3000 | 80-1000 | IMN |
| TT521 | M622 | 5-7/8" - 12-1/4" | 300-3000 | 80-1000 | IMN |
| TT561 | M624 | 4-1/8" - 12-1/4" | 300-3000 | 80-1000 | IMN |
| TT593 | M724 | 3-1/2", 3-3/4" | 300-3000 | 80-1000 | IMN |
| TT521 | M622 | 3-3/4" - 12-1/4" | 300-3000 | 80-1000 | IMN |
| TT561 | M624 | 4-1/8" - 12-1/4" | 300-3000 | 80-1000 | IMN |
| TB16 | M713 | 6-1/2", 12-1/2" | 300-3000 | 80-1000 | MN |
| TBT17 | M634 | 5-7/8", 8-1/2" | 300-3000 | 80-1000 | IMN |
| TBT703 | M734 | 5-7/8", 6", 8-1/2" | 300-3000 | 80-1000 | IMN |
| TT593 | M724 | 3-1/2", 3-3/4" | 300-3000 | 80-1000 | IMN |
| HH152 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HH156 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HH170 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HH172 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HH176 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HH280 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HH336 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HH350 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HH352 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HH354 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HH356 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HH358 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HH370 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HH372 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HH374 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HH376 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HH636 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HH654 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HH676 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHD156 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHD172 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHD352 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHD354 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHD356 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHD358 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHD372 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHD376 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHD378 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHD652 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHDS335 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHDS372 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHDS658 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHDS678 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHS154 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHS352 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHS358 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHS376 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHS378 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHS654 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHS658 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHS672 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| HHS676 | M841 | 3-3/4" - 17-1/2" | 500-3500 | 500-75 | MNDIRWUh |
| S279 | M841 | 4-3/4" - 12-1/4" | 500-3500 | 500-75 | MNDIRWUh |
| S279P | M841 | 4-3/4" - 12-1/4" | 500-3500 | 500-75 | MNDIRWUh |
| S279PX | M841 | 4-3/4" - 12-1/4" | 500-3500 | 500-75 | MNDIRWUh |
| S280 | M841 | 4-3/4" - 12-1/4" | 500-3500 | 500-75 | MNDIRWUh |
| T18 | M614 | 4-3/4" - 12-1/4" | 300-3000 | 500-75 | NR |
| DDR3030 | M843 | 6", 6-1/2", 8-1/2", 12-1/4" | 300-3000 | 80-1200 | MNR Impregnated |
| DDR3035 | M843 | 6-1/2" | 300-3000 | 80-1200 | MNR Impregnated |
| DDR3039 | M843 | 6", 6-1/2", 8-1/2", 12-1/4" | 300-3000 | 80-1200 | MNR Impregnated |
| DDR3043 | M843 | 6", 6-1/8", 8-1/2" | 300-3000 | 80-1200 | MNR Impregnated |
| DDR3054 | M843 | 6", 6-1/8" | 300-3000 | 80-1200 | MNR Impregnated |
| DDR3539 | M838 | 5-7/8" | 300-3000 | 80-1200 | MNR Impregnated |
| DDR3543 | M838 | 4-3/4", 5-7/8" | 300-3000 | 80-1200 | MNR Impregnated |
| DDR4039 | M838 | 7-7/8" | 300-3000 | 80-1200 | MNR Impregnated |
| DDR4530 | M838 | 6-1/2" | 300-3000 | 80-1200 | MNR Impregnated |
| DDR4535 | M838 | 6-1/2" | 300-3000 | 80-1200 | MNR Impregnated |
| DDR4539 | M838 | 5-3/4", 6-1/2", 6-3/4", 8-3/8", 8-1/2", 8-5/8", 10-5/8", 14-3/4", 16" | 300-3000 | 80-1200 | MNR Impregnated |
| DDR4543 | M838 | 6-1/2" | 300-3000 | 80-1200 | MNR Impregnated |
| DDR4554 | M838 | 8-1/2" | 300-3000 | 80-1200 | MNR Impregnated |
| DDR5539 | M843 | 6", 8-3/8" | 300-3000 | 80-1200 | MNR Impregnated |
| DDR5554 | M843 | 6" | 300-3000 | 80-1200 | MNR Impregnated |
| D66 | M713 | 4-5/8", 4-3/4" | 400-4000 | 60-2000 | GMNUhW |
| D72 | M713 | 3-7/8", 3-3/4", 5-3/4", 8-1/2", 12-1/4" | 800-4000 | 60-2000 | GMNKNUhW |
| DST12 | M711 | 3-3/4", 4-3/4", 5-7/8", 6", 6-1/8", 6-1/4", 6-1/2", 7-7/8", 8-3/8", 8-1/2", 8-3/4" | 800-4000 | 60-2000 | GDMNKNUhW |
| K407 | M842 | 8-1/2" | 400-4000 | 60-2000 | GMNUhVW, Impreg |
| K503 | M842 | 4-1/8", 5-5/8", 5-3/4", 5-7/8", 6", 6-1/8", 6-1/2", 6-3/4", 7-7/8", 8-3/8", 8-1/2", 8-5/8", 8-3/4", 9", 10-5/8", 12-1/4" | 400-4000 | 60-2000 | GMNUhVW, Impreg |
| K505 | M842 | 3-3/4", 3-7/8", 5-7/8", 6", 6-1/8", 12", 14-3/4" | 400-4000 | 60-2000 | GMNUhVW, Impreg |
| K507 | M842 | 6-1/2", 8-3/8", 8-1/2", 8-3/4", 12-1/4" | 400-4000 | 60-2000 | GMNUhVW, Impreg |
| K703 | M842 | 4-1/2", 4-3/4", 5-3/4", 5-7/8", 6", 6-1/8", 6-1/4", 6-1/2", 6-3/4", 8-3/8", 8-1/2", 8-3/4" | 400-4000 | 60-2000 | GMNUhVW, Impreg |
| K705 | M842 | 6", 6-1/8", 7-1/2", 7-7/8", 8-1/2", 9-7/8", 12-1/4", 14" | 400-4000 | 60-2000 | GMNUhVW, Impreg |
| K707 | M842 | 6", 6-1/2", 8-1/2" | 400-4000 | 60-2000 | GMNUhVW, Impreg |
| KH1013 | M433 | 8-1/2" | 400-4000 | 60-2000 | GMNUhVW, Impreg |
| KH613 | 6" | 400-4000 | 60-2000 | GMNUhVW, Impreg | |
| KH813 | M433 | 8-1/2", 12-1/4" | 400-4000 | 60-2000 | GMNUhVW, Impreg |
| VH813 | M433 | 6" x 7" - 14-3/4" x 17-1/2" | 50-3000 | 50-400 | DGHMWV |
| VN100 | M614 | 3-1/2" - 17-1/2" | 400-2500 | 50-1000 | GMIKTR |
| VN300 | M714 | 3-1/2" - 17-1/2" | 400-2500 | 50-1000 | GMIKTR |
| VN500 | M814 | 3-1/2" - 17-1/2" | 400-2500 | 50-1000 | GMIKTR |
