All issues Volume 72 / No 5 (September–October 2017) Oil & Gas Science and Technology - Rev. IFP Energies nouvelles, 72 5 (2017) 27 Full HTMLDynamic characteristics of the mechanical jar.
| Rock pressure forces | Strike duration | Energy | Number of strikes |
|---|---|---|---|
| Pst (kN) | τ (ms) | E (MJ) | Nud |
| 120 | 6 | 0.67 | 887 |
| 114 | 21 | 0.22 | 247 |
| 108 | 36 | 0.50 | 140 |
| 102 | 52 | 0.69 | 92 |
| 95 | 64 | 0.75 | 64 |
| 88 | 124 | 1.56 | 24 |
| 82 | 143 | 1.97 | 20 |
| 75 | 203 | 3.66 | 13 |
| 68 | 254 | 6.73 | 8 |
| 38 | 256 | 8.45 | 4 |
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