| Instrument | Plugging slurry | Crack width/mm | Pressure changes in mud tanks at different flowback pressures | ||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | |||
| TL-1 | 1# | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 7 |
| Traditional instrument | 0 | 2 | 3 | 4 | 5 | 6 | 7 | ||
| TL-1 | 2# | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 7 |
| Traditional instrument | 0 | 0 | 3 | 4 | 5 | 6 | 7 | ||
| TL-1 | 3# | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 6.5 |
| Traditional instrument | 0 | 0 | 3 | 4 | 5 | 6 | 7 | ||