Complaint
1. The mechanical locking mechanism prevents unnecessary wear of the internal parts during the working process, and improves the workinglife.
2. The mechanical locking mechanism is functional safety and reliability, which is made by special process. The frictionresistance is small,and the lockingforce is linear stability.
3. The locking mechanism can avoid the failurejarring caused by misoperation when connect simple root to the drill string or contact the hole bottom.
Product ParametersModel | QYSZIII 108 | QYSZIII 121 | QYSZIII 165 | QYSZIII 203 | QYSZIII 241 | |
OD in(mm) | 109 | 122 | 167 | 206 | 244 | |
ID in(mm) | 38 | 50.8 | 57(70) | 76 | 76 | |
Working temperature ºC | 150 | |||||
Tensile strength (KN) | 1350 | 1950 | 3750 | 6230 | 8500 | |
Torsional strength (KN·m) | 16 | 25 | 70 | 135 | 165 | |
Unlocking Force (KN) | Up jarring | 160±25 | 180±25 | 420±25 | 425±25 | 425±25 |
Down jarring | 70±25 | 80±25 | 180±25 | 205±25 | 205±25 | |
Maximum release force (KN) | Up jarring | 250 | 350 | 700 | 1000 | 1250 |
Down jarring | 120 | 180 | 350 | 500 | 650 | |
total stroke in(mm) | 20 7/8 | 25 | ||||
530 | 630 | |||||
