The coring tools are used for acquisition of the rock core in petroleum drilling. From one to three inner barrels and outer barrels can be connected as an integral tool in core drilling. It can be applied in soft, moderate and rigid rock formations. The series of tools manufactured are as followed: Qing 84_I type, American 250P series. Chuan 8-4type, Chuan8-3 type, Chuan 7-4 type.Series Type Outer barrel size(mm) Inner barrel size (mm) Section Length (mm) O.D of Core (mm) ID. (mm) OD × ID ×Wall Thickness OD × ID ×Wall Thickness Qing84-I 84--I φ 180 ×φ 144×18 φ 127× φ 108×9.5 9000 101.6 203~245 250P( USA ) 63/4 × 4 ″ φ 172 ×φ 136×18 φ 121 ×φ 105×8.0 9000 101.6 190~216 Chuan8-4 CQ ×84 φ 180 ×φ 136×18 φ 127 ×φ 112×7. 5 9000 105 203~245 CQ×8105 φ 180 ×φ 144×18 φ 127 ×φ 112×7. 5 9000 105 203~245 Chuan 8-3 CQ×83 φ 180 ×φ 144×18 φ 127 ×φ 112×7. 5 9000 105 203~245 Chuan 7-4 CQ172 φ 172 ×φ 136×18 φ 121 ×φ 105×8.0 9000 101.6 190~216
