The coring tools are used for acquisition of the rock core in petroleum drilling . Everytime one to three sections of inner barrels and outer barrels can be run in core drilling. They can be applied in soft, moderate and rigid rock formations. The series of tools manufactured are as followed: Qing 84-I type ,Chuan 8-3 type, Chuan 8-4 type .
Technical parameters and specifications
| Series |
Type |
Outer barrel size(mm) |
Inner barrel size(mm) |
Section
Length
(mm) |
O.D. of
Core
(mm) |
Hole size
(mm) |
O.D. I.D.
Wall thickness(mm) |
O.D.I.D.
Wall thickness(mm) |
| Qing84-I |
Q84-I |
 18014418 |
1271089.5 |
9000 |
101.6 |
216-245 |
| Chuan 8-3 |
CQ83 |
18014418 |
1271127.5 |
9000 |
105 |
216-245 |
| CQ83 |
18014418 |
1271127.5 |
9000 |
105 |
216-245 |
| Chuan 7-4 |
CQ172 |
17213618 |
1271058.0 |
9000 |
101.6 |
190-245 | |
