Extended Casing Tong
The extended casing tong is specially designed for making up or breaking out casing pipe and casing joint for big well with large oil output. Similar with other product, the design and production of this item is fully in compliance with API Spec 7K standard.
Possessing same torque arm length and suspender assembly with manual tong type B, this well drilling equipment is engineered for running casing. Drilling well, or making up or breaking out pipe with this extended casing tong (provided with tong jaw for casing pipe) is not recommended. Made of long jaw, short jaw, latch jaw, latch and many hinge jaws, this product can be make up casing pipe with the diameter of 13 3/8"-25 1/2" and 25 1/2"-36" by adjusting the quantity and location of No. 7, No.8 and No.9 hinge jaw.
Technical Parameters
Table I
| Hinge Jaw No. | Applicable Pipe Dia. | Rated Torque | |
| in. | mm | kNm | |
| 9, 8 | 133/8-141/2 | 340-368.3 | 35 |
| 8, 7 | 141/2-16 | 368.3-406.4 | |
| 8, 9, 9 | 16-171/2 | 406.4-444.5 | |
| 8, 9, 7 | 171/2-19 | 444.5-482.6 | |
| 7, 8, 7 | 19-20 | 482.6-508 | |
| 9, 8, 9, 7 | 20-211/2 | 508-546.1 | |
| 9 , 7, 8, 7 | 211/2-23 | 546.1-584.2 | |
| 9, 9, 8, 7, 7 | 24-251/2 | 609.6-647.7 | |
| 9, 8, 7, 7, 7 | 251/2-27 | 647.7-685.8 | |
| 8, 7, 7, 7, 7 | 27-281/2 | 685.8-723.9 | |
| 9 , 9, 8, 7, 7, 8 | 281/2-30 | 723.9-762 | |
| 9, 7, 7, 7, 7, 8 | 30 | 762 | |
Table II
| Hinge Jaw No. | Applicable Pipe Dia. | Rate Torque | |
| in. | mm | kNm | |
| 9, 8, 7, 7, 7 | 251/2-27 | 647.7-685.8 | 55 |
| 8, 7, 7, 7, 7 | 27-281/2 | 685.8-723.9 | |
| 9 , 9, 7, 7, 7, 8 | 281/2-30 | 723.9-762 | |
| 9, 7, 7, 7, 7, 8 | 30-315/8 | 762-803.3 | |
| 8, 9, 8, 9, 7, 7, 7 | 311/2-33 | 800.1-838.2 | |
| 7, 9, 8, 9, 9, 7, 8, 9 | 33-341/2 | 838.2-876.3 | |
| 8, 7, 7, 9, 9, 8, 8, 8 | 341/2-36 | 876.3-914.4 | |
