There are three types of DU series Drill Pipe Slips: DU, DUL and SDU. They are with large handling range and light weight. SDU slips have larger contacting areas on the taper and highter resistance strength. They are designed and manufactured according to API Spec 7K Specificaton for drilling and well servicing equipment.
| Type | Pipe OD | Inserts | ||||
| Size(in) | Part No. | Qty. | (lbs) | |||
| DU | 4-1/2 | 3-1/2 | 3-1/2 | TDT7613-C-82 | 18 | 150 |
| 4 | 4 | TDT7613-FF-81 | 18 | 141 | ||
| 4-1/2 | 4-1/2 | TDT7613-A-81 | 18 | 136 | ||
| 5-1/2 | 4-1/2 | 4-1/2 | TDT7613-E-81 | 18 | 164 | |
| 5 | 5 | TDT7613-G-81 | 18 | 159 | ||
| 5-1/2 | 5-1/2 | TDT7613-H-81 | 18 | 146 | ||
| 7 | 5-1/2 | 5-1/2 | TDT7613-Z-81 | 18 | 190 | |
| 6-5/8 | 6-5/8 | TDT7613-DD-81 | 18 | 164 | ||
| 7 | 7 | TDT7613-EE-81 | 18 | 154 |