The description of 8 1/2 diamond PDC water well drilling bits.
8 1/2 diamond PDC water well drilling bits are a kind of PDC drilling bit that is very popular in the drilling tools market. Because of the regional differences, some will call diamond PDC water well drilling bits. These diamond PDC water well drilling bits can be matrix body PDC drilling bit and steel body PDC drilling bit, the buyer can choose according to the requirements.
8 1/2 Diamond PDC Water Well Drilling Bits are designed to drill at high penetration rates. Its cutting structure equips with Hardened Alloy Steel; High performance PDC Cutters; Carbide and Diamond gauge protection; Carbide/Diamond Shock Studs; Threaded or Plain Carbide Nozzles for Flushing.
The diameters of Diamond PDC Well Drilling Bits are as follows: 3 7/8inches (98mm), 4 5/8 inches (118mm), 5 7/8 inches (149mm), 6 inches (152mm), 6 1/2 inches (165mm), 7 1/2 inches (190mm), 7 7/8 inches (200mm) ,8 1/2 inches (216mm) ,9 1/2inches (241mm) ,9 7/8inches (250mm) ,10 5/8 inches (269mm) ,11 5/8inches (295mm) ,121/4inches (311mm) ,13 5/8inches (346mm) ,15 1/2 inches (393mm) ,16inches (406mm) ,17 1/2inches (445mm) ,26inches (660mm) (76mm-660mm) etc.
The specifications of 8 1/2 diamond PDC water well drilling bits.
| PDC Bit Size | 8 1/2″ |
| Number of Blades | 5 |
| Primary Cutter Size | 16MM |
| Nozzle Qty/Type | 7 |
| Gauge Length | 2″~3.5″ |
| Connection | 4 1/2 REG PIN |
| Rotary Speed(r/min) | 60~250 |
| Weight on Bit(KN) | 10~100 |
| Flow Rate(lps) | 25~36 |
PDC Drilling Bit – standard connection sizes
| PDC dill bit Size(inch) | API pin(inch) | Recommended torque(kn.m) |
| 4 1/2 to 4 3/4 | 2 7/8 api | 6.0~7.5 |
| 5 1/8 to 7 3/8 | 3 1/8 api | 9.5~12 |
| 7 1/2 to 9 3/8 | 4 1/2 api | 16.0~22 |
| 9 1/2 to 14 1/2 | 6 5/8 api | 38~43 |
| 14 5/8 to 17 1/2 | 7 5/8 api | 46~54 |