Description
For drilling in soft formations, three or four-wing drag bits are available with either stepped or chevron profiles. Also available in certain sizes are replaceable wing drag bits.
| Drag bit size range and connection type | ||
| Diameter (inches) |
Connection Pin Type |
Possible Configuration |
| 1.7/8″ – 2.1/2″ | AW or A rod | C3 |
| 2.3/4″ | AW or A rod | C3 |
| 2.7/8″ | AW or A rod | C3 |
| 2.3/4 – 3.1/2″ | N rod | C3, C4, S3 |
| 3.5/8 – 4.3/4″ | 2.3/8″ API Reg | C3, C4, S3 |
| 5″ | 2.3/8″ API Reg | C3, C4, S3 |
| 5.1/8″ | 2.3/8″ API Reg | C3, C4, S3 |
| 5.1/4 – 5.1/2″ | 2.3/8″ API Reg | C3, C4, S3 |
| 5.5/8″ | 3.1/2″ API Reg | C3, C4, S3 |
| 6 – 6.3/4″ | 3.1/2″ API Reg | C3, C4 |
| 6 – 6.3/4″ | 2.3/8 API Reg 3.1/2″ API Reg |
S3 |
| 7 – 8″ | 3.1/2″ API Reg | C3 |
| 7 – 12.1/4″ | 3.1/2″ API Reg 4.1/2″ API Reg |
S3 |
| C3 = Chevron-type 3-wing; C4 = Chevron-type 4-wing; S3 = Step-type 3 wing. | ||