A drag bit is a drill bit usually designed for use in soft formations such as sand, clay, or some soft rock. However, they will not work well in coarse gravel or hard rock formations. Uses include drilling water wells, mining, geothermal, environmental and exploration drilling. Whenever possible, they should be used to drill pilot holes because they produce cuttings that are easiest to log.
Step type bits are the most common type of drag bit used in the world today. They are primarily designed for soft to medium formations.
Size | Type Pin | Wt. (lbs.) |
2 3/4" - 3 1/2" | 4 THD N - Rod | 3 1/2 |
2 5/8" - 4 3/4" | 2 3/8" API | 5 1/2 |
4 7/8" - 5 1/8" | 2 3/8" API | 7 |
5 1/4" - 5 1/2" | 2 3/8" API | 8 |
5 5/8" - 6" | 2 3/8" API | 8 |
6 1/8" - 6 1/4" | 2 3/8" API | 8 1/2 |
6 1/2"- 6 3/4" | 2 3/8" API | 9 |
5 1/2" - 6 3/4" | 3 1/2" API | 22 |
6 7/8" - 7 7/8" | 3 1/2" API | 23 |
8" - 9" | 3 1/2" API | 24 |
9 1/8" - 10 7/8" | 3 1/2" API | 25-30 |
7 7/8" - 8 7/8" | 4 1/2" API | 40 |
9" - 9 7/8" | 4 1/2" API | 42 |
10" - 10 7/8" | 3 1/2" API or 4 1/2" API | 45 |
11" - 12 1/4" | 3 1/2" API or 4 1/2" API | 50 |
About Us
Hejian Wanxiang Drilling Equipments Co., Ltd. is a professional supplier of drilling tools and equipments in China. With flexible company structure and advanced technology, we have dedicated ourselves to supply the drilling industry with the best products available.
We take pride in offering prompt, courteous service to all facets of the Oilfield, Water Well, Mining and Construction Industries. We look forward to working with you to establish mutually beneficial relationship!