Three wings drag bits/Tungsten carbide drag bit/Water well drill
Product description:
Drag bits also named blade bits, with a TC inserts on the blades.
They are usually designed for use in soft formations such as sand, clay, or some soft rock.
Their uses include drilling water wells, mining, geothermal, environmental and exploration drilling.
Usually drag bits are three wings, while sometime people need four wings or five wings.
Other special design is available upon your request.