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.
Select tungsten carbide inserts 3/16" thick are standard
Carbide inserts are individually hand soldered using nickel silver rod
Bits fabricated are welded with high tensile strength 7018 rod
Drag bits are welded solid at the nose for durability
Blades originate from 4140 heat-treated tool steel forgings
Forgings are milled to better seat the carbide inserts
Relief is hand ground behind carbide inserts for maximum performance
Bits can be built to the gauge tolerances required
Chevron bits are designed for medium to hard formation and are used in areas that contain a lot of rock and also in the oilfield for drilling out concrete casings and plugs.
Chevron drag bit: three wings chevron drag bit, four wings chevron drag bit;
Drag bits diameter:76mm to 445mm;
Drag bits thread sizes::2 3/8” API Reg, 3 1/2” API Reg, 4 1/2” API Reg, 6 5/8” API Reg, etc;