Product Description
This 75 mm concave three-wing drag bit converts to 2.95 in and is intended for water-well, grouting, or exploration holes in soft formations and uncemented ground. Three fixed wings spread scraping contact around a concave center, giving the bit a defined lead point without cones or bearings. Compare its water-well role in the water-well drilling archive and check suitable ground through the unconsolidated formation archive.
The media filename identifies carbide cutting elements and a 75 mm concave body. Each wing should be inspected for equal edge height, secure carbide, and consistent gauge. A three-wing head can move soft cuttings effectively when circulation keeps the face clear, but its fixed geometry has no rolling relief when a hard clast enters the path. The connection is not encoded in the filename, so measure and verify the shank before matching it to a drill string. Inspect the concave center for packed material after each trial, since an obstructed lead area can raise torque and make the outer wings appear duller than they are.
Operate with low WOB and 100–250 RPM. Adjust feed only while penetration remains smooth and torque does not pulse. The supplied facts give no numerical drag-bit flow range, so circulation must be set from returns rather than an invented figure. The bit is not suitable for granite, basalt, quartzite, or gravel dominated by hard cobbles. Water-well practice resources are available from the National Ground Water Association. When hard fragments control performance, use a tricone or button/DTH option matched to their hardness.
