SOD-114-Retrievable Symmetric Casing System by DTH Hammer
Casing O.D.: 114mm
Casing Wall Max: 8mm
Ring Bit I.D.: 82mm
Ring Bit O.D.: 127mm
Pilot Bit O.D.: 91mm
DTH Hammer: 3.5"
Drill Pipe: 76mm
Rock drilling tools manufacturer ProDrill: Retrievable DTH hammer is designed to drill and case a hole simultaneously through unstable ground conditions. The driver rock drill bits incorporated with a satisficial ring or reusable ring makes a full face head design which significantly improves the penetration rate and hole straightness of drilling. The internal flushing grooves together with the built-in casing shoes gives a good seal to the button of the drilling hole, minimizing the disruption of the drill hole's surrounding. 
Application Range: suitable for drilling water wells, geothermal wells, short mircopiles, medium mini-type grouting hole of building, dam and harbor project.
2. Hammer’s percussive energy is transferred through the pilot and ring bits, crushing rock . Part of impact energy advances casing.
4. Drilling continues to the desired depth in the bedrock using a conventional drilling.
SOD-114-Retrievable Symmetric Casing System by DTH Hammer:
Pablo Villalpando –
Good product. I really like it so much.