Drilling Large Dia Boreholes :
Our company has invested a lot of time and money in drilling large dia boreholes and experimented with almost all types of drilling methodology. After 5 years of research and development, we had finally achieved drilling large dia boreholes up to 2 mtr Dia and 300 mtr depth. We are proud to announce that our company is the first company to achieve in drilling large dia borehole to the depth 300mtr in India by using THH ( Top Hole Hammer ) Cluster Hammer Reamer and Raise Boring system. We had our own Manufacturing Company to design patent pending THH Cluster Hammer which is effective in drilling up to 2 mtr Dia hole through raise boring mechanism. Our company designs custom hammers and rigs which is suitable to site and performs the job, this keep us attaining high success rate. We have worked with reputed companies and delivered successful works on time.
Concept of Raise Boring :
Raise boring is widely adopted methodology for drilling large dia boreholes in underground mines. The methodology consists of drilling Pilot hole and enlarging the hole further by using Reamers. Pilot Hole ( Step 1): Pilot Hole is drilled by using conventional pnuematic DTH drilling to reach the lower level. Typical diameter for Pilot Hole varies from 125mm to 200mm depending on the target diameter. The cuttings from the borehole is removed by using high pressure air.
Raise Borer (Step 2):
After reaching the lower level a reamer ( Cluster Hammer ) head is attached to the drill rods. Then the cluster hammer is rotated and simultaneously hammered upwared to the ground. The combination of hammering and rotating would break the rock easily.