NRB provides clients with a complete service, from their choice of drill bits to the analysis of drilling results. The company’s engineers analyse customer requests and provide the ideal selection of drill bits to fulfill clients every specific need, including: 1. Drilling: oil and gas, exploration and appraisal wells; and artesian. .
NRB’s special wear-resistant composite materials coating and unique design allows for both tungsten carbide inserts (TCI) and steel. .
NRB’s high-tech polycrystalline diamond cutters (PDC) drill bits are designed for water, oil, gas and geothermal well drilling. Highly durable steel reinforced with polycrystalline.
[pdf] A Pile Top RCD fitted with a 2-metre diameter drill bit is estimated to be capable of “mining” about 7 tonnes of Ore per hour. The Pile Top RCD is capable of drilling holes with inclinations from 90 o (vertical) to 72 o. The working deck has variable geometry to keep it level.
[pdf] Compared with the drill and blast method, TBM tunnelling has significant advantages with high construction efficiency, low project cost, conducive to environmental protection, favorable stability contr.
[pdf] 
