“Blue Whale 1,” the world’s largest and most advanced ultra-deep-water semi-submersible drilling rig was built by Yantai CIMC Raffles Offshore Limited in east China's Shandong Province. The 42000-ton oil platform has cost $700 mil. more
[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] Water well drillers sink wells into the earth to tap natural water supplies. They drill agricultural wells for irrigation, commercial or industrial wells, and wells for homes that are not served by municipal water sy.
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