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...Rdiii proposal and specification package rd iii specifications oil gas general derrick raising cylinder patented carriage feed system breakout wrench drill pipe changer casing hoist jib boom rotation power pack deck engines standard optional compressor hydraulics coolong change air cooling leveling jacks operator console night lights tool cabinet weights dimensions tools equipment xc the is a unique deephole drilling rig designed for applications in lb kg range heart of sys tem this plus structure provide several customer advantages that previously have not been available on machines class two main benefits offers are provides an actual pullback capability boasts with clearances under spindle to handle ill handling eliminates traveling block crown sheaves found competitive raised lowered by cylinders inside carries both pulldown so single wrap cable over normal one travel ratio between rotary head stroke sheave gain mechanical efficiency was unobtainable blocks conventional additional ...