Development of Top Drive Rig 400V/600V Power Supply System

The top drive drilling rig is a kind of drilling equipment which drives directly rotary drilling tool,completes circulation of drilling fluid,connection of drill pipe,tightening and loosing drill stem and drawn down to finish variety of drill operation by means of power from electric motor installed on derrick top.Electric control system of top drilling rig adopt imported AC motor,which is the special-class 600 volt power supply system driven by AC alter frequency motor.Because there is no domestic manufacture on which the special 600 volt power supply system was produced,all of drilling crew had to import diesel generator with 600 volt power source while introduction of top drive drilling rig from oversea,which lead to longer periods,high cost,complicated maintenance procedure,financially restricting of the upgrade of oil rig drilling due to cost and long period.The transformer station made in our factory can transfer 400V into 600V power supply stably and reliably by using existing generator.In additional,this kind of power system(400V/600V) is accessed to system grid conveniently,effectively and securely and is easy to provide power for drilling rig working and to save drilling cost.