Series 3000 coupling set is equipped with series 3000 diesel engine and hydraulic coupling.It has the features of high transmission efficiency,good performance,low auxiliary power consumption,long service life,easy in operation and installation,compact design and light weight as well as suitable for frequent transport of drilling machine.The coupling set has the transmission efficiency of over 95% with reduction ratio of 1.5-3.5.It is the ideal power set for oil field machinery and engineering equipment.