Technical specifications and parameters for Top Drive
Specification	250Ton	350Ton	500Ton
Nominal drilling depth (5 1/2" drill pipe)	4,000m(13,000ft)	5,000m(16,000ft)	7,000m(23,000ft)
Rated load capacities	2,250KN(250t))	3,150KN(350t)	4,500KN(500t)
Drilling torque (continuous, max.)	32KN.m	36KN.m	54KN.m
Rotary speed	0 - 180rpm	0 - 180rpm	0 - 220rpm
Rated power of AC induction motor	315 KW x 1	350KW x 1	350KW x 2
Tilt angle of tilt arm ( max)	Forth 30" Back 55"	Forth 30" Back 55"	Forth 30" Back 55"
Maximum torque of break out	50KN.m	65KN.m	80KN.m
Working pressure of hydraulic system	16MPa	16MPa	16MPa
Input voltage of driving cabinet	600VAC	600VAC	600VAC
Range of variable frequency	Rated 0 - 121Hz	Rated 0 - 121Hz	Rated 0 - 121Hz
Shift gears range of motor	0 - 2,400rpm	0 - 2,400rpm	0 - 2,400rpm
Drill pipe range	2 7/8" - 5 1/2"	2 7/8" - 5 1/2"	2 7/8" - 5 1/2"
Alarm Temperature of motor		220degree	220degree
Alarm Temperature of gear oil		75degree	75degree
Alarm Temperature of hydraulic oil		75degree	75degree
Transmission ratio		12.8:1	10.4:1

Shift gears range of motor	0 - 2,400rpm	0 - 2,400rpm	0 - 2,400rpm
Drill pipe range	2 7/8" - 5 1/2"	2 7/8" - 5 1/2"	2 7/8" - 5 1/2"
Alarm Temperature of motor		220degree	220degree
Alarm Temperature of gear oil		75degree	75degree
Alarm Temperature of hydraulic oil		75degree	75degree
Transmission ratio		12.8:1	10.4:1

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