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AC or DC drilling rig, we recommend AC one?

How to do the AC or DC drilling rig type selection? We Time Rolling can provide both, but which is more suitable for you?

Time Rolling compared the DC(DC-SCR-DC) drive rigs and AC converter drive rigs comprehensively, AC (AC-VFD-AC)converter drive rigs are recommended due to the following advantage of AC Converter drive rigs.

1, AC Converter drive rigs have the advantage of low speed start and maintenance, it has good performance in low speed running and operation. 

2, It can effectively limit torque and rotation speed. Strong overload protection could avoid the drill pipes and other main parts broken unexpectedly.
3 Higher efficiency than DC SCR drive rigs. 
4 High stability, none carbon brush and commutator, lower motor maintenance cost than DC SCR drive rigs. 
5 It has brake assist function, no need for magnetic electric eddy brake, simplify the drawworks structure with lower weight. 
6 Main motor automatic bit feed. 
7 Simplify the variable frequency speed regulation system of Drawworks and Rotary Table with stepless speed regulation. 

AC Drive Rig may be a little bit more expensive than DC, but its advantage with good performance and lower operation cost should be a good choice for buyers. 

If you have any different ideas or want to choose/purchase rigs, please feel free to contact us sales@timerolling.com or select from http://www.timerolling.com/product/oil-gas-drilling/drilling-rigs/

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