Houston TX USA
VFD Drilling Rigs ● The drawworks is driven by two VFD AC motors with 1+1R/2+2R step-less speed, and reversal will be realized by AC motor reversal. ● The mud pump is driven by VFD AC motors, which are mounted on the rear skid of mud pump, with V-belt transmission and simple structure. ● The independent driven rotary table runs with 1+1R/2+2R step-less speed, and reversal will be realized by AC motor reversal. ● Using AC-DC-AC drive technology, rotary table and drawworks are four quadrant running and full digital vector control. ● Single drum, gear driven and one / two shifts smooth speed change drawworks is simple in structure and reliable in operation. ● Feed back / Dynamic brake is adopted to replace eddy current brake as auxiliary brake. ● Automatic drilling is obtained by drawworks main motor or an independent motor. Intellectual position control for traveling block prevents crown block and rotary table from collision. ● Real time communication and network is available by using PROFIBUS technology. ● K type mast is suitable for install top drive system. ● Sling shot or swing up substructure and mast are applied so that all the equipment can be installed at lower.