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Home > Products > Offshore rig >ZJ70/4500DBS

7000m digital control VF electric rig

ZJ70/4500DBS Drilling module


Main features of drilling rig:

The rig is designed integrated with mechanical, electric, hydraulic, pneumatic and digital control. It takes fully the advantages of digital control, AC VF electric transmission. So its mechanical structure has been simplified.

Electric transmission uses a vector VF drive system; fully digitalized operation and control are realized, automatic and intelligent operation and control functions as well. The control data and drilling data can be acquired (signal) , displayed, stored, printed, controlled and managed remotely. The effective control for WOB, bit speed, pump pressure and pump displacement in large range and high precision can be easily realized, thus improving drilling technology. The VF technology used makes Max. DW output torque at zero rotation speed to ensure the suspending function of rig hoisting system, which completely replaces traditional driller's operation mode. PLC redundancy design of double circuit as spare parts each other is adopted for operation control system, improving system reliability.

Integrated driller's cabin makes the driller fulfill the main operation of drill rig in the cabin.

Cooperated with drill floor skidding system, realizing well drilling and workover operation at multi-wellhead.

Main technical parameters :

Nominal drilling depth

7000m ( 114mm DP )

6000m ( 127mm DP )

Max. hook load

4500kN

Wire rope system of traveling system

6x7 , parallel

DW rated power

1470 kW ( 2000hp )

DW gears

One gear, stepless speed regulation

Diameter of drilling line

φ 38mm

RT opening diameter

950mm ( 37-1/2″ )

RT gears

One gear, stepless speed regulation

2 gears, stepless speed regulation

Qty. /power of drilling pump

3× 1600 hp pump

Derrick type and effective height

K type , 45m

Derrick type , 46m

Transmission mode

AC-VFD-AC

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