ZJ120DB Drilling Rig
Features:
The drawworks is driven by two 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 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 prevent 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 used so that all the equipment can be installed at lower position
Specification:
Model ZJ120/9000 DB
Nominal drilling depth(5” DP) 12000m，40000ft
Max. hook load 9000kn ，2000000 lbs
Traveling system 7x8
Wire line dia. 48 mm ,1-7/8 In
Rated power of drawworks 4400 kw,6000 hp
Drawworks speed I or II, smooth change
Braking type Hyd. Disc brake + regeneration brake
Crown block type TC900
Traveling block type YC900
OD of block sheaves 1829 mm
Swlive type SL675
Rotary table opening 1250 mm,37.5 in
Mast type and height (K type) 52 m, 171 ft
Substructure type and height (Swing lift) 12 m,40ft
Clear height under rotary beam 10m,33ft
Mud pump number and power
2 x 1617 kw, 2 x 2200 hp
Max. pump pressure
52 mpa, 7500psi
Power drive mode AC-DC-AC
Control mode One to One/One to Two
