AC VFD ZJ50D 3150 Electric Drilling Rig

The AC VFD Drilling Rig

Adopting advanced full numerical AC VFD technology, intellectual drilling control is accomplished through PLC, touch screen and integrated design of air, electric, hydraulic parts and drilling instrumentation. Large power and wide frequency motors are used for complete range speed setting of drawworks, rotary table and mud pumps. Single shaft, gear drive and one shift smooth speed change drawworks is simple in structure and reliable in operation. Compound hydraulic disc brake and dynamic braking are used for braking system.

Automatic drilling is obtained by drawworks main motor or an independent motor. Real time supervision and control for tripping in, tripping out and drilling operation are obtained.

Intellectual soft starting device, ET200 or ASI (airspeed indicator)module is used for protection and supervision to MCC (motor control center system). Intellectual position control for traveling block to prevent top and low collision is provided.

Protective functions to air or hydraulic loss, electric control system or motor trouble, limit for rotary torque and pump pressure is available.

A separate driller cabin is fitted. Operations for air, electric and hydraulic, drilling data and parameters are all in the cabin. Logic control, supervision and maintenance during complete drilling operations are available by PLC processes. The drilling data can be stored, printed and remote transmitted. All operations by driller can be completed in the cabin for better working conditions and less working strength.

Top drive drilling system can be equipped.
Integrated skid rail may be provided to meet requirements for cluster well drilling.

Specification of the AC VFD Drilling Rig

AC VFD Electric Drilling Rig
ZJ50D
Drilling rig model: ZJ50/3150D (1500HP)
Nominal drilling depth, m: 114mm (41/2") Drill pipe: 35000-5000 127mm(5")drill pipe: 2800-4500
Max. Hook load, KN (t): 3150(315)
Hook Speed, m/s: 0-1.258
Line strung of hoisting system: 12
Drill line diameter, mm: 35
Max. Pull of fast line, KN: 350
Drawworks:
Model: JC50dB
Power rating KW (HP): 1100(1500)
Speed: I, smooth change
Brake mode: 1. Hydraulic disc brake + Regenerating brake 2.
Crown block: TC315
Traveling block: YC315
Sheave OD of hoisting system, mm(in): 1270(50)
Hook: DG315
Swivel:
Model: SL450
Stem dia., mm: 75
Rotary table:
Table opening mm (in): 952.5(37 1/2)
Speed: I, smooth change
Drive mode: Independent electric drive

Mast:
Type: K
Height, m: 45
Max. Load, KN: 3150
Substructure:
Type: Dual lift or Swing lift
Floor Height, m: 9
Clear height: , m: 7.6
Mud pump: F-1600*2
Mud pump drive mode: Electric drive
Electric control mode: AC-DC-AC, one for one control
Total power, KW: 3*1050