ZJ70 / 4500LDB Rig

Z.70/4500LDB rig drives the compounding box via 3 diesel engines and anti-clockwise coupling engine set. Compound chain box is 6
shafts energy-save sealing structure which includes 3 engines and 2 pumps . (1. il and iv shafts are input shats of engine drive) . lland
Vshafts are used to drive mud pumps, vI shaft is used to drive energy-saving Generator, and drive Drawworks by eight-row chain. Front
open-face mast and Swing up substructure are raised by Drawworks. The main brake of Drawworks is hydraulic disc brake, the auxiliany
brake is electromagnetic eddy current brake.

1 .Adopt swing up type of mast and substructure integral raising. Substructure, mast and all equipments are installed at low position and
raise mast and substructure at one time by Drawworks powere. dismounting convenience, Having advantages of quick moving, integral
movement and installation, etc
2. Diesel engine, hydrauic coupling and transmission box form a whole transport unit, which is instaled on driving base at rear foor. The
whole chain box is installed directly on the substructure at rear floor
3 .Rotary table speed, torque and mud pump stroke rate can respectively adjusted according to the driling process , provides the premise
and guarantee to optimize the drilling process and automatic bit feeding