ZJ70/4500LDB

On the basis of common mechanical rig, driving of RT and DW is separated, and RT is driven by an independent AC VF motor. RT rev, torque and mud pump stroke can be adjusted separately as per drilling technology, which provides precondition and guarantee for drilling technology optimization and auto-bit-feeding realization.
RT and auto-bit-feeding both adopt all-digital auto control technique, which make the performance of the rig under drilling condition get close to digital-control electric VF rig; driller operates the touch screen to fulfill drilling operation through optimized drilling parameters, which will reduce labor intensity significantly and improve work efficiency. Display, restoration, regulation and control, remote management of major drilling parameters can be realized.

Main technical parameters

1

Nominal drilling depth

7000m （ 114mmDP ）

9

Quantity and power of drilling pump

6000m （ 127mmDP ）

10

Substructure type

2

Max hook load

4500kN

11

Substructure height and clear height under RT beam

3

Wire rope system of traveling system

6 × 7 ， parallel

12

Mast type and effective height

4

DW rated power

1470 kW （ 2000hp ）

13

Transmission mode

5

DW gear

4 gears

6 gears

14

Quantity/power of main diesel engine

4 forward+ 2 reverse

6 forward+ 2 reverse

15

Quantity/power of auxiliary generator set

6

Diameter of drilling wire rope

φ 38mm

16

Quantity and power of VF motor

7

RT opening diameter

950mm （ 37 1/2″ ）

17

HP mud manifold