ZJ40/2250LDB

Driving of RT and DW is independent, 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 AC VF all-digital auto control technique, which make the performance of the rig under drilling condition get close to digital-control electric VF rig; but its cost is much lower. 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

4000m （ 114mmDP ）

10

Substructure type

Block package type

3200m （ 127mmDP ）

2

Max hook load

2250kN

11

Substructure height and clear height under RT beam

7.5m ， 6.3m

3

Wire rope system of traveling system

5×6 ， parallel

12

Mast type and effective height

K TYPE ， 43m

4

DW rated power

735kW （ 1000hp ）

13

Transmission mode

hydraulic transmission and chain paralleling ， AC-VFD-AC

5

DW gear

4 forward

4 forward+ 2 reverse

14

Quantity/power of main diesel engine

3×810kW

15

Quantity/power of auxiliary generator set

3×400kW

6

Diameter of drilling wire rope

φ 32mm

7

RT opening diameter

698.5mm （ 27 1/2″ ）

16

Quantity and power of VF motor

1×600kW+1x45 kW