No. |
Item |
Equal normal service rig |
Hydraulic service rig |
1 |
Jack up system |
Derrick tackle block windlass |
Composite hydro cylinder power |
2 |
Drive |
Machine |
Hydraulic pressure |
3 |
Mechanical friction |
Mechanical friction |
Liquid throttle |
4 |
Energy storage |
No |
Can store energy and use |
5 |
Hydraulic clamp power |
Need alternative extension |
Need not alternative extension |
6 |
Installed power |
110kW |
52kW |
7 |
Hoisting speed in rated load |
0.3m/s |
1.0m/s |
8 |
Oil consumption |
400kg/Every time |
No |
9 |
Electric power |
A little |
About 800kwh/ every time |
10 |
Power savingeffect |
/ |
About decrease 50% |
11 |
Noise |
Yes |
No |
12 |
The probability impact crown block |
Yes |
No |
13 |
Asbestos dust |
Yes |
No |
14 |
Smoke discharge |
Yes |
No |
15 |
Unit cost |
400---2500 Thousand |
700---1300 Thousand |
16 |
Wire rope life |
About 3 month |
About 24 month |
17 |
Moving work load |
Many |
Lesser |
18 |
Fix cost |
About 2.5 thousand/ every time |
About 800 thousand/ every time |
