1. Direct acting hoisting system
Harald Langenes, NFLB 12 juni 2015

2. 29 Complete Drilling Packages 2007 - 2014
ZPMC
PPL x 9 pakker
SWS x 6 pakker
QWHI
YZJ
Worley Parson
OSX x 2 pakker
DSIC x 4 pakker
Jurong x 2 pakker
Petro Vietnam
Keppel FELS
Lybster

3. Selection of Product Deliveries
37 Drawworks
37 Top Drives
70 JiM 10 (Roughnecks)
39 Catwalk machines
23 Smart Rackers (Pipehandling machines)
24 Sack Dosing Units
45 Drilling Control Rooms

4. Why do we have to do something different?
Hoisting Systems
Why do we have to do something different?

5. Drilling History Offshore drilling started in the early 60’?
Each new generation rigs conquered deeper waters
Bluewater 1 – 1962 (

6. Drilling History Hoisting Capacity
Increased from below 500 shT to 1250 shT
Next step will be 1500 – 2000 shT
Drillstring Compensation
Increased from below 500 to 1500 kips
Next step probably 2000 – 2500 kips

7. What has been done to meet the requirement?
Hoisting System
Increased from 8 to 16 falls
Added power
Drillstring Compensation
Stronger steel structures
Larger cylinders

8. What are the consequences?
Hoisting System
Increased friction due to number of sheaves. 16 fall system has 15 – 18% loss
Increased inertia in the system
Increased drill line (2 1/8” ++)
Reduced hoisting speed
Drillstring Compensation
Increased weight on Top Mounted Compensator affects the overall VCG

9. Direct Acting Hoisting System
Multiple wires on single layer winch drum
Wires routed via sheaves in derrick top directly to the Top Drive

10. Direct Acting Hoisting System
Increased safety using multiple wires
No Cut & Slip
Reach 20% higher speed in half the time with the same power input
At low weights, the energy consumption is 60 – 70% of a drawwork system with same capacity
Drillstring Compensator equipment accessible using rig crane
Lower VCG

11. Direct Acting Hoisting System
Higher level of safety
Increased operational time
More efficient
Increased VDL
The improved efficiency can be used to either increasing the operational speed or reduce the required power input