How can jackups be lubricated optimally and safely?
When the rig reaches the work site, the crew jacks the legs downward through the water and into the sea. This anchors the rig and holds the hull well above the waves. Because the rig is a sea-going vessel, it is subject to the same rules and regulations as ships are. The legs are what give the jackup its name.
They can be raised and lowered on ratchets in a process known as jacking up or jacking down. During jacking up, the legs go down and the rig goes up. During jacking down, the legs go up and the rig goes down until it ﬂoats on the surface of the water, then the legs continue to travel up until they tower above it.
The verticals that form the outside of the lattice are called chords. Legs can have a square cross-section with four chords, or a triangular cross-section with three chords. The legs are operated by jacking motors, which drive cogs that move notches on the jacking chords up and down. This is known as a rack and pinion system. The rack is the series of notches on the chord and the pinion is the gear whose teeth interlock with the rack. It may be clear that when lubrication on board of such platforms, this is preferably done with high-tech lubricants.
The conditions under which the racks of a lifting platform must serve require a speciﬁc grease that is more environmentally friendly, withstands extreme high loads, is highly water-resistant and offers optimum protection against wear.
In collaboration with its specialist suppliers Van Meeuwen has developed a new generation biodegradable lubricating greases for these speciﬁc applications where biodegradability plays a very important role. Other applications where these lubricants can be used very well are open gears, wire ropes, bearings, bushes, cylinder and piston units and guideways.
Features and beneﬁts of Van Meeuwen’s high performance lubricants making them extremely suitable for lubricating lifting platforms or so-called jackup systems:
- Biodegradable open gear greases for heavily loaded applications
- Where biodegradability plays a very important role
- Extremely suitable for lubricating jack-up systems
- Very high lubricating ﬁlm strengths with excellent wear and corrosion protection
- Thermally and very oxidatively stable
- Suitable for temperatures from -30° to +100°C
- HOCNF classified
- Strong polarity allowing excellent adhesion to metal surfaces
- Very resistant to water (including salt), steam and cleaning agents
- Contains no solid lubricants like graphite or MoS2
Contact our specialist!
If you have any questions regarding lubrication for jackup systems or other marine & offshore related topics. Don't hesitate to contact our specialist:
Sales Engineer Marine & Offshore
direct +31 (0)6 5234 1717