A liftboat is a self-propelled, multi-purpose, self-elevating vessel. Some have mentioned liftboats as self elevating jack up, lift- up barges, jack-boats. We are going to examine the distinctive features of a liftboat as compared to its nearest full cousin, the jack-up drill rig. Since a liftboat spends most of its operating life out of the water; it is felt, it higher to deal with what it does throughout its working life. Further, let’s look into how it gets to the work site.
The overall liftboat design optimizes the relation of the key features, i.e., one would not need a big deck space without a comparable deck load, etc. looking at the liftboat, there are assured key components to concentrate on.
The overwhelming majority of liftboats are 3-legged. The 4-legged liftboat will price more than the price of merely adding the price of another leg, i.e., the jacking system to support 2 legs loaded diagonally is bigger and therefore the hull structure is different/heavier. However operationally, the setup time savings of a four-legged equates to cash, so, one needs to weigh the prices and advantages of 3 vs. four legs. Four-legged is quicker. Simply keep in mind that history has shown that 95% of the prevailing liftboat fleet is 3 legs!
The jacking system for a liftboat is extremely different than the jacking system for a jack-up drill rig. The Speed of the liftboat jacking system is important. Whereas a typical jack-up drill rig elevates at 2 feet per minute a liftboat might elevate at four to 6 feet per minute and lower the legs at 14-18 feet per minute. This provides the liftboat with the ability to induce on and off location considerably faster.
The jacking system for a liftboat encounters a completely different operating cycle. It might not be uncommon for a liftboat to jack up and down in a 1-year constant number of times that a jack-up drill rig would encounter in its entire lifespan.
The expected wind, wave, and surroundings within the most working water depth must be determined. An area with modest environmental conditions vs. harsh environmental conditions will be a significantly completely different liftboat design in every aspect, i.e., legs, jacking system and hull. As a general rule, as operating water depths and severity of environmental conditions increase, then, prices of the vessel also rise exponentially.
The deck space is that the unobstructed, open area. The liftboat crane is employed to move equipment and materials around and onto and off the platform/offshore location. There is a relationship between these variables – open deck space, net deck load and crane capability. Further, you need a crane capability that is coextensive with the expected deck loads and space.
The net deck load for a liftboat is what you have got on your deck in transit and can then jack up with on the deck. Consumables (like water, fuel, hydraulic fluid, etc.) are added to the net deck load. Liftboat operators are involved with what they can carry and elevate. There is a certain relationship among deck space, deck load, and crane capability. Liftboat Singapore is designed as multi-purpose vessels.
There are a variety of cranes for liftboats. However, there is one caveat – cranes for liftboats are designed by crane makers specifically for liftboats. Weight could be a key thought in liftboat design, so, each thought has to be created within the overall design as well as the crane. Therefore, cranes for liftboats are usually structurally lighter than a comparable offshore crane. To read more about offshore maintenance services visit.