What is a liftboat?

What is a liftboat?

Liftboats are the desired vessel for maximum shallow water jobs in the United States Gulf of Mexico (GOM) wherein there are about 200 such vessels. So, outside the USA-GOM, why are they honestly unknown? This article will address the general features of a liftboat, uses, and cope with the questions – why have they been unknown outside the United States-GOM.

A liftboat is a self-propelled jack up vessel, multi-reason, self-raising vessel. Some have cited liftboats as jack-up barges, lift barges, jack-boats. We will have a look at the distinguishing functions of a liftboat as compared to its closest cousin, the jack-up drilling rig. Since a liftboat spends most of its operating life out of the water, it is felt it higher to cope with what it does at some point of its operating existence. Further, we could observe how it receives to the process web page.

The average liftboat design optimizes the interrelationship of the important thing functions, i.E., one could now not the choice a big deck area without a similar deck load, and so forth. Looking on the liftboat, there are certain key elements to attention on (1) Legs and pads, (2) Jacking System, (three) Working Water Depth, (4) Open Deck Area, (5) Net Deck Load, (6) Crane Capacity, (7) Personnel Accommodations, (8) Propulsion and (9) Classification Consideration


Proven to be a fee powerful layout, the enormously wide variety of liftboats have 3 columnar legs (pipe legs). Columnar legs and pads provide added buoyancy for the liftboat because the legs are diminished to the sea ground. This buoyancy in each the legs and pads (spud cans) facilitates to reduce the bottom bearing stress at the pads. In mixture with the buoyancy, larger liftboat pads are designed to lessen backside bearing stress. This has the effect of less penetration for the typical liftboat.

Working water depth also influences the form of a leg. After approximately 220 toes (67 meters) of water, then lattice legs are the norm.

The tremendous majority of liftboats are three-legged. The four-legged liftboat will price extra than the cost of simply adding the cost of any other leg, i.e., the jacking machine to support legs loaded diagonally is extra and the hull structure is exclusive/heavier. But operationally, the setup time savings of a four-legged equates to cash, so, one has to weigh the prices and blessings of three vs. 4 legs. Four-legged is quicker. Just take into account that records have proven that ninety-five %+ of the existing liftboat fleet is 3 legs!

Jacking System

The jacking gadget for a liftboat may be very unique than the jacking system for a jack-up drilling rig. The principal variations centred on velocity and cycles.

The speed of the liftboat jacking device is vital. While a regular jack-up drilling rig elevates at two feet consistent with a minute a liftboat should increase at four to 6 feet in keeping with a minute and decrease the legs at 14-18 toes in line with the minute. This gives the liftboat the capability to get on and stale area significantly faster.

The jacking gadget for a liftboat encounters a totally exclusive operational cycle. It could no longer be unusual for a liftboat to jack up and down in twelve months the identical quantity of instances that a jack-up drilling rig could encounter in its entire lifetime. So, the wear factors, redundancy, cloth grades and surprise hundreds are distinct among jack-America and liftboats.

The jacking device for a liftboat encounters a very one-of-a-kind operational cycle. It would now not be unusual for a liftboat to jack up and down in 365 days the same variety of times that a jack-up drilling rig would come upon in its whole lifetime. So, the wear and tear factors, redundancy, cloth grades and surprise hundreds are one of a kind between jack-USA and liftboats. To book liftboat for windfarm, click here

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