SUBSEA LIFTING | APPLICATION REPORT
SHIP-SHAPE CLOSE SHAVE
Ingersoll Rand has developed a custom air winch for a start-up company’s new device for cleaning ships’ hulls. “The company is called ShipShave. They are based in Norway and they have come up with a solution for cleaning the hulls of larger vessels, oil tankers and the like, while the vessel is in motion,” says Ingersoll Rand’s Gus Caldera. “The goal is fuel and emissions savings. Fouled hulls create drag. A lot of the hull surface is travelling through the water; when you clean that surface the ship can move Until now cleaning has had to be done while the ship is in port. ShipShave’s device works while the vessel is underway, saving turn-around time and money. Essentially, it is a rod which carries brushes along its length and has vanes at each end; a rope connects it to Ingersoll Rand’s winch at the bows. When the device is lowered over the side of the ship the pressure of the moving water pushes it against the hull, causing the brushes to rub again the hull and clean it. The design of the vanes move it vertically up and down, and the winch pulls it forward
off-shore renewable source, wave-power, although not yet as developed as wind- farms, will certainly come.” Ingersoll Rand is noticing increased demand for cold-weather equipment in the offshore market. “We are seeing an
R The Shipshave device being prepared for lowering
at each cycle, so that the entire submerged side of the ship is scraped clean. “The winch needs very strong capacity to
pull against the force of the water; and it needs to operate at a critically low speed,” says Caldera. “Many of the ships using it will be tankers, carrying explosive liquids, so safety was
extremely high rate of inquiries for very low temperature applications,” says their North American commercial leader Mark Koski. “We have seen demand from Arctic regions, Northern Russia, Canada and Alaska; we have supplied equipment to
another design consideration. We have provided a prototype already. The device is in its infancy stage now, but they are already investing in putting more units out into the neat application that saves money and that saves emissions, and we are very happy to collaborate on it.”
operate down to minus 45 degrees. Safety factors of course have to stay the same no matter what the environment; our hoists have 100% duty ratings, so they can operate continuously, as long as hydraulic power is there.” An example is their Liftchain Blowout
preventer (BOP) handling system. It can be supplied, air-powered in 25-75t capacities and in 25-200t capacities with hydraulic power. The articulated trolley on the Ingersoll Rand Hercu-Link BOP Handling System allows up to 20 degrees of side- pulling operation. “People are coming to us when they
Q Ingersoll Rand’s 125t Liftchain
Blowout Preventer Handling System.
can’t work out how to build and design these specialist systems for extreme environmental duty cycle applications,” says Koski, “and that is where we are seeing a major uptick. “Another trend that we are seeing is electric or hydraulic power replacing air – and that is throughout the offshore and subsea areas, and on-shore, in mining for example, as well. It used to be that no-one wanted electricity in wet or damp conditions or close to hazardous locations, but technology has advanced so much that now they want to do away with compressed air. The reasons are many. Emissions control is one: electric is
24 | April 2021 |
www.hoistmagazine.com
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