New Skimming Technology In Use In The Gulf
US Coast GuardJust weeks after the first Heavy Oil Recovery Device (HORD) was successfully tested in the Gulf of Mexico off the shores of Alabama, the innovative devices are greatly improving the efficiency and effectiveness of the cleanup operation. The HORD, originally dubbed Tarball Retrieval Device, is being manufactured at the rate of 8-10 units per day in shipyards in Pensacola, Fla., and Bayou La Batre, Ala. Up to 1,000 units are expected to be manufactured and put into service in the coming weeks.
The HORD has proven to be especially effective in collecting the thick, heavy oil that hampers traditional skimming methods. It is also able to cleanup the extremely light and difficult to remove sheen left on the water surface after skimming.
The brainchild of Capt. Gerry Matherne, the HORD exemplifies the adage "necessity is the mother of invention." Matherne, a supertanker captain and second generation seaman, who is under contract with BP, realized early on that something different was needed to quickly and effectively deal with the sticky, orange globs of oil (known as tarballs) floating just under the water's surface.
"Standard skimming methods work best on fresh oil on the water's surface. A lot of the oil we're dealing with on the Gulf has degraded, changing from a liquid state to a peanut butter-like consistency that floats on the surface and 12 to 18 inches below the surface," said Matherne. "The HORD reflects creative thinking, a willingness to try new things and a can-do attitude by everyone involved with the clean-up."
Matherne's invention is essentially a single unit that acts as a filter, containment and disposal system rolled into one. A mesh bag held open by a 3-foot by 3-foot aluminum frame is dragged through the water by shrimp boats put into service as skimmers. The cage-like device scoops up surface oil and sheen, as well as the thick oil lurking beneath the surface of the water.
When the bags reach their two-ton capacity, they are switched out for empty ones, loaded onto smaller boats and transported to approved oil disposal units. The bags are later decontaminated and reused.
The total downtime for skimmers outfitted with HORDs is measured in minutes, compared to hours or days for a traditional skimmer that has to transport the captured oil to disposal units and wait to be unloaded, before returning to sea.
In addition to saving precious time, the HORD's simple design greatly improves a boat's maneuverability and ability to safely perform at faster speeds and in higher seas.
For more information about the Heavy Oil Recovery Device, please contact the Mobile Joint Information Center at (251) 445-8965.