An offshore jacking system built by National Supply Company, Houston, will give "legs" to a cargo handling barge designed for shipping major marine components between New England shipyards.
The jacking system will enable General Dynamics' Electric Boat Division to load and unload components at dock level, then raise the legs and tow the barge between its shipyards in Groton and 50 miles up the coast at Q u o n - set Point, R.I.
Also described as a "cargo elevating platform," the barge will be 195-feet long and 78- feet wide with a capacity of about 1,200 tons.
The barge is expected to make about 25 trips a year between the two shipyards with components weighing up to 600 tons.
National's jacking system was developed for the offshore oil industry. Drilling or production platforms fitted with the jacking system could be towed to an offshore oil field. Then the legs would be jacked into place to create a stable platform in varying water depths. The legs could then be easily retracted whenever the platforms needed to be towed to a new location.
Bruce Dawson, sales engineer for National's Drilling Equipment Division, Houston, said the rack-and-pinion jacking system consists of three independent jacking units and legs. Each cylindrical leg, fitted with a sawtooth rack, is 72 feet in length, with an outside diameter of six feet.
"The system is electrically controlled and can be powered from shore-supplied power sources," added Mr. Dawson. "The electrical system provides smooth and continuous movement for the precise adjustment of the platform to the docks in a minimum amount of time." The barge loading and jacking system idea grew out of a brainstorming session at Gen- eral Dynamics. Cranes used in recent years had been limited to 300 tons and the Electric Boat Division sometimes wanted to transport far larger components.
The jacking units were manufactured at National Supply Company's plant in Torrance, Calif., and the legs and racks were made in Houston. The equipment was then shipped to Quincy, Mass., where the barge is being constructed by General Dynamics' Quincy Shipbuilding Division.
National said the barge jacking system should find an easier service life than those used on many offshore installations.
"We're really looking at an ideal situation here because loading and unloading will be done in protected areas on concrete pylons and under good weather conditions," he said. By comparison, some offshore jacking system legs used on drilling rigs are longer than a football field and are expected to withstand severe pounding from ocean waves and high winds.
Mr. Dawson said jacking systems can be used for other non-oilfield purposes—such as portable drydocks, bridge erection and pile driving.
For free literature on National Supply's offshore jacking system, Write 9 4 on Reader Service Card
ice-classified drilling vessel and is designed for oil exploration in the Arctic. Hydranautics designed the 8,500-ton transfer system that includes jacking beam, pile cap, roller cage assembly and roller beams, and floating dock beams. Equipment provided by Hydranautics includes eight 110- ton gripper
. pads (12.1 x 4.8-m), much larger than those on other liftboats, to provide for greater bottom stability and greater deck loads. The L/B Myrtle can also jack with a full pre-load and its pre-load system has quick acting stainless steel dump valves. It is equipped with three Nautilus cranes with 150, 50
Literature is now available describing- a "fixed-mounted" version of its unique opposed-pinion jacking system for offshore platforms manufactured by National Supply Company. Attached by welding directly to the hull, the fixed version allows the National jacking system to be used on a greater
Brae gas condensate field in the North Sea. Each system consists of two 420- metric-ton and two 210-metric-ton, push-pull capacity hydraulic gripper jack assemblies and a control console. The 420-metric-ton gripper jacks are the largest gripper jacks ever bought for rig skidding. Hydranautics also
, for the rig skidding system on the Shell Eider platform in the North Sea. The system will consist of a control console and four hydraulic gripper jacks. The control console will have the capability of skidding the skidbase in an east/west direction or the substructure in a north/south direction
, for the rig-skidding system on the Shell Tern platform in the North Sea. The system will consist of a control console and four hydraulic gripper jacks. The console will have the capability of skidding the skidbase in an east-west direction or the derrick module in a north-south direction. It will
other shipyards. These two new orders will expand the orderbook at the Pandan Road yard, which previously consisted of five supply vessels, four jackup-type drilling rigs, and one jackup-type service barge. The first contract was signed with a French company, Total Indonesia, for construction
nation whose lack of infrastructure would make it 40 to 60 percent more expensive to build the industrial plant locally. Such concepts frequently use jackup arrangements, but their large size and heavier weight differ from past offshore drilling unit applications of jackup systems. The jackup leg components
Bethlehem to serve better the specific requirements of Phillips in the Texas offshore water. The self-setting production-storage unit is a mat-supported jackup unit similar in configuration to the Bethlehem mat-supported jackup drilling unit. The production equipment, heliport, and quarters will be installed i
NKK (Nippon Kokan) has concluded a license agreement for a jackup-type drilling rig made by Baker Marine Corp. (BMC), a leading U.S. rig builder. Masayoshi Akizawa, NKK New York general manager, said under the terms of the contract, NKK will manufacture and market the BMC jackup-type rigs on an
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the operators will be required to set up a in Indonesian waters between 2007 and tems and unskilled crew as some of the Bosporus, New York Harbor, and Jack- safety management system, a training 2018. Of 32 investigations carried out 17 contributing factors to fatal ? res. Aleik’s sonville, Florida.
breathing into an agreement with Port Tampa Bay, and will cease working room after managing the most dif?cult aspects of the expansion. with the Port of Jacksonville in May. CMA CGM was responsible for almost 12 percent of Jaxport’s Asian container volume last year Port of Jacksonville and for about 1.3
and being carried in the hook all the way back to shore. “This was an industry ? rst,” detyens.com says Krachtoudi. firstname.lastname@example.org Cutting of the jacket was done by from a subsea construction vessel while the Charleston, South Carolina heavy lift vessel was on site and had the jacket in the crane
; Callaway South Industrial Park in La- U.S.-based ports, shippers and ocean liners are all beginning Grange, Georgia; Cecil Commerce Center Mega Site in Jack- to come on board. When they do, of course, they’ll need to sonville, Florida; Eastwood Commerce Center, in Lemoyne, frst “take the train.” A photo
aviator to 27-years on active duty. Most recently subsidiary of Foss Maritime Compa- be promoted to the fag rank in the he served in command of Sector Jack- ny, announced that Foss project man- sonville where he exercised Captain of ager Amber Thomas has been selected U.S. Navy. During her distinguished
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users, and the pilotage associations.” “Canada’s pilotage system has not been overhauled in more Secondly, pushback is emerging among states. In October, Jack- than 40 years and is ineffcient, infexible, out-of-date and des- sonville-based Crowley Holdings Inc., the holding company for perately needs to be
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Industries Announces Delivery of North America’s First LNG Bunker Barge Conrad Industries announced the successful completion and delivery of the Clean Jacksonville, the ? rst LNG bun- ker barge built in North America. The Clean Jacksonville was constructed in Orange, TX, at Conrad Orange Ship- yard, a
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in mechanical engineer- ing from the University of Dayton. Jensen Appointed to Port NO- LA’s Board of Commissioners Gov. John Bel Edwards has appointed Jack C. Jensen Jr. to the Board of Com- missioners of the Port of New Orleans. Jensen will serve a ? ve-year term. In 1983, Jensen founded Transportation
Mariner, The words of General Darren McDew State Senator, College President The Great Lakes Group Adds rang true to Massachusetts Maritime John (“Jack”) F. Aylmer died peace- to Management Team Academy’s nearly 400 graduates on fully at home on July 8th 2018. He The Great Lakes Group has added a
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and TOTE Navy career and his tenure as U.S. Services. Nolan currently serves as the Maritime Administrator. President of TOTE Maritime Puerto John “Jack” J. Gallagher Helis Accepts Position at Rico, has been with the TOTE fam- Marad Headquarters ily of companies since 2013. He will A maritime industry
of federal law to: onstration windfarm, combined the use of a foreign-? agged “[T]he subsoil and seabed of the outer continental shelf and heavy-lift jack-up vessel, assisted by purpose-built lift-boats. to all art
Glas Unda Morganti Boer and investor Maas Capital. The three - in charge also of supplying the main carriers that excel in environmental Obituary: John “Jack” J. Gallagher John “Jack” J. Gallagher, a maritime in- partners hold an equal share in the new equipment - will measure 77.3 x 17 m, stewardship and