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
Following the successful modification of the jack-up drilling rig Britannia from a slot-type drilling unit to a cantilevered unit, completed recently within the contractual time, the Rotterdam Shipyard has contracted another rig modification job. The Houston-based rigowners Reading and Bates
onshore, including the turbine, and then towed to the installation site where, after ballasting the GBS to the seabed, con- ventional heavy-lift strand jacks which are reused to lift one tower level after the other, lifting two sections weighing a total 960-tonne into their ? nal positions. The recoverable
OFFSHORE WIND THE INSTALLATION FLEET 110MW Changhua wind farm in 2020. Both wind farms are currently under construction.” Esteyo’s ELICAN Seajacks concept. UK-based Seajacks has been operating in the off- Source: ALE shore wind business since 2006. Since then, it’s built the Kraken, Leviathan, Hydra
. stalled to create the same size farm. But, that might end up as high as 270 meters and China is starting to develop,” he These vessels mostly have to jack-up to it could also mean added complexity, above the sea level.” says. “Taiwan is working on its ? rst full perform installation operations. “Sub-
has become a key ‘Year of Acceleration’ for offshore rig Financiers also note the overhang of commodations with its lenders. Its daily region for jack-ups again.” utilization and dayrates. The marketed older oil service vessels in the market- business will continue while discussions Privately held
gas prices.” In spite of these efforts, in the U.S. Gulf of Mexico hovers just shares trading at multi-year lows. sultants see continued scrappage of jack- and in the face of demand slowdowns, under $40/ barrel (basis a 2018 study Consultants McKinsey & Company, in ups, against the backdrop of annual
submarine commissioned on April 11, 1942. On her way through the Caribbean to her ? rst posting in Pearl Harbor she rescued 16 survivors from USAT Jack, which had been torpedoed by a U-boat. Her ? rst war patrol was, unfortunately, also her last. Sent to the Aleutian Islands in June 1942, she operated
? cer of E.N. Bisso were pres- The boat is named after Cornelius Dee Length 80 ft. Main Generators: John Deere ent. christened the C.D. While as the “Jack” White, Jr. Jack White was an Breadth 38 ft. Fire? ghting: Counter? re ES-125-400 vessel’s sponsor, and Father Kevin owner of E.N. Bisso and was
railroad were from container vessels), has seen way, included the possibility of a Fourth Whampoa, through its Panama Ports (NYSE- “KSU”) along with Mi-Jack, a economics and change with the times. In Set of Locks in designing the Third Set of Company (both sides) and SSA Marine leading producer of rubber
one and a half and two years. Offshore wind requires multiple specialized vessels. Each project is dif- ferent, but De Prez said that, general- ly, a jack-up barge would be towed to the work site. Some jack-ups are out- ? tted with propulsion systems, allow- ing autonomous movement within the offshore
concurrent U.S. offshore wind construction projects. likely be at a place where those issues have been worked Jurgen de Prez is Commercial Director of Jack-Up Barge out.” Huggins Jones said discussions are underway now (J-UB), a Netherlands based company that provides self-el- at various corporate levels
, and as a direct result, a lot more people know exactly where Palatka, Florida is located. By Rick Eyerdam n the St Johns River, just 60 miles south of Jack- GIANT TUGS AND FERRIES AMONG THE PINES sonville, lies the sleepy town of Palatka, Florida. Nestled amid the pines and along the banks of the river
agencies, police and military units worldwide. ton 5 magnetometer (5th generation), numerous underwa- JW Fishers was founded in the mid-60s by Jack Fisher. ter video systems, two ROVs, side scan sonar, sector scan Mr. Fisher, an avid diver, needed an underwater metal detec- sonar, acoustic pingers
, 47 Shell Oil ....................................................................... 12 Bureau of Ocean Energy Management ...................... 38, 41 Jack-Up Barge (J-UB) ..................................................... 42 Shipbuilders Council of America ..................................... 41 Burns
Protection (MA DEP) to overturn the Edgartown decision.” Separately, Icebreaker Wind of? cials (Lake Erie) are also turbine capacity require jack-ups with longer legs and larger thinking about the Jones Act. Dave Karpinksi is Icebreaker’s VP cranes. “In this emerging market segment,” de Prez
in this sandbox. ZPMC has four pro- ZPMC impressively owns and oper- in three to four months (after engineer- accommodate the large post-Panamax prietary jacking systems available for ates 25 heavylift ships ranging in ca- ing), and at about one-third the price of tonnage, but this involves (to date) an
be assembled roller units that were included. In addition, the unit featuring seven Lifting and Handling (Code 700) comes with four powered hydraulic toe jacks used personnel, two Code 900F.12 maintenance mechan- to lift the IPEs and place them on the main crawler ics and a Code 983 engineer. A lengthy process
, sold separately, to complete the system. its Orange, Texas shipyard, Conrad delivered the CLEAN The C-Hero system provides a proven three-minute MOB JACKSONVILLE, the ? rst LNG Bunker Barge built in recovery while underway. The C-Hero Rescue Davit, fruit of North America, in August of 2018. The CLEAN
owners, about as much as 2,000 cars per year. Its six engines can run as three, and its three battery packs are sim- ilar to the Fred Olsen wind-carrier jack- up vessel. “An electrical bus switch for their vessel cut the cost of operations and Business news of fuel by 50 percent and allows its three you
with roots in oil, like Equinor, have been the company in 2018, that was part of the grid (as possible). In marine, the goal er’s 15,000 GT Brave Tern jack-up wind known to insist on greener power from allure of Wartsila’s power drives divi- is to slash operating costs and fuel con- installation vessels
are in the ‘raising cycle’ right now. Most terminals have at least a few new cranes large enough to attract the Can dock handle the weight of Can it be jacked up How high do we go? newly raised crane? off the dock? larger ships. Now they are raising their older cranes to increase ca- pacity.” And, it goes
ships gines can run as three, and its three battery packs are similar to should be easy to convert to new fuel,” said Parpala. the Fred Olsen wind-carrier jack-up vessel. “An electrical bus switch for their vessel cut the cost of operations and of fuel China offering by 50 percent and allows its three different
scale In the ? rst encounter with large offshore turbines off the U.S. Eastern Seaboard, the site of Fred Olsen Wind Carrier’s 15,000 GT Brave Tern jack-up wind installation vessels wind installation vessel easily handling and installing turbines was a sobering sight for those who had seen the very
launched the gent’, or sophisticated, system to improve the performance of Signature VM system here already, we should grasp this op- the USV,” said Jack Hu, Technical Manager at Nortek China. Clockwise, starting left: Nortek China USV used by China University of Geosciences for measuring the current
for marine imaging for subsurface applications Accomplishments ? World’s ? rst application of real-time machine guidance for on-water cranes/excavators/ jack hammers, with sonar veri? cation: The system combines Trimble Marine’s position- ing, machine guidance and real-time visual- ization capabilities