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Topic: Semisubmersible

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	NaturalGas.org (Site not responding. Last check: 2007-10-21)
		Semisubmersible rigs are the most common type of offshore drilling rigs, combining the advantages of submersible rigs with the ability to drill in deep water.
		Semisubmersible rigs work on the same principle as submersible rigs; through the 'inflating' and 'deflating' of its lower hull.
		The main difference with a semisubmersible rig, however, is that when the air is let out of the lower hull, the rig does not submerge to the sea floor.
	www.naturalgas.org /naturalgas/extraction_offshore.asp (2371 words)

	OIL CAREER Employment Resource Center
		The MARINE 700 is a fourth generation semisubmersible drilling unit of the Bingo 8000 design.
		The semisubmersible is designed for a maximum wave height of 32m (105ft) and a wave period of 11 to 15sec.
		The semisubmersible has a transit draught of 9.75 m (32ft), an operating draught of 23.75m (77.9ft) and a survival draught of 21m (68.9ft).
	www.oilcareer.com /1hoover-diana.htm (645 words)

	Alexander's Gas & Oil Connections - Semisubmersible dayrates rise dramatically
		The vessel was built in 1982 at the Mitsui shipyard in Japan as a 600-bed "floatel." Formerly named the Polycastle, it worked in the Norwegian sector of the North Sea before Global Marine bought it last year.
		It entered the Brownsville shipyard Dec. 27, 1996, for conversion to a semisubmersible rig capable of drilling a 25,000-foot well in as much as 5,000 feet of water.
		The hull was modified to provide a variable deck load of at least 4,500 tons, with the addition of a moonpool, raised decks, racks for drill pipe and risers, and two 80-ton cranes.
	www.gasandoil.com /goc/features/fex80979.htm (1089 words)

	First & Second Generation Semisubmersible Drilling Rigs
		A semisubmersible obtains its buoyancy from ballasted, watertight, pontoons located below the ocean surface and wave action.
		In 1961, Shell Oil successfully converted an existing submersible rig into the first semisubmersible drilling unit for operation in the Gulf of Mexico.
		First generation semis are generally limited to water depths of less than 600 feet, and second generation are usually intended for water depths up to 1000 feet.
	www.oceanstaroec.com /fame/2000/semisubmersible.htm (249 words)

	Offshore Technology - Exxon oil and gas field projects - Hoover Diana - Gulf of Mexico
		It is classed by DNV as a column-stabilised drilling unit and is Panamanian flagged.
		The semisubmersible rig is designed for a maximum wave height of 32m (105ft) and a wave period of 11 to 15sec.
		The semisubmersible has a transit draught of 9.75m (32ft), an operating draught of 23.75m (77.9ft) and a survival draught of 21m (68.9ft).
	www.offshore-technology.com /projects/hoover (732 words)

	Offshore Technology - Petrobras Oil Rig and Gas Field Project - Roncador - Campos Basin
		The platform then commenced to sink, despite 4,100t of nitrogen being pumped into the flooded compartments at a rate of 200l/hour, in an attempt to discharge about 15% of the estimated 7 million litres of seawater.
		In the first phase of the project, a semisubmersible with a processing capacity of 180,000 barrels per day, was installed at a 1,360m water depth.
		The semisubmersible had a processing capacity of 180,000bpd, a compression capacity of 4.8 million m³/d and a water injection capacity of 24,000m³/day.
	www.offshore-technology.com /projects/roncador/index.html (1005 words)

	RIGZONE - ENSCO to Build New Ultra-Deepwater Semisubmersible Rig
		The drilling contract with Nexen Petroleum U.S.A. Inc., a subsidiary of Nexen Inc. is for a firm three and a half year primary term, with four one-year extension options at mutually agreed day rates.
		The total project cost of ENSCO 8501 is currently expected to be approximately $338 million, with mobilization to the Gulf of Mexico anticipated by the second quarter of 2009.
		ENSCO 8501 is the Company's second semisubmersible rig in the 8500 Series, and the Company's third deepwater semisubmersible rig, joining ENSCO 7500, delivered in 2000, and ENSCO 8500, which is expected to be delivered in the second quarter of 2008.
	www.rigzone.com /news/article.asp?a_id=28680 (490 words)

	Oran W. Nicks Low Speed Wind Tunnel -- Offshore Structure Testing (Site not responding. Last check: 2007-10-21)
		The wind tunnel is currently equipped to test for both wind and underwater loads for two different types of offshore structures: semisubmersibles and jack-up drilling rigs.
		Testing for semisubmersible consists of two separate parts: wind and underwater load testing.
		The mounting set-up uses a separate sub-floor to reduce the floor boundary layer thickness.
	wind.tamu.edu /Offshore.htm (744 words)

	Atlantia \| Semisubmersible FPU for Ultra-Deepwater
		Atlantia’s new SCR-friendly semisubmersible FPU is the first ultra-deepwater structure designed specifically to produce acceptable stresses in large-diameter steel catenary risers.
		The design effort began with an exhaustive analysis of SCR motions and stresses, defining critical areas that are adversely affected by extreme motions.
		The deep-draft design was verified by thorough global analysis and model-testing performed in late 2003, and detailed engineering of the first 37,000-ton-displacement FPU hull for 8,000-ft-deep water has been completed.
	www.atlantia.com /semisub (247 words)

	Diamond Offshore Announces Drilling Contract for Semisubmersible Ocean Baroness 3/5/03
		The estimated term of the drilling program is 400 days and is expected to generate revenues of approximately $44 million.
		The Ocean Baroness is a fifth-generation semisubmersible drilling rig, and one of the company's signature Victory-class upgrades, designed for self-contained mooring operations in up to 7,000 feet of water.
		The company's fleet of 46 offshore drilling rigs currently consists of 31 semisubmersibles, 14 jack-ups and one drillship.
	www.unocal.com /uclnews/2003news/030503.htm (274 words)

	OilOnline - The Original Online Source for the Oil Industry
		TODCO announced that its jackup rig, THE 256, incurred damage during a fire on board the rig in a Galveston, Texas...
		Transocean Inc. has reported that damage assessments of the moored semisubmersible rigs Transocean Marianas and Deepwater Nautilus are substantially complete...
		GlobalSantaFe Corporation has delayed the startup of its two new semisubmersible rigs in the U.S. Gulf of Mexico after an inspection revealed defects in the rigs' thruster nozzles...
	www.oilonline.com /news/headlines/rig_market (6382 words)

	maxwave
		As a first example a semisubmersible of type GVA4000 was build in model scale 1:81 and tested in the wave tank.
		Furthermore the behavior of this semisubmersible was numerically simulated using a panel method program based on potential theory.
		A key parameter for the seaworthyness of an offshore platform is the airgap left in extreme wave conditions (distance between wave crest and underside main deck).
	ism.fb12.tu-berlin.de /MT/Forschung/maxwave.html (661 words)

	Pride International, Inc. :: Pride International Announces Brazilian Deepwater Semisubmersible Startup
		HOUSTON, Nov. 1 /PRNewswire-FirstCall/ -- Pride International, Inc. announced today that the Amethyst-class deepwater semisubmersible Pride Portland, a newly constructed 5,700 foot water depth, dynamically- positioned semisubmersible, was accepted for commencement of operations on October 31 offshore Brazil.
		The rig is operated by the Company and owned by a joint venture of which Pride owns 30%.
		The Company provides onshore and offshore drilling and related services in more than 30 countries, operating a diverse fleet of 284 rigs, including two ultra-deepwater drillships, 12 semisubmersible rigs, 29 jackup rigs, 19 tender-assisted, barge and platform rigs, and 223 land rigs.
	sev.prnewswire.com /oil-energy/20051101/DATU08702112005-1.html (310 words)

	Pride International, Inc. :: Pride International Agrees to Contract Deepwater Semisubmersible
		HOUSTON, March 24 /PRNewswire-FirstCall/ -- Pride International, Inc. announced that it has agreed to terms to operate its deepwater semisubmersible Pride North America in the Mediterranean Sea for a 730 day contract with expected aggregate revenues of approximately $151 million.
		The Company expects to commence operations under the new terms after the current contract commitment for the rig is complete, estimated to be early in 2006.
		The Company provides onshore and offshore drilling and related services in more than 30 countries, operating a diverse fleet of 290 rigs, including two ultra-deepwater drillships, 12 semisubmersible rigs, 29 jackup rigs, 20 tender-assisted, barge and platform rigs, and 227 land rigs.
	sev.prnewswire.com /oil-energy/20050325/CGTH04624032005-1.html (240 words)

	[No title]
		Transocean Awarded Contracts for Drillship and Semisubmersible Rig Transocean Inc. announced that Hydro has awarded the company a drilling contract for the construction of an enhanced Enterprise-class drillship plus a multi-year contract award for the High-Specification semisubmersible rig Henry Goodrich.
		Both units are enhanced versions of the company's three predecessor Enterprise-class drillships, which have set drilling records in recent years, including the water-depth drilling record of 10,011 feet held by the Discoverer Deep Seas.
		In addition, Hydro has awarded the semisubmersible rig Henry Goodrich a two-year contract for drilling operations in the U.S. Gulf of Mexico.
	www.marinelink.com /Story/ShowStory.aspx?StoryID=203516 (517 words)

	Semi submersible rigs - Not logged in Help \| Manual \| Project Search \| List of Projects (Site not responding. Last check: 2007-10-21)
		Semisubmersible drilling rigs · Semisubmersible drilling tenders · Submersible drilling unit · Semisubmersible accommodation support unit
		Transocean Inc. to Reactivate Semisubmersible Rig Transocean Winner Following Commitment from Hydro.
		The FandG ExD designed semisubmersible rig is capable of operating in challenging The semisubmersible rig is engineered for stability and versatility with
	linkfollow.com /lkfl/semi-submersible-rigs.html (437 words)

	Noble Corporation Announces Noble Clyde Boudreaux Deepwater Semisubmersible Receives Operator Commit - ... (Site not responding. Last check: 2007-10-21)
		The Noble Clyde Boudreaux is a moored semisubmersible designed to drill 35,000 feet in water depths up to 10,000 feet with living accommodations for 200 persons.
		Separately, the Company announced that Shell has indicated it desires to extend the contract for the Noble Jim Thompson, a Noble EVA-4000(TM) deepwater semisubmersible, for a period not less than 90 days after conclusion of its current 200-day contract, subject to a dayrate mutually agreeable to the parties.
		This fleet consists of 13 semisubmersibles, three dynamically positioned drillships, 41 jackups and three submersibles.
	assetmanagementsurvival.com /content/view/3945/2 (1492 words)

	Marine Technology
		In order to evaluate the dredging capabiilty in 50 m water depth, a dynamic analysis of both semisubmersible-type and barge-type bucket ladder dredges was conducted.
		The vessel was designed by modifying an existing semisubmersible platform used in the oil and gas industry, while the barge-type used is a conventional bucket ladder dredge.
		Hydrodynamic coefficients, wave forces, and response amplitude operators (RAOs) of both vessels were computed by using the 3D linear diffraction-radiation software WAMIT.
	www.sname.org /MT/v36n3/v36n3p143.htm (235 words)

	Atlantia \| Homepage (Site not responding. Last check: 2007-10-21)
		This modular semisubmersible is the first ultra-deepwater structure designed specifically to extend the service life of large-diameter steel catenary risers.
		Its design began with exhaustive studies of structure motion and SCR behavior.
		One company can give you a complete, unbiased look at both approaches for your deepwater or ultra-deepwater project.
	www.atlantia.com (207 words)

	[No title]
		The unit, capable of drilling in water depths up to 6,600 ft., was delivered from the shipyard in August.
		The company also reported Noble Paul Wolff, the second EVA-4000TM conversion, has successfully drilled a well in a water depth of 8,017 ft. for Petroleo Brasiliero S.A. (Petrobras), which sets a new world water depth drilling record.
		The unit, a dynamically positioned semisubmersible unit capable of drilling in water depths up to 8,900 ft., is working for Petrobras under an initial six year contract, which commenced in May 1999.
	www.marinelink.com /Story/ShowStory.aspx?StoryID=1380 (216 words)

	Current Forecast for Transport of Semisubmersible Drilling Rig
		Please be aware that this website is no longer maintained.
		DHI Water and Environment provides operational current forecast support and general advice of hydrographical conditions during transport of a semisubmersible drilling rig (Stena Don).
		The rig/barge system is being towed from the yard in Rostock through Øresund until sufficient depth for onward tow to Stavanger of the rig alone is possible..
	www.dhi.dk /news/2001/news20010821.htm (139 words)

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