Sunday, August 19, 2012

More on Ultra-deepwater drilling Semi-rig

Scarabeo 9 is one of the largest offshore drilling rigs in the world. It is the first (and as of 2012 the only) Frigstad Engineering developed Frigstad D90 design rig ever built. The rig is able to operate at the water depth up to 11,811 feet (3,600 m), which is classified by the oil industry as "ultra-deepwater", and its drilling depth is 15,200 metres (49,900 ft). The water depth still suitable for its operations is twice as much as for Deepwater Horizon.The drilling equipment was provided by the Norwegian engineering company Aker Solutions.
Scarabeo 9 has a length of 115 metres (377 ft) and a breadth of 78 metres (256 ft). Its gross tonnage is 36,863, dead weight tonnage 23,965, and net tonnage 11,059 tonnes. The vessel is powered by eight Wärtsilä 12V32 diesel engines. It is equipped with two cranes.

DNV Class Notation:
1A1 Column-stabilised HELDK CRANE ECO F-AM DYNPOS-AUTRO   POSMOOR DRILL

Flag: Bahamas Signal Letters: C6YV7

Port: NASSAU
Owner: Saipem Maritime Asset Management Luxembourg S.A.R.L. GT : 36,863
NT (ITC 69): 11,059

Manager: SAIPEM SPA  DWT: 23,965
Yard: Yantai Raffles Shipyard Co. Ltd. (114020) Year of Build: 2011
Dynamic positioning:  DP class 3.
Eight 4.3 MW azimuth thrusters.
Mooring system: Four double drum winches with eight fairleads for connection to pre-set system.

Ram rig:  Hydraulic dual ram rig. Both main rig and auxiliary rig have 1,000 s.t capacity and full drilling capabilities.  Set back for 50,000 ft drill string/casing in 88-92 ft stands.
Rotary table: Two 60.5” with independent drive.
Top drives:  Two top drives with 1,000 s.t capacity.
Riser tensioners:  Six in line hydraulic cylinder riser tensioners.
BOP:
Two 18.75” x 10,000 psi wp annular preventors.
Five 18.75” x 15,000 psi wp ram preventors.
Riser:  10,000 ft of 21” riser.

The rig includes quarters for up to 200 workers. There is also a helicopter deck suitable for MI8, S61, and EH101 helicopters. The rig has been described by the industry sources as "the latest technology for deepwater drilling operations".

The rig cost US$750 million to build. It was constructed at the Yantai Raffles Shipyard in Yantai, China. The contract was signed on 5 April 2006, the keel was laid on 1 April 2008, and originally the construction was to be completed in September 2009. After several delays at the Yantai Raffles shipyard it was shipped to the Keppel FELS shipyard in Singapore for extra work completion in 2010.

The rig was delivered to Saipem on 25 August 2011. On her maiden voyage to Cuba, Scarabeo 9 was escorted around the Cape of Good Hope by the Fairmount Marine owned tugboat Fairmount Glacier.


More on Semi rig design :

Two years ago, Keppel FELS delivered the third DSS 21 deepwater semisubmersible drilling rig to Maersk Drilling (Maersk) 43 days ahead of schedule and with a perfect safety record, garnering a bonus of $400,000.

Tong Chong Heong, CEO of Keppel O&M, said, “We are proud to be Maersk’s preferred partner for its fleet expansion plans. The safe and early completion of Maersk Deepwater Semi III attests to the astute choice made by Maersk to build the premium fleet with Keppel FELS, as well as the solidarity and calibre of our teams working hand in glove with one another. The success of this Series of semis is built upon our long term partnership with thought-leading operators such as Maersk, who have provided the necessary platforms for our technologies to gain market ascendance".

"The demand for modern drillings rigs has increased over the past years concurrently with the growing technical challenges we are faced with in the drilling industry. The search for new finds is moving to deeper waters and areas with complex soil conditions and more advanced drilling rigs are needed to meet those challenges. Our ultra deepwater semisubmersibles are well equipped to meet this demand,” Mr Claus V. Hemmingsen, CEO of Maersk Drilling added.

DSS Series rigs are highly cost effective exploration units capable of drilling down 10,000 m (30,000 ft) wells and operating at a water depth of 3,000 m (10,000 ft). The Series also features a dynamic positioning system, with the ability to attach to a prelaid mooring system.

DSS Series rigs are particularly well suited to drill deep and complicated wells in areas such as offshore West Africa, Brazil, the Gulf of Mexico and Southeast Asia, and may be further customised to meet the unique challenges of each location.

• Length Overall approximately 117.00 m

• Length of Pontoon 114.50 m
• Breadth Outside Pontoon 78.00 m
• Pontoon Breadth 17.50 m
• Pontoon Height 10.00 m
• Columns 17.00 x 17.50 m
• Longitudinal Distance between CL of Columns 61.50 m
• Transverse Distance between CL of Columns 60.50 m
• Length of Main Deck 78.50 m
• Breadth of Main Deck 78.00 m
• Transit draft 9.7 m

• Survival draft 16.00 m
• Operational draft (min.) 18.50 m
• Operational draft (max.) 20.50 m
• Transit displacement(Approx.) 38,960 Mt
• Survival displacement(Approx.) 48,295 Mt

Semi Rig Equipment1


Courtesy of Maersk Drilling


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