Jurong Shipyard Skids Hull in Rig Construction

Thursday, June 26, 2003
Jurong Shipyard Pte Ltd (JSPL), a subsidiary of SembCorp Marine Ltd has skidded the massive 14,000 ton upper hull of a $285 million semi-submersible rig over the lower hull. It is reportedly the first of its kind involving the skidding of such a heavy structure. It was conceived, designed and constructed over a two-year period. On April 11, 2001, JSPL in collaboration with associated company PPL Shipyard Pte Ltd (PPL) entered into a fixed price agreement with GlobalSanteFe Corporation (GSF) for the construction of two units of Friede & Goldman ExD designed deepwater semi-submersible drilling rigs. Valued at $285 million each, inclusive of equipment, project management and other services furnished by client, the agreement also covers options to build two additional units of semi-submersible to be exercised at specific dates. The scope of work entails furnishing labor and materials to design, construct, equip, complete, test and deliver afloat to GSF these drilling units. JSPL designed and embarked on a construction methodology in which the upper and lower hulls were built simultaneously in two halves, a departure from the traditional method of installation by small sub-blocks onto the lower hull while afloat using floating cranes. Weighing approximately 14,000 tons, the upper hull, measuring 8.6 metres in height and 75 metres in length and width, was built on land that was reinforced to take the substantial load. The upper hull was then fully outfitted with installations, including a drilling tower. The lower hulls, consisting of two pairs of pontoons and columns, were built separately in JSPL’s No. 5 Drydock and subsequently shifted into position in the No. 3 ULCC Drydock prior to the skidding and mating operations. This Drydock measures 380 metres in length, 80.2 metres in width and 14 metres in depth. During the skidding process, the upper hull, which was constructed on land over the skid truss, was connected to 12 skid shoes. The keel blocks and supporting truss were then laid on the ULCC Drydock. The skidding beam on which the upper hull was skidded on had a length of 188 metres, inclusive of land and drydock area. Upon satisfying the regulatory requirements, the upper hull was then pulled by four computer-controlled hydraulic-operated strand jacks. The whole process took 11 hours to complete and was well within the planned schedule. Scheduled for delivery in the first quarter of 2004, the accomplished engineering feat has placed Jurong Shipyard in the league of the world’s new rig building yard.

Maritime Today


The Maritime Industry's original and most viewed E-News Service

Maritime Reporter July 2016 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Shipbuilding

Navig8 Acquires Chemical Tanker from STX

Navig8 Chemical Tankers Inc (the “Company”) (N-OTC: CHEMS), an international shipping company focused on the transportation of chemicals, today announced that it

Damen ASD Tug for Mexico

Damen congratulates Reylaver on the safe arrival and naming ceremony of the new ASD Tug 2411 Jesus. In order to reach her owners, the vessel undertook, on her own keel,

Hyundai Bags NZ Defence Order

Hyundai Heavy Industries (HHI), the world’s largest shipbuilder, has won an order to build a 23,000 ton class logistics support vessel for New Zealand Defence

Navy

ASEAN Breaks South China Sea Deadlock

Manila drops request to refer to court ruling in statement. Southeast Asian nations overcame days of deadlock on Monday when the Philippines dropped a request

China sets up South China Sea environment protection fund

China has set up a 15 million yuan ($2.25 million) environmental protection fund for the South China Sea having already spent double that in the past four years,

Piracy Drops to 21-year low - IMB

Piracy and armed robbery at sea has fallen to its lowest levels since 1995, despite a surge in kidnappings off West Africa, according to a new report from the International

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Navigation Offshore Oil Pod Propulsion Port Authority Ship Electronics Ship Repair Ship Simulators Sonar
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.0804 sec (12 req/sec)