Seaway Falcon Performs Deepest Pipelay

Friday, April 05, 2002
Stolt Offshore in Houston has successfully completed a deepwater subsea to subsea installation, including one flowline and one umbilical, for Shell's single well Einset project in the Gulf of Mexico, reports Bjorn Koi, Stolt's project manager. "Subsea to subsea installations are 'rare' in the industry but may become more prevalent as we move into deeper waters. To date, most subsea tie-backs have been supported by host platforms in shallower water. "In the case of Einset, we tied back a new deepwater well to existing subsea infrastructure, also located in deepwater. This achievement demonstrates how the industry is applying proven technology while effectively utilizing deepwater construction vessels, such as Stolt's Seaway Falcon," said Koi. He added that the "Seaway Falcon" multipurpose vessel achieved its deepest pipelay to date, with the Shell Einset well located in 3,463 ft. of water on Viosca Knoll Block 872. The Stolt crew completed the umbilical and flowline installation project in a single mobilization, using a J-lay installation method. The project scope included the setting of two long base line (LBL) arrays-a collection of acoustic beacons or transponders-to ensure the accurate installation of two Shell-supplied pipeline end manifolds (PLEMs) at each end of the six-inch flowline; i.e., one at the Einset well and one at the SE Tahoe 1 well. The two pipeline jumpers, installed by others, connected the PLEMs to the wells. Stolt's "Seaway Rover" ROV (remotely operated vehicle) support and survey vessel completed the LBL arrays, installing six transponders at Einset and eight transponders at SE Tahoe 1 in advance of the flowline installation work. "The accuracy rate in using the LBL array is very high. We hit our target boxes for installing the PLEMs with excellent precision due to the good work of the 'Seaway Falcon,'" said Koi. The PLEMs themselves represented a challenge as well, says Koi, explaining that Stolt designed and fabricated a purpose-built PLEM handling frame to accommodate their size and facilitate installation. Each PLEM was approximately 25 feet tall, with the PLEM installed at Einset weighing 24 metric tons and the PLEM at for the SE Tahoe location weighing 18 metric tons.
Maritime Reporter March 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Legal

Mitsui O.S.K. Ship Ready To Leave Chinese Port

Japanese shipping firm Mitsui O.S.K. Lines Ltd said on Thursday that its ship, the "Baosteel Emotion" 226,434 deadweight-tonne ore carrier, is ready to leave

China Court Releases Japanese Ship After Payment

A Chinese court said on Thursday that it has released a ship owned by Japanese shipping firm Mitsui O.S.K. Lines Ltd, which had been seized in a contract dispute, after the Japanese firm paid up.

Mitsui Pays $40 Mln Compensation After Seizure

Japanese shipping firm Mitsui O.S.K. Lines Ltd has paid about 4 billion yen ($39 million) in settlement to China as compensation stemming from a wartime contractual obligation,

Offshore

Offshore Oil & Gas: Brazil’s Northern Frontier

In an effort to spread out oil and gas production to other parts of the country and increase overall oil production, Brazil has finally intensified hydrocarbon

Safety the Focus as Heavy Lifting Picks Up

Modern heavy lift capabilities are crucial for safe, efficient operations offshore Heavy lift operations offshore are an awe-inspiring feat, but an operation that

Azeri Shipyard, BP Sign Vessel Construction Contract

Azeri state energy company SOCAR's shipyard and British oil major BP have signed a $378 million deal to design and build a subsea construction vessel for the Shah Deniz II gas project,

 
 
Maritime Contracts Maritime Security Maritime Standards Navigation Offshore Oil Port Authority Salvage Ship Electronics Ship Repair Shipbuilding / Vessel Construction
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: 0.0983 sec (10 req/sec)