GENERAL INFORMATION (part 1)
The types of activities in this field can be summarised as follows:
- Placing of jackets, piles, topsides, vent booms and other related parts
- Transport and installation of Gravity Based Structures
- Module lift for the construction of Floating Production Storage Offloading vessels and GBS structures
- Decommissioning of topsides and jackets
Baraka jacket
Lifting and installation of Baraka jacket in Tunisia.
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Anamaria A Jacket
Execution date: August 2008
Execution place: Adriatic sea
Client: SAIPEM
Scaldis scope of work: Lift, upending and set down of the Annamaria A jacket, pile lifting and upending, hammer handling and pile driving
Weights lifted objects: 945T Annamaria A jacket & +/- 243T 4 x piles
Assisting tug in field: Stevens Ocean
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Installation of IVANA K platform, Croatia
The lifting weight is 1900 tonnes.
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GENERAL INFORMATION (part2)
Lifting and installation Annamaria A Deck, Croatia
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Decommissioning of platform, jacket and pils, REM island North Sea, The Netherlands
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INSTALLATION HASDRUBAL A PLATFORM, TUNISIA
Scaldis has completed the installation of the Hasdrubal oil and gas platform in July 2008. The jacket and topside were loaded out from the Heerema Vlissingen yard quayside in Vlissingen and transported to the Gulf of Gabes, offshore Tunisia. BG Tunisia is the operator of Hasdrubal and owns the field together with ETAP
Construction of the 70-m, 900mt jacket and 1400mt platform started in June 2007 at the Heerema Vlissingen yard. The topside has five decks and measures 46 x 30 x 29 m. They were each loaded onto a transport barge, together with foundation piles and other project items, and towed to the Mediterranean.
Rambiz departed from Vlissingen to Tunisia as well, with the project equipment on board i.e. piling, grouting, ROV, survey equipment. The project team was mobilised in Tunisia and sailed out to the Rambiz in the field by a crew boat. The location was ca. 110 km offshore Tunisia, with a water depth of approximately 60 m.
The first operation for the Rambiz was the stabbing and piling of two so called docking piles in and through a template, pre-installed on the seabed. The purpose of the docking piles was to place and position the jacket over, so that the position and heading of the jacket were fixed.
Rambiz then lifted the four 101m long foundation piles off the transport barge, upended and stabbed them in the sleeves on the jacket in a simultaneous lift of both Rambiz starboard crane and the 600t crawler crane on deck.
All piles were vibrated into the seabed until a safe and stable depth was obtained to put the piling hammer on top. The IHC S-500 piling hammer piled the piles to the required penetration. The piles were connected to the jacket sleeves by grout.
The topside rigging was connected to the Rambiz cranes, and the seafastenings on the barge were disconnected. Rambiz lifted the 1400mt topside from the barge deck to a height sufficient to reach over the jacket and moved towards the jacket.
The topside was placed nicely on top of the jacket and hook-up and commissioning was performed by the Heerema Vlissingen team on board, while Rambiz acted as an accommodation vessel for the people that worked on the newly placed platform.
OIL RIG LIFTING
LIFTING OIL RIGS AT AS NYMO
Once more the fact that the oil industry is booming have been confirmed by this project. Lifting four sets of oil rigs (drill floor, tower and mud room) from shore to a transport vessel in a period of three years.
Each rig is fabricated and composed at the construction yard of AS NYMO and consists of a drill platform including a tower and a mud room. AS NYMO is situated at Grimstad, Norway.
Rambiz proves here her multi functionality. Because of a large varying range of lifting weights (from 80 to 1400 tonnes), each of the three lifts had his own configurat.
1. Drill tower: (weight 80 tonnes)
2. Mud room: (weight 300 tonnes)
3. Drill floor: (weight 1400 tonnes)
A good corporation in preparation and execution the project with the client, made the first campaign to a successful end.
ALVHEIM FPSO
Vetco Aibel - Alvheim FPSO - lifting operations at Haugesund Norway
From the moment this project came in for tendering purposes, it was very clear that this job was just right for our heavy lift vessel Rambiz.
The project consist of the transfer of 10 modules from shore to the FPSO vessel ALVHEIM. FPSO stands for Floating Production, Storage and Offloading vessel. Alvheim FPSO-formerly a brand new oil tanker, built in the nineties and property of marathon oil-has been rebuilt by Vetco Aibel shipyard, Scaldis' client. A varying weight from 300 tonnes to 1000 tonnes to be lifted combined with a large outreach made it possible to take up the maximum of Rambiz capacities and functionality. Modules with a weight more than 600 tonnes were transferred by a tandem lift, smaller modules were transferred by a single lift.
Lifting the heaviest loads by two cranes had also a positive impact on the load transfer into the modules supporting structure during the lift. While the modules were positioned onto the main deck, the ship could stay in the dry dock. During the positioning operation, modules were lifted over the dry docks wall. With exception of the positioning area at the main deck, all other rebuilding activities at the ALVHEIM FPSO could go on further. Other specification what made this project to a real challenge was: a clearance of no more then 0,5m at both sides of the module during positioning and a required tilt angle of 1° -2° towards ALVHEIM FPSO. Depending on the positions of the centre of gravity, the rigging length of each lift had to be adapted by using extra shackles and/or small slings.
Scaldis project team in combination with a good and constructive corporation with Vetco Aibel and the watchful eye of the warranty surveyor during the preparation and the execution of the lifting works resulted in this successful project.
OIL & GAS WORKS
