Case Studies

Our case studies will give you an idea of the vast range of the inspection, testing and lifting projects we have carried out for the offshore, oil and gas, mining, construction, engineering and many other sectors. If you would like to know more about how we could help you, please contact us on tel. 01642 455 920 or by email. info@shaw-lifting.com.

Kittiwake Loading Buoy

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In 2008, Shaw Lifting were required to carry out testing to various bespoke lifting frames by their client, who were involved in the decommissioning of the Kittiwake Loading Buoy. The Kittiwake Loading Buoy (KLB) was installed offshore in the Kittiwake field in the central North Sea, approximately 2 kilometres from the Kittiwake Oil Platform. The KLB was used primarily to offload oil into tankers but was decommissioned in 2008.

Kittiwake Loading Buoy Lifting Beam Test Clump Weight Basket Test Buoyancy Tank Basket Test

The decommissioning process consisted of the dismantling and transfer to shore by vessel where it was deconstructed and recycled. Deepocean had various Steel Baskets designed and fabricated to load transport the components of the KLB on the Volantis Vessel. These included Baskets for recovery of the Clump Weights, Concrete Mattresses and Buoyancy Tanks.

Shaw Lifting were asked to carry out Proof Load Testing of the Baskets at their Heavy Lift Quay in Teesside, prior to their commissioning on the Volantis Vessel. Shaw Lifting had to devise testing procedures which would test all the Lifting Points of the Frames to the correct tonnages, as they would be used whilst in operation. The Test also had to comply with DNV Marine Lifting Operations, Certification of Lifting Appliances and the clients  Specifications. Taking into account the Fabrication drawings and specifications, Shaw Lifting manufactured the various Wire Rope Slings and supplied all dedicated rigging for lifting the frames.

Once the rigging was completed, Shaw Lifting organised delivery of the test equipment, including hire of a weight tray, live weights and a 200.0 Tonne SWL Calibrated Load Shackle and supply of Polyester Round Slings for the testing.

The first of the tests carried out was to the basket frames. A 28.0 Tonne SWL Lifting Beam was fabricated to be used in conjunction with the frames. The Beam was lifted by the dedicated 2-Leg Wire Rope Sling by the Jib Crane and then Wire Slings connected underside ready to be connected to the Basket Frames.

The first test was to the Concrete Mattress Basket. The Basket was loaded with the Live Weights across the load bearing points, then connected by the outer Lifting Eyes to the Lifting Beam via the Wire Slings and Shackles. The crane lifted the complete rig off the deck. The Frame was visually inspected whilst held to check for any signs of distortion in the frame. The second test was repeated for the Clump Weight Basket.

The last Basket test was to the Buoyancy Tank Basket Frame. This was specially designed to carry the part of the Buoyancy Tank structure on a cradle system on the top of the Basket. The test procedure replicated this by laying a Modular Spreader Beam across the bearing points of the cradle and slinging Polyester Roundslings over the beam and connecting to the Weight tray underneath. Once the Basket was lifted by outer Lift Points, the weights were lifted by the Modular Spreader Beam, testing the Cradle and the Lifting Eyes both together.

Once the testing was complete, Shaw Lifting organised MPI and NDT of the welds and Lifting Points of the Basket Frames and issued relevant Proof Load LOLER Certificated for the Baskets.

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