Challenging Pile Remediation Job for Seacore
01 Sep 2003
Gweek, Cornwall-based Seacore has completed a challenging pile remediation project on behalf of BP Norway for a new four-legged water injection jacket standing in 76m of water in the Valhall Field in the Norwegian sector of the North Sea.
Some of the piles being driven to anchor the jacket onto the seabed had refused short of the final target depth. Seacore, working from Rowan Drilling's Rowan Gorilla 7 jack up platform, took core samples inside the pile, prior to drillingout the material inside down to the pile toe, to enable field owner and operator BP Norway and design and construct main contractor Aker Kvaerner to inspect the pile toes and evaluate the reason for refusal.
Following vigorous audits and inspections BP Norway awarded the approximate £1m pile remediation contract to Seacore, and within just two weeks from receiving the initial enquiry from BP Norway Seacore had mobilised all of its equipment and drilling crew on location prior to starting the intense and challenging 40-day project.
Seacore integrated the use of Rowan Gorilla 7 's drill derrick and draw works in conjunction with its own Teredo 10-40 reverse circulation drill rig to allow long stands of Seacore 300mm riser pipe to be handled to reduce pipe running activities.
'The Rowan Drilling crews worked very well with us, enabling a safe and efficient integration of our specialist large diameter drilling equipment and standard offshore oil and gas drilling equipment, ' says Seacore divisional manager Jason Clark.
Seacore has also just completed working directly for BP in Azerbaijan in BP's new Shah Deniz gas field, assisting in installing the seabed template and then directly installing 15, 42in diameter pre-conductor well casings from the semi-submersible Istiglal using Seacore's offshore Teredo 10-40 heave compensated drill and new down hole Packer Drive System.
The company is also undertaking pre-engineering feasibility for Saipem, looking at provision of heave compensated large diameter drilling equipment for pile relief drilling at the BP Clair Field.
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