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  1. DNV GL issues guidelines on drilling rig air gaps

    Offshore staff HOVIK, Norway – Around 100 drilling semisubmersibles approved by DNV GL will undergo further reviews following the accident offshore Norway late last year involving the COSLInnovator . It appears that a limited number of rigs will be subjected to modifications or operational limitations. The COSLInnovator was drilling for Statoil in the Troll field when it was struck by a large, steep wave, which shattered several windows on the rig’s two lower decks. One person was killed. Ernst Meyer, DNV GL director for Offshore Classification, said: “Since the incident, we have made great efforts to identify what happened, understand how this could happen and, most importantly, implement actions to prevent similar incidents from occurring again. “We have been working with rig owners, designers, operators, and authorities towards a common goal; to ensure the safety of all those working on board the rigs.” Petroleum Safety Authority Norway’s investigation concluded earlier this year that its findings must be used to prevent similar incidents occurring in the future.  In response, DNV GL published a new technical guideline (OTG-13 – Prediction of air gap for column-stabilised units), said to deliver a consistent and updated approach for calculating the air gap - the clearance between the highest wave crest and the bottom of the deck box in all relevant sea conditions. Last week, DNV GL asked all owners of semis that it had classed to provide updated documentation of each rig’s air gap. Those that can, based on the new guideline, provide a positive air gap will be able to operate as before without reinforcements or operational limitations. This should be the case for most semis operating on the Norwegian shelf.  “A limited number of rigs may not have a positive air gap,” Meyer said, “but most of these will be able to avoid changes. The prerequisite is that they are able to document a positive air gap for a specific location, or that they simply do not have windows that may be exposed to waves.” As for those rigs where the owners cannot demonstrate a positive air gap in all sea conditions – including the hundred-year wave – Meyer added: “Initially (for the next winter), these rigs will be required to remove windows in exposed zones. “If the strength calculations show that further structural modifications are necessary, such modifications will be required as part of the permanent solution. “The most important thing is that the windows are removed before the coming winter. This action eliminates the largest risk elements if a similar incident occurs.” Rigs certified for worldwide operation must be documented according to North Atlantic wave data. Most rigs operate in milder areas, such as the North Sea , and can postpone modifications that might be needed for the Norwegian Sea or Barents Sea . 09/28/2016 Share your news with Offshore at news@offshore-mag.com

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    Wed, 28 Sep 2016

  2. Jones Energy completes deal to enter STACK, SCOOP

    Jones Energy Inc., Austin, has closed on its acquisition of 18,000 net acres in the Oklahoma STACK-SCOOP play from Scoop Energy Co. LLC, a platform company of American Energy Partners LP., for $136.5 million.

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    Wed, 28 Sep 2016

  3. Spectrum outlines goals for frontier Mozambique 2D seismic survey

    Spectrum has received Tender Area 2 covering the southern Rovuma and northeastern Zambezi basins offshore Mozambique, and has proposed a long-offset Broadband 2D multi-client seismic survey.

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    Thu, 29 Sep 2016

  4. Roc-2 appraisal well confirms gas, liquids off W. Australia

    The Quadrant Energy Ltd.-operated Roc-2 appraisal well, drilled offshore Western Australia in permit WA-437-P, has recovered condensate-rich gas samples from several zones .

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    Fri, 23 Sep 2016

  1. Dynegy Reports Illinois Power Agency Capacity Procurement Event Results

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    Sat, 24 Sep 2016

  2. Initial Lancaster well tests indicate possible resource upgrade

    Hurricane Energy has provided more details of its pilot well test on the Lancaster basement oilfield west of Shetland.

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    Thu, 22 Sep 2016

  3. Spectrum wins Mozambique seismic

    Spectrum Geo has recently been awarded Tender Area 2, which covers the southern Rovuma and northeastern Zambezi basins offshore Mozambique, proposing to undertake a comprehensive long-offset broadband 2D multiclient seismic survey.

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    Wed, 21 Sep 2016

  4. Consortiums sign agreements to fund US$111.4 million for two small hydropower projects in far-western Nepal

    The Nepal Department of Electricity Development, in conjunction with the government’s Western Uplands Poverty Alleviation Project (WUPAP), issued licenses for the development of two small hydroelectric projects located in the Bajhang district in October 2014. According to reports published Sept. 7, two consortiums have signed agreements to fund construction of each plant, the total cost of which is about US$111.4 million. 

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    Thu, 8 Sep 2016

  5. Latest Manora production well set for service in November

    The jackup Atwood Orca has completed drilling the MNA-17 ST1 (AJ) production well in the central fault block of the Manora oil field offshore Thailand.

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    Thu, 15 Sep 2016

  6. Nuclear Power News: Japan's ex-leader backs sick US sailors who blame radiation

    Several hundred American service personnel who say they became sick from radiation after participating in relief operations for the 2011 tsunami that set off the Fukushima nuclear disaster are now getting high-profile support in Japan.

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    Wed, 7 Sep 2016

  7. West of Shetland well could lift Lancaster oil estimate

    Hurricane Energy says testing and logging operations have finished on the 205/21a-7 pilot well on the Lancaster oil field west of Shetland.

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    Fri, 9 Sep 2016

  8. Wallingford Energy files for 100 MW addition to Connecticut power plant

    The targeted commercial operation start for the completed project is April 1, 2018

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    Thu, 15 Sep 2016

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