WorldOil Billionaire seeks to replace 40% of Occidental’s board of directors Carl Icahn formally asked Occidental Petroleum Corp. investors to help him replace four of the company’s 10 board members and potentially push for a sale. ABS to class Calm Oceans' innovative Mono Column jackup ABS will class an innovative new self-elevating platform with a unique triangular mono column design from Calm Oceans Pte Ltd. Permian watch: America’s hottest shale play is slowing down The engine of America’s shale boom is beginning to sputter. Fast and lean: How North Sea oil is learning from American shale The U.S. oil boom changed the petroleum industry forever. Now its philosophy is being adopted by conventional producers in the North Sea. No fast exit from Permian oil for private equity, RS Energy says Private equity has been ramping up its investment in Permian basin oil and natural gas production, but the old strategy of selling out after a few years is no more, according to RS Energy Group. U.S. DUC shale backlog declines, except in Permian basin The backlog of DUCs in major U.S. shale plays fell for a fourth straight month, the longest stretch of declines since 2016. Decommissioning in Shetland expands with the arrival of more North Sea structures The Dales Voe decommissioning facility in Shetland is one step closer to becoming a center of excellence for recycling offshore structures from the North Sea with the arrival of two new installations for decommissioning by strategic partners Veolia and Peterson. Callon to acquire Carrizo in $3.2-billion stock transaction Callon and Carrizo OandG have approved an agreement where Callon will acquire Carrizo in an all-stock transaction valued at $3.2 billion. Norwegian Petroleum Directorate reports high activity in the first six months of the year Production on the Norwegian shelf is holding steady at a high level. Many projects are in the development or planning phases. Britain raises Gulf shipping threat to highest level possible Britain raised the threat level to the highest possible for ships operating in the Persian Gulf as tensions escalate in a region accounting for a third of seaborne petroleum trade.