"Reversing oil and natural gas pipelines or switching the product they're carrying can have a 'significant impact' on the line's safety and integrity—and 'may not be advisable' in some cases, federal regulators told pipeline companies in a recent advisory."
The Senate's vote next week on legislation to force approval of the Keystone XL pipeline may come down to a handful of Democrats, who are now being courted aggressively by advocates on both sides of the debate."
"The U.S. Department of Homeland Security issued an updated alert last week stating that a variant of the BlackEnergy malware had infiltrated the SCADA systems that control critical infrastructure, including oil and gas pipelines, water distribution systems and the power grid."
"The controversial government program that funded failed solar company Solyndra, and became a lighting rod in the 2012 presidential election, is officially in the black."
"Halliburton Co. is in talks to buy Baker Hughes Inc. in a deal that would combine two of the largest and oldest names in the energy business as plunging oil prices send the industry into a downturn."
"ANCHORAGE -- Six environmental groups sued Monday to throw out a federal agency rule that concludes oil exploration off Alaska’s northwest coast has a negligible effect on walrus."
"The U.S. State Department must halt plans to expand an oil sands pipeline route from Canada to Wisconsin until possible environmental harm has been closely studied, several green groups said in a lawsuit filed on Wednesday."
"Two years ago, in a preemptive move, Shell sued a host of environmental and advocacy groups to prevent them from suing Shell over its plans to drill for oil in the Arctic. On Wednesday, a federal appeals court called Shell's legal strategy 'novel' and ruled it unconstitutional."
"Health concerns about oil field fracking have been focused on the mixed brew of chemicals injected into wells. But it is another innocuous-sounding substance — sand — that poses a more serious danger to workers."
"Bills to take approval of the contentious Keystone XL pipeline from Canada out of the hands of the Obama administration could be headed for votes in the U.S. Senate and House of Representatives.
Democrat Mary Landrieu, chair of the Senate Energy Committee, said she would propose debate later on Wednesday and a vote on Thursday on a bill floated in May to approve the project, which would deliver heavy Canadian oil sands crude to the U.S. Gulf Coast.
Advertisement 
