Rigs are vanishing at a rapid clip in the United States, but oil and gas drilling activity is also falling worldwide. The international rig count fell by 144 in April from a month earlier, bringing the total down to 915, according to Baker Hughes. Latin America was hit the hardest, with a loss of 80 rigs. Colombia and Argentina made up the bulk of those losses – the rig count in Colombia fell by 21, and in Argentina by 38. The Colombian government said that oil production would fall. “If prices were to fall drastically to an average of around $30 this year, well then we would be talking about average production close to 790,000 to 800,000 barrels a day,” Armando Zamora, the president of Colombia’s National Hydrocarbons Agency said on Thursday. That would be down from a prior forecast of 900,000 bpd. Argentina is in even worse shape. […]