Producers Diamondback Energy Inc., FANG -1.07% Parsley Energy Inc. PE -2.18% and Centennial Resource Development Inc. CDEV -1.63% either plan to operate fewer drilling rigs in 2019 or recently lowered production plans in the country’s most active drilling region, the Permian Basin in Texas and New Mexico, the companies have said in public statements and filings. Spending Less for More Oil Shale companies have brought down their drilling costs since the last downturn. Sources: Drillinginfo (shale capital expenditures); Energy Information Administration (crude oil production) A spokeswoman for Parsley declined to comment. The other companies didn’t respond to requests for comment. Diamondback said earlier this month that it would immediately drop three of its 24 rigs, with the possibility of operating as few as 18 rigs next year. The company expects to raise oil and gas production by roughly 30% at current prices, in part, reflecting Diamondback’s acquisition of Energen […]