Oneok said it acquired the Sage Creek gas processing facility in Wyoming from an undisclosed seller for $305 million. The site is capable of handling 50 million cubic feet of natural gas from the Powder River basin.
The company said it would invest another $135 million to upgrade pipelines and well connections at the Wyoming site.
"The Sage Creek plant gives Oneok Partners additional natural gas gathering and processing capacity in a region where producers are actively drilling that has significant long-term growth potential," Oneok President Terry Spencer said in a statement Monday.
The company said it already operates more than 1,000 miles of pipelines and associated networks in Wyoming.
The U.S. Energy Department said Wyoming accounted for 9 percent of total U.S. marketed natural gas in 2011. The state produces 40 percent of the nation's coal.
Pregnant Mila Kunis wins 'Best Villain' at MTV Movie Awards
Biologists detail four new deep-sea 'killer sponges'