Chesapeake Midstream Partners, an L.P. formed by Chesapeake Energy Corporation and Global Infrastructure Partners to operate natural gas gathering systems in the Barnett Shale and Mid-Continent regions, filed on Tuesday with the SEC to raise up to $345 million in an initial public offering. The Oklahoma City, OK-based company booked $457 million in sales over the last 12 months and plans to list its units on the NYSE under the symbol CHM. Citi and Morgan Stanley are the lead underwriters on the deal, for which pricing terms and timing were disclosed.