Keane Group Inc., a Houston-based fracking-services company, said Thursday it has a deal to acquire another firm in that business, Denver-based RockPile Energy Services LLC, for $284.5 million.

“We have always held RockPile in high regard due to their commitment to quality service in the field, their well-maintained assets and facilities, and the talent they have throughout their organization,” said James Stewart, Keane’s chairman and CEO. “We are excited to have the RockPile team join the Keane family and look forward to what we can accomplish together.”

Keane is buying the privately-held business from White Deer Energy, a Houston- and New York-based private equity firm. White Deer bought RockPile from Denver-based Triangle Petroleum Corp. last September for an undisclosed amount.

The Keane deal for RockPile is expected to close July 31, subject to regulatory approval.

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