As part of a strategy to buy oilfield service brands and expand its offerings, Denver-based Frontier Energy Group LLC has purchased Canary Wellhead.

Canary Wellhead is an oilfield service company based in Oklahoma City. The deal creates a company with more than $100 million in revenue and 26 U.S. locations. The combined company will operate under the name Canary LLC.

Customers will include Hess Corp. (NYSE: HESS), Exxon Mobil Corp. (NYSE: XOM), Chevron Corp. (NYSE: CVX) and ConocoPhillips (NYSE: COP). Terms of the deal weren’t disclosed.

Energy M&A has been very active recently. Other deals have included Hanergy’s deal for MiaSoléVermillion’s purchase of ZaZa Energy Corp. and Chevron's acquisition of an interest in the Kitimat gas project.