Harvest Partners, the New York-based private equity firm, made an investment in Seminole Energy Services, the Oklahoma-based natural gas industry solutions provider.

Harvest will add a pair of directors to Seminole’s board and obtain additional governance rights that were not specified. Details of the transaction were not disclosed and calls to Harvest were not responded to by press time.

Michael DeFlorio, a senior managing director, and Christopher Whalen, a principal, worked on the deal for Harvest.

Earlier this year, Harvest Partners joined Friedman Fleischer & Lowe and Pine Brook Road Partners investing $115 million in Green Bancorp. Earlier in July, Harvest backed tech-staffing company Insight Global, also, in a deal where terms went undisclosed.

Already, Harvest has invested in Global Power Equipment Group, another Oklahoma-based energy services firm.

The energy sector has drawn a significant amount of activity in the first half of 2010. Just this week, Navigation Capital Partners agreed to acquire LEPService, a smart grid supporting infrastructure development. Last month, Omni Energy went private, selling to Wellspring Capital for $122 million.

Strategic deals, too, have been regular. Reliance Industries has repeatedly reached into the US to make investments (the company is based in India), including its acquisition of Texas-based Pioneer Natural Resources, in its ongoing attempt to boost access to shale gas assets.

Energy industry