Voyager Interests, a Houston private equity firm specializing in investments in the energy services and equipment sector, has acquired Tulsa, Oklahoma-based Aegion Coating Services (ACS), according to a Jan. 4 press release.

Financial terms for the transaction were not disclosed.

ACS is a global leader in field joint coating services, using robotics to apply protective coatings to internal and external segments of natural gas, crude oil, potable water and saltwater pipelines, Voyager said. ACS’ services are used throughout the Middle East, South America and Asia.

Robert Trainer, partner at Voyager, said ACS has established a track record of “excellence in the industry for more than 40 years. We are thrilled to welcome them into the Voyager family and are confident that, together, we will achieve new heights of success.”

Bryan Kirchmer, president of ACS, said the partnership with Voyager presents an new chapter for ACS, “where we have access to capital and a growth mindset that will enable us to provide an enhanced service proposition to our customers.”