An affiliate of Gulf Coast Specialty Energy Services has acquired Marlin Services LLC, a pipeline maintenance and repair company based in Gray.

The price was not disclosed.

Marlin also does metal fabrication and specialty industrial coatings. The company also has locations in Houma, Winnie, Texas, and Prattville, Alabama.

Marlin is the fourth Louisiana oilfield services firm Gulf Coast has added to its portfolio. The others are Houma-based Frogco Amphibious Equipment, Metairie-based Triton Diving Services LLC and Specialized Environmental Services in Carencro.

Gulf Coast Specialty Energy Services is a portfolio company owned by Grey Mountain Partners, a private equity firm based in Boulder, Colorado. Gulf Coast consists of companies Grey Mountain owns or holds the majority stake in.

Grey Mountain has about $700 million in assets under management.