One Oil Field Services, 5300 E Saunders St, Laredo, TX 78041, US

FESCO is a petroleum engineering services company. Its services include production testing, reservoir engineering and pipeline pigging. The company also offers a variety of hydrocarbon laboratory services that include chromatograph analysis, emission study, brine water analysis and tank liquid distillation. It also offers a variety of equipment that includes capillary tubings, three-phase separators, water bath heaters, choke manifolds, sand separators, electronic gas measurement meters and downhole sampling tools. The company also offers design, collection and interpretation services for reservoir pressure transient data. FESCO has been operational for more than 50 years and has its office in Alice, Texas.