Established in 1966, Quadco specializes in the sale, testing and repair of drilling equipment and pressure relief, pipeline and plant valves, as well as instrumentation and calibration services. It offers a range of products, such as centrifuges, desilters, ultrascreen shakers, and mud cleaners and agitators. Quadco operates a mobile truck fleet for field test and repair services. It also provides repair services for transmitters, controllers, recorders, flowmeters and pressure control valves. Quadco provides products from several manufacturers, including Baldwin Filters, CEMCO, Derrick Equipment Company, Pressure Control Engineering, SPM Flow Control, Texas Oil Tools, Varco BJ Oil Tools and Varco Drilling Systems.