CLK Holding A.S., a drilling fluids service company, offers fluids, products, and engineering services to the oil, gas, and geothermal drilling industries in Turkey and internationally. It provides customized drilling fluid systems and specialty products for various types of drilling activities, such as water based drilling fluids, oil based drilling fluids, and pneumatic systems. The company also offers drill-in fluids, completion fluids, and clear brines; and alkalinity and hardness control agents, bactericides, corrosion inhibitors, deflocculants-dispersants, defoamers, fluid loss control agents, foaming agents, lost circulation materials, lubricants, salts, shale inhibitors, spotting fluids, surfactants, viscosifiers, weighting materials, and oil-base drilling fluid additives. In addition, it provides drilling and completion fluids, and filtration engineering services; consultancy services for drilling fluids, completion fluids, filtration systems, drilling fluid additives, and laboratory tests; laboratory services, including quality control tests, laboratory comparison tests, drilling fluid testing reagents and equipment, and full furnished mud laboratory containers; and duplex filtration units and filtration engineering services for completion fluid filtration. CLK Holding A.S. was founded in 2005 and is based in Ankara, Turkey with a locations in Istanbul, Turkey.