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Innospec has acquired privately held Strata Control Services, a provider of thickeners and sealants used with drilling mud. Strata, based in Crowley, La., had sales of approximately $20 million in 2012. Innospec says the acquisition is only the first in a business that it plans to grow further. Meanwhile, Post Oak, a private equity firm with a focus on energy, has bought a majority stake in Refinery Specialties, a Hempstead, Texas-based oil-field services firm that formulates, blends, and sells oil and gas chemicals and provides technical support.
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