U.S. federal trademark · Serial No. 97828385 · Reg. No. 7581545
chemicals used in oil drilling, drilling muds; chemical additives for drilling muds, oil well drilling fluids, oil drilling fluid lighteners, and oil drilling foam; Chemical drilling fluids for use in subterranean wells, namely, drilling muds, oil drilling chemicals in the nature of completion fluids, oil drilling chemicals in the nature of workover fluids and oil drilling chemicals in the nature of wellbore fluids; chemical additives for use with drilling fluids; drilling muds and chemicals in the nature of drilling fluids for use in oil well drilling; chemicals used in oil well drilling; chemicals for enhancing and stimulating oil recovery from wells; chemicals for fracturing subsurface earth formations
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