U.S. federal trademark · Serial No. 75547341 · Reg. No. 2401056
WELL ADDITIVE MATERIALS, NAMELY, EXPANDED CLAY AND SHALE AGGREGATES AS ADDITIVES IN DRILLING FLUIDS AND CEMENTING SLURRIES TO PREVENT LOSS OF CIRCULATION IN A WELL AND TO ENHANCE THE COMPRESSIVE FLEXURAL AND TENSILE STRENGTH OF CEMENT SHEATHS
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