BENTONITE [ AND SALT CLAY; BARITE; MINERAL LIGNITE; CANE FIBERS; FLAX STRAW; MICA; WALNUT SHELLS; AND WOOD FIBERS, ALL FOR USE IN THE COMPOUNDING AND TREATMENT OF OIL-WELL DRILLING MUD ]

CAUSTIC SODA; CARBOXYMETHYLCELLULOSE; BLENDED LIGNOSULFONATE; AND PARAFORMALDEHYDE, THINNERS AND THE LIKE, ALL FOR USE IN THE COMPOUNDING AND TREATMENT OF OIL-WELL DRILLING MUD