Chemical additives for oil well drilling fluid; Chemicals used in oil drilling; Drilling muds for use in oil well drilling

Industrial Cleaning Compounds for Removing Oil and Grease

Clay and Hydrated Lime Used in the Drilling, Completion and Workover of a Subterranean Well

LIGNOSULFONATES AND MODIFIED LIGNOSULFONATES; CURING AGENTS FOR CEMENT; INORGANIC CHEMICALS-NAMELY, SALT, BARIUM CARBONATE, BICARBONATE OF SODA, CALCIUM CHLORIDE, CAUSTIC SODA, GYPSUM, SODA ASH, SODIUM BICHROMATE; DRILLING MUD ADDITIVES-NAMELY, WEIGHTING AGENTS, DEFLOCCULANTS, FLUID LOSS CONTROL AGENTS, EMULSIFIERS, DISPERSANTS, ANTI-FOAM AGENTS, THINNERS, ANTI-CORROSION AGENTS, SUSPENSION AGENTS; AND CHEMICAL ADDITIVES FOR TREATING DRILLING MUDS; REFINERY, DRILLING AND INDUSTRIAL CHEMICALS-N...

CONSULTING AND TECHNICAL ASSISTANCE IN THE TECHNOLOGY OF WELL DRILLING AND DRILLING FLUIDS

CHEMICALS AND CHEMICAL COMPOSITIONS-NAMELY, LIGNOSULFONATES AND MODIFIED LIGNOSULFONATES; CURING AGENTS FOR CEMENT; INORGANIC CHEMICALS, SALT, GRAPHITE, LIME, BARIUM CARBONATE, BICARBONATE OF SODA, CALCIUM CHLORIDE, CAUSTIC SODA, GYPSUM, SODA ASH, SODIUM BICHROMATE; DRILLING MUD ADDITIVES-NAMELY, WEIGHTING AGENTS, DEFLOCCULANTS, FLUID LOSS CONTROL AGENTS, EMULSIFIERS, DISPERSANTS, ANTI-FOAM AGENTS, INHIBITORS, ANTI-CORROSION AGENTS, SUSPENSION AGENTS, AND CHEMICAL ADDITIVES FOR TREATING DRILL...

CHEMICAL FOR WELL AND RELATED TUBING TO INHIBIT AND PROTECT AGAINST CORROSION DURING THE DRILLING, COMPLETION OR WORKOVER OF SUBTERRANEAN OIL OR GAS WELL

CHEMICALS AND CHEMICAL COMPOSITIONS-NAMELY, CORROSION CONTROL ADDITIVES FOR BRINE PACKER FLUIDS USED IN OIL AND GAS WELLS