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-NAMELY, DESALTING AGENTS, CORROSIONS INHIBITORS, ACID INHIBITORS, BIOCIDES, SOLVENTS, SURFACTANTS, SCALE INHIBITORS, FILM FORMING INHIBITORS, VAPOR PHASE INHIBITORS, FILM FORMING INHIBITORS, VAPOR PHASE INHIBITORS, DISPERSING AGENTS, DEFOAMERS, INHIBITORS FOR GUM AND PRECIPITATES, COLOR STABILIZERS, POLYGLYCOL DIBASIC ACID ESTERS, ETHOXYLATED AMINES; ADDITIVES FOR OIL WELL ACIDIZING ITORS, AN D DEMULISIFIERS