DRILLING EXPLORATION WELLS PRODUCTION & PROCESSING CHEMICALS:CORROSION INHIBITORS OXYGEN SCAVENGER MICROBIOCIDES ANTIFOAMS DEMULSIFIERS SCALE INHIBITOR RIG WASH/DEGREASER DRILLING FLUID ADDETIVES:EMOLSIFIERS VISCOSIFIER FLUID LOSS ADDETIVES DRILLING MUD EMULSIFIER FOAMING AGENT CORROSION INHIBITOR MUD LUBRICANT DRILLING DETERGENTS SULFIDE SCAVENGER OXYGEN SCAVENGER MICROBIOCIDE CONDITIONER/WETTING AGENT ANTIFOAMS ACIDIZING CHEMICALS:CORROSION INHIBITOR MULTIFUNCTIONAL ADDETIVES ANTI SLUDGE IRON REDUCER CHELATING AGENT OIL-EXTERNAL EMULSIFIER FLUID RECOVERY ADDETIVES NON-EMULSIFIER MUTUAL SOLVENT HYDROGEN SULFIDE SCAVENGER DIVERTING AGENT FRICTION REDUCING AGENT CEMENTING ADDETIVES:RETARDER DISPERSANTS FLUID LOSS ADDETIVES SPACERS DEFOAMERS SPECIALTY CEMENTING ADDETIVES