CHEMICALS USED IN WELL DRILLING, WELL PACKING, WELL TREATING, WELL WORKOVER, AND CHEMICALS USED IN PETROLEUM AND OTHER NATURAL RESOURCE PRODUCTION, SUCH CHEMICALS BEING IN THE NATURE OF THINNERS, CONDITIONERS, WATER-LOSS CONTROL AGENTS, CLAY EXTENDERS, SHALE CONTROL AGENTS, SURFACTANTS, DETERGENTS, EMULSIFIERS, DEFOAMERS, FLOCCULANTS, EMUSION BREAKERS, WAX DEPOSITION CONTROL AGENTS, CORROSION INHIBITORS, AND THE LIKE; ADDITIVES FOR WELL DRILLING FLUIDS IN THE NATURE OF CLAY WEIGHTING MATERIALS, LOST CIRCULATION CONTROL MATERIALS, AND THE LIKE

'addit':57 'agent':35,40,51 'breaker':47 'chemic':1,13,23 'circul':70 'clay':36,66 'condition':30 'control':34,39,50,71 'corros':52 'defoam':44 'deposit':49 'deterg':42 'drill':5,60 'emulsifi':43 'emus':46 'extend':37 'floccul':45 'fluid':61 'inhibitor':53 'like':56,75 'loss':33 'lost':69 'materi':68,72 'natur':19,27,64 'pack':7 'petroleum':16 'product':21 'resourc':20 'shale':38 'surfact':41 'thinner':29 'treat':9 'use':2,14 'water':32 'water-loss':31 'wax':48 'weight':67 'well':4,6,8,10,59 'workov':11

LUBRICANTS USED IN WELL DRILLING, WELL PACKING, WELL TREATING, WELL WORKOVER AND WELL PRODUCTION

'drill':5 'lubric':1 'pack':7 'product':14 'treat':9 'use':2 'well':4,6,8,10,13 'workov':11

BACTERICIDES USED IN WELL DRILLING, WELL PACKING, WELL TREATING, WELL WORKOVER AND WELL PRODUCTION

'bactericid':1 'drill':5 'pack':7 'product':14 'treat':9 'use':2 'well':4,6,8,10,13 'workov':11

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