73243477
Dec 19, 1979
Dec 29, 1981
CHEMICALS FOR THE OIL AND GAS WELL INDUSTRY-NAMELY, THIXOTHROPIC AND NON-THIXOTHROPIC DRILLING, WORKOVER AND COMPLETION FLUIDS, FLOW LOSS CONTROL AGENTS, LOSS CIRCULATION AGENTS, DEFOAMERS, CORROSION INHIBITOR-BIOCIDES, NON-FLUORESCING AGENTS, PACKET FLUIDS, VISCOSIFIERS, WEIGHTING MATERIALS AND MUD LUBRICANTS
Chemicals