In oil-well drilling muds

The application of lignosulfonate-chromium derivatives in oil well drilling mud has already been mentioned as a typical example of the above effects in combination with crosslinking. The use of lignosulfonates as active extenders in concretes is a further example of the applicability of the above effects (61). Another is the use of lignins as extenders for asphalt cement (70). 

Dry ground mica concentrate is processed into usable products hy several dillerent grinding methods. Relatively coarse particle sizes (1.651-0.147 mm (10-100 mesh)) are used in oil-well drilling muds. 

Production, Import/Export, Use, and Disposal. Because barium compounds occur naturally and are widely used in oil well drilling muds, in steel, rubber and plastic products, glass and ceramics, chemical, and pyrotechnics industries, in insecticides, and as a smoke suppressant in diesel fuels (Bodek et al. 1988 EPA 1982 ILO 1983 Kirkpatrick 1985 Meister 1989 Stokinger 1981 ... 

Attempts have been made to use dextran and various derivatives in many additional ways these include the use of sulfated dextran as a synthetic analog of heparin and of dextran in oil-well drilling muds. ... 

Nonfood Uses. Native com starch is principally used in nonfood appHcations in mining, adhesives, and paper industries. Pregelatinized starch is chemically unmodified, but it is physically modified. Pregelatinized starches are used to decrease water losses in oil-well drilling muds, in cold water-dispersable wallpaper pastes, and in papemiaking as an internal fiber adhesive. 

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