Bentonite (Halliburton Gel) agent Halliburton
Bentonite (Halliburton Gel) is a colloidal clay mineral composed primarily of smectite. It may also contain accessory minerals, such as quartz, feldspar, and calcite. In fresh water, bentonite swells to approximately 10 times its original volume. Bentonite is used in most cement slurries for decreasing slurry weight and increasing slurry volume.