chemical additives for cements, spacer fluids, and other fluids used in cementing operations in oil, gas, and other wellbores penetrating subterranean formations

cementing systems comprised of slurries comprising cement used for cementing operations; acidizing systems comprised of fluids comprising acid used in acidizing operations; and resin systems comprised of slurries comprising settable resins used in repair operations; all for use in operations in oil, gas, and other wellbores penetrating subterranean formations

construction and repair of oil and gas wells; cementing oil and gas wells; plugging oil and gas wells by providing a seal shutting off the well

stimulating oil and gas wells by acid stimulation