| abstract |
Portland cement slag LCM includes Portland cement slag to mitigate or prevent loss of circulation in a well. A Portland cement slag LCM may include Portland cement slag, Portland cement, a carrier fluid, and an inorganic consolidation activator. Another Portland cement slag LCM may include Portland cement slags and a crosslinked fluid, such as a calcium ion crosslinked polyuronide or a divinyl sulfone crosslinked polysaccharide. Yet another LCM of Portland cement slag may include Portland cement slags and polymeric fibers or particulate glass. The invention also relates to methods of regulating the loss of circulation using an LCM of Portland cement slag. |