Patent ID: 11933119
Assignee: HALLIBURTON ENERGY SERVICES, INC.
Field: Civil engineering (Other fields)
Classification: CPC E  C | IPC C  E

Claim 11:
12. A method comprising:
introducing a metal salt and a metal oxide into a portion of an oil-based drilling fluid, wherein a weight ratio of the metal salt to metal oxide in the portion of oil-based drilling fluid is in a range from about 1:1 to about 1:4, and wherein the oil-based drilling fluid comprises an invert emulsion;
mixing and shearing the portion of the oil-based drilling fluid containing the metal salt and the metal oxide at a surface location to form a chemical sealing pill;
after mixing and shearing, introducing the chemical sealing pill into a lost circulation zone as a single mixture, wherein the chemical sealing pill comprises oil-based drilling fluid, the metal salt, and the metal oxide;
allowing the portion of the oil-based drilling fluid to at least partially set in the lost circulation zone to form a set plug, wherein the set plug seals the lost circulation zone and reduces loss of fluid into the lost circulation zone from subsequently introduced fluids; and
preventing loss of fluid into the lost circulation zone from subsequently introduced fluids with the set plug.