Patent ID: 11891565
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  E | IPC C  E

Claim 15:
16. A method of making a host-guest lost circulation material (LCM) composition for sealing lost circulation zones in wellbores, the method comprising:
adding one or more cyclic molecules to an aqueous solution, the cyclic molecules comprising alpha cyclodextrins, beta cyclodextrins, gamma cyclodextrins, or combinations thereof;
adding one or more linear polymer chains to the aqueous solution, the linear polymer chains comprising polyethylene glycols (PEG) with molecular weights greater than 2500 g/mol, polypropylene glycols (PPG), polydimethylsiloxanes (PDMS), or combinations thereof; and
agitating the aqueous solution until the aqueous solution is observed to turn opaque, wherein the one or more cyclic molecules form a host-guest structure around the one or more linear polymer chains utilizing van der Waals forces, and wherein the LCM composition does not comprise cement.