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

Claim 17:
18. A method of treating a lost circulation zone of a wellbore, the method comprising:
injecting a host-guest lost circulation material (LCM) composition into the lost circulation zone, the LCM composition comprising:
an aqueous solution;
one or more linear polymer chains, the linear polymer chains comprising polydimethylsiloxanes (PDMS), polypropylene glycols (PPG), polyethylene glycols (PEG) with molecular weights greater than 2500 g/mol, or combinations thereof; and
one or more cyclic molecules comprising alpha, beta, or gamma cyclodextrins; and 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

allowing the LCM composition to plug the lost circulation zone, thereby preventing wellbore fluids from passing into the lost circulation zone, wherein the LCM composition does not comprise cement.