CPC C09K 8/44 (2013.01) [C09K 8/035 (2013.01); C09K 8/426 (2013.01); C09K 8/487 (2013.01); E21B 21/003 (2013.01)] | 20 Claims |
1. A host-guest lost circulation material (LCM) composition for sealing lost circulation zones in wellbores, the LCM composition comprising:
an aqueous solution;
one or more linear polymer chains, 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
one or more cyclic molecules comprising alpha cyclodextrin, beta cyclodextrin, gamma cyclodextrin, or combinations thereof, 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, wherein the LCM composition does not comprise cement.
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