CURABLE COMPOSITION FOR USE AS MATERIAL TO PREVENT LOSSES Russian patent published in 2016 - IPC C09K8/35 

FIELD: mining.

SUBSTANCE: present invention relates to methods of reducing loss of drilling fluid and other liquids for underground repair of wells in underground formation during drilling or construction of drilling wells in specified formation. Method includes supply into well of curable composition containing organic substance, capable to be subjected to free-radical (co)polymerization of described by the following formula: , where x is an integer from 1 to 8; Fp - derivative of vinyl ether, vinyl ester, allyl ether, allyl alcohol ester, vinylketone, styrene, α-methylstyrene, vinylamide, allilamide, acrylamide, maleate, fumarate or (meth)acrylate; L - organic group containing (substituted) aromatic or (substituted) aliphatic group containing one or more O, N, S or combinations thereof; and Q meets substituted or non-substituted one- or multivalent organic radical, derivative of polyalkyleneoxidepolyol, polyalkyleneoxide with amine terminal group, polyolefin with hydroxyl terminal group, polyolefin with amine terminal group, silicarbinol, (co)polystyrene polymer or mixtures thereof. Second stage consists in curing mentioned composition in the well in situ.

EFFECT: technical result consists in obtaining curable composition which can be subjected to free-radical polymerization in situ with formation of material to prevent losses.

11 cl, 6 dwg, 1 tbl