OIL-FIELD DEVICE, OIL-FIELD ELEMENT OF SAID DEVICE, HAVING FUNCTIONALISED GRAPHENE PLATES, METHOD OF CONDUCTING OIL-FIELD OPERATION AND METHOD OF MODIFYING FUNCTIONALISED GRAPHENE PLATES Russian patent published in 2013 - IPC C08K3/04 E21B43/00 B82B1/00 

FIELD: chemistry.

SUBSTANCE: invention relates to an oil-field device which is a downhole tool and has an oil-field element, such an oil-field element, a method of conducting an oil-field operation and a method of modifying functionalised graphene plates. The oil-field device is a downhole tool and has an oil-field element made from a composite which contains a matrix material which contains a polymer, an elastomer or ceramic material, and a plurality of functionalised graphene plates which are dispersed in the matrix material and contain single-layer sheets and multiple-layer sheets, having surface area per unit mass of at least 300 m²/g. The method of conducting an oil-field operation involves selecting an oil-field device which is a downhole tool and has an oil-field element, at least part of which is made from said composite and using the oil-field device in the oil-field operation, as a result of which the oil-field element is exposed to the downhole conditions. The method of modifying functionalised graphene plates involves obtaining functionalised graphene plates and atom-transfer radical polymerisation thereof in order to bind the polymer to the surface of said plates.

EFFECT: obtaining polymer composites with good barrier and mechanical properties and making oil-field elements therefrom, having semiconductor and impermeable insulation on wires, cables and other electrical and electronic components.

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