ORGANOPHOSPHORUS CONTAINING COMPOSITES FOR USE IN WELL TREATMENT OPERATIONS Russian patent published in 2018 - IPC C09K8/80 C09K8/584 E21B43/22 E21B43/267 

FIELD: drilling soil or rock.

SUBSTANCE: invention relates to a composite material and a method for its use in well treatment operations. Said composite material for the treatment of wells includes an surface modifying treatment agent, covering, at least partially, a solid particle and containing a hydrophobic tail and an anchor for fixing the hydrophobic tail to the solid particle, where the anchor is a derivative of an organophosphorus acid and additionally, where at least one of the following conditions has priority value: (a) the hydrophobic tail contains a perforated group of a reduced structure, (b) the hydrophobic tail is a fluorine-containing residue, characterized by a reduced structure, (c) the surface modifying treatment agent is characterized by the formula or (g) the surface modifying treatment agent is selected from the listed group. Alternatively, the specified composite material includes a surface modifying treatment agent, covering, at least partially, a solid particle and containing a hydrophobic tail and anchor, and in addition, where (I) the anchor is a derivative of an organophosphorus acid, (II) at least part of the anchor is attached to at least part of the surface of the solid particle through the reactive region, (III) the hydrophobic tail is attached to the solid particle through the anchor. This method for treating a well passing through a subterranean formation includes pumping a composite material according to any one of the above options into the well, or forming a composite material in the well under in-situ conditions. Invention is developed in dependent items of the formula.

EFFECT: reducing the accumulation of fine-grained particles and dust, as well as the migration of sand during a hydraulic fracturing operation or a sand control operation, as well as an increase in the crush strength of solid particles.

36 cl, 3 ex, 1 tbl, 3 dwg