METHOD FOR CARRYING OUT REPAIR AND INSULATION WORK IN THE WELL Russian patent published in 2022 - IPC E21B33/138 E21B43/32 C09K8/504 

FIELD: repair and insulation works.

SUBSTANCE: invention relates to a method for carrying out repair and insulation work in a well. The method for carrying out repair and isolation work in a well includes preparing and pumping the first composition into the well, and then the second composition in a given volume. The well is kept at rest. As the first composition, an adhesive composition is used, which is pumped into the annular space of the well and which consists of acetone and an additive. As the second composition, an insulating composition is used, consisting of a liquid synthetic resin and a liquid hardener. The insulating composition is pumped into the annulus of the well. After injection of the second composition, the well is kept at rest. The additive is a surfactant. Liquid hardener is a mixture of diethyltoluenediamine, polyethylenepolyamine and benzylamine. The liquid synthetic resin is an epoxy resin or synthetic resin. The specified volume of the insulating composition is determined based on the internal volume of the surface piping, the volume of the annulus in the well, as well as the height of the cement stone in the annulus and the injectivity of the cement stone in the annulus.

EFFECT: improving the efficiency of well sealing.

6 cl