WELL COMPLETION METHOD Russian patent published in 2021 - IPC E21B33/13 

FIELD: mining industry.

SUBSTANCE: method for completion of wells is declared. The method includes opening the target formation and drilling a borehole in it, lowering the casing string, which includes devices for secondary opening of the formation, consisting of a housing with radial holes of the maximum structurally permissible area, plugs made of decomposable or soluble in a liquid medium material installed in the housing by means of a threaded connection, or pressing, which includes a device for collar cementing. The device consists of an activation coupling located in the lower part of the device, consisting of a column packer activated hydraulically, a cementing coupling, including, if necessary, pumping an alkali or acid solution into the area of the devices for secondary opening, dumping the ball, activating the casing packer, opening windows in the cementing coupling, cementing the borehole annulus to the required height with pressing the grouting solution and closing the cementing windows with a pressing plug. A stopper made of a decomposable or soluble material in a mineralized medium is installed inside the pressing plug. The method includes waiting for the decomposition or dissolution of the plugs in the devices for secondary opening and in the pressing plug, the formation of a hydrodynamic connection of the mouth with the target formation, receiving an influx of reservoir fluid, or pumping working agents into the formation.

EFFECT: reduction in the drilling time and the faster start of development.

1 cl, 5 dwg