GUIDE SHOE FOR INSTALLATION OF SHAPED SHUTTER IN WELL Russian patent published in 2020 - IPC E21B29/10 E21B17/14 

FIELD: oil, gas and coke-chemical industries.

SUBSTANCE: invention relates to oil and gas industry, in particular to devices for installation of shaped shutters at their isolation of zones of complications during drilling of horizontal wells or attachment of side shafts of multi-barrel wells. Guide shoe for installation of shaped shutter in well includes cylindrical part and guiding part with skew cut, connected to each other by hinged joint, allowing limited deflection of guide part relative to cylindrical part, lateral hole with nozzle for passage of liquid on side of cut and seat installed in cylindrical part, above hinged joint. Guide part with oblique cut is equipped with hole with nozzle made longitudinally to axis of guide shoe, extending to oblique cut of smaller diameter than diameter of side hole. Cylindrical part is equipped with a valve made in the form of a bushing with an upper blind axial channel and radial channels interconnected with the axial channel, which communicate space of the guide shoe above and under the bushing. Bushing is fixed with shear elements in the upper position above the seat and is made with possibility of limited movement downwards after destruction of the shear elements with tight covering of the cavity of the cylindrical part at interaction with the seat and fixation by the locking mechanism in the lower position. Locking mechanism is made in form of spring ring inserted into annular recess outside of sleeve and made with possibility of interaction with internal annular groove inside cylindrical part in lower position of sleeve. At that, cylindrical and guide parts are connected by semi-axles, and inner cavity is sealed by elastic sleeve fixed tightly in cylindrical and guiding parts with cone bushes. Guide shoe is equipped from above with a head for a fishing tool and flow holes, as well as upper end ledges for turning.

EFFECT: technical result is reduction of number of emergency situations.

1 cl, 5 dwg