METHOD FOR INSTALLING BORDERING IN WELL Russian patent published in 2023 - IPC F42D1/08 F42D1/18 

FIELD: mining.

SUBSTANCE: drilling and blasting in rocks used in various industries that use blasting in rock masses, in particular in the development of minerals by surface mining. The method of installing a bordering in a well involves lowering a bordering made in the form of an inclined solid cylinder into the well to the depth of intense fracturing, the transverse ends of which are beveled parallel to each other, after which the bordering is secured to a support structure exceeding the diameter of the wellhead using a flexible connection. To install the bordering, a cavity is first created at a technologically specified depth from the wellhead by external influence on a section of the hole wall. A bordering is installed into the cavity, made in the form of an inclined solid cylinder with a height of 1.10–1.25 of the well diameter and a diameter of 0.7–0.9 of the well diameter, with parallel beveled transverse ends, which are obtained by excision of the upper and lower segments of a straight solid cylinder and form angles with its sides in the range of 50–70°. At the same time, the bordering is lowered using a flexible connection attached to it with the insertion of the pointed part of the beveled transverse end of the inclined solid cylinder into the formed cavity, after which the flexible connection is fixed on the supporting structure and inert material is placed on top of the bordering.

EFFECT: increase in the efficiency of hole completion, as well as an increase in the duration of action of gaseous detonation products on the fracture rock, and an increase in the efficiency of the explosion.

1 cl, 2 dwg