DEVICE FOR CREATING AN AXIAL FORCE ON A CHISEL WHEN DRILLING HORIZONTAL WELLS Russian patent published in 2022 - IPC E21B23/04 E21B7/08 E21B19/87 

FIELD: mining industry.

SUBSTANCE: device is claimed to create an axial force on a chisel when drilling horizontal wells. The device includes a cylindrical body and rollers spring-loaded to the walls of the well. The rollers are located at a certain distance from each other. The rollers are pushed out due to the passage of the washing liquid flow. The rollers are made with the possibility of fixing in the walls of the well and with the possibility of pushing the drilling tool. The housing inside is equipped with a coaxial cup with an impeller, made with the possibility of giving rotation under the action of a fluid flow and equipped with a rod with a worm screw at the end. Each roller contains a number of gears mounted on it, transmitting rotation to each other. The extreme gear has an axis of rotation, relative to which the roller is rotatable, thereby moving out of the housing, pressing against the walls of the well to create an axial force. The extreme gear is made with the possibility of interacting with a worm screw at the end of the rod, forming a worm gear. The lever is fixed at one end on the extreme gear, and the other end of the lever is equipped with an axis of rotation located on the bushing mounted coaxially with the rod. The lever is spring-loaded outward with the possibility of extending the roller relative to the housing.

EFFECT: creation of a device for providing an axial force on a chisel when drilling horizontal wells, which makes it possible to expand the functionality when drilling extended horizontal wells.

1 cl, 3 dwg