LOCK AND PARTS OF LOCK FOR COMPONENTS OF DRILL STRING AND COMPONENTS Russian patent published in 2019 - IPC E21B17/43 E21B17/46 E21B19/16 

FIELD: mining.

SUBSTANCE: group of inventions relates to drill strings for impact drilling. Lock for connection of drill string components for percussive rotary drilling includes insert part and female part having encountered impact surfaces. Each component of the drill string extends along the axial direction. Plug-in part has first torque transmission means for rotation and first axial connection means. Female part has second means of transmitting torque for rotation and second axial connecting means. At that, the first and the second torque transfer device for rotation pass on the corresponding plug-in and female parts, and the first and second axial connecting means are positioned so that when the drill string is subjected to rotation torque for drilling, relative axial movement between the insert part and female part, which are in a state of connection to each other with interaction between first and second means of transmitting torque for rotation. Besides, the first and the second torque transfer device for rotation are jointing splines.

EFFECT: technical result is increased operational life.

27 cl, 28 dwg