SLOT ON THE PACKER SHAFT OF THE AXIAL INSTALLATION, WHICH DETERMINES THE POSITION OF ITS MECHANICAL ANCHOR Russian patent published in 2019 - IPC E21B23/06 E21B33/12 

FIELD: mining.

SUBSTANCE: invention relates to groove of packer shaft. Groove is made on external surface of the packer shaft, it is intended for switching of the mechanical anchor of the packer with the axial installation from the lowering or lifting position to the packer installation position and back. Slot is formed by straight channel going from initial point from top to bottom, in lower point of which starts screw channel with left stroke going downwards. At the lower point of the channel, a straight channel starts upward, at the upper point of which a screw channel with a right-hand stroke starts, which goes upwards. From the upper point of the channel going upwards, two straight channels come out, the first one goes up, the second one goes down. Upper point of the upwardly moving channel is located above any point of the slot, and in the lower point of the downward flowing, a right-hand screw channel starts, which goes downwards and ends with a lower point which is located below any point of the slot and in which a straight channel goes upwards. At the upper point of the channel going upwards, a screw channel with a left stroke, which is going upwards, starts at the upper point of which a straight channel starts, which goes up, at the upper point of which a screw channel with the right stroke starts, which goes upwards, ends at the initial point and the closing slot. Channels do not intersect and overlap each other.

EFFECT: technical result is providing simplicity and uninterrupted downhill, installation and lifting of packer.

6 cl, 7 dwg