PACKER-ANCHOR HYDROMECHANICAL RETRIEVABLE Russian patent published in 2023 - IPC E21B23/03 E21B33/1295 

FIELD: installation equipment fixing devices.

SUBSTANCE: device is claimed for fixing the installation equipment in the well casing string. The device comprises an anchor body with a shank configured to be connected to the packer and having radial holes for hydraulic communication of the tubular space with the hydrochamber cavity. In the cavity of the hydrochamber there is a piston having on the inside a helical thrust engagement with the mating helical surface of the collet and an outer protrusion for transferring the power load to the armature casing. Anchor dies are movably mounted in the conical part of the anchor body in dovetail grooves. The device contains a mounting sleeve, which has a mutual thrust helical engagement of the working surfaces with the collet. The mounting sleeve is located on the armature shank, connected to the lower part of the armature body by means of a thread, and is fixed to the shank body by means of shear screws of a larger outer diameter compared to the shear screws for fixing the piston. On the outer surface of the mounting sleeve, a screw thrust thread is made for non-rigid engagement with the mating inner surface of the collet. The thread profile has an inclined surface from above to ensure the sliding of teeth during movement and a thrust surface from below to ensure locking. The collet body is made of a split sleeve with the possibility of elastic radial expansion or compression under the action of dynamic loads.

EFFECT: increasing the functionality and reliability of the equipment.

1 cl, 4 dwg