LINER HANGER Russian patent published in 2023 - IPC E21B33/14 E21B43/10 E21B17/02 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry, and in particular to devices for cementing a liner in an open and cased wellbore. The claimed liner hanger comprises a body with an upper part including a stuffing box with at least three gaskets and a hanging plug installed inside the lower part of the stuffing box on shear screws. The plug contains a passage channel, a landing seat for a plug dropped from the wellhead and a landing cone made on the lower part of the hanging plug for landing in the stop ring seat attached to the lower part of the body. In the upper part of the stuffing box above the gaskets, at least two power pins are made, located opposite each other, with a thickness that makes it possible to withstand at least the weight load of the liner lowered into the well, and the lower part of the body in the upper part is equipped with at least two through grooves with corresponding pockets with the possibility of connection to the power pins of the stuffing box.

EFFECT: creation of a reliable, unsophisticated and easy-to-use design that improves the efficiency of liner clamping by improving the quality of the cement lining by combining cementing operations and casing liner rotation, as well as guaranteed disconnection of the pipe string from the liner, regardless of its length and the complexity of the borehole profile.

1 cl, 3 dwg