SYSTEM AND METHOD OF SECURING PIPE STRING IN WELL Russian patent published in 2024 - IPC E21B23/06 E21B33/1295 E21B43/10 

FIELD: mining.

SUBSTANCE: group of inventions relates to a system for suspension of a casing string-liner in a well, to a system for suspension of a pipe string in a well and to a method of fixing a pipe string in a well. System for suspension of a casing string-liner in a well contains: casing hanger disposed along the working string, wherein said hanger has a plurality of hanger wedges in working interaction with the hanger cone, wherein said plurality of hanger wedges and hanger cone are arranged on the mandrel; packer with packer sealing element and packer cone arranged with possibility of packer sealing element expansion, at that packer sealing element and packer cone are located on mandrel. To allow expansion, the packer cone is pushed through the packer sealing element, causing the packer sealing element to move radially outward. Besides, the system for suspension of a casing string-liner in a well contains: a drive system having an actuator arranged along the mandrel, the actuator being configured to respond to hydraulic pressure to initiate the installation of a plurality of suspension wedges, wherein the drive system further comprises seals arranged to provide a seal between the mandrel and the surrounding pipe, wherein said mandrel is portless on the deep side of the seals to prevent leakage paths; and a mechanism for protection against premature installation, located along the mandrel, to prevent premature displacement of the actuator and thus to prevent premature installation of a plurality of suspension wedges.

EFFECT: facilitating the use of the suspended device of the pipe string in the well, in excluding formation of leak paths.

15 cl, 5 dwg