DOWNHOLE HYDROMECHANICAL PACKER Russian patent published in 2021 - IPC E21B33/12 

FIELD: oil and gas industry industry.

SUBSTANCE: invention relates to equipment for the oil and gas industry and can be used for hermetic separation of the intervals of the well casing during technological operations. The downhole hydromechanical packer includes functionally separate units installed on the hollow rod in the direction from top to bottom: a bypass unit consisting of an installation sub fixed on the hollow rod, to which a bypass sleeve is attached, a seal, a bypass plunger located inside the body of the release valve; hydro-anchor unit; sealing unit, consisting of sealing elements with rings; landing assembly, consisting of a cone and a collet, installed with the ability to hold the hollow rod in the transport position and installed below the mechanical anchor. Technological holes are made in the cone, equipped with a filtration spring with a protective sleeve installed above it. A cylinder is attached to the body of the mechanical armature from below, to the bottom of which a cap is attached, inside which a lock is installed. The end part of the retainer is permanently placed in the shaped groove of an independent sleeve mounted on the lower part of the hollow rod with the possibility of free rotation and movement inside the cap. The seal is located in the space formed between the lower end of the positioning sub, the outer surface of the hollow stem and the inner surface of the bypass sleeve connected to the positioning sub.

EFFECT: invention increases operational reliability of the downhole hydromechanical packer.

2 cl, 1 dwg