RETRIEVABLE PACKER Russian patent published in 2023 - IPC E21B33/12 E21B33/129 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry, and in particular to packers separating the downhole space. The retrievable packer includes connected upper and lower shafts, an upper anchor unit and at least one sealing cuff located below between the upper and lower stops. The lower stop is rigidly connected to the lower wellbore, and the anchor unit is made of paired rams pressed inward, located evenly along the perimeter of the upper wellbore in the windows of the hollow cylindrical casing between the upper and lower cones tapering towards each other, made with the possibility of moving towards each other when the packer is installed. The upper barrel is telescopically put on the lower barrel with the possibility of moving upwards, limited by the stopper, after disconnecting the connection of the barrels at a load predetermined empirically. The upper barrel is equipped with annular or threaded outer grooves from below. The lower cone is made integral along the perimeter and is rigidly connected to the upper stop of the sealing collar with the possibility of sliding along the shafts, and the upper cone is mounted with the possibility of moving relative to the upper shaft towards the lower cone with the paired rams moving apart due to at least one spring ring installed in the corresponding internal selection, which interacts with annular or threaded outer grooves of this barrel with fixation in the lower - working - position. The casing is located outside of both cones inserted with the possibility of longitudinal movement limited by the protrusions relative to the casing towards each other and fixed relative to the casing by shear screws in the unclenched - transport - state. The lower stop is rigidly connected to the bottom of the lower barrel, equipped from below with an internal groove for the shear ring, pressed to the groove along the outer part of the ring with a threaded plug and connected through an adapter along the inner part of the ring with a rod connected to the piston rod of the setting tool. The upper cone is made with the possibility of interaction from above with the cylinder of the landing tool.

EFFECT: proposed retrievable packer is simple and reliable, allows to install the packer at any depth of the well with any inclination of the wellbore thanks to the hydraulic setting tool and a small number of easy-to-manufacture parts.

3 cl, 1 dwg