DEVICE FOR SEPARATE TREATMENT OF RESERVOIRS IN WELL Russian patent published in 2016 - IPC E21B34/14 E21B43/14 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry and can be used for separate treatment of reservoirs in a well, including the one during interval hydraulic fracturing. Device includes a packer, a disconnector including a barrel with radial channels, a slide valve arranged in the barrel opposite to the radial channels of the barrel and fixed by a shear element, a support ring mounted inside the barrel, a slide valve seat for a locking element dropped into the device during its operation. Slide valve is spring-loaded downwards from the support ring of the barrel. Herewith the support ring is equipped with an internal circular recess, and the locking element is made in the form of a stock equipped with an external cylindrical protrusion whereon there is a centralizer-seal. At the bottom stock is equipped with an outer annular groove to receive a split spring retaining ring. Herewith the stock has the possibility of rigid fixation relative to the barrel in the support ring at interaction of the external cylindrical protrusion of the stock with the seat of the slide valve with subsequent limited axial movement of the stock and the slide valve downwards compressing the spring to place the split spring ring of the stock in the internal annular recess of the support ring of the barrel. Herewith on top the stock is equipped with a head for the stock to be gripped by a fishing tool lowered into the well on a cable for release of the stock in the internal annular recess of the support ring of the barrel and extraction of the stock from the device.

EFFECT: technical result is to increase the reliability of the device.

1 cl, 2 dwg