DEVICE FOR DEPOSITS ISOLATION IN WELL Russian patent published in 2015 - IPC E21B33/14 

FIELD: oil and gas industry.

SUBSTANCE: device includes hollow casing with at least one top radial hole, at least one bottom radial hole, at least one outside longitudinal groove. The top radial hole is closed by the shear pin. The bottom radial hole is closed by ring spring-loaded sleeve with internal ring groove. From outside the casing there is enclosure creating with the casing the ring chamber. The device contains position switch with profiled groove, in which part of the hollow shear shift is inserted outside the casing. In the device bottom below the profiled groove of the casing the parker is installed. The ring sleeve ands position switch of the device are linked with each other using movable joint and are installed in the ring chamber with possibility of movement upon hydraulic connection of the casing cavity and profiled groove as per the switch code. One of these codes contains such device position when the casing cavity is hydraulically connected with the parker cavity via the bottom casing holes, internal ring groove of the ring sleeve and outside longitudinal casing groove.

EFFECT: increased reliability of device operation and extension of the scope of application.

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