DEVICE FOR SEPARATE PUMPING OF LIQUID INTO TWO FORMATIONS 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 pumping of liquid into two formations in one well. Device includes a housing with through and radial holes and a stop in the lower part, a cylindrical seat, a spring, a locking element dropped into the device during its operation. Cylindrical seat is installed opposite the radial holes of the housing, and between the cylindrical seat and the stop of the housing there is the spring. Sop of the housing is equipped with an internal annular recess. 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 housing at interaction of the external cylindrical protrusion of the stock with the top end face of the cylindrical seat, with subsequent limited axial movement downwards compressing the spring, the stock and the cylindrical seats to accommodate the split spring ring of the stock in the internal annular recess of the stop of the housing. 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 housing and the stock extraction from the device.

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

1 cl, 2 dwg