DEVICE FOR COMPLETION, TREATMENT AND EXPLORATION OF WELLS Russian patent published in 2008 - IPC E21B43/25 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry. The device for completion, treatment and exploration of wells includes a case connected with a pipe column, at that the case is equipped with radial channels, a packer, a jet pump, at least one circulation channel, at least one elongated channel, and sealing components for pressurising a gate. The lower section of the elongated channel is tied to a subpacker surface of the well. A differential gate with an axial channel and radial windows is installed in the case in the circulation channel; the said gate is designed to move axially. The device contains back valves. One valve is installed in the active medium supply channel of the jet pump connected via one of the radial channel of the case with the annular space. Another valve is located in the upper section of the elongated channel connected to the inlet into a mixing chamber of the jet pump. The space of the elongated channel below the point of the back valve installation is connected via the second radial channel with the circulation channel at the extreme low position of the differential gate through the axial channel and radial windows, located in the upper section of the gate. The said space is connected via the third radial channel with the circular cavity of the circulation channel, limited with a big step of the differential gate located in its lower section. The fourth radial channel connects the annular space with the cavity of the circulation channel, limited with the lower surface of the gate. At that sealing components located out the gate are installed within the run of the sealed surface of the gate.

EFFECT: upgraded reliability of operation of the device for completion and treatment of wells, simplification of the design and enhancement of capabilities.

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