DEPLETED WELL OPERATION PLANT Russian patent published in 2017 - IPC E21B43/00 F04F5/54 

FIELD: oil and gas industry.

SUBSTANCE: depleted well operation plant contains two pumps. One of these pumps is installed on the surface and made with the possibility of using the working fluid from the reservoir pressure maintenance system and delivery of the noted liquid through pump-compressor pipes. The second pump is jet. It is installed in a borehole at the calculated depth and provides for the use of single or double production strings of lifting pipes. Jet pump has a fishneck and a pinned underneath it autonomous geophysical device. This device is designed to monitor the operation of the jet pump and the reservoir characteristics. There is a possibility to lower the geophysical device into the well with the nearing to the reservoir and removal from the well together with the jet pump with the help of a mounting tool and a rope or an rising flow of working fluid. The nozzle device for the jet pump has a channel for sampling reservoir fluid during evacuation by a jet pump, an opening for the outlet of a mixture of working and reservoir fluids, so that they can be lifted along the production string annular space. A non-return valve for separation of the reservoir and working fluid and a packer-anchoring equipment or a sealing device are installed under the jet pump.

EFFECT: increased processibility of well operation.

2 cl, 4 dwg