FIELD: oil producing industry. SUBSTANCE: pumping unit is designed for acting onto stratum by building differential pressure. Pumping unit contains tubing, packer and jet device. Active medium delivery chamber of jet device is provided with ball-type check valve to deliver active medium from annulus, and active medium and passive medium outlet chamber is furnished with check valve to pass active and passive media into tubing. Active medium delivery chamber of jet device is furnished with at least two check valves, for instance, ball-type valves, one of which serves for delivery of active medium from tubing at straight circulation, and active and passive media outlet chamber is furnished with at least two check valves, for instance, ball-type valves, one of which serves to pass mixture of active and passive media into annulus at straight circulation. EFFECT: improved reliability, simplified design. 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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