DEVICE AND METHOD OF EXAMINATION OF HORIZONTAL OR INCLINED WELL Russian patent published in 2017 - IPC E21B47/01 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to equipment for investigation and completion of inclined and horizontal wells equipped with arrangements for performing multi-stage hydraulic fracturing of the formation. The device has a tubing string, a pumping unit, a packer, means for well measuring parameters and at least one sealing element contacting the casing string walls. An electric centrifugal pump unit of inverted type with telemetering system unit is used as a pumping unit. The telemetering system unit is lowered into the tubing string on load-carrying cable and placed in horizontal or inclined well under examination. A sealing element is installed outside the tubing string outside of electric centrifugal pump unit. The method includes preliminary running of tubing string into casing string with passage of horizontal or inclined well, lowering of electric centrifugal pump on load-carrying cable and placing of electric centrifugal pump inside the tubing string with the telemetering system unit connected thereto in examined area with subsequent step-by-stage movement thereof along the well, pumping of liquid with simultaneous measurement of parameters at each stage and processing the obtained results.

EFFECT: improved reliability and accuracy of measurement of flow parameters, pressure, temperature and water content providing possibility for examining long sections of horizontal wells.

4 cl, 2 dwg