FIELD: oil producing industry; may be used in completion of oil wells by swabbing and for investigation of unsteady-state processes in formations during well shut-in and renewal of well operation. SUBSTANCE: device is made in the form of downhole instrument having swab and measuring module. Swab has base of several interconnected rod mandrels with longitudinal channels-grooves on generating lines. Installed above each rod mandrel for moving up and down to stop is set of collars. Located above collars are protective wire scrapers. Measuring module includes two pressure pickups, cable tension transducer and mechanical amplifier electrically connected with them. One of pressure pickups is located for measuring of pressure of fluid filling the well above swab, while the other pressure pickup is installed under swab. Cable tension transducer connects swab with cable lug and is the main load-carrying member of swab suspension. EFFECT: higher efficiency and operating reliability of device in investigation of unsteady-state processes in formation and continuous control of cable tension, and simplified design of device. 4 dwg
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