FIELD: oil-and-gas industry.
SUBSTANCE: device comprises the going-in string of hollow sealed pipes and logging instrument for well survey. Flow string used as said going-in string of hollow sealed pipes has bottom end with openings to accommodate blown valves while inner circular groove is made under holes in said flow string to receive split lock ring. Note here that hydraulic standoff device is arranged at bottom end of said flow string for it to get into open well of multihole horizontal well. Besides, this device is equipped with squeezing plug to slide over flow string, driven by fluid overpressure to destruct blown valves for opening of holes in flow string and locking by lock ring in said string under said holes. Logging instrument is lowered into flow string by stiff cable against the stop to squeezing plug.
EFFECT: reliable operation, accurate determination of watered interval.
3 dwg
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