FIELD: oil and gas industry.
SUBSTANCE: method consists in emission of sounding pulses by means of a generator solenoid located inside tested pipes, the axis of which coincides with axis of the tested pipes, and measurement of EMF induced in receiving coils by means of an electromagnetic field decrease process. Magnetic flux is measured, which is caused by sounding pulses of the generator solenoid, by means of sensors located along the instrument perimetre at distance r from the probe axis, opposite the end face of the generator solenoid, in N sectors on radial direction.
EFFECT: enlarging application area and improving quality of pipe flaw detection.
10 dwg
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