WELL MAGNETIC INTROSCOPE Russian patent published in 2010 - IPC G01N27/82 G01V3/28 

FIELD: measuring equipment.

SUBSTANCE: invention is related to the field of control and instrumentation equipment and may be used in inspection of oil and gas well flow strings. Introscope consists of well module and surface diagnostic system. Well module comprises magnetisation device in the form of dumbbell-shaped magnetic conductor with magnetisation coil, the main scanning magnetic measuring system in the form of line from N magnetic sensitive sensors arranged on flexible "skis" between poles of magnetic conductor, board controller. Each of N magnetic sensitive sensors is connected to board controller via sealed slot and is attached on internal side of flexible ski equipped with stiffening rib. One or both ends of skis may move along internal surface of string. Magnetisation coil is poured with sealing compound and is placed into protective jacket. Magnetic conductor may be equipped with replaceable poles. Introscope may be equipped with additional scanning system, which is arranged in the form of line from M magnetic sensitive (vortex current) sensors, arranged on flexible "skis" equipped with permanent magnets of low capacity, which magnetise section of flow string, to the level that is less than value of technical saturation. Introscope may be equipped with gamma ray unit, gyroscope.

EFFECT: expansion of functional resources, increased sensitivity and validity.

10 cl, 7 dwg