SCANNING MAGNETIC INTROSCOPE FOR NON-DESTRUCTIVE EXAMINATION OF STEEL CASING STRINGS OF WELLS Russian patent published in 2013 - IPC G01N27/82 

FIELD: oil and gas industry.

SUBSTANCE: device consists of well module containing magnetiser, magnet-measuring system from N magnet-sensitive sensors and onboard controller, ground electronic unit that includes power source, ground controller and system for determining the depth of well device, personal computer and geophysical cable connected in such a way that well module is connected via geophysical cable to ground electronic unit and personal computer interconnected via standard interface, each of N information inputs of onboard controller is connected to the output of one of N magnet-sensitive sensors. Note that the output of power source is connected to the inputs of magnetiser and each of N magnet-sensitive sensors, also to the first input of onboard controller, the first output of which is connected to the first input of ground controller connected by the second input to the output of the system for determining the depth of well device and by the output - to personal computer. Well module includes onboard time setting and storage devices and ground electronic unit consists of ground onboard time setting and storage devices, note that the second input of onboard and the third input of ground controllers are connected to the outputs of onboard and ground time setting devices correspondingly, the third input of onboard controller is connected to the output of onboard storage device, the input of which is connected to its second output, and the forth input of ground controller is connected to the output of ground storage device, the input of which is connected to its second output. Magnetiser is made composed of magnetic conductor from steel core with one or several inserts from constant magnets mounted regarding the connection of neighbouring inserts by positive poles to negative ones.

EFFECT: increase of efficiency and reliability, extension of functional capabilities.

12 cl, 6 dwg