EMI / MFL
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EMI inspection method is an NDT application applied to tubular products such as tubing and drill pipe. It involves full length scanning of tubes using a coil to induce longitudinal field with a buggy type unit to detect transverse flaws in the material, which includes flaws such as fatigue cracks, corrosion, pits, cuts, gouges, and other damage that exceed the specified acceptance limits. If flaws are present, the induced field will create flux leakage at the point of flaw. The leakage is detected by hall effect probes on the buggy witch transmits a signal to a computer console. The signal is then evaluated by a trained inspector. 
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VEDAQ 2000The VEDAQ 2000-C™ is a portable, computerized, multi-function EMI system for inspecting drill pipe and tubing. Transverse flaw detection and TRUEWALL™ solid state (Hall effect) wall monitoring functions are standard on the VEDAQ 2000-C™. It's lightweight, compact and extremely portable design allows the VEDAQ 2000-C™ to be operated at the rig site or in a pipe yard. Commands (i.e. gain, coil, buggy adjustments) are controlled on the computer. The inspection results are displayed digitally in the software with individual channel colors for easy interpretation. The VEDAQ 2000-C™ is designed to meet most industry requirements set forth by API, DS-1, etc.
http://www.newtechsystems.com/vedaq_2000.htm |