CORROSION LOGGING

EMDS. MULTI-STRING CORROSION TOOL

Pulsed electromagnetic defectoscope is designed to measure the individual wall thickness of concentric pipes in a single run that makes it the most cost efficient corrosion evaluation tool in the market. The tool provides quantitative wall thickness measurement for up to 4 pipes and makes it possible to conduct thru-tubing corrosion survey in both single and double completions. EMDS combines two generating (receiving)coils, transversal coils for detection of minor radial defects, temperature, pressure, and gamma ray sensors. The pulsed electromagnetic method and unique coil design allows using the same coils in both generating and receiving modes. The tool’s high resolution and sensitivity are achieved through a large dataset. On a basis of a large dataset, the complex calculation algorithm and sophisticated data processing software provide the calculation of individual pipe thickness with a relatively high precision. The tool is compatible with all logging systems and is run a surface readout mode.

APPLICATIONS

  • Quantitative 4 pipes corrosion evaluation
  • Allocation of holes, cracks and parted casings
  • Applicable for single and dual completions
  • Allocation of completion elements and perforations
  • Corrosion monitoring

EM SCANNER. SCANNING ELECTROMAGNETIC DEFECTOSCOPE

Industry’s rising concerns over the use of multifinger caliper and challenges associated with precise allocation of metal elements behind production tubing initiated the development of a tool which combines pulsed electromagnetic defectoscope and electromagnetic imaging tool for detailed allocation of corroded areas in the first pipe. EMDS 2C scanner works on a pulsed electromagnetic principle that is also applicable for allocation of metal elements, such as control lines or cable clamps behind the first pipe. The effect is achieved via 10 short electromagnetic sondes located in the bottom section of the tool, whereas the upper section represents the conventional pulsed electromagnetic defectoscope for corrosion assessment of the outer barriers. Additionally, the electromagnetic scanner includes an inclinometer for precise tool orientation. The tool is compatible with all logging systems and available in a surface readout mode.

APPLICATIONS

  • Quantitative 4 pipes corrosion evaluation
  • Allocation of metal elements behind first pipe (360 deg)
  • Internal and external corrosion evaluation of a first pipe
  • Allocation of corroded areas in 360 degrees (first pipe)
  • Allocation of completion elements and perforations
  • Corrosion monitoring