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Hardware

   
OBI40 Optical Televiewer tool

Obi40

The tool generates a continuous oriented 360 image of the borehole wall unwrapped using an optical imaging system (downhole CCD camera which views a reflection of the borehole wall in a prism mirror). The tool includes a full orientation device consisting of a precision 3 axis magnetometer and 2 accelerometers thus allowing for both accurate borehole deviation data to be obtained during the same logging run, and for accurate and precise orientation of the image.

The optical televiewer is fully downhole digital and can be run on any standard winches (mono, 4 conductors, 7 conductors). It is directly compatible with the ALT acquisition system using acquisition and processing software (ALTlogger and WellCAD). Resolution is user definable (up to 0.5 mm Vertical resolution and 720 pixels Azimuthal resolution).

Applications :

The purpose of the optical tool is to provide detailed, oriented, structural information when the accoustic cannot operated (air or clean water filled boreholes)
 

  • fracture detection and evaluation
  • detection of thin beds and bedding dip
  • lithological characterization
  • casing inspection
  • high resolution caliper measurements
  •   HarbourDom GmbH 2012             impressum