1 in Downhole Wellbore Surveying

By: Multi-shot Surveyors  09-12-2011
Keywords: Drilling, Gyro, Magnetic Interference

The North Seeking Gyro is a highly accurate gimbal mounted gyroscope that detects earth rate and determines true North.  These tools require a stationary environment for 'compass' shots'.  They do not like high vibration environments.  Continuous or 'surveying on-the-fly' make this a a solid choice for high angle and horizontal well profiles.

Typical Applications

  • Precision survey in an environment with magnetic interference (drillstring / casing)
  • Precision high-angle survey in an environment with magnetic interference (drillstring / casing)
  • Precision orientation in an environment with magnetic interference (whipstock / motor)

The SRG is a free Gyroscope that needs to be oriented to a known location on surface prior to surveying or orientation.  These Gyros are extremely durable and most commonly used in applications where movement is present, like in drilling or offshore.

Typical Applications

  • Precision survey in an environment with magnetic interference (drillstring / casing)
  • Precision orientation in an environment with magnetic interference (whipstock / motor)
  • Live steering of motors (staying seated)
  • Core orientations

North Oriented Rate Gyro (battery gyro)

The North Oriented Rate Gyro uses the latest nano-technology to deliver accurate surveys in a surprisingly rugged package. Surveys are run much like with a magnetic multishot tool – the instrument is moved through the borehole and stopped at intervals to take static readings of inclination. The North Oriented Rate Gyro can be raised and lowered using a wireline/slickline, or by travelling with the drill string.

Typical Applications

  • Precision survey in an environment with magnetic interference and no electric line
  • Precision orientation in an environment with magnetic interference and no electric line
  • Drop gyro / trip retrieve in an environment with magnetic interference

The Electronic Multi-Shot is a good choice for cost-reduced operations where magnetic interference isn't an issue.  These tools are extremely durable and accurate and can be used in many configurations.

Typical Applications

  • Precision survey in an environment with no magnetic interference
  • Precision orientation in an environment with no magnetic interference
  • Slick-line or e-line conveyed battery surveys or orientations with no magnetic interference
  • Battery drop, drill pipe retrieval surveys in environments with no magnetic interference

The Electronic Single-Shot is an excellent choice for quick and accurate bottom hole survey or orientation. This tool is available on monthly rentals or daily with an operator.

Typical Applications

  • Precision bottom hole survey in an environment with no magnetic interference
  • Precision orientation in an environment with no magnetic interference
  • Slick-line or e-line conveyed battery survey or orientation with no magnetic interference
  • Battery drop, drill pipe retrieval survey in environments with no magnetic interference

The MSI-GeoTracer Vertical Monitoring Tool is a Vertical Monitoring M.W.D tool.  Durability and cost makes this an excellent choice for any drilling application.  This tool is available for monthly rentals or daily with an operator.

Typical Applications

  • Precision survey while drilling in an environment with no magnetic interference
  • Precision orientation while drilling  in an environment with no magnetic interference
  • Vertical well monitoring

Keywords: Drilling, Gyro, Magnetic Interference, Seeking Gyro,

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