Overview:
• The inclination limit of GWD is now increased to 70° and all attitude GWD is within sight
• Combination of gyro and magnetic sensors, surveying in real-time while drilling, will enhance the accuracy and reliability of wellbore positioning
Gyro While Drilling
• North Seeking gyro sensors located in the BHA
• Utilizes mud pulse or E.M. telemetry to transmit survey information to surface
• Primarily run to replace wireline gyro orientation and steering services
• Originally limited to about 20° inc.
Advantages
• High inclination re-entry and sidetracks and new wells
• Improved reliability of error models
• Real-time gross error detection
• In Hole Referencing of magnetic sensors, overcoming need for magnetic field monitoring and referencing
• Multi-shot survey on trip out at section TD
• Combination of gyro and magnetic surveys provide overall accuracy improvement
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View the entire Presentation:
Gyrodata Overcoming GWD Inclination Limits
Steve Mullin - Gyrodata Inc.