This is also an alias for "True North Azimuth" for the REFLEX EZ-GYRO.
This is an alias used in the industry to refer to "Mag Azimuth" when using the REFLEX EZ-TRAC instrument.
This is an alias used in the industry to refer to "Dip" when using the REFLEX EZ-TRAC instrument.
Dogleg severity is a measure of the amount of change in the inclination, and/or azimuth of a borehole, expressed in degrees per 100 feet of course length. In the metric system, it is expressed in degrees per 30 meters or degrees per 10 meters of course length.
Obsolete field or functionaility. Also includes:
DMS Config
DMS Dashboard
DMS monitoring system
The difference between the calculated and measured Earth rotation based on latitude.
Total gravity measured by the accelerometers (Gravity is = 1 nominally)
This is an alias used in the industry to refer to "Dip" when using the REFLEX EZ-GYRO instrument.
The magnetic dip is the angle from the horizontal plane to the magnetic lines of force. The magnetic dip can vary depending on one’s position on the surface of the Earth. Near the equator it approaches horizontal (0 degrees), but steeper towards vertical (90 degrees) at the poles. The general convention is that the magnetic dip is positive (downwards) in the northern hemisphere and negative (upwards) in the southern.
The total magnetic field is the absolute value of the magnetic field vector. It is basically the strength or intensity of the magnetic field in an area measured in (nT).
When distinguishing the magnetic intensity and dip in a certain location the latitude and longitude is used to determine the reference. The magnetic survey instrument on site can also be used, providing the instrument is used in a low to no magnetic area.
The reference for both magnetic dip and total magnetic field can be found at https://www.ngdc.noaa.gov/geomag-web/.
When the data is evaluated by QA, it has a tolerance of +/-1000(nT) either side of the mag total reference to establish whether the data has been effected by magnetics or not. For magnetic dip, it has a tolerance of +/- 0.5 degrees.
The tools rotation in relation to Gravity. The tool has an external “Toolface” mark that is used for orientating a wedge or motor for directional drilling.
The temperature of the gyro.
Sub in survey tools usually means accessory or external component to the primary survey instrument.
