Definition of Surveying Terms
Definition of Surveying Terms from accelerometer to wireline
A device for measuring the acceleration of a body in a particular direction. Accelerometers are used in solid state magnetic tools, surface read out gyros, North Seeking Gyro tools and Inertial Navigation systems to sense changes of direction of the tool with respect to the Earth's gravity vector.
The distance between the bottom of a drilling barge or platform and the Mean Sea Level.
Along-hole Depth (AHD)
The distance measured along the actual course of the . . .