Identification of residual gravitational signal from drilling tool sensor data

A system comprising:

• One or more processors;
• and
• a non-transitory computer-readable medium comprising instructions stored therein, which when executed by the processors, cause the processors to perform operations comprising:
• receiving a first orientation signal, wherein the first orientation signal comprises a magnetic field signal generated from measurements produced by a at least one magnetometer disposed in a drillstring;
• receiving a second orientation signal;
• processing the magnetic field signal to generate a clean magnetic field signal;
• and
• calculating a residual signal based on the clean magnetic field signal and the second orientation signal;
• and
• identifying a characteristic of drilling operation performance associated with the drillstring based on the residual signal.

A non-transitory computer-readable storage medium comprising instructions stored therein, which when executed by one or more processors, cause the processors to perform operations comprising:

• receiving a first orientation signal, wherein the first orientation signal comprises a magnetic field signal generated from measurements produced by at least one magnetometer disposed in a drillstring;
• receiving a second orientation signal;
• processing the magnetic field signal to generate a clean magnetic field signal;
• and
• identifying a characteristic of drilling operation performance associated with the drillstring based on the residual signal.