(010)Toolfaces

© 2000, Halliburton Energy Services, Inc.
09/16/2023
Magnetic Toolface - What is it?
Magnetic Toolface uses the magnetometers to determine which way the bit is pointing in reference to magnetic north.
0 does not indicate “up”.

© 2000, Halliburton Energy Services, Inc.
09/16/2023
Gravity Toolface - What is it?
Gravity Toolface uses the accelerometers to determine the “high side of the hole”.
0 is “up”
90 is right
180 is down
270 is left

Toolface Offset
For the PCD, toolface offset is calculated from rig floor offset (RFO) and high side gravity offset (HSG).

© 2000, Halliburton Energy Services, Inc.
09/16/2023
Rig Floor Offset (RFO)
Rig Floor Offset is the measurement, in degrees, clockwise from the PCD tool scribe line/HOC to the bent sub/mud motor scribe line looking down.

© 2000, Halliburton Energy Services, Inc.
09/16/2023
High Side Gravity Offset (HSG)
High Side Gravity Offset is the measurement, in degrees, clockwise from the flow tube/HOC scribe line to the highside of the PCD.