Operations Manual
Controlling inclination at low angles – Unrequired changes in inclination can occur when drilling low angle tangent sections, the table below has recommendations to reduce large changes in inclination.
Steering Percentage
Objective
Magnetic toolface
Flow Rate
Holding inclination when <20 o
Near target azimuth
20%
100% of target flow
Near target azimuth
Slight build when <20 o
20-40%
100% of target flow
Near target azimuth
Reduce flow by 5-10%
Slight drop when <20 o
20%
Aggressive build when <20 o
Near target azimuth
80-100%
100% of target flow
Aggressive drop when <20 o
Near target azimuth
60-80%
100% of target flow
Once inclination reaches 20 o the switch from magnetic to gravity and INC hold steering modes should occur, however inconsistent steering results may occur at inclination higher than 20 o and magnetic steering can be used to correct.
OPS-FIELD-001 | Rev. H
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