Steering The Mudmotor By Means Of Magnetic Toolface

Steering the tool relative to magnetic toolface (inclination less than about 5°).

Steering tools are used in the magnetic toolface mode in vertical or near vertical wells to change azimuth.

The magnetic toolface angle isthe projection onto horizontal plane of the angle between magnetic North and toolface.

Magnetic North

Toolface

Bit and mudmotor trying to kick-off in the direction of 45° magnetic azimuth.

Looking down the drillstring towards the bit

M-11

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