Oilfield Glossary
Oilfield Glossary
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Tools

high side toolface

1. n. [Drilling]
Toolface angle used for deviated wells. High side toolface is the angle of the borehole survey instrument within the wellbore measured clockwise relative to up and in the plane perpendicular to the wellbore axis; the high side (maximum build), maximum right, low side (maximum drop) and maximum left directions have high side toolface angles of 0°, 90°, 180° and 270°, respectively.
Synonyms: gravity toolface
Alternate Form: high-side toolface, highside toolface