Energy Glossary
Energy Glossary
Trip
The act of pulling drill pipe out of the hole or running it back in.
True Vertical Depth (TVD)
The vertical distance from surface to a point in the well.
Top of Cement (TOC)
The highest point cement reaches in the annulus.
Toolface
The orientation of the BHA or motor relative to the high side of the wellbore.
Top Drive
A rotating system that turns the drill string from above the rig floor.
Torque and Drag Modeling
Software modeling used to predict mechanical limits and drilling risks.
Twist-Off
Failure of drill string components due to excessive torque.
Time-Depth Curve
Representation of drilling progress over time.
Trip
The act of pulling drill pipe out of the hole or running it back in.
True Vertical Depth (TVD)
The vertical distance from surface to a point in the well.
Top of Cement (TOC)
The highest point cement reaches in the annulus.
Toolface
The orientation of the BHA or motor relative to the high side of the wellbore.
Top Drive
A rotating system that turns the drill string from above the rig floor.
Torque and Drag Modeling
Software modeling used to predict mechanical limits and drilling risks.
Twist-Off
Failure of drill string components due to excessive torque.
Time-Depth Curve
Representation of drilling progress over time.

