What is kelly bushing elevation?
Hereof, what is the kelly bushing?
Kelly Bushing, also known as Drive Bushing, is a drilling device that is used to connect a Kelly with a rotary table. This tool is used to fit inside the head where the Kelly fits.
Furthermore, what is datum depth? Datum depth is the depth measured from surface where the wellbore flowing pressure is measured or calculated at for a multi-layered reservoir.
Beside this, what is the difference between Kelly and kelly bushing?
When drilling, the drill bit is attached at the end of the drill string and thus the kelly drive provides the means to turn the bit (assuming that a downhole motor is not being used). The kelly is the polygonal tubing and the kelly bushing is the mechanical device that turns the kelly when rotated by the rotary table.
What does Tvdss mean?
True Vertical Depth SS