Turbodrill:

When a turbodrill is used, rotary motion is imparted only at the bit; therefore, it is unnecessary to rotate the drill stem.

Although straight holes can be drilled with the tool, it is used most often in directional drilling.

Terms Related to Turbodrill

• Dyna-drill

  Trade name for a downhole motor driven by drilling fluid that imparts rotary motion to a drilling bit connected to the tool, thus eliminating the ...

• Sidetrack

  To use a whipstock, turbodrill, or other mud motor to drill around broken drill pipe or casing that has become lodged permanently in the hole.

• Swivel

  A rotary tool that is hung from the rotary hook and traveling block to suspend the drill stem and to permit it to rotate freely. ...

• Directional drilling

  1. Intentional deviation of a wellbore from the vertical. Although wellbores are normally drilled vertically, it is sometimes necessary or advantageous to drill at an ...

• Bent sub

  A short cylindrical device installed in the drill stem between the bottom-most drill collar and a downhole motor. Its purpose is to deflect the downhole ...

• Rotary table

  The principal component of a rotary, or rotary machine, used to turn the drill stem and support the drilling assembly. It has a beveled gear ...

• Drill stem

  All members in the assembly used for rotary drilling from the swivel to the bit, including the kelly, drill pipe and tool joints, drill collars, ...