Bushing:

A pipe fitting on which the external thread is larger than the internal thread to allow two pipes of different sizes to be connected.

2.

A removable lining or sleeve inserted or screwed into an opening to limit its size, resist wear or corrosion, or serve as a guide.

Terms Related to Bushing

• Tap

  1. A tool for forming an internal screw thread. It consists of a hardened tool-steel male screw grooved longitudinally so as to have cutting edges. ...

• Sub

  A short, threaded piece of pipe used to adapt parts of the drilling string that cannot otherwise be screwed together because of differences in thread ...

• Kelly bushing

  A special device that, when fitted in to the master bushing, transmits torque to the kelly and simultaneously permits vertical movement of the kelly to ...

• Drive bushing

  See kelly bushing

• Master bushing

  A device that fits into the rotary table to accommodate the slips and drive the kelly bushing so that the rotating motion of the rotary ...

• Crossover

  A short subassembly used to enable two components with different thread types or sizes to be connected. abbr. Xo.

• Thread protector.

  A metal or plastic device that is screwed onto or into pipe threads to protect 5them from damage when the pipe is not in use.