Lazy board:

Terms Related to Lazy board

• Jack board

  A device used to support the end of a length of pipe while another length is being screwed on

• Jack knife rig

  A rig with a folding mast that can be lowered and raised relatively quickly.

• Beam pumping unit

  A machine designed specifically for sucker rod pumping. An engine or motor (prime mover) is mounted on the unit to power a rotating crank. The ...