Flushby Trucks are used to get wells pumping after they have sanded up or the production has dropped off.

Unit is similar to a Pressure Truck but also has a derrick & a winch that are used to pull the pump rotor out of the stator at the bottom of the well.  By pulling up the rod string, the Flushby Truck then pumps fluid down the tubing to wash out the heavy oil and sand.  Once completed the well is put back in production.