Sub-Surface Sucker Rod Pumps

The workover process of the tubing pump is as follows: firstly the barrel being connected to the tubing is directly run into the well at desired depth and then the plunger is run into the barrel with the sucker rod. The applicable tubing pump is larger in size than a corresponding rod pump typically used for the same diameter pipe, The tubing pump also has a simple structure, giving it a greater displacement and making it most suitable for shallow wells with high production.

The THD type of tubing pump means that its standing valve is directly connected to the barrel and it cannot be pulled up separately with the barrel. The THC or THM type of tubing pump means that its standing valve can be pulled up separately with the barrel. The seating assembly of THC pump is cup type and for THM is mechanical type. The THC and THM type of tubing pump are suitable for the frequently work-over wells.