Sub-Surface Rod Pumps
The rod pump is connected to the sucker rod after being assembled on the surface then it is lowered down to the well bottom through the tubing. Thus it is convenient for inspection and workover because it can be pulled up and down through the tubing and is therefore suitable for deeper well. The lifespan of the tubing can also be prolonged due to the reduction of the number of makeup cycles. The rod pump can be classified into two types: mechanical seating and cup seating. Also it is divided into three types: RHA (stationary heavy well barrel top anchor rod pump), RHB (stationary heavy well barrel bottom anchor rod pump) and RHT (traveling heavy well barrel bottom anchor rod pump).
|The sucker rod is an important part of the rod production equipment which drives the downhole pump from the motor of the pumping units. We produce the continuous sucker rod, ordinary sucker rod, pony rod, hollow sucker rod, special sucker rod, and polished rod.|
|Grade||Yield Strengh MPa||Tensile Strengh MPa||Elogation %||Reduction of Area %|
|C||larger or equal to 414||620-793||larger or equal to 13||larger or equal to 50|
|D||larger or equal to 586||793-965||larger or equal to 10||larger or equal to 48|
|H||larger or equal to 793-862||larger or equal to 966-1136||larger or equal to 12||45-55|
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.
|Model||Nominal Dia. mm(in)||Plunger Length m(ft)||Stroke m||Pump Constant m3/d||Tubing And Thread||Sucker Rod|