Why Rod Lift?

Rod Pumping System is a system of artificial lift using a surface pumping unit to impart reciprocating motion to a string of rods. Rod string then extends to a positive displacement pump placed in well near producing formation. In other words, the primary function of a rod pumping system is to convert the energy supplied at the prime mover into the reciprocating motion of the pumping unit required to transmit energy through the rod pumping to the downhole pump in order to artificially lift the reservoir.

Rod Pumping System:

The rod pumping system is made up of three components:

  • The surface pumping unit: which provides the means of turning the rotating power and motion of the motor into the reciprocating motion at the correct speed needed at the pump.
  • The rod string: that connects the surface unit to the pump and provides the force at the pump to lift the fluid to the surface.
  • The pump: which pumps the fluid to the surface.

The integrity of this pumping system is only as good as each of the links or components.

Application Considerations:

Typical Range Maximum (Special Analysis Required)
Operating Depth 100 to 11,000 ft TVD 16,000 ft TVD
Operating Volume 5 to 1,500 BPD 5,000 BPD
Operating Temperature 100 to 350°F 550°F
Wellbore Deviation 0 to 20° Landed Pump 0° to 90° Landed Pump. <15°/100 ft Build Angle
Corrosion Handling Good to Excellent

With Upgraded Materials

Gas Handling Fair to Good
Solids Handling Fair to Good
Fluid Gravity >8° API
Servicing Workover or Pulling Rig
Prime Mover Type Gas or Electric
Offshore Application Limited
System Efficiency 45 to 60%

Advantages and limitations:

Advantages Limitations
  • High system efficiency
  • Optimization controls available
  • Economical to repair and service
  • Positive displacement/ strong drawdown
  • Upgraded materials reduce corrosion concerns
  • Flexibility. Adjust production through stroke length and speed.
  • High salvage value for surface and downhole equipment
  • Potential for tubing and rod wear
  • Gas-oil ratios
  • Most systems limited to ability of rods to handle loads. Volume decreases as depth increases.
  • Environmental and aesthetic concerns

 

 

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One Response to Why Rod Lift?

  1. It’s great that you’ve mentioned how one advantage of using rod lift products in a construction site is that it provides flexibility when it comes to pumping, as production can be adjusted depending on the length of the stoke and speed. My brother is interested to learn more about construction and I believe this includes the different equipment and how they are supposed to be used. I’ll share this with him so that he’ll know more about the rod lift as well as the advantages of using it.

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