KUDU Equalizer Progressive Cavity Pump | Schlumberger

KUDU Equalizer Progressive Cavity Pump

Positive displacement pump for wells with high gas/oil ratio or high-viscosity fluids

Extended run life
Compared with conventional PCPs in gassy or heavy oil environments
Improved economics
Reduced rig time, equipment costs, and deferred production due to fewer changeouts
Simple installation
No additional equipment required

Use in wells with high gas/liquid ratio (GLR) and heavy oil

The KUDU Equalizer progressive cavity pump (PCP) achieves optimal pressure distribution throughout the pump while stabilizing the temperature, controlling slippage rates, and compensating for compressed gas volume. It can handle more than 50% gas volume fraction. 

The technology is especially effective in wells with

  • high GLR
  • low reservoir pressure
  • high-viscosity fluids.
Schematic of KUDU Equalizer progressive cavity pump downhole and surface equipment.
Progressive Cavity Pump Run Life More Than Triples in Heavy Oil Field with High GOR
Innovative design improves pressure and temperature profile across pump stages, significantly reducing stress on components.
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Max. vertical setting depth 10,000 ft [3,000 m], depending on application
Production rate 12–3,775 bbl/d [2–600 m3/d]
Operational speed range 50–500 rpm
Downhole temperature rating 248 degF [120 degC]

Enhance hydraulic performance and extend pump run life

With a conventional PCP in a high-GLR well, most of the pump's energy in the lower stages is used to compress the free gas and the pressure increases slowly. Once compression is complete, pressure rises rapidly across the upper stages and can damage the pump. By distributing compression more evenly across its length, the KUDU Equalizer PCP extends run life.

High-GLR wells with different artificial lift systems, such as a beam pump, ESP, or gas lift, are also good candidates for a KUDU Equalizer PCP installation.

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In low-GLR wells, the pressure differential between a PCP's intake and discharge is distributed uniformly across the interval. However, in high-GLR wells fitted with a conventional PCP, the pressure increases faster higher up the pump. As a result, the upper section may be working at two to three times the designed pressure. Moreover, free gas provides less lubrication than liquid, leading to more friction and higher pump temperature. The result is more equipment stress, elastomer deformation, greater hysteresis effects, and premature failure. KUDU Equalizer PCPs shift the pressure and temperature profiles closer to the ideal, prolonging system run life.
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