An operator was using conventional progressive cavity pumps (PCPs) in a heavy oil field with high levels of free gas. Average run life was just 133 days despite use of gas separators, and the frequent changeouts were increasing opex to unacceptable levels.

Schlumberger proposed its KUDU Equalizer PCP, which is especially effective in wells with high gas/liquid ratio (GLR), low reservoir pressure, or high-viscosity fluids. Unlike
conventional PCPs, it achieves optimal pressure distribution throughout the pump while stabilizing the temperature, controlling slippage rates, and compensating for
compressed gas volume. These features serve to protect the pump, including elastomers, and prolong run life.