Pump diffuser anti-spin device

摘要

In a downhole centrifugal pump, diffusers are stacked one on top of each other inside of tubular pump housing without contacting the pump drive shaft or impellers. A first compressive device applies a pre-compressive force to a stack of diffusers to prevent the diffusers from rotating inside the tubular housing of the pump with the drive shaft. A second compressive device located between the first compressive device and the stack of diffusers applies another compressive load on the stack of diffusers in the event the first compressive device ceases to apply the compressive load.