Positive displacement motor/progressive cavity pump

Progessive cavity pump

Progressing cavity pump

Progressing cavity pump assembly and method of operation

Progressing cavity pump having less compressive fit near the dis

Progressing cavity pump including a stator modified to improve m

Progressing cavity pump or motor

Progressing cavity pump with dual material stator

Progressing cavity pump with wobble stator and magnetic drive

Progressing cavity pumps with split extension tubes

Progressing cavity stator including at least one cast...

Progressing cavity stator including at least one cast...

Progressive cavity compressor having check valves on the...

Progressive cavity drive train

Progressive cavity drive train

Progressive cavity helical device

Progressive cavity motors using composite materials

Progressive cavity pump

Progressive cavity pump or motors

Progressive cavity pump with tamper-proof safety