Resources Contact Us Home
Downhole motor

Image Number 2 for United States Patent #6230823.

A downhole hydraulic motor consisting of an outer rim having six or eight lobes on the toothed inner surface, a rotor having four or six lobes respectively on the toothed outer surface as well as a number of planetary gears being constantly engaged with both the outer rim and the rotor and dividing the space between the rim and the rotor into a number of working chambers changing their volume with the rotation of the motor. The working fluid is supplied to the working chambers through channels both in the rotor and the side covers, one of which can slide inside the outer rim to allow adjustment of the gap between the ends of the planetary gears and the side covers.

  Recently Added Patents
Bandpass filter and radio communication module and radio communication device using the same
Modified and stabilized GDF propeptides and uses thereof
Automatic portable electronic device configuration
Process of preparing functionalized polymers via enzymatic catalysis
Benzimidazole inhibition of biofilm formation
Method and system for filtering noises in an image scanned by charged particles
Detecting mirrors on the web
  Randomly Featured Patents
Interworking network element, interworking system between the CSI terminal and the IMS terminal and the method thereof
Composite torque tube captured end fitting
Barium oxide coated zirconia particle for use in an oxygen extractor
Latching assembly for a convertible sofa bed
Electrical fan support
Oxidative dehydrogenation of olefins to diolefins
Mechanical seal with embedded lubrication
Method and apparatus for detecting fraudulent loans
Test structure of semiconductor device
Hand-held body massager