Resources Contact Us Home
Pressure drop regulator for downhole turbine

Image Number 2 for United States Patent #4553611.

In a borehole forming operation, the flow of gas through a downhole pneumatic motor is regulated to eliminate horsepower variations due to variations in bottom hole pressure. The pneumatic motor is connected to the lower end of a tubing string and an orifice is placed within the entrance and exit gas passageways leading to and from the pneumatic motor. The uphole source (i.e., compressors) of gas pressure and gas flow rate is maintained as a constant value which assures that sonic flow conditions exist at the lower orifice. The employment of gauged orifices placed within the inlet and exit passageways of the gas motor assures that sonic flow conditions exist at the lower orifice and as the bottom hole pressure varies, there is no resultant change in the motor output horsepower since constant flow rate and pressure drop ratio through the motor is maintained. This is the case so long as the bottom hole pressure does not increase to the critical ratio.

  Recently Added Patents
Methods of prognosing a rheumatoid arthritis remission phenotype
Clostridium chauvoei polypeptide, DNA encoding the polypeptide and a vaccine comprising the polypeptide
Data consumption framework for semantic objects
Image-processing method and program, and image-processing apparatus
Polymeric structures comprising a siloxane
Crystalline solvates of 6-(piperidin-4-yloxy)-2H-isoquinolin-1-one hydrochloride
Mask and method for forming the mask
  Randomly Featured Patents
Wall connection
Computer-based image display systems having direct and projection modes of viewing
Multi-layer container
Loss of lock detector for master timing generator
Secondary seal for tank having floating roof
Print dipole antenna and manufacturing method thereof
Bus steering structure for low cost pipelined processor system
Connector system for attachment of flexible hose to PEX supply line
Electrical switching component
Composition for removing a film from a substrate, a method of removing a film from a substrate, and a method of making the composition