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
Change management automation tool
Method and system for the assignment of security group information using a proxy
Video stabilization
Morphinan compounds
Content protection apparatus and content encryption and decryption apparatus using white-box encryption table
Method and system for selecting a target with respect to a behavior in a population of communicating entities
Non-intrusive processor tracing
  Randomly Featured Patents
Multi-fuel storage system and method of storing fuel in a multi-fuel storage system
Non-volatile memory device with single-layered overwriting transistor
Multiplexed sigma-delta interface
Bioavailable capsule compositions of amorphous alpha-(N-sulfonamido)acetamide compound
Stack processing tray for integrated circuit devices
Handheld portable tubing cutter drivable by handheld power drill and having a minimized working profile
Process and apparatus to substantially maintain the composition of a mixed refrigerant in a refrigeration system
Metal display panel having one or more translucent regions
Tractor pump jet
3,6-Di-t-butyl-2-naphthyl catechol phosphite and compositions thereof