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
Computerized on-board system for controlling a train
Automatic misalignment balancing scheme for multi-patterning technology
High-performance AHCI interface
Alkaline battery
Case for electronic device
Communications in an asynchronous cellular wireless network
Key management policies for cryptographic keys
  Randomly Featured Patents
Benzenesulfonamides and the use thereof to modulate the activity of endothelin
Method of mounting an implement to a prime mover
Gelatinous cushions with buckling columns
Downhill coasting situation detecting device for automotive vehicle
Hang-up fixture
Simulative still
Tricyclic diterpene derivatives
Electronic clock
System for winding a cone of yarn or the like
Scheduling in an RFID system having a coordinated RFID tag reader array