Resources Contact Us Home
Controller for oil wells with a thermal dispersion probe

Image Number 8 for United States Patent #5525040.

A controller for controlling the pumping unit for an oil well comprises a housing having a first and a second tip for placement in a flow of oil between the wellbore to holding tanks; means for generating a substantially constant power; a constant power heater in the first tip connected to the means for generating, for radiating a substantially constant heat; means for determining the temperature at each the first and second tips and for generating a digital signal indicative of the temperature of the first and second tips; supervising means for controlling the means for determining, processing the digital signal for determining a rolling average signal, and generating a control signal therefrom which is independent of ambient temperature of the oil flow; and means for switching the pumping unit on or off, according to the control signal. The controller further comprises means for calibrating the means for determining. The constant power heater is preferably a FET connected in series with a resistor. The invention also provides a optimizing method for controlling a pumping unit of an oil well.

  Recently Added Patents
Systems, devices, methods, and compositions including fluidized x-ray shielding compositions
Estimating optical characteristics of a camera component using sharpness sweep data
System and method of detecting and locating intermittent and other faults
Communication device and method for detecting a radio signal
Nanogap device for field enhancement and a system for nanoparticle detection using the same
Bi-directional switch using series connected N-type MOS devices in parallel with series connected P-type MOS devices
  Randomly Featured Patents
Multibeam phased array antenna system
Silica glass member for UV-lithography, method for silica glass production, and method for silica glass member production
Waveform synthesis for imaging and ranging applications
Method and system for creating profiling indices
Breadmaker with a hidden heating element
Polypeptides of lipopolysaccharide binding protein
Tricuspid ring and template
Channel request and contention resolution apparatus and method
Machinists V-block
Cassette loading device for video cassette recorder