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
Context data in UPNP service information
Method and system for leveraging the power of one's social-network in an online marketplace
Method for treating wounds for mammals, wound healer compound, and method of manufacturing thereof
Method and system for coordinating client and host security modules
Proton conducting electrolytes with cross-linked copolymer additives for use in fuel cells
Listing recommendation using generation of a user-specific query in a network-based commerce system
Method for culturing lactic acid bacterium and method for producing fermented milk
  Randomly Featured Patents
Flexible strip key
Subsea well injection and monitoring system
Automatic adjustment of time a consumer waits to access data from queue during a waiting phase and transmission phase at the queue
Bird cape
Continuous casting of bulk solidifying amorphous alloys
Levitating ball toy
Polyurethane elastomers having improved physical properties and a process for the production thereof
Method for monitoring the degree of fouling of a filter
Method of stimulating histamine H.sub.2 -receptors
Load beam and flexure assembly having flexible arms with specific width ratios