Automatic chemical treatment system with liquid level sensor in chemical tank for calibration and chemical dispensing rate control
OwnerRobert N. Ayresinventor
Life of this patent
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Abstract
A wellbore chemical treating system include a storage vessel for containing a treating chemical. A chemical dispenser is in fluid communication between an outlet of the vessel and a well for selectively controlling the flow of the chemical from the vessel to the well. A liquid level sensor is disposed in the storage vessel. A controller is in signal communication with the liquid level sensor and is configured to operate the chemical dispenser. The controller is configured to adjust an operating time of the chemical dispenser based on changes in a liquid level measured by the liquid level sensor over a selected period of time.
Claims12
A wellbore chemical treating system, comprising:
- a vessel for containing a treating chemical;
- a first control valve in fluid communication between an outlet of the vessel and a well for selectively controlling the flow of the chemical from the vessel to the well;
- a liquid level sensor disposed in the vessel;
- and
- a controller in signal communication with the liquid level sensor and configured to operate the first control valve, the controller configured to adjust an operating time of first control valve based on differences between a predetermined rate of change in a liquid level and a measured rate of change in the liquid level in the vessel measured by the liquid level sensor over a selected period of time.
A method for displacing treatment chemical in liquid form into a well, comprising:
- at selected times displacing a selected amount of a treatment chemical into the interior of the well from a storage vessel;
- automatically measuring an amount of the treatment chemical in the storage vessel over a selected period of time to determine a measured rate of change in the measured amount of the treatment chemical in the storage vessel;
- and
- comparing a predetermined rate of change of an amount of the treatment chemical in the storage vessel to the measured rate of change in the measured amount of chemical in the storage vessel and adjusting the selected amount of displaced chemical at the selected times based on the comparison.
Dependencies are inferred from the claim text.