Closed loop additive injection and monitoring system for oilfield operations
First Claim
1. A system for monitoring and controlling a supply of an additive introduced into formation fluid within a production wellbore, comprising:
- (a) a flow control device for supplying a selected additive from a source thereof at a wellsite to the formation fluid being recovered from the production wellbore;
(b) a flow measuring device for providing a signal representative of the flow rate of the selected additive supplied to said formation fluid in the production wellbore;
(c) a first onsite controller receiving the signals from the flow measuring device and determining therefrom the flow rate, said first onsite controller transmitting signals representative of the flow rate to a remote location; and
(d) a second remote controller at said remote location receiving signals transmitted by said first controller and in response thereto transmitting command signals to said first controller representative of a desired change in the flow rate of the selected additive;
wherein the first onsite controller causes the flow control device to change the flow rate of the selected additive in response to the command signals and the system supplies the selected additive such that it is present at a concentration of from about 1 ppm to about 10,000 ppm in the formation fluid recovered from the production wellbore, and the first onsite controller is programmed with a step based flow rate control model.
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Accused Products
Abstract
A system is provided that monitors at the wellsite injection of additives into formation fluids recovered through wellbores and controls the supply of such additives from remote locations. The selected additive is supplied from a source at the wellsite into the wellbore via a suitable supply line. A flow meter in the supply line measures the flow rate of the additive through the supply line and generates signals representative of the flow rate. A controller at the wellsite determines the flow rate from the flow meter signals and in response thereto controls the flow rate of the additive to the well. The wellsite controller interfaces with a suitable two-way communication link and transmits signals and data representative of the flow rate and other parameters to a second remote controller. The remote controller transmits command signals to the wellsite controller representative of any change desired for the flow rate.
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Citations
25 Claims
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1. A system for monitoring and controlling a supply of an additive introduced into formation fluid within a production wellbore, comprising:
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(a) a flow control device for supplying a selected additive from a source thereof at a wellsite to the formation fluid being recovered from the production wellbore;
(b) a flow measuring device for providing a signal representative of the flow rate of the selected additive supplied to said formation fluid in the production wellbore;
(c) a first onsite controller receiving the signals from the flow measuring device and determining therefrom the flow rate, said first onsite controller transmitting signals representative of the flow rate to a remote location; and
(d) a second remote controller at said remote location receiving signals transmitted by said first controller and in response thereto transmitting command signals to said first controller representative of a desired change in the flow rate of the selected additive;
wherein the first onsite controller causes the flow control device to change the flow rate of the selected additive in response to the command signals and the system supplies the selected additive such that it is present at a concentration of from about 1 ppm to about 10,000 ppm in the formation fluid recovered from the production wellbore, and the first onsite controller is programmed with a step based flow rate control model. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification