System and method for controlling a chemical dosage
AssigneeSaudi Arabian Oil Company
InventorsKhaled Ali AlSayed, Saud F. AlSadhan
Life of this patent
Estimating the term…
Abstract
A wellhead system includes a wellhead, a fluid line extending from the wellhead, a branch line fluidly connected to the fluid line at an inlet and at an outlet, an ejector device arranged on the branch line, a tank fluidly connected by a tank fluid line to the ejector device, and a pressure control valve arranged on the branch line upstream of the ejector device. The ejector device is configured to produce a mixture that includes the fluid from the wellhead flowing in the branch fluid line with a chemical flowing the tank fluid line. The ejector device is also configured to discharge the mixture downstream of the ejector device. The pressure control valve is configured to control the flow of a fluid entering the ejector device.
Claims22
A wellhead system, comprising:
- a wellhead;
- a fluid line extending from the wellhead, the fluid line having a first location and a second location downstream of the first location, the fluid line configured to flow a fluid from the wellhead;
- a branch fluid line fluidly connected with the fluid line at the first location by an inlet of the branch line and fluidly connected with the fluid line at the second location by an outlet of the branch line, the branch fluid line configured to divert a portion of the fluid in the fluid line at the first location and discharge the fluid into the fluid line at the second location;
- a tank configured to contain a corrosion inhibitor chemical;
- a tank fluid line fluidly connected with the tank and the branch fluid line, the tank fluid line configured to flow a chemical from the tank to the branch line;
- an ejector device fluidly connected to the branch line and configured to draw a chemical from the tank via the tank fluid line, the ejector device configured to produce a mixture that comprises the fluid from the wellhead flowing in the branch fluid line with the chemical flowing in the tank fluid line, the ejector device configured to discharge the mixture downstream of the ejector device;
- and
- a pressure control valve arranged on the branch line configured to control the flow of the fluid entering the ejector device.
A computer-implemented method, comprising:
- receiving first data from a transceiver of a flow meter of a system, the system comprising:
- a fluid line having a first location and a second location downstream of the first location;
- a branch fluid line fluidly connected with the fluid line at the first location by an inlet of the branch line and at the second location by an outlet of the branch line;
- the flow meter arranged on the fluid line downstream of the second location, wherein the first data include a flow rate of a fluid in the fluid line measured at the flow meter;
- an ejector device configured to produce a mixture that comprises the fluid in the branch fluid line with a chemical flowing from a tank in a tank fluid line, the ejector arranged on the branch fluid line;
- a pressure control valve arranged on the branch line configured to control the flow of the fluid entering the ejector device and having a signal transceiver;
- and
- a controller operatively coupled to the transceiver of the pressure control valve and the transceiver of the flow meter;
- determining a chemical dosage of a corrosion inhibitor in the fluid measured at the flow meter based on the first data;
- and
- transmitting instructions to the pressure control valve to control a flow rate of the fluid discharged by the control pressure valve.
Dependencies are inferred from the claim text.