US 12,263,512 B2
Devices and techniques relating to landfill gas extraction
Andrew Campanella, Somerville, MA (US); Joseph G. Michels, New York, NY (US); Peter Quigley, Duxbury, MA (US); and Ian Martin, Higganum, CT (US)
Assigned to Loci Controls, Inc., Wareham, MA (US)
Filed by Loci Controls, Inc., Wareham, MA (US)
Filed on Oct. 31, 2023, as Appl. No. 18/498,869.
Application 18/498,869 is a continuation of application No. 18/327,694, filed on Jun. 1, 2023, granted, now 11,850,639.
Application 18/327,694 is a continuation of application No. 18/168,983, filed on Feb. 14, 2023, granted, now 12,151,271.
Application 18/168,983 is a continuation of application No. 17/369,318, filed on Jul. 7, 2021, granted, now 11,602,777, issued on Mar. 14, 2023.
Application 17/369,318 is a continuation of application No. 16/745,892, filed on Jan. 17, 2020, granted, now 11,072,006, issued on Jul. 27, 2021.
Application 16/745,892 is a continuation of application No. 15/493,174, filed on Apr. 21, 2017, granted, now 10,576,514, issued on Mar. 3, 2020.
Application 15/493,174 is a continuation in part of application No. 14/532,807, filed on Nov. 4, 2014, granted, now 10,029,290, issued on Jul. 24, 2018.
Claims priority of provisional application 61/913,628, filed on Dec. 9, 2013.
Claims priority of provisional application 61/899,828, filed on Nov. 4, 2013.
Prior Publication US 2024/0066573 A1, Feb. 29, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. B09B 1/00 (2006.01); E21B 43/00 (2006.01)
CPC B09B 1/006 (2013.01) [E21B 43/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A control system for controlling extraction of landfill gas from a landfill, the control system comprising:
a gas analysis sample chamber comprising an input port, wherein the input port enables a sample of landfill gas extracted from the landfill to flow into the gas analysis sample chamber;
a plurality of sensors disposed within the gas analysis sample chamber and configured to measure characteristics of the sample of landfill gas in the gas analysis sample chamber,
an actuator configured to control a flow control mechanism that controls a flow rate of landfill gas being extracted from the landfill;
at least one controller configured to perform:
obtaining, using the plurality of sensors, a measurement of a concentration of oxygen in the sample of landfill gas, a measurement of a concentration of carbon dioxide in the sample of landfill gas, and a measurement of a concentration of methane in the sample of landfill gas;
determining, based on the measurement of the concentration of oxygen in the sample, the measurement of the concentration of methane in the sample, and the measurement of the concentration of carbon dioxide in the sample, a balance gas concentration in the sample;
determining whether the determined balance gas concentration in the sample is greater than a balance gas concentration threshold; and
when it is determined that the determined balance gas concentration in the sample is greater than the balance gas concentration threshold, controlling the actuator to control the flow control mechanism to decrease the flow rate of the landfill gas being extracted from the landfill.