Here is a smart drone with SeekIR gas sensors that can be used for oil & gas leak inspections. SeekOps uses the US-1 drone by Impossible Aerospace to inspect large & complex facilities. The US-1 drone has 78min of flight time. It has max payload of 1.5 lb and speed of 40 mph.
SeekIR is a miniaturized methane sensor with great resolution for leak grading. It can detect natural gas emissions as low as 1 standard cubic foot per hour.