Top 100 US Patents in Drilling for oil, gas, etc.
section e - fixed constructions > earth or rock drilling; mining > earth or rock drilling; obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
Sorted by IPQ® Score, an objective measure of patent quality. View scores and methodology at PatentRatings.com. You can also view all by publication date instead.
