Earth Drilling, E.g. Deep Drilling ; Obtaining Oil, Gas, Water, Soluble Or Meltable Materials Or A Slurry Of Minerals From Wells
G01V
Geophysics; Gravitational Measurements; Detecting Masses Or Objects; Tags
B01J
Chemical Or Physical Processes, E.g. Catalysis Or Colloid Chemistry; Their Relevant Apparatus
C10G
Cracking Hydrocarbon Oils; Production Of Liquid Hydrocarbon Mixtures, E.g. By Destructive Hydrogenation, Oligomerisation, Polymerisation ; Recovery Of Hydrocarbon Oils From Oil-shale, Oil-sand, Or Gases; Refining Mixtures Mainly Consisting Of Hydrocarbons; Reforming Of Naphtha; Mineral Waxes
C01B
Non-metallic Elements; Compounds Thereof; ; Metalloids Or Compounds Thereof Not Covered By Subclass C01c
