Earth Boring, Well Treating, And Oil Field Chemistry Patents (Class 507)

Preventing contaminant deposits in petroleum oil conduits (Class 507/90)

Earth boring (Class 507/100)

Well treating (Class 507/200)

Organically modified inorganic solid (Class 507/901)

Controlled release agent (Class 507/902)

Crosslinked resin or polymer (Class 507/903)

Process of making fluids or additives therefor (Class 507/904)

Nontoxic composition (Class 507/905)

Solid inorganic additive in defined physical form (Class 507/906)

Indicating means (e.g., dye, fluorescing agent, etc.) (Class 507/907)

Earth boring fluid devoid of discrete aqueous phase (Class 507/910)

Biocidal (Class 507/920)

Specified breaker component for emulsion or gel (Class 507/921)

Fracture fluid (Class 507/922)

Completion or workover fluid (Class 507/925)

Packer fluid (Class 507/926)

Well cleaning fluid (Class 507/927)

Acidizing or formation destroying (Class 507/933)

Enhanced oil recovery (Class 507/935)

Corrosion inhibitor (Class 507/939)

Freeing stuck object from wellbore (Class 507/940)

Class-related foreign documents (Class 507/FOR000)