M-I Drilling Fluids
11Patents
3Active
11Granted
36Portfolio score
Filing activity: Mar 20, 1987 → Sep 21, 1995
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5424284A | Drilling fluid additive and method for inhibiting hydration | Chemistry; Metallurgy | 115 | Expired |
| US5189012A | Oil based synthetic hydrocarbon drilling fluid | Emerging Cross-Sectional Technologies | 99 | Expired |
| US5090498A | Water wash/oil wash cyclonic column tank separation system | Fixed Constructions | 66 | Expired |
| US5707939A | Silicone oil-based drilling fluids | Chemistry; Metallurgy | 51 | Expired |
| US4816551A | Oil based drilling fluids | Chemistry; Metallurgy | 37 | Expired |
| US5134118A | Aqueous based drilling fluid | Chemistry; Metallurgy | 35 | Expired |
| USH1611H | Glycols as internal phase in oil well drilling fluids | General | 17 | Active |
| USH1000H | Water based synthetic hydrocarbon drilling fluid and spotting fluid | General | 15 | Active |
| US5639715A | Aqueous based drilling fluid additive and composition | Chemistry; Metallurgy | 13 | Expired |
| US5149690A | Drilling fluid additive and method for inhibiting hydration | Chemistry; Metallurgy | 11 | Expired |
| USH935H | Compositions for oil-base drilling fluids | General | 5 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.