M-I L.L.C.
442Patents
338Active
442Granted
57Portfolio score
Filing activity: Jul 3, 1995 → Oct 8, 2020 · 169 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5908814A | Drilling fluid additive and method for inhibiting hydration | Chemistry; Metallurgy | 131 | Expired |
| US6818594B1 | Method for the triggered release of polymer-degrading agents for oil field use | Emerging Cross-Sectional Technologies | 110 | Expired |
| US8079751B2 | Apparatus for homogenizing two or more fluids of different densities | Performing Operations; Transporting | 93 | Active |
| US5977031A | Ester based invert emulsion drilling fluids and muds having negative alkalinity | Emerging Cross-Sectional Technologies | 85 | Expired |
| US6770603B1 | Electrically conductive non-aqueous wellbore fluids | Emerging Cross-Sectional Technologies | 72 | Expired |
| US6793025B2 | Double emulsion based drilling fluids | Emerging Cross-Sectional Technologies | 71 | Expired |
| US7078005B2 | Process for the reduction or elimination of hydrogen sulphide | Chemistry; Metallurgy | 58 | Expired |
| US6884760B1 | Water based wellbore fluids | Emerging Cross-Sectional Technologies | 53 | Expired |
| US7596481B2 | Three-dimensional wellbore analysis and visualization | Physics | 51 | Active |
| US8227382B2 | Breaker fluids and methods of using the same | Emerging Cross-Sectional Technologies | 50 | Active |
| US6715568B1 | Latex additive for water-based drilling fluids | Chemistry; Metallurgy | 47 | Expired |
| US5888944A | Oil-based drilling fluid | Chemistry; Metallurgy | 46 | Expired |
| US6179070A | Vacuum tank for use in handling oil and gas well cuttings | Performing Operations; Transporting | 46 | Expired |
| US6213227A | Oil and gas well cuttings disposal system with continous vacuum operation for sequentially filling disposal tanks | Performing Operations; Transporting | 46 | Expired |
| US6179071A | Method and apparatus for handling and disposal of oil and gas well drill cuttings | Performing Operations; Transporting | 46 | Expired |
| US6861394B2 | Internal breaker | Emerging Cross-Sectional Technologies | 44 | Expired |
| US6575244B2 | System for controlling the operating pressures within a subterranean borehole | Fixed Constructions | 42 | Expired |
| US7603264B2 | Three-dimensional wellbore visualization system for drilling and completion data | Physics | 41 | Active |
| US6822039B1 | Invertible emulsions stabitised by amphiphilic polymers and application to bore fluids | Chemistry; Metallurgy | 41 | Expired |
| US5909779A | Oil-based drilling fluids suitable for drilling in the presence of acidic gases | Emerging Cross-Sectional Technologies | 40 | Expired |
| US7262152B2 | Reversible emulsions stabilized by amphiphilic polymers and application to drilling fluid | Chemistry; Metallurgy | 39 | Expired |
| US6793814B2 | Clarifying tank | Performing Operations; Transporting | 39 | Expired |
| US5869433A | Non-fluorescing oil-based drilling fluid | Emerging Cross-Sectional Technologies | 36 | Expired |
| US5838589A | Intrinsically safe data acquisition system and apparatus | Physics | 32 | Expired |
| US6029755A | Conductive medium for openhole logging and logging while drilling | Emerging Cross-Sectional Technologies | 31 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.