Dennis K. Clapper
32Patents
15h-index
35Co-inventors
81Inventor score
Filing activity: May 10, 1984 → Jun 28, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6790812B2 | Acid soluble, high fluid loss pill for lost circulation | Emerging Cross-Sectional Technologies | 99 | Expired |
| US7271131B2 | Fluid loss control and sealing agent for drilling depleted sand formations | Chemistry; Metallurgy | 54 | Expired |
| US8627902B2 | Estimating drill cutting origination depth using marking agents | Fixed Constructions | 39 | Active |
| US6703351B2 | Water-based drilling fluids using latex additives | Chemistry; Metallurgy | 39 | Expired |
| US4941981A | Modified non-polluting liquid phase shale swelling inhibition drilling fluid | Emerging Cross-Sectional Technologies | 38 | Expired |
| US4830765A | Modified non-polluting liquid phase shale swelling inhibition drilling fluid and method of using same | Emerging Cross-Sectional Technologies | 37 | Expired |
| US6204224A | Polyalkyl methacrylate copolymers for rheological modification and filtration control for ester and synthetic based drilling fluids | Chemistry; Metallurgy | 37 | Expired |
| US5837655A | Purified paraffins as lubricants, rate of penetration enhancers, and spotting fluid additives for water-based drilling fluids | Emerging Cross-Sectional Technologies | 36 | Expired |
| US5057234A | Non-hydrocarbon invert emulsions for use in well drilling operations | Chemistry; Metallurgy | 36 | Expired |
| US4963273A | Modified non-polluting liquid phase shale swelling inhibition drilling fluid and method of using same | Emerging Cross-Sectional Technologies | 32 | Expired |
| US6635604B1 | Low molecular weight water soluble organic compounds as crystallization point suppressants in brines | Chemistry; Metallurgy | 31 | Expired |
| US6080704A | Glycols as gas hydrate inhibitors in drilling, drill-in, and completion fluids | Chemistry; Metallurgy | 29 | Expired |
| US5141920A | Hydrocarbon invert emulsions for use in well drilling operations | Chemistry; Metallurgy | 29 | Expired |
| US4575428A | Invert emulsion drilling fluid comprising oligamide composition | Emerging Cross-Sectional Technologies | 19 | Expired |
| US4663076A | Invert emulsion drilling fluid comprising oligamide composition | Emerging Cross-Sectional Technologies | 15 | Expired |
| US6165945A | Blends of glycol derivatives as gas hydrate inhibitors in water base drilling, drill-in, and completion fluids | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5919738A | Fluids for use in drilling and completion operations comprising water insoluble colloidal complexes for improved rheology and filtration control | Chemistry; Metallurgy | 10 | Expired |
| US4735732A | Filtration control additive for invert emulsion drilling fluids and method of preparation | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4728444A | Filtration control additive for invert emulsion drilling fluids and method of preparation | Emerging Cross-Sectional Technologies | 7 | Expired |
| US7651980B2 | High temperature filtration control using water based drilling fluid systems comprising water soluble polymers | Chemistry; Metallurgy | 7 | Active |
| US6194216A | Method for determination of amine-based additives in drilling fluid filtrates | Emerging Cross-Sectional Technologies | 5 | Expired |
| US7393813B2 | Water-based drilling fluids using latex additives | Chemistry; Metallurgy | 4 | Expired |
| US8053394B2 | Drilling fluids with redispersible polymer powders | Chemistry; Metallurgy | 2 | Active |
| US10221636B2 | Polymer-modified asphalt for drilling fluid applications | Chemistry; Metallurgy | 2 | Active |
| US7749943B2 | Method and drilling fluid systems and lost circulation pills adapted to maintain the particle size distribution of component latex particles before and after freezing of the latex particles in the presence of water | Chemistry; Metallurgy | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.