- All sections
- E - Fixed constructions
- E21B - Earth or rock drillingobtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 43/16 - Enhanced recovery methods for obtaining hydrocarbons
Patent holdings for IPC class E21B 43/16
Total number of patents in this class: 3894
10-year publication summary
|
274
|
274
|
320
|
259
|
286
|
237
|
247
|
195
|
241
|
52
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21230 |
369 |
| Saudi Arabian Oil Company | 13948 |
361 |
| Schlumberger Technology Corporation | 11522 |
174 |
| Schlumberger Canada Limited | 7564 |
123 |
| Services Petroliers Schlumberger | 5979 |
101 |
| Chevron U.S.A. Inc. | 4094 |
90 |
| ConocoPhillips Company | 1692 |
85 |
| Schlumberger Technology B.v. | 5269 |
81 |
| Aramco Services Company | 4162 |
73 |
| ExxonMobil Upstream Research Company | 2334 |
69 |
| Baker Hughes Incorporated | 5038 |
54 |
| Baker Hughes Oilfield Operations, LLC | 2464 |
50 |
| Baker Hughes Holdings LLC | 2991 |
50 |
| Shell Internationale Research Maatschappij B.V. | 3456 |
49 |
| Shell Oil Company | 2091 |
44 |
| Prad Research and Development Limited | 2679 |
40 |
| Schlumberger Holdings Limited | 2733 |
39 |
| Landmark Graphics Corporation | 1509 |
38 |
| Cenovus Energy Inc. | 420 |
35 |
| Championx LLC | 614 |
33 |
| Other owners | 1936 |