- 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 43/00 - Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
Patent holdings for IPC class E21B 43/00
Total number of patents in this class: 2532
10-year publication summary
|
149
|
120
|
116
|
114
|
93
|
85
|
65
|
73
|
69
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 13814 |
157 |
| Halliburton Energy Services, Inc. | 21117 |
139 |
| Schlumberger Technology Corporation | 11238 |
135 |
| Schlumberger Canada Limited | 7485 |
100 |
| Baker Hughes Incorporated | 5140 |
83 |
| Services Petroliers Schlumberger | 5916 |
77 |
| Aramco Services Company | 4147 |
73 |
| ExxonMobil Upstream Research Company | 2364 |
72 |
| Landmark Graphics Corporation | 1510 |
66 |
| Chevron U.S.A. Inc. | 4044 |
60 |
| Schlumberger Technology B.v. | 5239 |
52 |
| Prad Research and Development Limited | 2686 |
42 |
| Baker Hughes Holdings LLC | 2991 |
42 |
| ConocoPhillips Company | 1697 |
40 |
| Schlumberger Holdings Limited | 2757 |
38 |
| Baker Hughes, a GE Company, LLC | 2101 |
25 |
| Geoquest Systems B.V. | 812 |
22 |
| Harris Corporation | 1370 |
21 |
| Shell Internationale Research Maatschappij B.V. | 3517 |
20 |
| M-I L.L.C. | 798 |
18 |
| Other owners | 1250 |