- 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: 2538
10-year publication summary
|
205
|
180
|
140
|
132
|
136
|
103
|
97
|
65
|
71
|
47
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 13155 |
149 |
| Halliburton Energy Services, Inc. | 20891 |
147 |
| Schlumberger Technology Corporation | 10717 |
130 |
| Schlumberger Canada Limited | 7296 |
96 |
| Baker Hughes Incorporated | 5247 |
85 |
| Services Petroliers Schlumberger | 5788 |
75 |
| ExxonMobil Upstream Research Company | 2397 |
73 |
| Aramco Services Company | 3969 |
68 |
| Landmark Graphics Corporation | 1526 |
64 |
| Chevron U.S.A. Inc. | 3955 |
60 |
| Schlumberger Technology B.v. | 5168 |
53 |
| Baker Hughes Holdings LLC | 3007 |
45 |
| Prad Research and Development Limited | 2693 |
42 |
| Schlumberger Holdings Limited | 2828 |
39 |
| ConocoPhillips Company | 1673 |
38 |
| Baker Hughes, a GE Company, LLC | 2112 |
25 |
| Shell Internationale Research Maatschappij B.V. | 3540 |
22 |
| Harris Corporation | 1433 |
22 |
| M-I L.L.C. | 809 |
20 |
| Geoquest Systems B.V. | 746 |
19 |
| Other owners | 1266 |