- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining 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
|
192
|
205
|
180
|
140
|
132
|
135
|
102
|
95
|
60
|
26
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20165 |
165 |
| Saudi Arabian Oil Company | 11322 |
139 |
| Schlumberger Technology Corporation | 9690 |
117 |
| Baker Hughes Incorporated | 5689 |
93 |
| Schlumberger Canada Limited | 6913 |
87 |
| ExxonMobil Upstream Research Company | 2525 |
79 |
| Services Petroliers Schlumberger | 5426 |
66 |
| Landmark Graphics Corporation | 1526 |
65 |
| Chevron U.S.A. Inc. | 3774 |
61 |
| Aramco Services Company | 3504 |
58 |
| Schlumberger Technology B.v. | 4951 |
53 |
| Baker Hughes Holdings LLC | 3060 |
48 |
| Prad Research and Development Limited | 2696 |
42 |
| Schlumberger Holdings Limited | 2947 |
40 |
| ConocoPhillips Company | 1657 |
35 |
| Baker Hughes, a GE Company, LLC | 2171 |
27 |
| Harris Corporation | 1591 |
25 |
| Shell Internationale Research Maatschappij B.V. | 3792 |
24 |
| M-I L.L.C. | 893 |
22 |
| Shell Oil Company | 2196 |
17 |
| Other owners | 1275 |