- 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 43/22 - Use of chemicals or bacterial activity
Patent holdings for IPC class E21B 43/22
Total number of patents in this class: 1693
10-year publication summary
|
284
|
167
|
111
|
49
|
88
|
58
|
48
|
31
|
20
|
3
|
| 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 |
343 |
| Schlumberger Technology Corporation | 9690 |
68 |
| Schlumberger Canada Limited | 6913 |
67 |
| Schlumberger Technology B.v. | 4951 |
59 |
| Services Petroliers Schlumberger | 5426 |
59 |
| Baker Hughes Incorporated | 5689 |
58 |
| Schlumberger Holdings Limited | 2947 |
50 |
| Prad Research and Development Limited | 2696 |
49 |
| M-I L.L.C. | 893 |
33 |
| Shell Oil Company | 2196 |
32 |
| Shell Internationale Research Maatschappij B.V. | 3792 |
31 |
| Saudi Arabian Oil Company | 11322 |
28 |
| Cenovus Energy Inc. | 321 |
27 |
| Chevron U.S.A. Inc. | 3774 |
26 |
| Imperial Oil Resources Limited | 182 |
23 |
| ConocoPhillips Company | 1657 |
21 |
| Flotek Chemistry, LLC | 120 |
20 |
| SunCor Energy Inc. | 838 |
19 |
| Board of Regents, The University of Texas System | 5370 |
18 |
| ExxonMobil Upstream Research Company | 2525 |
17 |
| Other owners | 645 |