- 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 33/13 - Methods or devices for cementing, for plugging holes, crevices or the like
Patent holdings for IPC class E21B 33/13
Total number of patents in this class: 2598
10-year publication summary
|
273
|
208
|
177
|
165
|
187
|
135
|
93
|
89
|
101
|
53
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21296 |
666 |
| Schlumberger Technology Corporation | 11893 |
162 |
| Saudi Arabian Oil Company | 14329 |
139 |
| Schlumberger Canada Limited | 7627 |
103 |
| Schlumberger Technology B.v. | 5302 |
89 |
| Services Petroliers Schlumberger | 6038 |
88 |
| Thru Tubing Solutions, Inc. | 405 |
75 |
| Baker Hughes Incorporated | 4903 |
50 |
| ConocoPhillips Company | 1716 |
48 |
| Weatherford Technology Holdings, LLC | 2161 |
44 |
| Schlumberger Holdings Limited | 2683 |
43 |
| Baker Hughes Holdings LLC | 3015 |
43 |
| Prad Research and Development Limited | 2652 |
41 |
| Bisn Tec Ltd | 84 |
38 |
| Hydra Systems AS | 48 |
36 |
| Baker Hughes Oilfield Operations, LLC | 2551 |
25 |
| Baker Hughes, a GE Company, LLC | 2049 |
22 |
| Aramco Services Company | 4192 |
20 |
| ExxonMobil Upstream Research Company | 2291 |
17 |
| Statoil Petroleum AS | 468 |
17 |
| Other owners | 832 |