- 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 43/11 - PerforatorsPermeators
Patent holdings for IPC class E21B 43/11
Total number of patents in this class: 797
10-year publication summary
|
55
|
56
|
71
|
62
|
53
|
34
|
23
|
20
|
28
|
7
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21217 |
137 |
| Schlumberger Technology Corporation | 11485 |
56 |
| Saudi Arabian Oil Company | 13953 |
40 |
| Schlumberger Canada Limited | 7558 |
35 |
| Baker Hughes Incorporated | 5041 |
35 |
| Geodynamics, Inc. | 195 |
27 |
| Services Petroliers Schlumberger | 5977 |
26 |
| Schlumberger Technology B.v. | 5267 |
25 |
| Thru Tubing Solutions, Inc. | 393 |
25 |
| Hunting Titan, Inc. | 234 |
23 |
| ExxonMobil Upstream Research Company | 2335 |
18 |
| Baker Hughes Holdings LLC | 2992 |
17 |
| Schlumberger Holdings Limited | 2735 |
16 |
| Prad Research and Development Limited | 2679 |
15 |
| Foro Energy, Inc. | 106 |
14 |
| Owen Oil Tools LP | 77 |
11 |
| Wells Fargo Bank, National Association | 4371 |
11 |
| Downing Wellhead Equipment, LLC | 52 |
10 |
| Aramco Services Company | 4162 |
9 |
| Robertson Intellectual Properties, LLC | 94 |
9 |
| Other owners | 238 |