- 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: 783
10-year publication summary
|
65
|
47
|
46
|
54
|
50
|
44
|
24
|
18
|
17
|
16
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21019 |
137 |
| Schlumberger Technology Corporation | 10976 |
53 |
| Saudi Arabian Oil Company | 13540 |
41 |
| Baker Hughes Incorporated | 5230 |
35 |
| Schlumberger Canada Limited | 7408 |
32 |
| Geodynamics, Inc. | 195 |
27 |
| Hunting Titan, Inc. | 247 |
26 |
| Services Petroliers Schlumberger | 5857 |
24 |
| Thru Tubing Solutions, Inc. | 381 |
24 |
| Schlumberger Technology B.v. | 5206 |
23 |
| ExxonMobil Upstream Research Company | 2384 |
18 |
| Baker Hughes Holdings LLC | 3009 |
17 |
| Schlumberger Holdings Limited | 2795 |
16 |
| Prad Research and Development Limited | 2688 |
15 |
| Foro Energy, Inc. | 106 |
14 |
| Owen Oil Tools LP | 88 |
11 |
| Wells Fargo Bank, National Association | 4032 |
11 |
| Aramco Services Company | 4068 |
9 |
| Robertson Intellectual Properties, LLC | 92 |
9 |
| Downing Wellhead Equipment, LLC | 50 |
9 |
| Other owners | 232 |