- 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 34/08 - Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
Patent holdings for IPC class E21B 34/08
Total number of patents in this class: 1384
10-year publication summary
|
79
|
76
|
81
|
91
|
108
|
121
|
146
|
97
|
72
|
48
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20901 |
353 |
| Schlumberger Technology Corporation | 10727 |
66 |
| Baker Hughes Oilfield Operations, LLC | 2305 |
60 |
| Saudi Arabian Oil Company | 13185 |
59 |
| Baker Hughes Incorporated | 5241 |
53 |
| Weatherford Technology Holdings, LLC | 2023 |
44 |
| Schlumberger Canada Limited | 7296 |
41 |
| Schlumberger Technology B.v. | 5165 |
36 |
| Services Petroliers Schlumberger | 5787 |
35 |
| Statoil Petroleum AS | 517 |
20 |
| Baker Hughes, a GE Company, LLC | 2112 |
20 |
| Schlumberger Holdings Limited | 2822 |
17 |
| Prad Research and Development Limited | 2693 |
17 |
| Swellfix UK Limited | 52 |
17 |
| Flowco Production Solutions, LLC | 68 |
16 |
| Baker Hughes Holdings LLC | 3006 |
15 |
| Floway Innovations Inc. | 14 |
14 |
| ExxonMobil Upstream Research Company | 2397 |
13 |
| Aramco Services Company | 3976 |
12 |
| BJ Energy Solutions, LLC (formerly TES Asset Acquisition, LLC) | 213 |
12 |
| Other owners | 464 |