- 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 34/12 - Valve arrangements for boreholes or wells in wells operated by movement of casings or tubings
Patent holdings for IPC class E21B 34/12
Total number of patents in this class: 476
10-year publication summary
|
75
|
80
|
31
|
39
|
39
|
30
|
23
|
18
|
13
|
7
|
| 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 |
95 |
| Baker Hughes Incorporated | 5689 |
46 |
| Weatherford Technology Holdings, LLC | 2135 |
27 |
| Schlumberger Technology Corporation | 9690 |
16 |
| Baker Hughes Holdings LLC | 3060 |
12 |
| Baker Hughes, a GE Company, LLC | 2171 |
11 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
10 |
| NCS Multistage Inc. | 172 |
9 |
| Packers Plus Energy Services Inc. | 120 |
9 |
| Saudi Arabian Oil Company | 11322 |
9 |
| Thru Tubing Solutions, Inc. | 361 |
9 |
| Schlumberger Canada Limited | 6913 |
8 |
| Schlumberger Technology B.v. | 4951 |
8 |
| Services Petroliers Schlumberger | 5426 |
8 |
| Schlumberger Holdings Limited | 2947 |
6 |
| ExxonMobil Upstream Research Company | 2525 |
6 |
| Prad Research and Development Limited | 2696 |
6 |
| Tejas Research & Engineering, LLC | 26 |
6 |
| Geodynamics, Inc. | 203 |
5 |
| Rotojar Innovations Limited | 29 |
5 |
| Other owners | 165 |