- 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 34/00 - Valve arrangements for boreholes or wells
Patent holdings for IPC class E21B 34/00
Total number of patents in this class: 1458
10-year publication summary
|
232
|
209
|
179
|
89
|
35
|
20
|
17
|
12
|
11
|
19
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21299 |
284 |
| Baker Hughes, a GE Company, LLC | 2022 |
80 |
| Schlumberger Technology Corporation | 11961 |
79 |
| Weatherford Technology Holdings, LLC | 2167 |
62 |
| Baker Hughes Holdings LLC | 3011 |
58 |
| Baker Hughes Incorporated | 4870 |
55 |
| Thru Tubing Solutions, Inc. | 407 |
29 |
| Saudi Arabian Oil Company | 14390 |
26 |
| Wells Fargo Bank, National Association | 4588 |
22 |
| Schlumberger Canada Limited | 7616 |
20 |
| Cameron International Corporation | 1367 |
19 |
| Schlumberger Technology B.v. | 5289 |
17 |
| Services Petroliers Schlumberger | 6024 |
17 |
| Innovex Downhole Solutions, LLC | 143 |
17 |
| ExxonMobil Upstream Research Company | 2284 |
14 |
| Tejas Research & Engineering, LLC | 28 |
14 |
| The Wellboss Company, LLC | 120 |
13 |
| NCS Multistage Inc. | 172 |
11 |
| OneSubsea IP UK Limited | 440 |
11 |
| Packers Plus Energy Services Inc. | 118 |
11 |
| Other owners | 599 |