- 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 34/00 - Valve arrangements for boreholes or wells
Patent holdings for IPC class E21B 34/00
Total number of patents in this class: 1473
10-year publication summary
|
205
|
227
|
232
|
209
|
178
|
89
|
35
|
20
|
12
|
5
|
| 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 |
285 |
| Schlumberger Technology Corporation | 9690 |
82 |
| Baker Hughes, a GE Company, LLC | 2171 |
80 |
| Weatherford Technology Holdings, LLC | 2135 |
68 |
| Baker Hughes Holdings LLC | 3060 |
59 |
| Baker Hughes Incorporated | 5689 |
58 |
| Thru Tubing Solutions, Inc. | 361 |
28 |
| Saudi Arabian Oil Company | 11322 |
26 |
| Wells Fargo Bank, National Association | 2945 |
22 |
| Schlumberger Canada Limited | 6913 |
20 |
| Innovex Downhole Solutions, Inc. | 182 |
20 |
| Cameron International Corporation | 1305 |
19 |
| Schlumberger Technology B.v. | 4951 |
17 |
| Services Petroliers Schlumberger | 5426 |
17 |
| ExxonMobil Upstream Research Company | 2525 |
14 |
| Tejas Research & Engineering, LLC | 26 |
14 |
| Packers Plus Energy Services Inc. | 120 |
13 |
| The Wellboss Company, LLC | 96 |
13 |
| FMC Technologies, Inc. | 603 |
11 |
| NCS Multistage Inc. | 172 |
11 |
| Other owners | 596 |