- 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: 1452
10-year publication summary
|
219
|
220
|
196
|
161
|
73
|
28
|
17
|
13
|
11
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21021 |
282 |
| Schlumberger Technology Corporation | 11023 |
80 |
| Baker Hughes, a GE Company, LLC | 2107 |
80 |
| Weatherford Technology Holdings, LLC | 2034 |
63 |
| Baker Hughes Holdings LLC | 3005 |
58 |
| Baker Hughes Incorporated | 5179 |
56 |
| Thru Tubing Solutions, Inc. | 381 |
28 |
| Saudi Arabian Oil Company | 13622 |
26 |
| Wells Fargo Bank, National Association | 4079 |
22 |
| Schlumberger Canada Limited | 7418 |
20 |
| Cameron International Corporation | 1351 |
19 |
| Schlumberger Technology B.v. | 5217 |
17 |
| Services Petroliers Schlumberger | 5874 |
17 |
| Innovex Downhole Solutions, LLC | 147 |
17 |
| ExxonMobil Upstream Research Company | 2380 |
14 |
| Tejas Research & Engineering, LLC | 26 |
14 |
| The Wellboss Company, LLC | 108 |
13 |
| NCS Multistage Inc. | 179 |
12 |
| OneSubsea IP UK Limited | 424 |
11 |
| Packers Plus Energy Services Inc. | 123 |
11 |
| Other owners | 592 |