- 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 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
Patent holdings for IPC class E21B 34/10
Total number of patents in this class: 2397
10-year publication summary
|
187
|
164
|
189
|
182
|
173
|
152
|
160
|
142
|
117
|
105
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20946 |
517 |
| Baker Hughes Oilfield Operations, LLC | 2322 |
149 |
| Schlumberger Technology Corporation | 10881 |
133 |
| Baker Hughes Incorporated | 5248 |
132 |
| Weatherford Technology Holdings, LLC | 2029 |
111 |
| Schlumberger Canada Limited | 7366 |
74 |
| Baker Hughes, a GE Company, LLC | 2110 |
72 |
| Schlumberger Technology B.v. | 5183 |
65 |
| Services Petroliers Schlumberger | 5828 |
65 |
| Saudi Arabian Oil Company | 13372 |
50 |
| Baker Hughes Holdings LLC | 3001 |
29 |
| NCS Multistage Inc. | 178 |
25 |
| Petroleum Technology Company AS | 98 |
22 |
| Tejas Research & Engineering, LLC | 26 |
22 |
| ExxonMobil Upstream Research Company | 2392 |
21 |
| Halliburton Manufacturing and Services Limited | 58 |
21 |
| Thru Tubing Solutions, Inc. | 379 |
21 |
| Weatherford U.K. Limited | 71 |
21 |
| Innovex Downhole Solutions, LLC | 146 |
19 |
| Packers Plus Energy Services Inc. | 122 |
15 |
| Other owners | 813 |