- 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 34/14 - Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
Patent holdings for IPC class E21B 34/14
Total number of patents in this class: 2928
10-year publication summary
|
162
|
146
|
184
|
171
|
192
|
223
|
194
|
169
|
147
|
20
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21151 |
590 |
| Baker Hughes Oilfield Operations, LLC | 2427 |
173 |
| Schlumberger Technology Corporation | 11423 |
162 |
| Weatherford Technology Holdings, LLC | 2039 |
132 |
| Baker Hughes Incorporated | 5075 |
115 |
| Saudi Arabian Oil Company | 13931 |
101 |
| Schlumberger Canada Limited | 7552 |
69 |
| NCS Multistage Inc. | 175 |
68 |
| Baker Hughes, a GE Company, LLC | 2102 |
68 |
| Schlumberger Technology B.v. | 5265 |
57 |
| Packers Plus Energy Services Inc. | 122 |
57 |
| Services Petroliers Schlumberger | 5969 |
57 |
| Baker Hughes Holdings LLC | 2979 |
54 |
| SC Asset Corporation | 47 |
33 |
| Kobold Corp. | 41 |
26 |
| Cameron International Corporation | 1361 |
24 |
| Aramco Services Company | 4167 |
22 |
| Thru Tubing Solutions, Inc. | 391 |
22 |
| Innovex Downhole Solutions, LLC | 146 |
22 |
| Weatherford / Lamb, Inc. | 150 |
19 |
| Other owners | 1057 |