- 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: 2957
10-year publication summary
|
205
|
173
|
216
|
195
|
227
|
261
|
232
|
192
|
178
|
46
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21257 |
607 |
| Baker Hughes Oilfield Operations, LLC | 2480 |
176 |
| Schlumberger Technology Corporation | 11584 |
163 |
| Weatherford Technology Holdings, LLC | 2072 |
136 |
| Baker Hughes Incorporated | 5018 |
115 |
| Saudi Arabian Oil Company | 13956 |
102 |
| Schlumberger Canada Limited | 7588 |
70 |
| Baker Hughes, a GE Company, LLC | 2091 |
68 |
| NCS Multistage Inc. | 173 |
67 |
| Schlumberger Technology B.v. | 5282 |
58 |
| Services Petroliers Schlumberger | 5996 |
58 |
| Packers Plus Energy Services Inc. | 118 |
57 |
| Baker Hughes Holdings LLC | 2986 |
54 |
| SC Asset Corporation | 47 |
33 |
| Kobold Corp. | 42 |
27 |
| Cameron International Corporation | 1367 |
24 |
| Aramco Services Company | 4162 |
22 |
| Thru Tubing Solutions, Inc. | 403 |
22 |
| Innovex Downhole Solutions, LLC | 145 |
22 |
| Weatherford / Lamb, Inc. | 147 |
19 |
| Other owners | 1057 |