- 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 21/06 - Arrangements for treating drilling fluids outside the borehole
Patent holdings for IPC class E21B 21/06
Total number of patents in this class: 2257
10-year publication summary
|
248
|
167
|
177
|
184
|
172
|
138
|
136
|
143
|
128
|
50
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21320 |
450 |
| Schlumberger Technology Corporation | 11798 |
133 |
| Saudi Arabian Oil Company | 14207 |
118 |
| M-I L.L.C. | 747 |
115 |
| Schlumberger Canada Limited | 7606 |
63 |
| National Oilwell Varco, L.P. | 1698 |
59 |
| Services Petroliers Schlumberger | 6024 |
51 |
| Schlumberger Technology B.v. | 5298 |
50 |
| Recover Energy Services Inc. | 51 |
35 |
| Aramco Services Company | 4188 |
34 |
| Chevron U.S.A. Inc. | 4134 |
19 |
| Baker Hughes Oilfield Operations, LLC | 2521 |
18 |
| Nabors Drilling Technologies USA, Inc. | 573 |
17 |
| Cubility AS | 33 |
16 |
| CURTIS, Philip, Anthony | 332 |
16 |
| Schlumberger Holdings Limited | 2702 |
15 |
| Baker Hughes Incorporated | 4940 |
15 |
| Canadian Energy Services LP | 74 |
15 |
| Prad Research and Development Limited | 2662 |
15 |
| Baker Hughes, a GE Company, LLC | 2057 |
13 |
| Other owners | 990 |