- 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: 2229
10-year publication summary
|
216
|
147
|
164
|
172
|
154
|
124
|
125
|
133
|
109
|
15
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21115 |
453 |
| Schlumberger Technology Corporation | 11298 |
120 |
| M-I L.L.C. | 784 |
118 |
| Saudi Arabian Oil Company | 13865 |
117 |
| Schlumberger Canada Limited | 7497 |
62 |
| National Oilwell Varco, L.P. | 1702 |
58 |
| Schlumberger Technology B.v. | 5251 |
49 |
| Services Petroliers Schlumberger | 5931 |
49 |
| Recover Energy Services Inc. | 51 |
35 |
| Aramco Services Company | 4156 |
34 |
| Cubility AS | 38 |
21 |
| Chevron U.S.A. Inc. | 4050 |
18 |
| Nabors Drilling Technologies USA, Inc. | 565 |
17 |
| CURTIS, Philip, Anthony | 363 |
17 |
| Schlumberger Holdings Limited | 2754 |
16 |
| Baker Hughes Incorporated | 5098 |
15 |
| Canadian Energy Services LP | 75 |
15 |
| Prad Research and Development Limited | 2684 |
15 |
| Baker Hughes Oilfield Operations, LLC | 2414 |
13 |
| Baker Hughes, a GE Company, LLC | 2105 |
13 |
| Other owners | 974 |