- 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: 2203
10-year publication summary
|
184
|
216
|
147
|
164
|
172
|
154
|
123
|
124
|
133
|
106
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21078 |
450 |
| M-I L.L.C. | 806 |
120 |
| Saudi Arabian Oil Company | 13656 |
115 |
| Schlumberger Technology Corporation | 11054 |
110 |
| Schlumberger Canada Limited | 7432 |
59 |
| National Oilwell Varco, L.P. | 1699 |
57 |
| Schlumberger Technology B.v. | 5223 |
45 |
| Services Petroliers Schlumberger | 5884 |
45 |
| Recover Energy Services Inc. | 51 |
35 |
| Aramco Services Company | 4095 |
33 |
| Cubility AS | 38 |
21 |
| Chevron U.S.A. Inc. | 4018 |
18 |
| CURTIS, Philip, Anthony | 385 |
18 |
| Nabors Drilling Technologies USA, Inc. | 564 |
17 |
| Schlumberger Holdings Limited | 2790 |
16 |
| Baker Hughes Incorporated | 5175 |
16 |
| Canadian Energy Services LP | 74 |
15 |
| Prad Research and Development Limited | 2687 |
15 |
| Baker Hughes, a GE Company, LLC | 2106 |
13 |
| Black Diamond Oilfield Rentals LLC | 67 |
12 |
| Other owners | 973 |