- 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: 2161
10-year publication summary
|
214
|
248
|
167
|
177
|
184
|
170
|
136
|
136
|
133
|
54
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20684 |
441 |
| M-I L.L.C. | 820 |
124 |
| Saudi Arabian Oil Company | 12785 |
107 |
| Schlumberger Technology Corporation | 10591 |
101 |
| National Oilwell Varco, L.P. | 1640 |
61 |
| Schlumberger Canada Limited | 7201 |
56 |
| Schlumberger Technology B.v. | 5138 |
43 |
| Services Petroliers Schlumberger | 5739 |
43 |
| Recover Energy Services Inc. | 51 |
35 |
| Aramco Services Company | 3894 |
32 |
| Cubility AS | 39 |
22 |
| CURTIS, Philip, Anthony | 444 |
19 |
| Chevron U.S.A. Inc. | 3912 |
18 |
| Schlumberger Holdings Limited | 2847 |
17 |
| Nabors Drilling Technologies USA, Inc. | 556 |
17 |
| Baker Hughes Incorporated | 5301 |
16 |
| Canadian Energy Services LP | 72 |
15 |
| Prad Research and Development Limited | 2695 |
15 |
| Baker Hughes, a GE Company, LLC | 2115 |
13 |
| Black Diamond Oilfield Rentals LLC | 66 |
12 |
| Other owners | 954 |