- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining 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: 2026
10-year publication summary
|
162
|
214
|
248
|
167
|
177
|
183
|
169
|
131
|
120
|
45
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20165 |
402 |
| M-I L.L.C. | 893 |
131 |
| Saudi Arabian Oil Company | 11322 |
86 |
| Schlumberger Technology Corporation | 9690 |
77 |
| National Oilwell Varco, L.P. | 1604 |
60 |
| Schlumberger Canada Limited | 6913 |
48 |
| Schlumberger Technology B.v. | 4951 |
37 |
| Services Petroliers Schlumberger | 5426 |
36 |
| Recover Energy Services Inc. | 52 |
35 |
| Aramco Services Company | 3504 |
29 |
| Cubility AS | 35 |
22 |
| CURTIS, Philip, Anthony | 497 |
20 |
| Schlumberger Holdings Limited | 2947 |
18 |
| Chevron U.S.A. Inc. | 3774 |
18 |
| Nabors Drilling Technologies USA, Inc. | 533 |
18 |
| Baker Hughes Incorporated | 5689 |
16 |
| Prad Research and Development Limited | 2696 |
15 |
| Canadian Energy Services LP | 67 |
13 |
| Baker Hughes, a GE Company, LLC | 2171 |
13 |
| S.p.c.m. SA | 308 |
12 |
| Other owners | 920 |