- 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 12/02 - Wear indicators
Patent holdings for IPC class E21B 12/02
Total number of patents in this class: 244
10-year publication summary
25
|
20
|
23
|
12
|
14
|
19
|
19
|
25
|
10
|
2
|
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 |
34 |
Saudi Arabian Oil Company | 11322 |
24 |
Baker Hughes Incorporated | 5689 |
22 |
Landmark Graphics Corporation | 1526 |
21 |
Baker Hughes Holdings LLC | 3060 |
16 |
Aramco Services Company | 3504 |
8 |
National Oilwell Varco, L.P. | 1604 |
7 |
Baker Hughes, a GE Company, LLC | 2171 |
7 |
Schlumberger Technology Corporation | 9690 |
6 |
Schlumberger Canada Limited | 6913 |
6 |
Element Six (UK) Limited | 178 |
6 |
Schlumberger Technology B.v. | 4951 |
5 |
Services Petroliers Schlumberger | 5426 |
5 |
Schlumberger Holdings Limited | 2947 |
4 |
Smith International, Inc. | 761 |
4 |
Taurex Drill Bits LLC | 15 |
4 |
Caterpillar Inc. | 8877 |
3 |
National Oilwell DHT, L.P. | 159 |
3 |
Prad Research and Development Limited | 2696 |
3 |
The Royal Institution for The Advancement of Learning / McGill University | 622 |
3 |
Other owners | 53 |