- 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 12/02 - Wear indicators
Patent holdings for IPC class E21B 12/02
Total number of patents in this class: 260
10-year publication summary
|
17
|
19
|
11
|
11
|
19
|
15
|
24
|
11
|
5
|
10
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20977 |
38 |
| Saudi Arabian Oil Company | 13428 |
25 |
| Landmark Graphics Corporation | 1523 |
22 |
| Baker Hughes Incorporated | 5243 |
20 |
| Baker Hughes Holdings LLC | 2999 |
16 |
| Schlumberger Technology Corporation | 10914 |
10 |
| Aramco Services Company | 4039 |
8 |
| National Oilwell Varco, L.P. | 1690 |
8 |
| Schlumberger Canada Limited | 7373 |
7 |
| Baker Hughes, a GE Company, LLC | 2109 |
7 |
| Services Petroliers Schlumberger | 5835 |
6 |
| Schlumberger Technology B.v. | 5189 |
5 |
| Element Six (UK) Limited | 218 |
5 |
| Baker Hughes Oilfield Operations, LLC | 2334 |
4 |
| Taurex Drill Bits LLC | 15 |
4 |
| Wear Detection Technologies Pty Ltd | 7 |
4 |
| Schlumberger Holdings Limited | 2800 |
3 |
| Caterpillar Inc. | 9644 |
3 |
| Smith International, Inc. | 716 |
3 |
| National Oilwell DHT, L.P. | 123 |
3 |
| Other owners | 59 |