- 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: 266
10-year publication summary
|
23
|
12
|
14
|
19
|
19
|
26
|
14
|
5
|
13
|
11
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21296 |
39 |
| Saudi Arabian Oil Company | 14398 |
25 |
| Landmark Graphics Corporation | 1485 |
22 |
| Baker Hughes Holdings LLC | 3018 |
16 |
| Baker Hughes Incorporated | 4865 |
14 |
| Schlumberger Technology Corporation | 11981 |
13 |
| Schlumberger Canada Limited | 7621 |
8 |
| Aramco Services Company | 4190 |
8 |
| National Oilwell Varco, L.P. | 1698 |
8 |
| Baker Hughes Oilfield Operations, LLC | 2558 |
8 |
| Baker Hughes, a GE Company, LLC | 2019 |
7 |
| Services Petroliers Schlumberger | 6029 |
6 |
| Schlumberger Technology B.v. | 5292 |
5 |
| Element Six (UK) Limited | 238 |
5 |
| Taurex Drill Bits LLC | 17 |
5 |
| Wear Detection Technologies Pty Ltd | 9 |
4 |
| Schlumberger Holdings Limited | 2659 |
3 |
| Caterpillar Inc. | 10343 |
3 |
| Smith International, Inc. | 683 |
3 |
| National Oilwell DHT, L.P. | 117 |
3 |
| Other owners | 61 |