- 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: 264
10-year publication summary
|
23
|
12
|
14
|
19
|
19
|
26
|
14
|
5
|
13
|
7
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21294 |
40 |
| Saudi Arabian Oil Company | 14014 |
25 |
| Landmark Graphics Corporation | 1508 |
22 |
| Baker Hughes Holdings LLC | 2988 |
16 |
| Baker Hughes Incorporated | 4962 |
15 |
| Schlumberger Technology Corporation | 11656 |
12 |
| Schlumberger Canada Limited | 7599 |
8 |
| Aramco Services Company | 4163 |
8 |
| National Oilwell Varco, L.P. | 1697 |
8 |
| Baker Hughes, a GE Company, LLC | 2107 |
7 |
| Services Petroliers Schlumberger | 6004 |
6 |
| Baker Hughes Oilfield Operations, LLC | 2516 |
6 |
| Schlumberger Technology B.v. | 5284 |
5 |
| Element Six (UK) Limited | 227 |
5 |
| Taurex Drill Bits LLC | 16 |
4 |
| Wear Detection Technologies Pty Ltd | 9 |
4 |
| Schlumberger Holdings Limited | 2712 |
3 |
| Caterpillar Inc. | 10265 |
3 |
| Smith International, Inc. | 697 |
3 |
| National Oilwell DHT, L.P. | 120 |
3 |
| Other owners | 61 |