- 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: 262
10-year publication summary
|
19
|
11
|
11
|
19
|
15
|
24
|
11
|
5
|
12
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21169 |
39 |
| Saudi Arabian Oil Company | 13943 |
25 |
| Landmark Graphics Corporation | 1508 |
22 |
| Baker Hughes Incorporated | 5045 |
19 |
| Baker Hughes Holdings LLC | 2983 |
16 |
| Schlumberger Technology Corporation | 11471 |
11 |
| Aramco Services Company | 4162 |
8 |
| National Oilwell Varco, L.P. | 1700 |
8 |
| Schlumberger Canada Limited | 7550 |
7 |
| Baker Hughes, a GE Company, LLC | 2101 |
7 |
| Services Petroliers Schlumberger | 5976 |
6 |
| Schlumberger Technology B.v. | 5270 |
5 |
| Element Six (UK) Limited | 225 |
5 |
| Baker Hughes Oilfield Operations, LLC | 2436 |
4 |
| Taurex Drill Bits LLC | 16 |
4 |
| Wear Detection Technologies Pty Ltd | 8 |
4 |
| Schlumberger Holdings Limited | 2740 |
3 |
| Caterpillar Inc. | 10118 |
3 |
| Smith International, Inc. | 700 |
3 |
| National Oilwell DHT, L.P. | 120 |
3 |
| Other owners | 60 |