- 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 47/08 - Measuring diameters or related dimensions at the borehole
Patent holdings for IPC class E21B 47/08
Total number of patents in this class: 498
10-year publication summary
|
31
|
31
|
33
|
31
|
31
|
26
|
22
|
17
|
21
|
3
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21098 |
98 |
| Saudi Arabian Oil Company | 13857 |
51 |
| Schlumberger Technology Corporation | 11274 |
46 |
| Baker Hughes Incorporated | 5109 |
24 |
| Schlumberger Canada Limited | 7487 |
21 |
| Schlumberger Technology B.v. | 5245 |
18 |
| Services Petroliers Schlumberger | 5923 |
18 |
| Schlumberger Holdings Limited | 2754 |
16 |
| Prad Research and Development Limited | 2684 |
16 |
| Landmark Graphics Corporation | 1510 |
12 |
| Aramco Services Company | 4157 |
11 |
| Reflex Instruments Asia Pacific Pty Ltd | 87 |
9 |
| Baker Hughes, a GE Company, LLC | 2105 |
8 |
| Geonomic Technologies Inc. | 12 |
6 |
| Expro North Sea Limited | 237 |
5 |
| Probe Technology Services, Inc. | 35 |
5 |
| Smith International, Inc. | 704 |
4 |
| BP Corporation North America Inc. | 742 |
4 |
| e.V. Offshore Limited | 65 |
4 |
| Baker Hughes Holdings LLC | 2986 |
4 |
| Other owners | 118 |