- 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: 486
10-year publication summary
|
42
|
36
|
32
|
37
|
35
|
34
|
27
|
23
|
18
|
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. | 20769 |
97 |
| Saudi Arabian Oil Company | 12891 |
49 |
| Schlumberger Technology Corporation | 10641 |
43 |
| Baker Hughes Incorporated | 5281 |
26 |
| Schlumberger Canada Limited | 7244 |
21 |
| Schlumberger Technology B.v. | 5154 |
18 |
| Services Petroliers Schlumberger | 5763 |
18 |
| Schlumberger Holdings Limited | 2840 |
16 |
| Prad Research and Development Limited | 2693 |
16 |
| Landmark Graphics Corporation | 1522 |
10 |
| Aramco Services Company | 3921 |
10 |
| Reflex Instruments Asia Pacific Pty Ltd | 86 |
8 |
| Baker Hughes, a GE Company, LLC | 2114 |
8 |
| Expro North Sea Limited | 228 |
5 |
| Probe Technology Services, Inc. | 36 |
5 |
| Geonomic Technologies Inc. | 9 |
5 |
| Smith International, Inc. | 720 |
4 |
| BP Corporation North America Inc. | 743 |
4 |
| e.V. Offshore Limited | 62 |
4 |
| Baker Hughes Holdings LLC | 3006 |
4 |
| Other owners | 115 |