- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining 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: 491
10-year publication summary
|
40
|
42
|
36
|
32
|
37
|
35
|
34
|
25
|
23
|
3
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20165 |
100 |
| Schlumberger Technology Corporation | 9690 |
43 |
| Saudi Arabian Oil Company | 11322 |
40 |
| Baker Hughes Incorporated | 5689 |
28 |
| Schlumberger Canada Limited | 6913 |
24 |
| Schlumberger Technology B.v. | 4951 |
21 |
| Services Petroliers Schlumberger | 5426 |
21 |
| Schlumberger Holdings Limited | 2947 |
19 |
| Prad Research and Development Limited | 2696 |
16 |
| Landmark Graphics Corporation | 1526 |
10 |
| Aramco Services Company | 3504 |
8 |
| Baker Hughes, a GE Company, LLC | 2171 |
8 |
| Reflex Instruments Asia Pacific Pty Ltd | 83 |
7 |
| BP Corporation North America Inc. | 776 |
5 |
| Gyrodata, Incorporated | 99 |
5 |
| Probe Technology Services, Inc. | 33 |
5 |
| Smith International, Inc. | 761 |
4 |
| e.V. Offshore Limited | 59 |
4 |
| Expro North Sea Limited | 215 |
4 |
| Geonomic Technologies Inc. | 7 |
4 |
| Other owners | 115 |