- 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 47/02 - Determining slope or direction
Patent holdings for IPC class E21B 47/02
Total number of patents in this class: 702
10-year publication summary
|
88
|
34
|
24
|
18
|
19
|
24
|
19
|
18
|
27
|
11
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20879 |
142 |
| Schlumberger Canada Limited | 7293 |
63 |
| Schlumberger Technology Corporation | 10705 |
60 |
| Services Petroliers Schlumberger | 5784 |
54 |
| Schlumberger Technology B.v. | 5166 |
42 |
| Baker Hughes Incorporated | 5252 |
39 |
| Prad Research and Development Limited | 2693 |
33 |
| Schlumberger Holdings Limited | 2831 |
31 |
| Merlin Technology, Inc. | 161 |
15 |
| Motive Drilling Technologies, Inc. | 103 |
15 |
| Geoquest Systems B.V. | 744 |
10 |
| globalTech Corporation Pty Ltd | 41 |
10 |
| ConocoPhillips Company | 1673 |
8 |
| Saudi Arabian Oil Company | 13091 |
8 |
| Baker Hughes Oilfield Operations, LLC | 2297 |
8 |
| Landmark Graphics Corporation | 1526 |
7 |
| Smith International, Inc. | 718 |
7 |
| Reflex Instruments Asia Pacific Pty Ltd | 86 |
7 |
| Gyrodata, Incorporated | 87 |
5 |
| Shell Internationale Research Maatschappij B.V. | 3542 |
4 |
| Other owners | 134 |