- 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: 730
10-year publication summary
|
24
|
17
|
17
|
13
|
21
|
17
|
16
|
29
|
20
|
4
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21144 |
147 |
| Schlumberger Canada Limited | 7524 |
70 |
| Schlumberger Technology Corporation | 11349 |
63 |
| Services Petroliers Schlumberger | 5945 |
57 |
| Schlumberger Technology B.v. | 5259 |
45 |
| Baker Hughes Incorporated | 5088 |
39 |
| Prad Research and Development Limited | 2683 |
33 |
| Schlumberger Holdings Limited | 2753 |
31 |
| Merlin Technology, Inc. | 164 |
16 |
| Motive Drilling Technologies, Inc. | 103 |
15 |
| Geoquest Systems B.V. | 823 |
10 |
| Saudi Arabian Oil Company | 13904 |
9 |
| ConocoPhillips Company | 1699 |
8 |
| globalTech Corporation Pty Ltd | 30 |
8 |
| Baker Hughes Oilfield Operations, LLC | 2424 |
8 |
| Landmark Graphics Corporation | 1509 |
7 |
| Smith International, Inc. | 701 |
7 |
| Reflex Instruments Asia Pacific Pty Ltd | 88 |
7 |
| Imdex Technologies Pty Ltd | 85 |
5 |
| Shell Internationale Research Maatschappij B.V. | 3497 |
4 |
| Other owners | 141 |