- 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 47/09 - Locating or determining the position of objects in boreholes or wells; Identifying the free or blocked portions of pipes
Patent holdings for IPC class E21B 47/09
Total number of patents in this class: 1723
10-year publication summary
|
210
|
224
|
164
|
198
|
153
|
110
|
107
|
84
|
58
|
17
|
| 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 |
436 |
| Schlumberger Technology Corporation | 9690 |
122 |
| Saudi Arabian Oil Company | 11322 |
80 |
| Baker Hughes Incorporated | 5689 |
77 |
| Schlumberger Canada Limited | 6913 |
64 |
| Services Petroliers Schlumberger | 5426 |
56 |
| Schlumberger Technology B.v. | 4951 |
53 |
| Schlumberger Holdings Limited | 2947 |
31 |
| Baker Hughes, a GE Company, LLC | 2171 |
30 |
| Prad Research and Development Limited | 2696 |
28 |
| Landmark Graphics Corporation | 1526 |
24 |
| Weatherford Technology Holdings, LLC | 2135 |
24 |
| Motive Drilling Technologies, Inc. | 89 |
21 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
21 |
| ExxonMobil Upstream Research Company | 2525 |
20 |
| Baker Hughes Holdings LLC | 3060 |
18 |
| ConocoPhillips Company | 1657 |
15 |
| Cameron International Corporation | 1305 |
12 |
| CARBO Ceramics Inc. | 248 |
12 |
| Intelligent Wellhead Systems Inc. | 77 |
12 |
| Other owners | 567 |