- 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 47/09 - Locating or determining the position of objects in boreholes or wellsIdentifying the free or blocked portions of pipes
Patent holdings for IPC class E21B 47/09
Total number of patents in this class: 1773
10-year publication summary
|
224
|
164
|
197
|
153
|
110
|
113
|
86
|
64
|
58
|
27
|
| 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 |
439 |
| Schlumberger Technology Corporation | 10641 |
127 |
| Saudi Arabian Oil Company | 12891 |
94 |
| Baker Hughes Incorporated | 5281 |
75 |
| Schlumberger Canada Limited | 7244 |
64 |
| Services Petroliers Schlumberger | 5763 |
56 |
| Schlumberger Technology B.v. | 5154 |
52 |
| Schlumberger Holdings Limited | 2840 |
30 |
| Baker Hughes, a GE Company, LLC | 2114 |
30 |
| Motive Drilling Technologies, Inc. | 102 |
29 |
| Prad Research and Development Limited | 2693 |
28 |
| Landmark Graphics Corporation | 1522 |
24 |
| Weatherford Technology Holdings, LLC | 2012 |
24 |
| ExxonMobil Upstream Research Company | 2411 |
20 |
| Baker Hughes Oilfield Operations, LLC | 2273 |
20 |
| Baker Hughes Holdings LLC | 3006 |
18 |
| Aramco Services Company | 3921 |
17 |
| ConocoPhillips Company | 1676 |
15 |
| CARBO Ceramics Inc. | 237 |
13 |
| Intelligent Wellhead Systems Inc. | 82 |
13 |
| Other owners | 585 |