- 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: 1755
10-year publication summary
|
224
|
164
|
197
|
153
|
110
|
113
|
86
|
64
|
58
|
15
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20635 |
439 |
| Schlumberger Technology Corporation | 10512 |
125 |
| Saudi Arabian Oil Company | 12683 |
89 |
| Baker Hughes Incorporated | 5316 |
75 |
| Schlumberger Canada Limited | 7146 |
62 |
| Services Petroliers Schlumberger | 5705 |
56 |
| Schlumberger Technology B.v. | 5116 |
52 |
| Schlumberger Holdings Limited | 2852 |
30 |
| Baker Hughes, a GE Company, LLC | 2115 |
30 |
| Prad Research and Development Limited | 2696 |
28 |
| Motive Drilling Technologies, Inc. | 100 |
27 |
| Landmark Graphics Corporation | 1521 |
24 |
| Weatherford Technology Holdings, LLC | 2008 |
24 |
| ExxonMobil Upstream Research Company | 2414 |
20 |
| Baker Hughes Oilfield Operations, LLC | 2211 |
20 |
| Baker Hughes Holdings LLC | 3020 |
18 |
| Aramco Services Company | 3872 |
15 |
| ConocoPhillips Company | 1667 |
15 |
| CARBO Ceramics Inc. | 238 |
13 |
| Intelligent Wellhead Systems Inc. | 82 |
13 |
| Other owners | 580 |