- 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: 1800
10-year publication summary
|
175
|
150
|
168
|
137
|
99
|
100
|
76
|
59
|
57
|
45
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20964 |
444 |
| Schlumberger Technology Corporation | 10898 |
128 |
| Saudi Arabian Oil Company | 13409 |
98 |
| Baker Hughes Incorporated | 5246 |
75 |
| Schlumberger Canada Limited | 7369 |
65 |
| Services Petroliers Schlumberger | 5830 |
57 |
| Schlumberger Technology B.v. | 5184 |
52 |
| Schlumberger Holdings Limited | 2800 |
30 |
| Baker Hughes, a GE Company, LLC | 2109 |
30 |
| Motive Drilling Technologies, Inc. | 103 |
29 |
| Prad Research and Development Limited | 2691 |
28 |
| Landmark Graphics Corporation | 1524 |
24 |
| Weatherford Technology Holdings, LLC | 2028 |
24 |
| ExxonMobil Upstream Research Company | 2390 |
20 |
| Baker Hughes Oilfield Operations, LLC | 2331 |
20 |
| Aramco Services Company | 4033 |
18 |
| Baker Hughes Holdings LLC | 2999 |
18 |
| ConocoPhillips Company | 1677 |
16 |
| CARBO Ceramics Inc. | 236 |
13 |
| Intelligent Wellhead Systems Inc. | 79 |
13 |
| Other owners | 598 |