- 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 47/008 - Monitoring of down-hole pump systems, e.g. for the detection of "pumped-off" conditions
Patent holdings for IPC class E21B 47/008
Total number of patents in this class: 658
10-year publication summary
|
27
|
21
|
20
|
51
|
60
|
58
|
58
|
52
|
61
|
22
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21320 |
112 |
| Schlumberger Technology Corporation | 11798 |
62 |
| Schlumberger Canada Limited | 7606 |
51 |
| Saudi Arabian Oil Company | 14207 |
47 |
| Services Petroliers Schlumberger | 6024 |
41 |
| Schlumberger Technology B.v. | 5298 |
30 |
| Baker Hughes Oilfield Operations, LLC | 2521 |
22 |
| BJ Energy Solutions, LLC (formerly TES Asset Acquisition, LLC) | 230 |
16 |
| Schlumberger Holdings Limited | 2702 |
15 |
| Weatherford Technology Holdings, LLC | 2154 |
15 |
| Prad Research and Development Limited | 2662 |
15 |
| Sensia LLC | 130 |
14 |
| Geoquest Systems B.V. | 871 |
11 |
| Baker Hughes Incorporated | 4940 |
10 |
| Aramco Services Company | 4188 |
10 |
| Schneider Electric Systems USA, Inc. | 441 |
10 |
| ExxonMobil Technology and Engineering Company | 1349 |
7 |
| Landmark Graphics Corporation | 1508 |
6 |
| ExxonMobil Upstream Research Company | 2306 |
6 |
| Chevron U.S.A. Inc. | 4134 |
3 |
| Other owners | 155 |