- 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 49/08 - Obtaining fluid samples or testing fluids, in boreholes or wells
Patent holdings for IPC class E21B 49/08
Total number of patents in this class: 4297
10-year publication summary
|
316
|
314
|
340
|
233
|
258
|
276
|
228
|
255
|
222
|
150
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20891 |
891 |
| Schlumberger Technology Corporation | 10717 |
616 |
| Saudi Arabian Oil Company | 13155 |
349 |
| Schlumberger Canada Limited | 7296 |
276 |
| Services Petroliers Schlumberger | 5788 |
255 |
| Schlumberger Technology B.v. | 5168 |
242 |
| Schlumberger Holdings Limited | 2828 |
142 |
| Prad Research and Development Limited | 2693 |
134 |
| Baker Hughes Incorporated | 5247 |
131 |
| Baker Hughes Oilfield Operations, LLC | 2301 |
71 |
| Baker Hughes, a GE Company, LLC | 2112 |
67 |
| Aramco Services Company | 3969 |
59 |
| Landmark Graphics Corporation | 1526 |
34 |
| ConocoPhillips Company | 1673 |
34 |
| ExxonMobil Upstream Research Company | 2397 |
27 |
| Chevron U.S.A. Inc. | 3955 |
25 |
| Weatherford Technology Holdings, LLC | 2023 |
16 |
| Resman AS | 74 |
15 |
| Southwest Petroleum University | 470 |
15 |
| Baker Hughes Holdings LLC | 3007 |
13 |
| Other owners | 885 |