- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 47/007 - Measuring stresses in a pipe string or casing
Patent holdings for IPC class E21B 47/007
Total number of patents in this class: 387
10-year publication summary
|
35
|
22
|
12
|
20
|
29
|
32
|
64
|
51
|
34
|
7
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20165 |
66 |
| Schlumberger Technology Corporation | 9690 |
31 |
| Landmark Graphics Corporation | 1526 |
25 |
| Saudi Arabian Oil Company | 11322 |
21 |
| Baker Hughes Incorporated | 5689 |
14 |
| Schlumberger Canada Limited | 6913 |
12 |
| Services Petroliers Schlumberger | 5426 |
11 |
| Schlumberger Technology B.v. | 4951 |
10 |
| Schlumberger Holdings Limited | 2947 |
10 |
| Chevron U.S.A. Inc. | 3774 |
10 |
| Prad Research and Development Limited | 2696 |
10 |
| Weatherford Technology Holdings, LLC | 2135 |
6 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
6 |
| ConocoPhillips Company | 1657 |
5 |
| Hifi Engineering Inc. | 125 |
5 |
| Noetic Technologies Inc. | 126 |
5 |
| Aramco Services Company | 3504 |
4 |
| Impact Selector International, LLC | 117 |
4 |
| Innovative Pressure Testing, LLC | 16 |
4 |
| McCoy Global Inc. | 52 |
4 |
| Other owners | 124 |