- 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 43/14 - Obtaining from a multiple-zone well
Patent holdings for IPC class E21B 43/14
Total number of patents in this class: 1149
10-year publication summary
|
118
|
137
|
108
|
95
|
105
|
69
|
93
|
82
|
39
|
11
|
| 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 |
249 |
| Schlumberger Technology Corporation | 9690 |
81 |
| Saudi Arabian Oil Company | 11322 |
80 |
| Schlumberger Canada Limited | 6913 |
38 |
| ExxonMobil Upstream Research Company | 2525 |
35 |
| Services Petroliers Schlumberger | 5426 |
31 |
| Schlumberger Technology B.v. | 4951 |
30 |
| Baker Hughes Holdings LLC | 3060 |
29 |
| Aramco Services Company | 3504 |
28 |
| Baker Hughes, a GE Company, LLC | 2171 |
27 |
| Baker Hughes Incorporated | 5689 |
26 |
| Weatherford Technology Holdings, LLC | 2135 |
18 |
| ConocoPhillips Company | 1657 |
18 |
| Chevron U.S.A. Inc. | 3774 |
17 |
| Cenovus Energy Inc. | 321 |
17 |
| Schlumberger Holdings Limited | 2947 |
15 |
| NCS Multistage Inc. | 172 |
15 |
| Prad Research and Development Limited | 2696 |
15 |
| Thru Tubing Solutions, Inc. | 361 |
15 |
| Resman AS | 54 |
13 |
| Other owners | 352 |