- 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 43/14 - Obtaining from a multiple-zone well
Patent holdings for IPC class E21B 43/14
Total number of patents in this class: 1203
10-year publication summary
|
108
|
95
|
105
|
69
|
96
|
83
|
44
|
42
|
43
|
11
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21242 |
261 |
| Saudi Arabian Oil Company | 13949 |
92 |
| Schlumberger Technology Corporation | 11549 |
85 |
| Schlumberger Canada Limited | 7571 |
40 |
| ExxonMobil Upstream Research Company | 2332 |
35 |
| Aramco Services Company | 4162 |
32 |
| Services Petroliers Schlumberger | 5981 |
32 |
| Schlumberger Technology B.v. | 5270 |
29 |
| Baker Hughes Holdings LLC | 2994 |
27 |
| Baker Hughes, a GE Company, LLC | 2092 |
26 |
| Baker Hughes Incorporated | 5033 |
25 |
| Weatherford Technology Holdings, LLC | 2074 |
19 |
| Chevron U.S.A. Inc. | 4103 |
18 |
| Cenovus Energy Inc. | 421 |
18 |
| ConocoPhillips Company | 1696 |
18 |
| Schlumberger Holdings Limited | 2730 |
15 |
| Prad Research and Development Limited | 2679 |
15 |
| Thru Tubing Solutions, Inc. | 402 |
15 |
| NCS Multistage Inc. | 173 |
14 |
| Baker Hughes Oilfield Operations, LLC | 2472 |
14 |
| Other owners | 373 |