- 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 43/30 - Specific pattern of wells, e.g. optimizing the spacing of wells
Patent holdings for IPC class E21B 43/30
Total number of patents in this class: 856
10-year publication summary
|
94
|
77
|
65
|
66
|
70
|
59
|
81
|
55
|
34
|
17
|
| 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 |
52 |
| Saudi Arabian Oil Company | 11322 |
52 |
| ConocoPhillips Company | 1657 |
49 |
| Cenovus Energy Inc. | 321 |
30 |
| Landmark Graphics Corporation | 1526 |
26 |
| SunCor Energy Inc. | 838 |
26 |
| Schlumberger Technology Corporation | 9690 |
24 |
| ExxonMobil Upstream Research Company | 2525 |
22 |
| Schlumberger Canada Limited | 6913 |
20 |
| Shell Internationale Research Maatschappij B.V. | 3792 |
20 |
| Aramco Services Company | 3504 |
16 |
| Eavor Technologies Inc. | 74 |
16 |
| Nexen Energy ULC | 43 |
14 |
| Shell Oil Company | 2196 |
13 |
| Chevron U.S.A. Inc. | 3774 |
12 |
| Services Petroliers Schlumberger | 5426 |
11 |
| Siemens AG | 24990 |
10 |
| Imperial Oil Resources Limited | 182 |
10 |
| Harris Corporation | 1591 |
9 |
| China University of Petroleum (East China) | 319 |
9 |
| Other owners | 415 |