- 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 43/30 - Specific pattern of wells, e.g. optimising the spacing of wells
Patent holdings for IPC class E21B 43/30
Total number of patents in this class: 875
10-year publication summary
77
|
65
|
66
|
71
|
59
|
81
|
54
|
36
|
47
|
15
|
2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Saudi Arabian Oil Company | 12833 |
60 |
Halliburton Energy Services, Inc. | 20730 |
51 |
ConocoPhillips Company | 1674 |
51 |
Cenovus Energy Inc. | 422 |
30 |
Schlumberger Technology Corporation | 10608 |
29 |
Landmark Graphics Corporation | 1521 |
26 |
Schlumberger Canada Limited | 7222 |
24 |
SunCor Energy Inc. | 733 |
24 |
Shell Internationale Research Maatschappij B.V. | 3545 |
20 |
Aramco Services Company | 3904 |
19 |
ExxonMobil Upstream Research Company | 2412 |
19 |
Eavor Technologies Inc. | 91 |
18 |
Services Petroliers Schlumberger | 5749 |
15 |
Nexen Energy ULC | 43 |
14 |
Shell Oil Company | 2141 |
13 |
Siemens AG | 24568 |
10 |
Chevron U.S.A. Inc. | 3922 |
10 |
Imperial Oil Resources Limited | 169 |
10 |
PetroChina Company Limited | 673 |
10 |
China University of Petroleum (East China) | 367 |
9 |
Other owners | 413 |