- 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 7/18 - Drilling by liquid or gas jets, with or without entrained pellets
Patent holdings for IPC class E21B 7/18
Total number of patents in this class: 318
10-year publication summary
31
|
38
|
27
|
28
|
43
|
27
|
16
|
13
|
20
|
4
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Coiled Tubing Specialties, LLC | 31 |
21 |
Shell Internationale Research Maatschappij B.V. | 3792 |
14 |
Halliburton Energy Services, Inc. | 20165 |
12 |
China University of Mining and Technology | 1189 |
12 |
Saudi Arabian Oil Company | 11322 |
10 |
Schlumberger Technology Corporation | 9690 |
9 |
China University of Petroleum (East China) | 319 |
6 |
Shell Canada Limited | 139 |
5 |
Petrojet Canada Inc. | 7 |
5 |
Schlumberger Canada Limited | 6913 |
4 |
Schlumberger Technology B.v. | 4951 |
4 |
Services Petroliers Schlumberger | 5426 |
4 |
Vermeer Manufacturing Company | 615 |
4 |
Xuzhou Olivine Geoscience & Geotech Co., Ltd | 12 |
4 |
Baker Hughes Holdings LLC | 3060 |
4 |
Canopus Drilling Solutions Holding B.V. | 4 |
4 |
Shell Oil Company | 2196 |
3 |
Aramco Services Company | 3504 |
3 |
ExxonMobil Upstream Research Company | 2525 |
3 |
Itrec B.V. | 477 |
3 |
Other owners | 184 |