- 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 17/14 - Casing shoes
Patent holdings for IPC class E21B 17/14
Total number of patents in this class: 132
10-year publication summary
8
|
6
|
8
|
15
|
10
|
10
|
9
|
21
|
5
|
2
|
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 |
15 |
Baker Hughes Incorporated | 5689 |
11 |
Saudi Arabian Oil Company | 11322 |
7 |
Baker Hughes Oilfield Operations, LLC | 1885 |
7 |
ConocoPhillips Company | 1657 |
6 |
Deep Casing Tools, Ltd. | 35 |
6 |
Baker Hughes Holdings LLC | 3060 |
6 |
Downhole Products Limited | 48 |
5 |
NCS Multistage Inc. | 172 |
5 |
Oy Atlas Copco Rotex Ab | 18 |
5 |
WWT North America Holdings, Inc. | 59 |
5 |
Weatherford Technology Holdings, LLC | 2135 |
4 |
Enventure Global Technology, L.L.C. | 113 |
3 |
Neodrill AS | 39 |
3 |
Tercel IP Limited | 46 |
3 |
Frank's International, LLC | 241 |
2 |
Ace Oil Tools | 5 |
2 |
Schlumberger Technology Corporation | 9690 |
1 |
Schlumberger Canada Limited | 6913 |
1 |
Shell Internationale Research Maatschappij B.V. | 3792 |
1 |
Other owners | 34 |