- 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 4/06 - Down-hole impacting means, e.g. hammers
Patent holdings for IPC class E21B 4/06
Total number of patents in this class: 154
10-year publication summary
20
|
16
|
11
|
11
|
4
|
3
|
4
|
2
|
3
|
1
|
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 |
30 |
Baker Hughes Incorporated | 5689 |
10 |
Tracto-Technik GmbH & Co. KG | 166 |
7 |
Schlumberger Technology Corporation | 9690 |
6 |
Center Rock Inc. | 36 |
5 |
Schlumberger Canada Limited | 6913 |
4 |
Schlumberger Technology B.v. | 4951 |
4 |
Schlumberger Holdings Limited | 2947 |
4 |
Prad Research and Development Limited | 2696 |
4 |
Services Petroliers Schlumberger | 5426 |
4 |
Smith International, Inc. | 761 |
3 |
China Petroleum & Chemical Corporation | 1623 |
3 |
Flexidrill Limited | 53 |
3 |
Mincon International Limited | 52 |
3 |
Sandvik Mining and Construction Oy | 703 |
3 |
Technological Resources Pty. Limited | 444 |
3 |
Impact Selector International, LLC | 117 |
2 |
Sinopec Research Institute of Petroleum Engineering | 25 |
2 |
Strada Design Limited | 9 |
2 |
Strada Design Limited | 3 |
2 |
Other owners | 50 |