- 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 6/02 - Drives for drilling with combined rotary and percussive action the rotation being continuous
Patent holdings for IPC class E21B 6/02
Total number of patents in this class: 54
10-year publication summary
|
1
|
12
|
14
|
8
|
2
|
5
|
0
|
4
|
3
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Ashmin Holding LLC | 19 |
8 |
| Halliburton Energy Services, Inc. | 20165 |
6 |
| Aker Kvaerner MH AS | 5 |
4 |
| National Oilwell Varco, L.P. | 1604 |
3 |
| Baker Hughes Incorporated | 5689 |
2 |
| Smith International, Inc. | 761 |
2 |
| Montabert | 64 |
2 |
| Ningbo NGP Industry Co., Ltd. | 16 |
2 |
| Rival Downhole Tools LC | 37 |
2 |
| Ashmin LC | 8 |
1 |
| China University of Petroleum (East China) | 319 |
1 |
| Dreco Energy Services ULC | 36 |
1 |
| Eurodrill GmbH | 25 |
1 |
| Everdigm Corp. | 12 |
1 |
| Hirado Kinzoku Kogyo Co., Ltd. | 3 |
1 |
| Impulse Downhole Solutions Ltd. | 54 |
1 |
| Milwaukee Electric Tool Corporation | 3572 |
1 |
| NOV Worldwide C.V. | 4 |
1 |
| Sandvik Intellectual Property AB | 1634 |
1 |
| Sandvik Mining and Construction Oy | 703 |
1 |
| Other owners | 12 |