- 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 1/02 - Surface drives for drop hammers, e.g. with a cable
Patent holdings for IPC class E21B 1/02
Total number of patents in this class: 60
10-year publication summary
|
7
|
7
|
4
|
9
|
6
|
2
|
3
|
2
|
1
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Epiroc Rock Drills Aktiebolag | 514 |
5 |
| Halliburton Energy Services, Inc. | 20862 |
4 |
| Sandvik Intellectual Property AB | 1484 |
4 |
| Sandvik Mining and Construction Oy | 823 |
4 |
| Capella Partners XI LLC | 10 |
3 |
| Schlumberger Technology Corporation | 10673 |
2 |
| Schlumberger Canada Limited | 7283 |
2 |
| Atlas Copco Rock Drills AB | 143 |
2 |
| Montabert | 59 |
2 |
| REI, Inc. | 23 |
2 |
| Services Petroliers Schlumberger | 5775 |
2 |
| Schlumberger Technology B.v. | 5164 |
1 |
| ABI Anlagentechnik-Baumaschinen-Industriebedarf Maschinenfabrik und Vertriebsgesellschaft mbH | 48 |
1 |
| Berry Metal Company | 52 |
1 |
| Canrig Drilling Technology Ltd. | 68 |
1 |
| Doofor Oy | 5 |
1 |
| Furukawa Rock Drill Co., Ltd. | 36 |
1 |
| Geoquest Systems B.V. | 736 |
1 |
| J.H. Fletcher & Co. | 79 |
1 |
| JW Tooling, LLC | 2 |
1 |
| Other owners | 19 |