- 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 | 512 |
5 |
Halliburton Energy Services, Inc. | 20835 |
4 |
Sandvik Intellectual Property AB | 1484 |
4 |
Sandvik Mining and Construction Oy | 819 |
4 |
Capella Partners XI LLC | 10 |
3 |
Schlumberger Technology Corporation | 10662 |
2 |
Schlumberger Canada Limited | 7273 |
2 |
Atlas Copco Rock Drills AB | 143 |
2 |
Montabert | 59 |
2 |
REI, Inc. | 23 |
2 |
Services Petroliers Schlumberger | 5772 |
2 |
Schlumberger Technology B.v. | 5161 |
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 |