- 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 17/03 - CouplingsJoints between drilling rod or pipe and drill motor, e.g. between drilling rod and hammer
Patent holdings for IPC class E21B 17/03
Total number of patents in this class: 244
10-year publication summary
|
31
|
32
|
12
|
8
|
17
|
8
|
11
|
13
|
11
|
13
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21296 |
36 |
| Weatherford Technology Holdings, LLC | 2168 |
12 |
| Sandvik Intellectual Property AB | 1388 |
12 |
| Sandvik Mining and Construction Tools AB | 204 |
10 |
| J.H. Fletcher & Co. | 70 |
7 |
| The Charles Machine Works, Inc. | 426 |
6 |
| Bauer Maschinen GmbH | 251 |
5 |
| Tracto-Technik GmbH & Co. KG | 168 |
5 |
| Vermeer Manufacturing Company | 671 |
5 |
| Schlumberger Canada Limited | 7621 |
4 |
| Schlumberger Technology B.v. | 5292 |
4 |
| Baker Hughes Incorporated | 4865 |
4 |
| Smith International, Inc. | 683 |
4 |
| Evolution Engineering Inc. | 302 |
4 |
| National Oilwell Varco, L.P. | 1698 |
4 |
| Noetic Technologies Inc. | 133 |
4 |
| Services Petroliers Schlumberger | 6029 |
4 |
| Epiroc Drilling Tools Aktiebolag | 99 |
4 |
| New Ventures Marketing, LLC | 6 |
4 |
| Schlumberger Technology Corporation | 11981 |
3 |
| Other owners | 103 |