- 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 17/03 - Couplings; Joints 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: 229
10-year publication summary
|
32
|
37
|
31
|
32
|
12
|
8
|
17
|
7
|
10
|
2
|
| 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 |
41 |
| Weatherford Technology Holdings, LLC | 2135 |
16 |
| Sandvik Intellectual Property AB | 1634 |
13 |
| The Charles Machine Works, Inc. | 411 |
6 |
| J.H. Fletcher & Co. | 82 |
6 |
| National Oilwell Varco, L.P. | 1604 |
5 |
| Vermeer Manufacturing Company | 615 |
5 |
| Sandvik Mining and Construction Tools AB | 147 |
5 |
| Schlumberger Canada Limited | 6913 |
4 |
| Schlumberger Technology B.v. | 4951 |
4 |
| Baker Hughes Incorporated | 5689 |
4 |
| Smith International, Inc. | 761 |
4 |
| Evolution Engineering Inc. | 313 |
4 |
| Services Petroliers Schlumberger | 5426 |
4 |
| Rival Downhole Tools LC | 37 |
4 |
| Schlumberger Technology Corporation | 9690 |
3 |
| Schlumberger Holdings Limited | 2947 |
3 |
| Bauer Maschinen GmbH | 210 |
3 |
| Prad Research and Development Limited | 2696 |
3 |
| Stahl- und Apparatebau Hans Leffer GmbH & Co. KG | 4 |
3 |
| Other owners | 89 |