- 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 3/00 - Rotary drilling
Patent holdings for IPC class E21B 3/00
Total number of patents in this class: 344
10-year publication summary
|
35
|
35
|
17
|
17
|
12
|
13
|
2
|
4
|
9
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21107 |
38 |
| Schlumberger Technology Corporation | 11266 |
14 |
| National Oilwell Varco, L.P. | 1702 |
11 |
| Robert Bosch GmbH | 43268 |
10 |
| Baker Hughes, a GE Company, LLC | 2101 |
10 |
| Vermeer Manufacturing Company | 656 |
9 |
| Baker Hughes Holdings LLC | 2988 |
8 |
| Baker Hughes Incorporated | 5131 |
7 |
| Nabors Drilling Technologies USA, Inc. | 565 |
7 |
| Sandvik Mining and Construction G.m.b.H. | 90 |
6 |
| US Synthetic Corporation | 612 |
6 |
| Schlumberger Canada Limited | 7487 |
5 |
| D-tech (UK) Limited | 21 |
5 |
| Prad Research and Development Limited | 2685 |
5 |
| Services Petroliers Schlumberger | 5921 |
5 |
| Smith International, Inc. | 706 |
4 |
| Helmerich & Payne, Inc. | 55 |
4 |
| The Mosaic Company | 228 |
4 |
| Schlumberger Technology B.v. | 5242 |
3 |
| Schlumberger Holdings Limited | 2755 |
3 |
| Other owners | 180 |