- 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: 347
10-year publication summary
|
85
|
38
|
42
|
19
|
20
|
14
|
15
|
4
|
4
|
6
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20901 |
38 |
| Schlumberger Technology Corporation | 10727 |
14 |
| National Oilwell Varco, L.P. | 1669 |
11 |
| Robert Bosch GmbH | 42684 |
10 |
| Baker Hughes, a GE Company, LLC | 2112 |
10 |
| Vermeer Manufacturing Company | 635 |
9 |
| Baker Hughes Holdings LLC | 3006 |
8 |
| Baker Hughes Incorporated | 5241 |
7 |
| Nabors Drilling Technologies USA, Inc. | 556 |
7 |
| Sandvik Mining and Construction G.m.b.H. | 88 |
6 |
| US Synthetic Corporation | 623 |
6 |
| Schlumberger Canada Limited | 7296 |
5 |
| D-tech (UK) Limited | 17 |
5 |
| Prad Research and Development Limited | 2693 |
5 |
| Services Petroliers Schlumberger | 5787 |
5 |
| Black & Decker, Inc. | 2409 |
4 |
| Helmerich & Payne, Inc. | 55 |
4 |
| The Mosaic Company | 210 |
4 |
| Sandvik Mining and Construction Oy | 829 |
4 |
| Schlumberger Technology B.v. | 5165 |
3 |
| Other owners | 182 |