- 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 3/00 - Rotary drilling
Patent holdings for IPC class E21B 3/00
Total number of patents in this class: 347
10-year publication summary
73
|
85
|
39
|
42
|
19
|
20
|
15
|
13
|
4
|
1
|
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 |
38 |
Schlumberger Technology Corporation | 9690 |
14 |
Robert Bosch GmbH | 40953 |
10 |
Baker Hughes, a GE Company, LLC | 2171 |
10 |
Vermeer Manufacturing Company | 615 |
9 |
National Oilwell Varco, L.P. | 1604 |
8 |
Baker Hughes Holdings LLC | 3060 |
8 |
Baker Hughes Incorporated | 5689 |
7 |
Nabors Drilling Technologies USA, Inc. | 533 |
7 |
Sandvik Mining and Construction G.m.b.H. | 85 |
6 |
US Synthetic Corporation | 601 |
6 |
Schlumberger Canada Limited | 6913 |
5 |
Black & Decker, Inc. | 2402 |
5 |
Prad Research and Development Limited | 2696 |
5 |
Services Petroliers Schlumberger | 5426 |
5 |
Smith International, Inc. | 761 |
4 |
D-tech (UK) Limited | 16 |
4 |
National Oilwell DHT, L.P. | 159 |
4 |
Sandvik Mining and Construction Oy | 703 |
4 |
Schlumberger Technology B.v. | 4951 |
3 |
Other owners | 185 |