- 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 4/02 - Fluid rotary type drives
Patent holdings for IPC class E21B 4/02
Total number of patents in this class: 1146
10-year publication summary
119
|
116
|
98
|
106
|
87
|
75
|
75
|
60
|
66
|
16
|
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 |
223 |
Schlumberger Technology Corporation | 9690 |
74 |
National Oilwell Varco, L.P. | 1604 |
60 |
Schlumberger Canada Limited | 6913 |
52 |
Baker Hughes Incorporated | 5689 |
45 |
Services Petroliers Schlumberger | 5426 |
44 |
Schlumberger Technology B.v. | 4951 |
39 |
Thru Tubing Solutions, Inc. | 361 |
35 |
Smith International, Inc. | 761 |
31 |
Schlumberger Holdings Limited | 2947 |
30 |
Prad Research and Development Limited | 2696 |
29 |
Saudi Arabian Oil Company | 11322 |
27 |
Baker Hughes, a GE Company, LLC | 2171 |
18 |
Impulse Downhole Solutions Ltd. | 54 |
12 |
Rival Downhole Tools LC | 37 |
12 |
Weatherford Technology Holdings, LLC | 2135 |
11 |
National Oilwell DHT, L.P. | 159 |
11 |
Upwing Energy, Inc. | 49 |
11 |
US Synthetic Corporation | 601 |
9 |
Baker Hughes Holdings LLC | 3060 |
9 |
Other owners | 364 |