- 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 17/042 - Couplings; Joints between rod and bit, or between rod and rod threaded
Patent holdings for IPC class E21B 17/042
Total number of patents in this class: 1468
10-year publication summary
115
|
133
|
131
|
146
|
119
|
121
|
136
|
138
|
87
|
26
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Vallourec Oil and Gas France | 450 |
174 |
Nippon Steel Corporation | 5649 |
136 |
Halliburton Energy Services, Inc. | 20165 |
59 |
Sandvik Mining and Construction Tools AB | 147 |
38 |
Sandvik Intellectual Property AB | 1634 |
31 |
Hydril Company | 111 |
28 |
Schlumberger Technology Corporation | 9690 |
25 |
Nippon Steel & Sumitomo Metal Corporation | 1990 |
25 |
Tenaris Connections B.V. | 171 |
25 |
Evolution Engineering Inc. | 313 |
23 |
National Oilwell Varco, L.P. | 1604 |
23 |
Weatherford Technology Holdings, LLC | 2135 |
22 |
JFE Steel Corporation | 6067 |
21 |
Boart Longyear Company | 262 |
19 |
Saudi Arabian Oil Company | 11322 |
18 |
Baker Hughes Oilfield Operations, LLC | 1885 |
18 |
Baker Hughes Incorporated | 5689 |
17 |
Vallourec Mannesmann Oil & Gas France | 66 |
17 |
Baker Hughes, a GE Company, LLC | 2171 |
15 |
Schlumberger Canada Limited | 6913 |
13 |
Other owners | 721 |