- 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 17/02 - Couplings; Joints
Patent holdings for IPC class E21B 17/02
Total number of patents in this class: 2449
10-year publication summary
199
|
200
|
196
|
188
|
163
|
152
|
197
|
204
|
145
|
39
|
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 |
406 |
Schlumberger Technology Corporation | 9690 |
169 |
Schlumberger Canada Limited | 6913 |
99 |
Schlumberger Technology B.v. | 4951 |
94 |
Services Petroliers Schlumberger | 5426 |
94 |
Baker Hughes Incorporated | 5689 |
80 |
Baker Hughes Oilfield Operations, LLC | 1885 |
64 |
Baker Hughes, a GE Company, LLC | 2171 |
59 |
Saudi Arabian Oil Company | 11322 |
45 |
Schlumberger Holdings Limited | 2947 |
38 |
Weatherford Technology Holdings, LLC | 2135 |
35 |
Prad Research and Development Limited | 2696 |
35 |
Cameron International Corporation | 1305 |
33 |
Evolution Engineering Inc. | 313 |
33 |
Baker Hughes Holdings LLC | 3060 |
28 |
Nextstream Wired Pipe, LLC | 36 |
22 |
IntelliServ, LLC | 113 |
21 |
Impact Selector International, LLC | 117 |
19 |
Think and Vision GmbH | 28 |
17 |
Intelliserv International Holding, Ltd. | 36 |
16 |
Other owners | 1042 |