- 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 17/02 - CouplingsJoints
Patent holdings for IPC class E21B 17/02
Total number of patents in this class: 2667
10-year publication summary
|
171
|
170
|
163
|
145
|
130
|
175
|
186
|
147
|
138
|
122
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21021 |
505 |
| Schlumberger Technology Corporation | 11023 |
199 |
| Schlumberger Canada Limited | 7418 |
109 |
| Schlumberger Technology B.v. | 5217 |
103 |
| Services Petroliers Schlumberger | 5874 |
103 |
| Baker Hughes Oilfield Operations, LLC | 2380 |
82 |
| Baker Hughes Incorporated | 5179 |
76 |
| Baker Hughes, a GE Company, LLC | 2107 |
59 |
| Saudi Arabian Oil Company | 13622 |
51 |
| Weatherford Technology Holdings, LLC | 2034 |
36 |
| Prad Research and Development Limited | 2687 |
35 |
| Schlumberger Holdings Limited | 2791 |
34 |
| Cameron International Corporation | 1351 |
32 |
| Evolution Engineering Inc. | 300 |
32 |
| Baker Hughes Holdings LLC | 3005 |
29 |
| Nextstream Wired Pipe, LLC | 36 |
22 |
| IntelliServ, LLC | 85 |
19 |
| Impact Selector International, LLC | 112 |
18 |
| Think and Vision GmbH | 30 |
18 |
| S+s Industries Technology LLC | 24 |
17 |
| Other owners | 1088 |