- 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 17/043 - CouplingsJoints between rod and bit, or between rod and rod threaded with locking means
Patent holdings for IPC class E21B 17/043
Total number of patents in this class: 272
10-year publication summary
|
25
|
24
|
16
|
12
|
20
|
17
|
15
|
12
|
15
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21154 |
28 |
| Baker Hughes Incorporated | 5069 |
12 |
| Vallourec Oil and Gas France | 451 |
12 |
| Nippon Steel Corporation | 6666 |
10 |
| Baker Hughes Oilfield Operations, LLC | 2429 |
9 |
| Tenaris Connections B.V. | 189 |
8 |
| Vetco Gray Inc. | 142 |
8 |
| Weatherford Technology Holdings, LLC | 2034 |
7 |
| Cameron International Corporation | 1363 |
7 |
| DYNAenergetics Europe GmbH | 257 |
7 |
| Innovex International, Inc | 122 |
7 |
| Schlumberger Technology Corporation | 11436 |
6 |
| The Charles Machine Works, Inc. | 414 |
6 |
| Evolution Engineering Inc. | 300 |
4 |
| Itrec B.V. | 502 |
4 |
| National Oilwell Varco UK Limited | 33 |
4 |
| Baker Hughes, a GE Company, LLC | 2101 |
4 |
| Vetco Gray, LLC | 149 |
4 |
| Vertice Oil Tools Inc. | 95 |
4 |
| Schlumberger Canada Limited | 7552 |
3 |
| Other owners | 118 |