- 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 17/042 - CouplingsJoints 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: 1580
10-year publication summary
|
105
|
115
|
116
|
95
|
98
|
120
|
120
|
83
|
80
|
49
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Vallourec Oil and Gas France | 453 |
178 |
| Nippon Steel Corporation | 6344 |
125 |
| Halliburton Energy Services, Inc. | 20946 |
69 |
| Sandvik Mining and Construction Tools AB | 173 |
43 |
| Schlumberger Technology Corporation | 10881 |
34 |
| National Oilwell Varco, L.P. | 1686 |
30 |
| Weatherford Technology Holdings, LLC | 2029 |
29 |
| Hydril Company | 93 |
29 |
| Sandvik Intellectual Property AB | 1475 |
29 |
| Baker Hughes Oilfield Operations, LLC | 2322 |
29 |
| Tenaris Connections B.V. | 172 |
26 |
| Nippon Steel & Sumitomo Metal Corporation | 1987 |
25 |
| JFE Steel Corporation | 6935 |
23 |
| Evolution Engineering Inc. | 301 |
22 |
| Saudi Arabian Oil Company | 13372 |
19 |
| Boart Longyear Manufacturing and Distribution Inc. | 110 |
18 |
| Schlumberger Canada Limited | 7366 |
17 |
| Schlumberger Technology B.v. | 5183 |
17 |
| Services Petroliers Schlumberger | 5828 |
17 |
| Baker Hughes Incorporated | 5248 |
16 |
| Other owners | 785 |