- 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: 1586
10-year publication summary
|
105
|
115
|
116
|
95
|
98
|
120
|
120
|
83
|
80
|
53
|
| 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 | 457 |
178 |
| Nippon Steel Corporation | 6439 |
125 |
| Halliburton Energy Services, Inc. | 21020 |
70 |
| Sandvik Mining and Construction Tools AB | 175 |
43 |
| Schlumberger Technology Corporation | 10957 |
34 |
| National Oilwell Varco, L.P. | 1689 |
30 |
| Weatherford Technology Holdings, LLC | 2036 |
29 |
| Hydril Company | 93 |
29 |
| Sandvik Intellectual Property AB | 1470 |
29 |
| Baker Hughes Oilfield Operations, LLC | 2360 |
29 |
| Tenaris Connections B.V. | 176 |
26 |
| Nippon Steel & Sumitomo Metal Corporation | 1987 |
25 |
| JFE Steel Corporation | 7011 |
23 |
| Evolution Engineering Inc. | 300 |
22 |
| Saudi Arabian Oil Company | 13512 |
19 |
| Boart Longyear Manufacturing and Distribution Inc. | 107 |
18 |
| Schlumberger Canada Limited | 7403 |
17 |
| Schlumberger Technology B.v. | 5203 |
17 |
| Services Petroliers Schlumberger | 5852 |
17 |
| Baker Hughes Incorporated | 5233 |
16 |
| Other owners | 790 |