- 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 31/16 - Grappling tools, e.g. tongs or grabs combined with cutting or destroying means
Patent holdings for IPC class E21B 31/16
Total number of patents in this class: 125
10-year publication summary
|
9
|
10
|
12
|
10
|
9
|
13
|
9
|
10
|
8
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Ardyne Holdings Limited | 60 |
16 |
| Saudi Arabian Oil Company | 14390 |
15 |
| Weatherford Technology Holdings, LLC | 2167 |
14 |
| Baker Hughes Incorporated | 4870 |
6 |
| Robertson Intellectual Properties, LLC | 94 |
6 |
| Aramco Services Company | 4191 |
4 |
| Baker Hughes Oilfield Operations, LLC | 2555 |
4 |
| Downing Wellhead Equipment, LLC | 52 |
4 |
| Baker Hughes Holdings LLC | 3011 |
4 |
| Schlumberger Technology Corporation | 11961 |
3 |
| Schlumberger Canada Limited | 7616 |
2 |
| Schlumberger Technology B.v. | 5289 |
2 |
| Halliburton Energy Services, Inc. | 21299 |
2 |
| Archer Oil Tools AS | 18 |
2 |
| Qinterra Technologies AS | 32 |
2 |
| Services Petroliers Schlumberger | 6024 |
2 |
| TCO AS | 74 |
2 |
| TIW Corporation | 29 |
2 |
| Welltec AS | 326 |
2 |
| Archer Oiltools AS | 47 |
2 |
| Other owners | 29 |