- 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 19/10 - SlipsSpiders
Patent holdings for IPC class E21B 19/10
Total number of patents in this class: 414
10-year publication summary
|
38
|
41
|
45
|
38
|
34
|
31
|
25
|
17
|
17
|
10
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Frank's International, LLC | 238 |
47 |
| Weatherford Technology Holdings, LLC | 2015 |
34 |
| Itrec B.V. | 503 |
22 |
| Schlumberger Technology Corporation | 10662 |
12 |
| Nabors Drilling Technologies USA, Inc. | 557 |
11 |
| Baker Hughes Incorporated | 5277 |
6 |
| Ensco International Incorporated | 54 |
6 |
| Frank's International, Inc. | 63 |
6 |
| The Wellboss Company, LLC | 102 |
6 |
| Cameron International Corporation | 1332 |
5 |
| FMC Technologies, Inc. | 599 |
5 |
| GE Oil & Gas Pressure Control LP | 75 |
5 |
| National Oilwell Varco, L.P. | 1661 |
5 |
| Saudi Arabian Oil Company | 12947 |
5 |
| Baker Hughes Oilfield Operations, LLC | 2288 |
5 |
| Halliburton Energy Services, Inc. | 20835 |
4 |
| Forum US, Inc. | 337 |
4 |
| Frank's Casing Crew and Rental Tools, Inc. | 13 |
4 |
| Hydril USA Distribution LLC | 213 |
4 |
| Mhwirth AS | 129 |
4 |
| Other owners | 214 |