- 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: 420
10-year publication summary
|
34
|
36
|
41
|
35
|
32
|
28
|
21
|
14
|
16
|
16
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Frank's International, LLC | 240 |
49 |
| Weatherford Technology Holdings, LLC | 2033 |
34 |
| Itrec B.V. | 505 |
22 |
| Schlumberger Technology Corporation | 11054 |
12 |
| Nabors Drilling Technologies USA, Inc. | 564 |
11 |
| Baker Hughes Incorporated | 5175 |
6 |
| Ensco International Incorporated | 54 |
6 |
| Frank's International, Inc. | 63 |
6 |
| The Wellboss Company, LLC | 108 |
6 |
| Cameron International Corporation | 1353 |
5 |
| FMC Technologies, Inc. | 609 |
5 |
| GE Oil & Gas Pressure Control LP | 74 |
5 |
| National Oilwell Varco, L.P. | 1699 |
5 |
| Saudi Arabian Oil Company | 13656 |
5 |
| Baker Hughes Oilfield Operations, LLC | 2390 |
5 |
| Halliburton Energy Services, Inc. | 21078 |
4 |
| Forum US, Inc. | 341 |
4 |
| Frank's Casing Crew and Rental Tools, Inc. | 13 |
4 |
| Helmerich & Payne, Inc. | 55 |
4 |
| Hydril USA Distribution LLC | 214 |
4 |
| Other owners | 218 |