- 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 |