- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 19/084 - Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with flexible drawing means, e.g. cables
Patent holdings for IPC class E21B 19/084
Total number of patents in this class: 124
10-year publication summary
5
|
20
|
15
|
9
|
12
|
16
|
9
|
8
|
15
|
1
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
National Oilwell Varco, L.P. | 1604 |
10 |
Schlumberger Technology Corporation | 9690 |
6 |
Halliburton Energy Services, Inc. | 20165 |
6 |
TT Technologies, Inc. | 145 |
6 |
Noble Drilling A/S | 49 |
6 |
Atlas Copco Rock Drills AB | 177 |
4 |
Caterpillar Global Mining Equipment LLC | 115 |
4 |
Stewart & Stevenson LLC | 91 |
4 |
Joy Global Underground Mining LLC | 331 |
4 |
Ensco Services Limited | 9 |
3 |
Itrec B.V. | 477 |
3 |
Mhwirth AS | 113 |
3 |
Nabors Drilling Technologies USA, Inc. | 533 |
3 |
Epiroc Rock Drills Aktiebolag | 405 |
3 |
Keller North America, Inc. | 13 |
3 |
Beijing Sany Intelligent Manufacturing Technology Co., Ltd. | 16 |
3 |
Caterpillar Inc. | 8877 |
2 |
Cameron International Corporation | 1305 |
2 |
Castor Drilling Solution AS | 7 |
2 |
Frank's International, LLC | 241 |
2 |
Other owners | 45 |