- 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 19/086 - Apparatus for feeding the rods or cablesApparatus for increasing or decreasing the pressure on the drilling toolApparatus for counterbalancing the weight of the rods with a fluid-actuated cylinder
Patent holdings for IPC class E21B 19/086
Total number of patents in this class: 132
10-year publication summary
|
10
|
7
|
11
|
11
|
9
|
9
|
11
|
4
|
7
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mhwirth AS | 130 |
10 |
| Halliburton Energy Services, Inc. | 20937 |
9 |
| Epiroc Rock Drills Aktiebolag | 527 |
6 |
| Tracto-Technik GmbH & Co. KG | 170 |
5 |
| Ensco Services Limited | 8 |
4 |
| Newkota Services and Rentals, LLC | 11 |
4 |
| Capella Partners XI LLC | 9 |
4 |
| Caterpillar Inc. | 9604 |
3 |
| The Charles Machine Works, Inc. | 407 |
3 |
| Nabors Drilling Technologies USA, Inc. | 561 |
3 |
| National Oilwell Varco, L.P. | 1683 |
3 |
| Sandvik Mining and Construction Oy | 836 |
3 |
| Ensign Drilling Inc. | 12 |
3 |
| Epiroc Drilling Tools Aktiebolag | 82 |
3 |
| Ugt Group Pty Ltd | 6 |
3 |
| Weatherford Technology Holdings, LLC | 2031 |
2 |
| Caterpillar Global Mining Equipment LLC | 160 |
2 |
| Construction Tools PC AB | 11 |
2 |
| GDF Suez | 38 |
2 |
| Herrenknecht AG | 203 |
2 |
| Other owners | 56 |