- 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 19/084 - 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 flexible drawing means, e.g. cables
Patent holdings for IPC class E21B 19/084
Total number of patents in this class: 135
10-year publication summary
|
12
|
6
|
11
|
15
|
8
|
7
|
14
|
9
|
7
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| National Oilwell Varco, L.P. | 1701 |
11 |
| Halliburton Energy Services, Inc. | 21154 |
7 |
| Schlumberger Technology Corporation | 11436 |
6 |
| TT Technologies, Inc. | 152 |
6 |
| Noble Drilling A/S | 52 |
6 |
| Joy Global Underground Mining LLC | 348 |
5 |
| Caterpillar Inc. | 10058 |
4 |
| Caterpillar Global Mining Equipment LLC | 174 |
4 |
| Stewart & Stevenson LLC | 124 |
4 |
| Atlas Copco Rock Drills AB | 128 |
3 |
| Ensco Services Limited | 8 |
3 |
| Itrec B.V. | 502 |
3 |
| Mhwirth AS | 130 |
3 |
| Nabors Drilling Technologies USA, Inc. | 571 |
3 |
| Reflex Instruments Asia Pacific Pty Ltd | 88 |
3 |
| Epiroc Rock Drills Aktiebolag | 613 |
3 |
| Keller North America, Inc. | 17 |
3 |
| Beijing Sany Intelligent Manufacturing Technology Co., Ltd. | 17 |
3 |
| Castor Drilling Solution AS | 7 |
2 |
| Forum US, Inc. | 345 |
2 |
| Other owners | 51 |