- 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 44/04 - Automatic control of the tool feed in response to the torque of the drive
Patent holdings for IPC class E21B 44/04
Total number of patents in this class: 336
10-year publication summary
|
40
|
21
|
41
|
40
|
31
|
46
|
24
|
30
|
17
|
13
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20788 |
51 |
| Schlumberger Technology Corporation | 10652 |
50 |
| Nabors Drilling Technologies USA, Inc. | 558 |
18 |
| Landmark Graphics Corporation | 1524 |
13 |
| Motive Drilling Technologies, Inc. | 102 |
13 |
| Schlumberger Canada Limited | 7266 |
12 |
| Baker Hughes, a GE Company, LLC | 2114 |
12 |
| Services Petroliers Schlumberger | 5771 |
9 |
| Baker Hughes Oilfield Operations, LLC | 2283 |
9 |
| Schlumberger Technology B.v. | 5160 |
8 |
| ConocoPhillips Company | 1675 |
7 |
| National Oilwell Varco, L.P. | 1661 |
7 |
| Pason Systems Corp. | 77 |
6 |
| Shell USA, Inc. | 1207 |
6 |
| Weatherford Technology Holdings, LLC | 2016 |
5 |
| ExxonMobil Upstream Research Company | 2408 |
5 |
| Magnetic Variation Services, LLC | 37 |
5 |
| Epiroc Rock Drills Aktiebolag | 512 |
5 |
| Helmerich & Payne Technologies, LLC | 101 |
5 |
| Baker Hughes Holdings LLC | 3006 |
5 |
| Other owners | 85 |