- 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: 351
10-year publication summary
|
38
|
18
|
32
|
37
|
32
|
43
|
23
|
29
|
17
|
18
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Schlumberger Technology Corporation | 10868 |
54 |
| Halliburton Energy Services, Inc. | 20944 |
51 |
| Nabors Drilling Technologies USA, Inc. | 561 |
19 |
| Schlumberger Canada Limited | 7363 |
14 |
| Landmark Graphics Corporation | 1523 |
13 |
| Motive Drilling Technologies, Inc. | 103 |
13 |
| Baker Hughes, a GE Company, LLC | 2111 |
12 |
| Services Petroliers Schlumberger | 5827 |
11 |
| Schlumberger Technology B.v. | 5187 |
10 |
| Baker Hughes Oilfield Operations, LLC | 2320 |
9 |
| ConocoPhillips Company | 1675 |
7 |
| National Oilwell Varco, L.P. | 1686 |
7 |
| Pason Systems Corp. | 82 |
7 |
| Magnetic Variation Services, LLC | 38 |
6 |
| Saudi Arabian Oil Company | 13349 |
6 |
| Shell USA, Inc. | 1235 |
6 |
| Weatherford Technology Holdings, LLC | 2029 |
5 |
| ExxonMobil Upstream Research Company | 2395 |
5 |
| Epiroc Rock Drills Aktiebolag | 529 |
5 |
| Helmerich & Payne Technologies, LLC | 103 |
5 |
| Other owners | 86 |