- 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 44/02 - Automatic control of the tool feed
Patent holdings for IPC class E21B 44/02
Total number of patents in this class: 912
10-year publication summary
|
38
|
34
|
46
|
50
|
59
|
99
|
85
|
72
|
76
|
39
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20835 |
138 |
| Schlumberger Technology Corporation | 10662 |
116 |
| Schlumberger Canada Limited | 7273 |
82 |
| Services Petroliers Schlumberger | 5772 |
68 |
| Landmark Graphics Corporation | 1525 |
49 |
| Schlumberger Technology B.v. | 5161 |
45 |
| Saudi Arabian Oil Company | 12947 |
27 |
| Motive Drilling Technologies, Inc. | 102 |
25 |
| Geoquest Systems B.V. | 736 |
23 |
| Nabors Drilling Technologies USA, Inc. | 557 |
20 |
| Baker Hughes Oilfield Operations, LLC | 2288 |
16 |
| Baker Hughes, a GE Company, LLC | 2114 |
14 |
| Technological Resources Pty. Limited | 452 |
13 |
| National Oilwell Varco, L.P. | 1661 |
12 |
| Sandvik Mining and Construction Oy | 819 |
12 |
| Pason Systems Corp. | 78 |
10 |
| Baker Hughes Incorporated | 5277 |
9 |
| Vermeer Manufacturing Company | 635 |
9 |
| ExxonMobil Upstream Research Company | 2407 |
8 |
| Caterpillar Global Mining Equipment LLC | 155 |
7 |
| Other owners | 209 |