- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining 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: 778
10-year publication summary
35
|
38
|
34
|
45
|
50
|
59
|
95
|
84
|
72
|
23
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Halliburton Energy Services, Inc. | 20165 |
116 |
Schlumberger Technology Corporation | 9690 |
96 |
Schlumberger Canada Limited | 6913 |
65 |
Services Petroliers Schlumberger | 5426 |
53 |
Landmark Graphics Corporation | 1526 |
44 |
Schlumberger Technology B.v. | 4951 |
32 |
Saudi Arabian Oil Company | 11322 |
24 |
Geoquest Systems B.V. | 584 |
21 |
Motive Drilling Technologies, Inc. | 89 |
17 |
Nabors Drilling Technologies USA, Inc. | 533 |
17 |
Baker Hughes, a GE Company, LLC | 2171 |
14 |
National Oilwell Varco, L.P. | 1604 |
13 |
Sandvik Mining and Construction Oy | 703 |
12 |
Technological Resources Pty. Limited | 444 |
11 |
Baker Hughes Oilfield Operations, LLC | 1885 |
11 |
Baker Hughes Incorporated | 5689 |
9 |
ExxonMobil Upstream Research Company | 2525 |
8 |
Pason Systems Corp. | 77 |
8 |
Epiroc Rock Drills Aktiebolag | 405 |
7 |
Schlumberger Holdings Limited | 2947 |
6 |
Other owners | 194 |