- 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: 967
10-year publication summary
|
28
|
38
|
40
|
55
|
94
|
74
|
70
|
75
|
61
|
11
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21098 |
153 |
| Schlumberger Technology Corporation | 11274 |
125 |
| Schlumberger Canada Limited | 7487 |
88 |
| Services Petroliers Schlumberger | 5923 |
73 |
| Schlumberger Technology B.v. | 5245 |
49 |
| Landmark Graphics Corporation | 1510 |
49 |
| Saudi Arabian Oil Company | 13857 |
27 |
| Motive Drilling Technologies, Inc. | 103 |
25 |
| Geoquest Systems B.V. | 814 |
24 |
| Nabors Drilling Technologies USA, Inc. | 565 |
22 |
| Baker Hughes Oilfield Operations, LLC | 2405 |
18 |
| Technological Resources Pty. Limited | 448 |
14 |
| Baker Hughes, a GE Company, LLC | 2105 |
14 |
| National Oilwell Varco, L.P. | 1702 |
13 |
| Sandvik Mining and Construction Oy | 858 |
12 |
| Pason Systems Corp. | 82 |
10 |
| Baker Hughes Incorporated | 5109 |
9 |
| Vermeer Manufacturing Company | 655 |
9 |
| Caterpillar Global Mining Equipment LLC | 173 |
8 |
| ExxonMobil Upstream Research Company | 2358 |
8 |
| Other owners | 217 |