- 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 4/02 - Fluid rotary type drives
Patent holdings for IPC class E21B 4/02
Total number of patents in this class: 1245
10-year publication summary
|
91
|
92
|
77
|
69
|
65
|
56
|
60
|
44
|
53
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21107 |
234 |
| Schlumberger Technology Corporation | 11266 |
83 |
| National Oilwell Varco, L.P. | 1702 |
62 |
| Schlumberger Canada Limited | 7487 |
60 |
| Services Petroliers Schlumberger | 5921 |
50 |
| Schlumberger Technology B.v. | 5242 |
44 |
| Baker Hughes Incorporated | 5131 |
44 |
| Thru Tubing Solutions, Inc. | 382 |
42 |
| Smith International, Inc. | 706 |
31 |
| Schlumberger Holdings Limited | 2755 |
30 |
| Saudi Arabian Oil Company | 13839 |
30 |
| Prad Research and Development Limited | 2685 |
29 |
| Baker Hughes, a GE Company, LLC | 2101 |
18 |
| Weatherford Technology Holdings, LLC | 2032 |
13 |
| Impulse Downhole Solutions Ltd. | 54 |
13 |
| Rival Downhole Tools LC | 49 |
12 |
| Baker Hughes Oilfield Operations, LLC | 2402 |
11 |
| Upwing Energy, Inc. | 51 |
11 |
| KLX Energy Services LLC | 73 |
9 |
| National Oilwell DHT, L.P. | 120 |
9 |
| Other owners | 410 |