- 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 4/00 - Drives for drilling, used in the borehole
Patent holdings for IPC class E21B 4/00
Total number of patents in this class: 789
10-year publication summary
|
74
|
55
|
63
|
55
|
56
|
47
|
38
|
35
|
45
|
32
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21103 |
139 |
| US Synthetic Corporation | 613 |
69 |
| Schlumberger Technology Corporation | 11089 |
36 |
| National Oilwell Varco, L.P. | 1703 |
27 |
| Schlumberger Canada Limited | 7446 |
20 |
| Services Petroliers Schlumberger | 5888 |
20 |
| Schlumberger Technology B.v. | 5224 |
19 |
| Baker Hughes Incorporated | 5168 |
14 |
| Upwing Energy, Inc. | 51 |
13 |
| Baker Hughes Holdings LLC | 3000 |
12 |
| Saudi Arabian Oil Company | 13716 |
11 |
| Rival Downhole Tools LC | 54 |
11 |
| Baker Hughes, a GE Company, LLC | 2103 |
10 |
| Welltec AS | 300 |
9 |
| Smith International, Inc. | 713 |
8 |
| Coiled Tubing Rental Tools, Inc. | 12 |
7 |
| I-jack Technologies Incorporated | 24 |
7 |
| Impulse Downhole Solutions Ltd. | 55 |
7 |
| Thru Tubing Solutions, Inc. | 382 |
7 |
| Xr Reserve LLC | 35 |
7 |
| Other owners | 336 |