- 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 4/00 - Drives for drilling, used in the borehole
Patent holdings for IPC class E21B 4/00
Total number of patents in this class: 713
10-year publication summary
|
61
|
80
|
64
|
68
|
63
|
63
|
52
|
41
|
34
|
10
|
| 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 |
130 |
| US Synthetic Corporation | 601 |
64 |
| Schlumberger Technology Corporation | 9690 |
31 |
| National Oilwell Varco, L.P. | 1604 |
22 |
| Schlumberger Canada Limited | 6913 |
17 |
| Services Petroliers Schlumberger | 5426 |
16 |
| Schlumberger Technology B.v. | 4951 |
15 |
| Baker Hughes Incorporated | 5689 |
15 |
| Upwing Energy, Inc. | 49 |
13 |
| Baker Hughes Holdings LLC | 3060 |
12 |
| National Oilwell DHT, L.P. | 159 |
11 |
| Rival Downhole Tools LC | 37 |
11 |
| Baker Hughes, a GE Company, LLC | 2171 |
10 |
| Smith International, Inc. | 761 |
8 |
| Saudi Arabian Oil Company | 11322 |
8 |
| Coiled Tubing Rental Tools, Inc. | 12 |
7 |
| Impulse Downhole Solutions Ltd. | 54 |
7 |
| Thru Tubing Solutions, Inc. | 361 |
7 |
| Schlumberger Holdings Limited | 2947 |
6 |
| Ceradyne, Inc. | 18 |
6 |
| Other owners | 297 |