- 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 45/00 - Measuring the drilling time or rate of penetration
Patent holdings for IPC class E21B 45/00
Total number of patents in this class: 432
10-year publication summary
|
56
|
34
|
25
|
36
|
57
|
43
|
55
|
31
|
36
|
8
|
| 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 |
60 |
| Schlumberger Technology Corporation | 9690 |
44 |
| Saudi Arabian Oil Company | 11322 |
30 |
| Landmark Graphics Corporation | 1526 |
26 |
| Motive Drilling Technologies, Inc. | 89 |
20 |
| Baker Hughes Incorporated | 5689 |
17 |
| ExxonMobil Upstream Research Company | 2525 |
16 |
| globalTech Corporation Pty Ltd | 51 |
9 |
| National Oilwell Varco, L.P. | 1604 |
8 |
| Baker Hughes, a GE Company, LLC | 2171 |
8 |
| Nabors Drilling Technologies USA, Inc. | 533 |
7 |
| Schlumberger Canada Limited | 6913 |
6 |
| Aramco Services Company | 3504 |
6 |
| Pason Systems Corp. | 77 |
6 |
| Technological Resources Pty. Limited | 444 |
6 |
| Schlumberger Technology B.v. | 4951 |
5 |
| Merlin Technology, Inc. | 165 |
5 |
| Services Petroliers Schlumberger | 5426 |
5 |
| Shell USA, Inc. | 1074 |
5 |
| Schlumberger Holdings Limited | 2947 |
4 |
| Other owners | 139 |