- 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 10/32 - Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
Patent holdings for IPC class E21B 10/32
Total number of patents in this class: 612
10-year publication summary
|
60
|
53
|
50
|
33
|
52
|
25
|
31
|
34
|
17
|
4
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Baker Hughes Incorporated | 5689 |
83 |
| Schlumberger Technology Corporation | 9690 |
53 |
| Smith International, Inc. | 761 |
36 |
| Halliburton Energy Services, Inc. | 20165 |
33 |
| Saudi Arabian Oil Company | 11322 |
29 |
| Schlumberger Canada Limited | 6913 |
27 |
| Schlumberger Technology B.v. | 4951 |
26 |
| Services Petroliers Schlumberger | 5426 |
26 |
| Baker Hughes Holdings LLC | 3060 |
18 |
| Weatherford Technology Holdings, LLC | 2135 |
15 |
| NOV Downhole Eurasia Limited | 46 |
12 |
| Baker Hughes, a GE Company, LLC | 2171 |
12 |
| Schlumberger Holdings Limited | 2947 |
10 |
| Grant Prideco, Inc. | 384 |
10 |
| Prad Research and Development Limited | 2696 |
10 |
| Abrado, Inc. | 35 |
9 |
| Aramco Services Company | 3504 |
9 |
| Ardyne Holdings Limited | 86 |
8 |
| Mitsubishi Materials Corporation | 2378 |
6 |
| Welltec AS | 301 |
6 |
| Other owners | 174 |