- 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 10/32 - Drill bits with leading portion, i.e. drill bits with a pilot cutterDrill 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: 624
10-year publication summary
|
53
|
50
|
32
|
52
|
25
|
32
|
34
|
20
|
14
|
6
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Baker Hughes Incorporated | 5279 |
82 |
| Schlumberger Technology Corporation | 10652 |
56 |
| Smith International, Inc. | 720 |
36 |
| Halliburton Energy Services, Inc. | 20788 |
31 |
| Saudi Arabian Oil Company | 12911 |
30 |
| Schlumberger Canada Limited | 7266 |
28 |
| Schlumberger Technology B.v. | 5160 |
28 |
| Services Petroliers Schlumberger | 5771 |
28 |
| Baker Hughes Holdings LLC | 3006 |
18 |
| Weatherford Technology Holdings, LLC | 2016 |
15 |
| NOV Downhole Eurasia Limited | 45 |
12 |
| Baker Hughes, a GE Company, LLC | 2114 |
12 |
| Grant Prideco, Inc. | 376 |
11 |
| Schlumberger Holdings Limited | 2839 |
10 |
| Prad Research and Development Limited | 2693 |
10 |
| Abrado, Inc. | 27 |
9 |
| Aramco Services Company | 3927 |
9 |
| Ardyne Holdings Limited | 87 |
8 |
| Mincon Nordic Oy | 14 |
7 |
| Chevron U.S.A. Inc. | 3939 |
6 |
| Other owners | 178 |