- 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 10/42 - Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
Patent holdings for IPC class E21B 10/42
Total number of patents in this class: 847
10-year publication summary
|
115
|
166
|
117
|
92
|
95
|
58
|
40
|
32
|
21
|
1
|
| 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 |
170 |
| Baker Hughes Incorporated | 5689 |
100 |
| Smith International, Inc. | 761 |
94 |
| Baker Hughes Holdings LLC | 3060 |
90 |
| Baker Hughes, a GE Company, LLC | 2171 |
63 |
| Schlumberger Technology Corporation | 9690 |
34 |
| US Synthetic Corporation | 601 |
28 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
18 |
| Schlumberger Canada Limited | 6913 |
13 |
| Saudi Arabian Oil Company | 11322 |
13 |
| National Oilwell DHT, L.P. | 159 |
12 |
| Ulterra Drilling Technologies, L.P. | 124 |
11 |
| Schlumberger Technology B.v. | 4951 |
10 |
| Services Petroliers Schlumberger | 5426 |
10 |
| CNPC USA Corp. | 109 |
8 |
| Vermeer Manufacturing Company | 615 |
8 |
| Boart Longyear Company | 262 |
7 |
| National Oilwell Varco, L.P. | 1604 |
6 |
| Longyear TM, Inc. | 139 |
5 |
| Schlumberger Holdings Limited | 2947 |
4 |
| Other owners | 143 |