- 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 10/42 - 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: 877
10-year publication summary
|
117
|
93
|
95
|
58
|
40
|
37
|
23
|
13
|
18
|
8
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21293 |
171 |
| Baker Hughes Incorporated | 4952 |
97 |
| Smith International, Inc. | 696 |
93 |
| Baker Hughes Holdings LLC | 2990 |
86 |
| Baker Hughes, a GE Company, LLC | 2105 |
63 |
| Schlumberger Technology Corporation | 11730 |
41 |
| US Synthetic Corporation | 621 |
27 |
| Baker Hughes Oilfield Operations, LLC | 2524 |
19 |
| Saudi Arabian Oil Company | 14135 |
18 |
| Ulterra Drilling Technologies, L.P. | 129 |
18 |
| National Oilwell Varco, L.P. | 1699 |
13 |
| Schlumberger Canada Limited | 7602 |
12 |
| Services Petroliers Schlumberger | 6020 |
11 |
| Schlumberger Technology B.v. | 5297 |
10 |
| Vermeer Manufacturing Company | 670 |
10 |
| National Oilwell DHT, L.P. | 120 |
9 |
| CNPC USA Corp. | 181 |
8 |
| Longyear TM, Inc. | 97 |
5 |
| Boart Longyear Manufacturing and Distribution Inc. | 127 |
5 |
| Schlumberger Holdings Limited | 2708 |
4 |
| Other owners | 157 |