- 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: 868
10-year publication summary
|
128
|
103
|
80
|
83
|
55
|
34
|
34
|
22
|
12
|
9
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20908 |
172 |
| Baker Hughes Incorporated | 5238 |
98 |
| Smith International, Inc. | 717 |
93 |
| Baker Hughes Holdings LLC | 3005 |
86 |
| Baker Hughes, a GE Company, LLC | 2112 |
63 |
| Schlumberger Technology Corporation | 10745 |
38 |
| US Synthetic Corporation | 624 |
29 |
| Saudi Arabian Oil Company | 13206 |
18 |
| Baker Hughes Oilfield Operations, LLC | 2313 |
17 |
| Ulterra Drilling Technologies, L.P. | 124 |
15 |
| Schlumberger Canada Limited | 7298 |
12 |
| National Oilwell Varco, L.P. | 1669 |
12 |
| Services Petroliers Schlumberger | 5788 |
11 |
| Schlumberger Technology B.v. | 5163 |
10 |
| National Oilwell DHT, L.P. | 129 |
9 |
| CNPC USA Corp. | 157 |
8 |
| Vermeer Manufacturing Company | 634 |
8 |
| Longyear TM, Inc. | 101 |
5 |
| Schlumberger Holdings Limited | 2819 |
4 |
| Kennametal Inc. | 1387 |
4 |
| Other owners | 156 |