- 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 19/18 - Connecting or disconnecting drill bit and drilling pipe
Patent holdings for IPC class E21B 19/18
Total number of patents in this class: 281
10-year publication summary
|
13
|
11
|
9
|
11
|
8
|
13
|
3
|
8
|
11
|
8
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21015 |
33 |
| Baker Hughes Incorporated | 5183 |
16 |
| Epiroc Rock Drills Aktiebolag | 557 |
12 |
| Robert Bosch GmbH | 43001 |
9 |
| Sandvik Mining and Construction Oy | 838 |
8 |
| Frank's International, LLC | 240 |
7 |
| Nabors Drilling Technologies USA, Inc. | 562 |
7 |
| National Oilwell Varco, L.P. | 1694 |
6 |
| Schlumberger Canada Limited | 7416 |
5 |
| Schlumberger Technology B.v. | 5215 |
5 |
| Schlumberger Holdings Limited | 2793 |
5 |
| Black & Decker, Inc. | 2407 |
5 |
| Caterpillar Global Mining Equipment LLC | 165 |
5 |
| Prad Research and Development Limited | 2688 |
5 |
| Services Petroliers Schlumberger | 5872 |
5 |
| The Wellboss Company, LLC | 108 |
5 |
| Schlumberger Technology Corporation | 11013 |
4 |
| National Boss Hog Energy Services LLC | 4 |
4 |
| Premiere, Inc. | 17 |
4 |
| Falcon Tools, LLC | 4 |
4 |
| Other owners | 127 |