- 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: 282
10-year publication summary
|
11
|
9
|
11
|
8
|
13
|
3
|
8
|
11
|
8
|
7
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21151 |
31 |
| Baker Hughes Incorporated | 5075 |
16 |
| Epiroc Rock Drills Aktiebolag | 606 |
12 |
| Robert Bosch GmbH | 43449 |
9 |
| Sandvik Mining and Construction Oy | 864 |
9 |
| Frank's International, LLC | 238 |
7 |
| Nabors Drilling Technologies USA, Inc. | 571 |
7 |
| Schlumberger Canada Limited | 7552 |
5 |
| Schlumberger Technology B.v. | 5265 |
5 |
| Schlumberger Holdings Limited | 2747 |
5 |
| Caterpillar Global Mining Equipment LLC | 174 |
5 |
| National Oilwell Varco, L.P. | 1701 |
5 |
| Prad Research and Development Limited | 2680 |
5 |
| Services Petroliers Schlumberger | 5969 |
5 |
| The Wellboss Company, LLC | 112 |
5 |
| Schlumberger Technology Corporation | 11423 |
4 |
| Black & Decker, Inc. | 2424 |
4 |
| National Boss Hog Energy Services LLC | 4 |
4 |
| Premiere, Inc. | 17 |
4 |
| Sandvik Mining and Construction USA, LLC | 14 |
4 |
| Other owners | 131 |