- 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
|
17
|
14
|
14
|
13
|
9
|
15
|
4
|
9
|
11
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20672 |
33 |
| Baker Hughes Incorporated | 5301 |
16 |
| Epiroc Rock Drills Aktiebolag | 489 |
11 |
| Robert Bosch GmbH | 42296 |
9 |
| Nabors Drilling Technologies USA, Inc. | 556 |
8 |
| Frank's International, LLC | 237 |
7 |
| Sandvik Mining and Construction Oy | 802 |
7 |
| National Oilwell Varco, L.P. | 1634 |
6 |
| Schlumberger Canada Limited | 7190 |
5 |
| Schlumberger Technology B.v. | 5130 |
5 |
| Schlumberger Holdings Limited | 2847 |
5 |
| Black & Decker, Inc. | 2396 |
5 |
| Weatherford Technology Holdings, LLC | 2010 |
5 |
| Prad Research and Development Limited | 2695 |
5 |
| Services Petroliers Schlumberger | 5731 |
5 |
| The Wellboss Company, LLC | 103 |
5 |
| Schlumberger Technology Corporation | 10567 |
4 |
| Caterpillar Global Mining Equipment LLC | 151 |
4 |
| National Boss Hog Energy Services LLC | 4 |
4 |
| Premiere, Inc. | 17 |
4 |
| Other owners | 129 |