- 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 19/15 - Racking of rods in horizontal positionHandling between horizontal and vertical position
Patent holdings for IPC class E21B 19/15
Total number of patents in this class: 588
10-year publication summary
|
45
|
44
|
62
|
50
|
55
|
58
|
35
|
32
|
26
|
10
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Schlumberger Technology Corporation | 11592 |
34 |
| Nabors Drilling Technologies USA, Inc. | 577 |
33 |
| Itrec B.V. | 505 |
28 |
| National Oilwell Varco, L.P. | 1692 |
20 |
| Forum US, Inc. | 345 |
18 |
| Mhwirth AS | 131 |
18 |
| Canrig Robotic Technologies AS | 54 |
18 |
| Epiroc Rock Drills Aktiebolag | 637 |
14 |
| TT Technologies, Inc. | 153 |
13 |
| Axis Energy Services, LLC | 28 |
12 |
| Frank's International, LLC | 239 |
11 |
| Key Energy Services, LLC | 43 |
11 |
| The Charles Machine Works, Inc. | 416 |
10 |
| Vermeer Manufacturing Company | 667 |
10 |
| Schlumberger Canada Limited | 7587 |
9 |
| Schlumberger Technology B.v. | 5282 |
9 |
| Services Petroliers Schlumberger | 5995 |
9 |
| Sichuan Honghua Petroleum Equipment Co. Ltd. | 76 |
9 |
| Drillform Technical Services Ltd. | 42 |
8 |
| Coax Technology Inc. | 7 |
7 |
| Other owners | 287 |