- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 19/15 - Racking of rods in horizontal position; Handling between horizontal and vertical position
Patent holdings for IPC class E21B 19/15
Total number of patents in this class: 555
10-year publication summary
|
53
|
56
|
45
|
44
|
62
|
49
|
54
|
58
|
33
|
6
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Schlumberger Technology Corporation | 9690 |
32 |
| Itrec B.V. | 477 |
31 |
| Nabors Drilling Technologies USA, Inc. | 533 |
27 |
| Forum US, Inc. | 315 |
19 |
| Mhwirth AS | 113 |
17 |
| National Oilwell Varco, L.P. | 1604 |
17 |
| Canrig Robotic Technologies AS | 47 |
17 |
| Axis Energy Services, LLC | 23 |
12 |
| Key Energy Services, LLC | 50 |
11 |
| Frank's International, LLC | 241 |
10 |
| TT Technologies, Inc. | 145 |
10 |
| The Charles Machine Works, Inc. | 411 |
9 |
| Vermeer Manufacturing Company | 615 |
9 |
| Schlumberger Canada Limited | 6913 |
8 |
| Schlumberger Technology B.v. | 4951 |
8 |
| Sandvik Intellectual Property AB | 1634 |
8 |
| Services Petroliers Schlumberger | 5426 |
8 |
| Sichuan Honghua Petroleum Equipment Co. Ltd. | 71 |
8 |
| Boart Longyear Company | 262 |
8 |
| Coax Technology Inc. | 7 |
7 |
| Other owners | 279 |