- 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 19/00 - Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
Patent holdings for IPC class E21B 19/00
Total number of patents in this class: 1814
10-year publication summary
|
204
|
195
|
182
|
186
|
158
|
141
|
94
|
74
|
46
|
17
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| National Oilwell Varco, L.P. | 1604 |
72 |
| Schlumberger Technology Corporation | 9690 |
71 |
| Itrec B.V. | 477 |
68 |
| Halliburton Energy Services, Inc. | 20165 |
59 |
| Weatherford Technology Holdings, LLC | 2135 |
54 |
| Cameron International Corporation | 1305 |
47 |
| Nabors Drilling Technologies USA, Inc. | 533 |
38 |
| Schlumberger Canada Limited | 6913 |
26 |
| Mhwirth AS | 113 |
26 |
| Technip France | 737 |
26 |
| Schlumberger Technology B.v. | 4951 |
23 |
| FMC Kongsberg Subsea AS | 251 |
23 |
| Services Petroliers Schlumberger | 5426 |
23 |
| Grant Prideco, Inc. | 384 |
21 |
| Vetco Gray, LLC | 161 |
21 |
| Baker Hughes Incorporated | 5689 |
18 |
| Dril-Quip, Inc. | 155 |
18 |
| OneSubsea IP UK Limited | 378 |
18 |
| Single Buoy Moorings Inc. | 327 |
18 |
| Petroleo Brasileiro S.A. - Petrobras | 730 |
17 |
| Other owners | 1127 |