- 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 19/00 - Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrickApparatus for feeding the rods or cables
Patent holdings for IPC class E21B 19/00
Total number of patents in this class: 1797
10-year publication summary
|
195
|
182
|
186
|
158
|
141
|
94
|
76
|
49
|
57
|
18
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Schlumberger Technology Corporation | 10627 |
76 |
| National Oilwell Varco, L.P. | 1646 |
69 |
| Itrec B.V. | 502 |
68 |
| Halliburton Energy Services, Inc. | 20749 |
61 |
| Weatherford Technology Holdings, LLC | 2014 |
55 |
| Cameron International Corporation | 1329 |
45 |
| Nabors Drilling Technologies USA, Inc. | 555 |
37 |
| Mhwirth AS | 129 |
28 |
| Schlumberger Canada Limited | 7235 |
27 |
| Technip France | 706 |
26 |
| Schlumberger Technology B.v. | 5148 |
25 |
| Services Petroliers Schlumberger | 5756 |
25 |
| FMC Kongsberg Subsea AS | 251 |
22 |
| Vetco Gray, LLC | 153 |
21 |
| Grant Prideco, Inc. | 375 |
20 |
| OneSubsea IP UK Limited | 416 |
18 |
| Petroleo Brasileiro S.A. - Petrobras | 824 |
18 |
| Baker Hughes Incorporated | 5289 |
17 |
| Single Buoy Moorings Inc. | 319 |
17 |
| Noble Drilling A/S | 49 |
17 |
| Other owners | 1105 |