- 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: 1802
10-year publication summary
|
164
|
176
|
143
|
123
|
85
|
66
|
50
|
56
|
38
|
6
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Schlumberger Technology Corporation | 11274 |
78 |
| National Oilwell Varco, L.P. | 1702 |
69 |
| Itrec B.V. | 505 |
68 |
| Halliburton Energy Services, Inc. | 21098 |
61 |
| Weatherford Technology Holdings, LLC | 2033 |
55 |
| Cameron International Corporation | 1357 |
45 |
| Nabors Drilling Technologies USA, Inc. | 565 |
38 |
| Schlumberger Canada Limited | 7487 |
28 |
| Mhwirth AS | 130 |
27 |
| Schlumberger Technology B.v. | 5245 |
26 |
| Services Petroliers Schlumberger | 5923 |
26 |
| Technip France | 694 |
26 |
| Grant Prideco, Inc. | 417 |
21 |
| Vetco Gray, LLC | 150 |
21 |
| Petroleo Brasileiro S.A. - Petrobras | 906 |
20 |
| OneSubsea IP UK Limited | 429 |
18 |
| Single Buoy Moorings Inc. | 312 |
17 |
| Noble Drilling A/S | 51 |
17 |
| Baker Hughes Incorporated | 5109 |
16 |
| Saudi Arabian Oil Company | 13857 |
15 |
| Other owners | 1110 |