- 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: 1799
10-year publication summary
|
182
|
186
|
158
|
141
|
94
|
76
|
50
|
62
|
41
|
27
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Schlumberger Technology Corporation | 11584 |
78 |
| Itrec B.V. | 505 |
68 |
| National Oilwell Varco, L.P. | 1690 |
68 |
| Halliburton Energy Services, Inc. | 21257 |
63 |
| Weatherford Technology Holdings, LLC | 2072 |
56 |
| Cameron International Corporation | 1367 |
45 |
| Nabors Drilling Technologies USA, Inc. | 575 |
41 |
| Schlumberger Canada Limited | 7588 |
28 |
| Mhwirth AS | 131 |
27 |
| Schlumberger Technology B.v. | 5282 |
26 |
| Services Petroliers Schlumberger | 5996 |
26 |
| Technip France | 688 |
25 |
| Petroleo Brasileiro S.A. - Petrobras | 947 |
22 |
| Grant Prideco, Inc. | 434 |
21 |
| Vetco Gray, LLC | 147 |
21 |
| OneSubsea IP UK Limited | 433 |
18 |
| Single Buoy Moorings Inc. | 308 |
17 |
| Noble Drilling A/S | 52 |
17 |
| Baker Hughes Incorporated | 5018 |
16 |
| Saudi Arabian Oil Company | 13956 |
15 |
| Other owners | 1101 |