- 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 19/16 - Connecting or disconnecting pipe couplings or joints
Patent holdings for IPC class E21B 19/16
Total number of patents in this class: 2118
10-year publication summary
|
162
|
179
|
176
|
185
|
183
|
121
|
83
|
113
|
71
|
61
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Weatherford Technology Holdings, LLC | 2160 |
201 |
| Halliburton Energy Services, Inc. | 21305 |
120 |
| Schlumberger Technology Corporation | 11839 |
105 |
| Nabors Drilling Technologies USA, Inc. | 573 |
83 |
| National Oilwell Varco, L.P. | 1701 |
69 |
| Frank's International, LLC | 239 |
56 |
| Schlumberger Canada Limited | 7609 |
50 |
| Services Petroliers Schlumberger | 6028 |
46 |
| Baker Hughes Incorporated | 4922 |
44 |
| Schlumberger Technology B.v. | 5295 |
42 |
| Forum US, Inc. | 347 |
32 |
| Noetic Technologies Inc. | 132 |
31 |
| Itrec B.V. | 504 |
27 |
| TT Technologies, Inc. | 151 |
27 |
| Saudi Arabian Oil Company | 14275 |
22 |
| Vermeer Manufacturing Company | 674 |
22 |
| Canrig Robotic Technologies AS | 55 |
21 |
| Cameron International Corporation | 1370 |
20 |
| Drillform Technical Services Ltd. | 43 |
20 |
| National Oilwell Varco Norway AS | 107 |
19 |
| Other owners | 1061 |