- 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: 2086
10-year publication summary
|
135
|
138
|
149
|
143
|
160
|
154
|
103
|
71
|
92
|
51
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Weatherford Technology Holdings, LLC | 2033 |
189 |
| Halliburton Energy Services, Inc. | 21078 |
123 |
| Schlumberger Technology Corporation | 11054 |
101 |
| Nabors Drilling Technologies USA, Inc. | 564 |
82 |
| National Oilwell Varco, L.P. | 1699 |
72 |
| Frank's International, LLC | 240 |
57 |
| Schlumberger Canada Limited | 7432 |
49 |
| Baker Hughes Incorporated | 5175 |
45 |
| Services Petroliers Schlumberger | 5884 |
44 |
| Schlumberger Technology B.v. | 5223 |
41 |
| Forum US, Inc. | 341 |
32 |
| Noetic Technologies Inc. | 124 |
30 |
| Itrec B.V. | 505 |
27 |
| TT Technologies, Inc. | 151 |
25 |
| Saudi Arabian Oil Company | 13656 |
22 |
| Vermeer Manufacturing Company | 649 |
21 |
| Canrig Robotic Technologies AS | 54 |
20 |
| Cameron International Corporation | 1353 |
19 |
| Drillform Technical Services Ltd. | 42 |
19 |
| National Oilwell Varco Norway AS | 107 |
19 |
| Other owners | 1049 |