- 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: 2070
10-year publication summary
|
135
|
138
|
149
|
143
|
160
|
154
|
103
|
71
|
92
|
34
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Weatherford Technology Holdings, LLC | 2027 |
189 |
| Halliburton Energy Services, Inc. | 20924 |
123 |
| Schlumberger Technology Corporation | 10802 |
100 |
| Nabors Drilling Technologies USA, Inc. | 561 |
81 |
| National Oilwell Varco, L.P. | 1683 |
72 |
| Frank's International, LLC | 240 |
58 |
| Schlumberger Canada Limited | 7343 |
48 |
| Baker Hughes Incorporated | 5265 |
46 |
| Services Petroliers Schlumberger | 5811 |
43 |
| Schlumberger Technology B.v. | 5182 |
41 |
| Forum US, Inc. | 337 |
32 |
| Noetic Technologies Inc. | 125 |
30 |
| Itrec B.V. | 503 |
27 |
| TT Technologies, Inc. | 151 |
23 |
| Saudi Arabian Oil Company | 13263 |
22 |
| Vermeer Manufacturing Company | 639 |
21 |
| Canrig Robotic Technologies AS | 54 |
20 |
| Cameron International Corporation | 1336 |
19 |
| National Oilwell Varco Norway AS | 107 |
19 |
| Drillform Technical Services Ltd. | 41 |
18 |
| Other owners | 1038 |