- 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: 2063
10-year publication summary
|
172
|
162
|
179
|
176
|
185
|
181
|
121
|
83
|
99
|
31
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Weatherford Technology Holdings, LLC | 2015 |
187 |
| Halliburton Energy Services, Inc. | 20835 |
123 |
| Schlumberger Technology Corporation | 10662 |
98 |
| Nabors Drilling Technologies USA, Inc. | 557 |
80 |
| National Oilwell Varco, L.P. | 1661 |
69 |
| Frank's International, LLC | 238 |
58 |
| Schlumberger Canada Limited | 7273 |
48 |
| Baker Hughes Incorporated | 5277 |
46 |
| Services Petroliers Schlumberger | 5772 |
43 |
| Schlumberger Technology B.v. | 5161 |
41 |
| Forum US, Inc. | 337 |
32 |
| Noetic Technologies Inc. | 121 |
29 |
| Itrec B.V. | 503 |
27 |
| TT Technologies, Inc. | 150 |
23 |
| Saudi Arabian Oil Company | 12947 |
22 |
| Vermeer Manufacturing Company | 635 |
21 |
| Canrig Robotic Technologies AS | 54 |
20 |
| Cameron International Corporation | 1332 |
19 |
| National Oilwell Varco Norway AS | 108 |
19 |
| Drillform Technical Services Ltd. | 41 |
18 |
| Other owners | 1040 |