- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining 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: 2016
10-year publication summary
|
177
|
172
|
162
|
179
|
176
|
182
|
177
|
121
|
74
|
22
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Weatherford Technology Holdings, LLC | 2135 |
180 |
| Halliburton Energy Services, Inc. | 20165 |
122 |
| Schlumberger Technology Corporation | 9690 |
95 |
| Nabors Drilling Technologies USA, Inc. | 533 |
74 |
| National Oilwell Varco, L.P. | 1604 |
71 |
| Frank's International, LLC | 241 |
61 |
| Schlumberger Canada Limited | 6913 |
48 |
| Baker Hughes Incorporated | 5689 |
47 |
| Services Petroliers Schlumberger | 5426 |
42 |
| Schlumberger Technology B.v. | 4951 |
40 |
| Noetic Technologies Inc. | 126 |
31 |
| Forum US, Inc. | 315 |
29 |
| Itrec B.V. | 477 |
26 |
| Saudi Arabian Oil Company | 11322 |
21 |
| Cameron International Corporation | 1305 |
20 |
| National Oilwell Varco Norway AS | 109 |
20 |
| McCoy Global Inc. | 52 |
19 |
| TT Technologies, Inc. | 145 |
19 |
| Canrig Robotic Technologies AS | 47 |
18 |
| Drillform Technical Services Ltd. | 37 |
17 |
| Other owners | 1016 |