- 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: 2068
10-year publication summary
|
172
|
162
|
179
|
176
|
184
|
180
|
121
|
80
|
95
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Weatherford Technology Holdings, LLC | 2109 |
189 |
| Halliburton Energy Services, Inc. | 20438 |
124 |
| Schlumberger Technology Corporation | 10263 |
99 |
| Nabors Drilling Technologies USA, Inc. | 547 |
78 |
| National Oilwell Varco, L.P. | 1627 |
72 |
| Frank's International, LLC | 239 |
61 |
| Schlumberger Canada Limited | 7154 |
49 |
| Baker Hughes Incorporated | 5504 |
47 |
| Services Petroliers Schlumberger | 5633 |
43 |
| Schlumberger Technology B.v. | 5075 |
41 |
| Forum US, Inc. | 330 |
33 |
| Noetic Technologies Inc. | 125 |
32 |
| Itrec B.V. | 495 |
27 |
| TT Technologies, Inc. | 149 |
23 |
| Saudi Arabian Oil Company | 12446 |
22 |
| Vermeer Manufacturing Company | 626 |
21 |
| National Oilwell Varco Norway AS | 109 |
20 |
| Cameron International Corporation | 1323 |
19 |
| Drillform Technical Services Ltd. | 41 |
18 |
| Grant Prideco, Inc. | 407 |
18 |
| Other owners | 1032 |