- 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 7/20 - Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
Patent holdings for IPC class E21B 7/20
Total number of patents in this class: 619
10-year publication summary
|
62
|
56
|
63
|
55
|
46
|
30
|
32
|
32
|
25
|
3
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20165 |
30 |
| Shell Internationale Research Maatschappij B.V. | 3792 |
22 |
| Baker Hughes Incorporated | 5689 |
20 |
| Schlumberger Technology Corporation | 9690 |
19 |
| Saudi Arabian Oil Company | 11322 |
17 |
| Herrenknecht AG | 186 |
15 |
| Tracto-Technik GmbH & Co. KG | 166 |
13 |
| Vermeer Manufacturing Company | 615 |
13 |
| Weatherford Technology Holdings, LLC | 2135 |
12 |
| Schlumberger Canada Limited | 6913 |
11 |
| Oy Atlas Copco Rotex Ab | 18 |
11 |
| The Charles Machine Works, Inc. | 411 |
10 |
| Thru Tubing Solutions, Inc. | 361 |
10 |
| Mincon Nordic Oy | 13 |
10 |
| Schlumberger Technology B.v. | 4951 |
9 |
| Services Petroliers Schlumberger | 5426 |
9 |
| Baker Hughes Holdings LLC | 3060 |
9 |
| Shell Oil Company | 2196 |
8 |
| Deep Casing Tools, Ltd. | 35 |
8 |
| Tesco Corporation | 73 |
8 |
| Other owners | 355 |