- 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 21/07 - Arrangements for treating drilling fluids outside the borehole for treating dust-laden gaseous fluids
Patent holdings for IPC class E21B 21/07
Total number of patents in this class: 37
10-year publication summary
|
2
|
0
|
1
|
1
|
3
|
0
|
0
|
3
|
3
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sandvik Mining and Construction Oy | 875 |
5 |
| Halliburton Energy Services, Inc. | 21242 |
4 |
| Siemens AG | 24177 |
2 |
| Erimek Oy | 7 |
2 |
| Black Diamond Oilfield Rentals LLC | 67 |
2 |
| Epiroc Rock Drills Aktiebolag | 629 |
2 |
| Schlumberger Canada Limited | 7571 |
1 |
| Schlumberger Technology B.v. | 5270 |
1 |
| Schlumberger Holdings Limited | 2730 |
1 |
| Baker Hughes Incorporated | 5033 |
1 |
| Smith International, Inc. | 700 |
1 |
| CFT GmbH Compact Filter Technic | 11 |
1 |
| Granbury Thompson Group, LLC | 9 |
1 |
| M-I L.L.C. | 768 |
1 |
| Milwaukee Electric Tool Corporation | 4845 |
1 |
| National Oilwell Varco, L.P. | 1689 |
1 |
| Prad Research and Development Limited | 2679 |
1 |
| Services Petroliers Schlumberger | 5981 |
1 |
| Southwest Petroleum University | 510 |
1 |
| Specialized Desanders Inc. | 43 |
1 |
| Other owners | 6 |