- 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 43/112 - Perforators with extendable perforating members, e.g. actuated by fluid means
Patent holdings for IPC class E21B 43/112
Total number of patents in this class: 211
10-year publication summary
|
6
|
12
|
19
|
11
|
11
|
12
|
9
|
8
|
11
|
3
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21153 |
21 |
| Saudi Arabian Oil Company | 13921 |
21 |
| Baker Hughes Incorporated | 5082 |
12 |
| Shell Internationale Research Maatschappij B.V. | 3493 |
12 |
| Schlumberger Technology Corporation | 11404 |
9 |
| Shell USA, Inc. | 1282 |
9 |
| Welltec AS | 303 |
8 |
| Schlumberger Canada Limited | 7550 |
7 |
| Schlumberger Technology B.v. | 5263 |
7 |
| Services Petroliers Schlumberger | 5966 |
7 |
| Aramco Services Company | 4164 |
5 |
| Passerby Inc. | 6 |
5 |
| Exacta-Frac Energy Services, Inc. | 55 |
4 |
| Kuzyaev, Salavat Anatolyevich, Mr. | 4 |
4 |
| Baker Hughes Holdings LLC | 2981 |
4 |
| Aarbakke Innovation A.S. | 30 |
3 |
| Geodynamics, Inc. | 195 |
3 |
| Paul Bernard Lee | 3 |
3 |
| Odfjell Technology Invest Ltd | 25 |
3 |
| General Electric Company | 13811 |
2 |
| Other owners | 62 |