- 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 33/127 - PackersPlugs with inflatable sleeve
Patent holdings for IPC class E21B 33/127
Total number of patents in this class: 982
10-year publication summary
|
80
|
57
|
103
|
70
|
57
|
75
|
58
|
51
|
35
|
20
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21305 |
185 |
| Saudi Arabian Oil Company | 14275 |
76 |
| Schlumberger Technology Corporation | 11839 |
58 |
| Welltec Manufacturing Center Completions ApS | 95 |
52 |
| Welltec AS | 318 |
46 |
| Schlumberger Canada Limited | 7609 |
41 |
| Welltec Oilfield Solutions AG | 64 |
38 |
| Schlumberger Technology B.v. | 5295 |
32 |
| Services Petroliers Schlumberger | 6028 |
31 |
| Saltel Industries | 61 |
30 |
| Baker Hughes Incorporated | 4922 |
22 |
| Baker Hughes Oilfield Operations, LLC | 2534 |
22 |
| Baker Hughes, a GE Company, LLC | 2051 |
21 |
| Baker Hughes Holdings LLC | 3023 |
17 |
| Schlumberger Holdings Limited | 2690 |
16 |
| Prad Research and Development Limited | 2655 |
16 |
| TAM International, Inc. | 65 |
15 |
| Aramco Services Company | 4194 |
13 |
| Halliburton Manufacturing and Services Limited | 58 |
10 |
| Vertice Oil Tools Inc. | 96 |
10 |
| Other owners | 231 |