- 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 17/18 - Pipes provided with plural fluid passages
Patent holdings for IPC class E21B 17/18
Total number of patents in this class: 525
10-year publication summary
|
38
|
38
|
35
|
37
|
63
|
33
|
30
|
20
|
13
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21257 |
112 |
| Saudi Arabian Oil Company | 13956 |
27 |
| Schlumberger Technology Corporation | 11584 |
24 |
| Baker Hughes Incorporated | 5018 |
16 |
| Vermeer Manufacturing Company | 667 |
13 |
| Weatherford Technology Holdings, LLC | 2072 |
11 |
| Reelwell AS | 66 |
11 |
| Baker Hughes, a GE Company, LLC | 2091 |
11 |
| The Charles Machine Works, Inc. | 416 |
10 |
| Baker Hughes Oilfield Operations, LLC | 2480 |
10 |
| Aramco Services Company | 4162 |
8 |
| Schlumberger Canada Limited | 7588 |
7 |
| FMC Technologies, Inc. | 610 |
7 |
| Schlumberger Technology B.v. | 5282 |
6 |
| Services Petroliers Schlumberger | 5996 |
6 |
| Rig Technologies International Pty Ltd | 13 |
6 |
| Schlumberger Holdings Limited | 2724 |
4 |
| ExxonMobil Upstream Research Company | 2331 |
4 |
| Hypersciences, Inc. | 40 |
4 |
| Prad Research and Development Limited | 2678 |
4 |
| Other owners | 224 |