- 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: 529
10-year publication summary
|
33
|
31
|
29
|
35
|
50
|
25
|
25
|
16
|
11
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21098 |
112 |
| Saudi Arabian Oil Company | 13857 |
27 |
| Schlumberger Technology Corporation | 11274 |
24 |
| Baker Hughes Incorporated | 5109 |
16 |
| Vermeer Manufacturing Company | 655 |
14 |
| Weatherford Technology Holdings, LLC | 2033 |
12 |
| Reelwell AS | 67 |
11 |
| Baker Hughes, a GE Company, LLC | 2105 |
11 |
| The Charles Machine Works, Inc. | 415 |
10 |
| Baker Hughes Oilfield Operations, LLC | 2405 |
10 |
| Aramco Services Company | 4157 |
8 |
| Schlumberger Canada Limited | 7487 |
7 |
| FMC Technologies, Inc. | 605 |
7 |
| Schlumberger Technology B.v. | 5245 |
6 |
| Services Petroliers Schlumberger | 5923 |
6 |
| Rig Technologies International Pty Ltd | 13 |
6 |
| Schlumberger Holdings Limited | 2754 |
4 |
| ExxonMobil Upstream Research Company | 2358 |
4 |
| Prad Research and Development Limited | 2684 |
4 |
| Chevron U.S.A. Inc. | 4048 |
3 |
| Other owners | 227 |