- 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: 528
10-year publication summary
|
45
|
33
|
31
|
29
|
35
|
49
|
25
|
25
|
17
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20924 |
112 |
| Saudi Arabian Oil Company | 13263 |
25 |
| Schlumberger Technology Corporation | 10802 |
23 |
| Baker Hughes Incorporated | 5265 |
16 |
| Vermeer Manufacturing Company | 639 |
14 |
| Weatherford Technology Holdings, LLC | 2027 |
12 |
| Reelwell AS | 67 |
11 |
| Baker Hughes, a GE Company, LLC | 2110 |
11 |
| The Charles Machine Works, Inc. | 408 |
10 |
| Baker Hughes Oilfield Operations, LLC | 2304 |
10 |
| Schlumberger Canada Limited | 7343 |
7 |
| Aramco Services Company | 3993 |
7 |
| FMC Technologies, Inc. | 610 |
7 |
| Rig Technologies International Pty Ltd | 15 |
7 |
| Schlumberger Technology B.v. | 5182 |
6 |
| Services Petroliers Schlumberger | 5811 |
6 |
| Ior Canada Ltd. | 15 |
5 |
| Schlumberger Holdings Limited | 2816 |
4 |
| ExxonMobil Upstream Research Company | 2395 |
4 |
| Flexidrill Limited | 47 |
4 |
| Other owners | 227 |