- 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 17/12 - Devices for placing or drawing out wear protectors
Patent holdings for IPC class E21B 17/12
Total number of patents in this class: 43
10-year publication summary
|
4
|
6
|
8
|
6
|
1
|
1
|
2
|
2
|
1
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Weatherford Technology Holdings, LLC | 2014 |
4 |
| Halliburton Energy Services, Inc. | 20749 |
3 |
| Cameron International Corporation | 1329 |
3 |
| ConocoPhillips Company | 1676 |
2 |
| ACE Well Technology AS | 3 |
2 |
| Schlumberger Technology Corporation | 10627 |
1 |
| Schlumberger Canada Limited | 7235 |
1 |
| Schlumberger Technology B.v. | 5148 |
1 |
| Schlumberger Holdings Limited | 2841 |
1 |
| Chevron U.S.A. Inc. | 3929 |
1 |
| ATT Technology, Ltd. | 13 |
1 |
| Dril-Quip, Inc. | 40 |
1 |
| GE Oil & Gas Pressure Control LP | 75 |
1 |
| Halliburton Manufacturing & Services Limited | 17 |
1 |
| Nabors Drilling Technologies USA, Inc. | 555 |
1 |
| Oceaneering International, Inc. | 425 |
1 |
| Prad Research and Development Limited | 2694 |
1 |
| Probe Technology Services, Inc. | 36 |
1 |
| Saudi Arabian Oil Company | 12858 |
1 |
| Services Petroliers Schlumberger | 5756 |
1 |
| Other owners | 14 |