- 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 33/00 - Sealing or packing boreholes or wells
Patent holdings for IPC class E21B 33/00
Total number of patents in this class: 384
10-year publication summary
|
34
|
35
|
40
|
34
|
20
|
8
|
5
|
6
|
1
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20862 |
49 |
| Baker Hughes Incorporated | 5273 |
18 |
| Schlumberger Technology Corporation | 10673 |
14 |
| Baker Hughes Holdings LLC | 3004 |
13 |
| Schlumberger Canada Limited | 7283 |
11 |
| Schlumberger Technology B.v. | 5164 |
11 |
| Schlumberger Holdings Limited | 2834 |
11 |
| Services Petroliers Schlumberger | 5775 |
11 |
| Cameron International Corporation | 1332 |
10 |
| Prad Research and Development Limited | 2693 |
10 |
| Vetco Gray, LLC | 153 |
9 |
| Baker Hughes, a GE Company, LLC | 2113 |
8 |
| National Oilwell Varco, L.P. | 1665 |
7 |
| Weatherford Technology Holdings, LLC | 2017 |
6 |
| FMC Technologies, Inc. | 601 |
6 |
| ConocoPhillips Company | 1676 |
5 |
| M-I L.L.C. | 812 |
5 |
| Saudi Arabian Oil Company | 12997 |
5 |
| Baker Hughes Oilfield Operations, LLC | 2289 |
5 |
| Grant Prideco, Inc. | 377 |
4 |
| Other owners | 166 |