- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 33/02 - Surface sealing or packing
Patent holdings for IPC class E21B 33/02
Total number of patents in this class: 194
10-year publication summary
18
|
26
|
15
|
12
|
11
|
14
|
8
|
8
|
11
|
1
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Halliburton Energy Services, Inc. | 20165 |
21 |
Cameron International Corporation | 1305 |
13 |
Weatherford Technology Holdings, LLC | 2135 |
8 |
Saudi Arabian Oil Company | 11322 |
7 |
Schlumberger Technology Corporation | 9690 |
6 |
Schlumberger Canada Limited | 6913 |
5 |
Newpark Mats & Integrated Services LLC | 80 |
5 |
Pruitt Tool & Supply Co. | 55 |
5 |
Schlumberger Technology B.v. | 4951 |
4 |
Grant Prideco, Inc. | 384 |
4 |
Services Petroliers Schlumberger | 5426 |
4 |
Schlumberger Holdings Limited | 2947 |
3 |
Aramco Services Company | 3504 |
3 |
Oil Lift Technology Inc. | 19 |
3 |
Prad Research and Development Limited | 2696 |
3 |
Q.E.D. Environmental Systems, Inc. | 86 |
3 |
Aker Subsea AS | 130 |
2 |
Anti-Pollution Technology, L.P. | 16 |
2 |
CAR-BER Investments Inc. | 19 |
2 |
ConocoPhillips Company | 1657 |
2 |
Other owners | 89 |