- 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 33/08 - Wipers; Oil savers
Patent holdings for IPC class E21B 33/08
Total number of patents in this class: 520
10-year publication summary
55
|
52
|
57
|
57
|
44
|
43
|
47
|
42
|
25
|
8
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Weatherford Technology Holdings, LLC | 2135 |
79 |
Halliburton Energy Services, Inc. | 20165 |
37 |
Grant Prideco, Inc. | 384 |
34 |
Pruitt Tool & Supply Co. | 55 |
30 |
Schlumberger Technology Corporation | 9690 |
28 |
Mako Rentals, Inc. | 61 |
16 |
Anti-Pollution Technology, L.P. | 16 |
11 |
Schlumberger Canada Limited | 6913 |
10 |
Schlumberger Technology B.v. | 4951 |
10 |
National Oilwell Varco, L.P. | 1604 |
10 |
Services Petroliers Schlumberger | 5426 |
10 |
Katch Kan Holdings Ltd. | 52 |
9 |
Reform Energy Services Corp. | 12 |
7 |
Saudi Arabian Oil Company | 11322 |
7 |
Siem Wis AS | 16 |
6 |
Weatherford / Lamb, Inc. | 158 |
6 |
Baker Hughes Holdings LLC | 3060 |
6 |
Baker Hughes Incorporated | 5689 |
5 |
Cameron International Corporation | 1305 |
5 |
Electrical Subsea & Drilling AS | 41 |
5 |
Other owners | 189 |