- 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 33/126 - PackersPlugs with fluid-pressure-operated elastic cup or skirt
Patent holdings for IPC class E21B 33/126
Total number of patents in this class: 231
10-year publication summary
|
22
|
13
|
10
|
12
|
10
|
14
|
15
|
11
|
9
|
22
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20991 |
46 |
| Schlumberger Technology Corporation | 10930 |
15 |
| Rubberatkins Limited | 32 |
13 |
| Weatherford Technology Holdings, LLC | 2035 |
10 |
| Baker Hughes Oilfield Operations, LLC | 2344 |
10 |
| Schlumberger Canada Limited | 7383 |
7 |
| Baker Hughes Holdings LLC | 3015 |
7 |
| Schlumberger Technology B.v. | 5191 |
6 |
| Baker Hughes Incorporated | 5238 |
6 |
| Saudi Arabian Oil Company | 13442 |
6 |
| Services Petroliers Schlumberger | 5838 |
6 |
| Oil States Energy Services, L.L.C. | 77 |
3 |
| Pilot Drilling Control Limited | 11 |
3 |
| Saltel Industries | 64 |
3 |
| Thru Tubing Solutions, Inc. | 379 |
3 |
| Weatherford U.K. Limited | 71 |
3 |
| Welltec AS | 300 |
3 |
| Aramco Services Company | 4042 |
2 |
| China National Petroleum Corporation | 462 |
2 |
| CNPC USA Corp. | 163 |
2 |
| Other owners | 75 |