- 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 23/00 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
Patent holdings for IPC class E21B 23/00
Total number of patents in this class: 2635
10-year publication summary
|
191
|
175
|
147
|
172
|
145
|
107
|
105
|
91
|
106
|
27
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21217 |
390 |
| Schlumberger Technology Corporation | 11485 |
139 |
| Saudi Arabian Oil Company | 13953 |
129 |
| Baker Hughes Incorporated | 5041 |
128 |
| Schlumberger Canada Limited | 7558 |
92 |
| Weatherford Technology Holdings, LLC | 2068 |
86 |
| Schlumberger Technology B.v. | 5267 |
79 |
| Services Petroliers Schlumberger | 5977 |
79 |
| Baker Hughes, a GE Company, LLC | 2094 |
68 |
| Baker Hughes Oilfield Operations, LLC | 2441 |
63 |
| Baker Hughes Holdings LLC | 2992 |
55 |
| Cameron International Corporation | 1368 |
48 |
| Welltec AS | 309 |
45 |
| Aramco Services Company | 4162 |
38 |
| Schlumberger Holdings Limited | 2735 |
37 |
| Thru Tubing Solutions, Inc. | 393 |
37 |
| Prad Research and Development Limited | 2679 |
33 |
| Enventure Global Technology, L.L.C. | 80 |
21 |
| Qinterra Technologies AS | 36 |
17 |
| NCS Multistage Inc. | 173 |
14 |
| Other owners | 1037 |