- 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 23/02 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing
Patent holdings for IPC class E21B 23/02
Total number of patents in this class: 585
10-year publication summary
|
67
|
44
|
65
|
41
|
33
|
36
|
23
|
34
|
30
|
12
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20901 |
84 |
| Baker Hughes Incorporated | 5241 |
51 |
| Cameron International Corporation | 1332 |
34 |
| Schlumberger Technology Corporation | 10727 |
33 |
| Weatherford Technology Holdings, LLC | 2023 |
32 |
| Saudi Arabian Oil Company | 13185 |
21 |
| Baker Hughes Oilfield Operations, LLC | 2305 |
14 |
| Schlumberger Canada Limited | 7296 |
12 |
| Schlumberger Technology B.v. | 5165 |
11 |
| Baker Hughes, a GE Company, LLC | 2112 |
11 |
| NCS Multistage Inc. | 177 |
10 |
| Services Petroliers Schlumberger | 5787 |
10 |
| Baker Hughes Holdings LLC | 3006 |
9 |
| Enventure Global Technology, L.L.C. | 89 |
7 |
| Evolution Engineering Inc. | 301 |
7 |
| Petroleum Technology Company AS | 99 |
7 |
| Robertson Intellectual Properties, LLC | 92 |
7 |
| Fhe USA LLC | 41 |
6 |
| Schlumberger Holdings Limited | 2822 |
5 |
| Cameron Technologies Limited | 211 |
5 |
| Other owners | 209 |