Retrievable screen device for drill pipe and the like
US4495073A · kind A · utility
90Cited by
8References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1983 |
| Grant date | Jan 22, 1985 |
| Priority date | — |
| Expiry date | Oct 21, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/24
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A mud screen for installation between any two selected ends of interconnected pipes, such as a drill pipe string, comprises a supporting collar anchored in the selected threaded connection of the drill pipe string and a screen support mounted on such collar and secured thereto by one or more releasing devices. An apertured inverted conical screen is supported by the screen support in transverse relationship to the pipe bore. A bridging element is secured across the screen support and defines a mounting for an upstanding post which functions as a manual handle and also defines a fishing neck at its upper end for downhole retrieval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.