Junk basket and method of removing foreign material from a well
US4059155A · kind A · utility
75Cited by
8References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1976 |
| Grant date | Nov 22, 1977 |
| Priority date | — |
| Expiry date | Jul 19, 1996 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B31/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An improved junk basket comprises a tool body having a longitudinally extending passageway therethrough and a magnet assembly disposed in the passageway. A retainer is cooperative between the magnet assembly and the tool body to retain the magnet assembly in a lower position in the passageway and selectively releasable to permit longitudinal movement of the magnet assembly to an upper position in the passageway whereby core cutting apparatus and/or an improved reverse circulation system, also included in the tool, may be employed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.