Tool for use in retrieving an essentially cylindrical object from a well bore
US5765638A · kind A · utility
44Cited by
3References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 26, 1996 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Dec 26, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B31/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
There are disclosed two embodiments of a tool for use in retrieving a cylindrical object which is stuck within a well bore, or, in the event the object cannot be retrieved, releasing therefrom to permit recovery of the tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.