Method and apparatus for filling and circulating fluid in a wellbore during casing running operations
US5584343A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 28, 1995 |
| Grant date | Dec 17, 1996 |
| Priority date | — |
| Expiry date | Apr 28, 2015 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/127
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and apparths for filling and circulating drilling fluid in a wellbore during casing running operations is disclosed. A fill/circulate tool is placed partially within the upper end of a casing string so that fluid may be pumped into the interior of the casing string. The tool has a self energizing seal element which engages the interior wall of the casing string when the tool is fully lowered therein, said seal element being energized by the pressure of the fluid in the casing string so that fluid pumped into the casing string through the tool is circulated through the casing string and explled from the lower end of the casing string.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.