Apparatus and method for circulating fluid in a well bore
US6279657A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1998 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Oct 14, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/103
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A circulating tool for circulating fluid in a borehole comprising a tubular assembly having an axial through passage between an inlet and a first outlet, a second outlet extending generally transversely of the tubular assembly, and an obturating member moveable relative to the tubular assembly between a first position closing the second outlet and a second position at which the second outlet is open, wherein the obturating member is also moveable between an engaging position at which it is engaged with the tubular assembly and a non-engaging position at which it is not so engaged with the tubular assembly, and wherein when the obturating member is in the first position it may be in either the engaging position or the non-engaging position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.