Circulation tool
US6253861A · kind A · utility
192Cited by
7References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1999 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Feb 25, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B37/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A tool or sub for use in a well bore is adapted to manipulate the circulation path of fluid through a drill string or work string in which the tool is connected. The apparatus has a body member defining an axial flow path with one or more radial outlets that may be opened or closed by respective valve members in use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.