Reverse-circulation cementing of surface casing
US7654324B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2007 |
| Grant date | Feb 2, 2010 |
| Priority date | — |
| Expiry date | Mar 31, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for reverse circulation cementing of surface casing in subterranean formations and associated methods are provided. One example of a method may involve a method of reverse circulation cementing a surface casing in a well bore with a conductor casing positioned therein comprising: providing a tool comprising at least one isolation device coupled to the surface casing; positioning the isolation device in the well bore to isolate an annulus between the surface casing and the conductor casing; flowing cement through a port in the conductor casing in a reverse circulation direction; and allowing the cement to set therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.