Reverse circulation cementing system and method
US6920929B2 · kind B2 · utility
36Cited by
18References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 12, 2003 |
| Grant date | Jul 26, 2005 |
| Priority date | — |
| Expiry date | Aug 9, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system and method of cementing in an annulus formed between a casing and the wall of a well bore, wherein a foamed cement is introduced into the upper portion of the annulus, directed downwardly through the annulus and back up into the casing, and then displaced back down the casing and into the annulus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.