Apparatus and method for reverse circulation cementing a casing in an open-hole wellbore
US7225871B2 · kind B2 · utility
6Cited by
4References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2005 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Oct 21, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system for cementing a casing in an open wellbore having no surface casing, wherein an annulus is defined between the casing and the wellbore, the system having: an annular plug around the casing at the mouth of the wellbore; a cement composition pump fluidly connected to the annulus through the seal; and a coupling connected to the exposed end of the casing for taking circulation fluid returns from the inner diameter of the casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.