Apparatus for autofill deactivation of float equipment and method of reverse cementing
US7357181B2 · kind B2 · utility
24Cited by
106References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2005 |
| Grant date | Apr 15, 2008 |
| Priority date | — |
| Expiry date | May 19, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for cementing a casing in a wellbore, the method having the following steps: attaching a valve to a casing; locking the valve in an open configuration; running the casing and the valve into the wellbore; reverse circulating a cement composition down an annulus defined between the casing and the wellbore; injecting a plurality of plugs into the annulus; unlocking the valve with the plurality of plugs; and closing the valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.