Plug-dropping container for releasing a plug into a wellbore
US7055611B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2003 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | Feb 19, 2024 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/05
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A plug-dropping container used for releasing plugs or other objects into a wellbore during fluid circulation procedures. In one aspect, the plug-dropping container is used as part of a cementing head. The plug-dropping container comprises an elongated housing, and a canister disposed co-axially within the housing. The canister is configured to receive the plug, such as a drill pipe dart. A valve is disposed below the canister. The valve is movable from a plug-retained position where the plug is blocked, to a plug-released position where the plug may be released into the wellbore there below. In the plug-retained position, fluid is permitted to flow through the canister-housing annulus and around the valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.