Apparatus and methods for deploying cementing plugs
US8887807B2 · kind B2 · utility
2Cited by
3References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2009 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | Mar 3, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/165
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for installing cement plugs into a well, comprising a protective sleeve having one end adapted to be attached to the end of a drill pipe and arranged to carry a cementing plug around its outer surface such that a dart passing through the drill pipe can pass through the sleeve and engage only on formations on the plug to withdraw it from the end of the sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.