Equipment for remote launching of cementing plugs
US8327937B2 · kind B2 · utility
14Cited by
22References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2009 |
| Grant date | Dec 11, 2012 |
| Priority date | — |
| Expiry date | Jan 7, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/165
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for remotely launching cementing plugs is configured such that the length of a dart need not necessarily be the same as the corresponding plug to be launched. A hydraulic-liquid reservoir and a piston are incorporated into a plug-launching system. The size of the reservoir may be adjusted such that the axial displacement of the piston after the dart lands is sufficient to cause the expulsion of a plug from the apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.