Equipment for remote launching of cementing plugs
US8622131B2 · kind B2 · utility
3Cited by
28References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2012 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | Oct 15, 2032 |
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 is not necessarily 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.