Plug for use in wellbore operations and apparatus for launching said plug
US6311771A · kind A · utility
18Cited by
9References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2000 |
| Grant date | Nov 6, 2001 |
| Priority date | — |
| Expiry date | Jul 31, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/165
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for launching at least two plugs, said apparatus comprising a mandrel (2), a lower plug (22) and an upper plug (21) releasably disposed with respect to said mandrel (2), wherein said upper plug (21) comprises a body (23) having a flow path (24) therethrough and a cap (25) for blocking fluid flow through said flow path (24) characterized in that said cap (25) is detachable from said body (23) in use if the upper plug (21) is prematurely ejected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.