Dual wiper plug system
US9200499B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2011 |
| Grant date | Dec 1, 2015 |
| Priority date | — |
| Expiry date | Jun 23, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A dual wiper plug system having a first wiper including a first body having a first bore therethrough, and at least one wiper fin disposed around the body, a second wiper disposed axially above the first wiper, the second wiper including a second body having a second bore therethrough and a first shoulder formed on the inner surface of the second body, and at least one wiper fin disposed around the body, and a first collet ring coupled to the first wiper and including at least one collet finger extending axially upward, and a collet head disposed on an upper end of the collet finger and configured to engage the first shoulder of the second body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.