Cementing plug
US4756365A · kind A · utility
14Cited by
14References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 4, 1986 |
| Grant date | Jul 12, 1988 |
| Priority date | — |
| Expiry date | Sep 4, 2006 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A wiper for a wellbore plug which is rigid for breaking off breakaway members and wellbore plug having a first wiper flexible enough to bypass breakaway members and a second wiper rigid enough for breaking off the bypassed members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.