Non-rotating cementing plug with molded inserts
US5095980A · kind A · utility
79Cited by
2References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 15, 1991 |
| Grant date | Mar 17, 1992 |
| Priority date | — |
| Expiry date | Feb 15, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/167
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An easily drillable non-metallic, non-rotating plug set for use in well cementing operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.