Case cementing method and system
US5323858A · kind A · utility
101Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1992 |
| Grant date | Jun 28, 1994 |
| Priority date | — |
| Expiry date | Nov 18, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system for cementing well casing in a bore hole utilizes only top and bottom cementing plugs. The well casing has on its lower end, an inwardly extending lip to engage a latch on the lower portion of the bottom cementing plug. The bottom cementing plug has a through passage that is covered on the top by a diaphragm and on the bottom by another diaphragm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.