Cementing apparatus and method
US5024273A · kind A · utility
102Cited by
7References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 1990 |
| Grant date | Jun 18, 1991 |
| Priority date | — |
| Expiry date | Apr 4, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/142
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus is disclosed for use in placing cement within the annulus between a casing string and a well bore in which the casing string is suspended, such apparatus including a stage collar connectible as part of the casing string and having a packing element mounted thereon and adapted to be inflated into engagement with the well bore, one or more side ports through which cement may be circulated into the annulus above the packer, tubular members or sleeves for opening and closing the ports following inflation of the packing element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.