Apparatus for cementing a casing string
US5411095A · kind A · utility
56Cited by
4References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1993 |
| Grant date | May 2, 1995 |
| Priority date | — |
| Expiry date | Mar 29, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and apparatus for cementing a casing string utilizes a port collar which may be hydraulically opened and mechanically closed, and permits the passage of downhole tools through the port collar, without opening the port collar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.