Casing hanger
US4494778A · kind A · utility
13Cited by
5References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 22, 1982 |
| Grant date | Jan 22, 1985 |
| Priority date | — |
| Expiry date | Mar 22, 2002 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/0422
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A casing hanger for hanging well casing and sealing the well pressure from the atmosphere. The casing hanger comprises a cooperating slip and slip bowl adapted to grip and retain the well casing when they abut a cooperating shoulder on the casing head whereupon the casing hanger will be in its operating position. A seal is adapted to be compressed when the casing hanger is moved downwardly and forms the seal when the casing hanger reaches its operating position. A manually adjustable bolt can increase or decrease the seal pressure without disturbing the well casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.