Method and apparatus for independent support of well pipe hangers
US4550782A · kind A · utility
101Cited by
2References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 6, 1982 |
| Grant date | Nov 5, 1985 |
| Priority date | — |
| Expiry date | Dec 6, 2002 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/01
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In well installations subjected to high internal fluid pressures, hangers for long casing strings are supported independently in the upright bore of a wellhead body or other support member without requiring that the hangers be stacked one atop another or that the bore diameter be stepped to provide an upwardly exposed shoulder for each hanger. All hangers save the lowermost hanger are supported by an annular support member engaged in a groove in the wellhead body, with no load being transferred from an upper hanger to a lower hanger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.