Pressure compensation multi tubular safety joint
US4880257A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 23, 1983 |
| Grant date | Nov 14, 1989 |
| Priority date | — |
| Expiry date | Mar 23, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S285/92
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pressure compensation multi tubular safety joint for use with tubular sections is disclosed wherein a weak link is included that causes the joint to separate under axial load before permanent damage is done to the tubular sections but which compensates for pressure changes in the tubular sections. The joint includes two members, one of which has means for permitting the separation under conditions where the load is only partially axial. The joint further includes means for pre-stressing the joint to relieve the load on the weak link while the joint is lowered into position and further means for relieving the pre-stress through the flowing fluid in the sections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.