Full bore tubing hanger system
US6012519A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1998 |
| Grant date | Jan 11, 2000 |
| Priority date | — |
| Expiry date | Feb 9, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A full bore tubing hanger system for supporting a tubing string in a wellhead includes a hanger body positioned on the wellhead and having a vertical opening therethrough defined by a plurality of spaced apart circumferential enlarged internal diameter support recesses, each support recess providing a lower circumferential radial ledge surface and an upper frusto-conically shaped surface. A tubular tubing hanger is removably positionable within the hanger body vertical opening and has threads at the lower end thereof by which tubing is attached to it. A segmented cage is positioned on the external surface of the tubing hanger and slidable between a lower and an upper position, in the lower position the segmented cage is retracted with respect to the external surface of the tubing hanger. The segmented cage has spaced apart external circumferential support surfaces that, when the tubing hanger is downwardly positioned, engage the hanger body support recesses so that the tubing hanger is supported by the cage. The segmented cage is inwardly radially retractable when upward force is applied to the tubing hanger so that the tubing hanger and cage may be removed from within the hanger b…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.