Patent · US Active

Annular seal for expanded pipe with one way flow feature

US8596370B2 · kind B2 · utility

0Cited by

9References

20Claims

0Family size

Assignee

Baker Hughes Holdings LLC · US

Inventors

Ines Rex · Burgdorf, DE
Keven O'Connor · Houston, US
Joerg Lehr · Sulingen, DE

Key dates

Filing date	Sep 7, 2011
Grant date	Dec 3, 2013
Priority date	—
Expiry date	Sep 7, 2031

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B33/126
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

The seal has a base ring that expands with the underlying supporting tubular. Extending from the base ring is a pleated structure with segments folded over each other so that the run in shape is small and up against the supporting tubular for run in. The pleated segments can have internal stiffeners that also add a bias radially outwardly when the structure is freed to move in that direction. A retaining band keeps the assembly retracted until tubular expansion defeats the band to allow the unitary structure to move out radially to the wellbore or surrounding tubular. The pleated portion unfolds and spans outwardly from the base ring to retain pressure differential in one direction while allowing fluid flow in the opposite direction. The assembly can be attached to a swage device so that pressure from above can drive one or more swage members to expand a tubular.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.