Patent · US Active

Sealing a bore or open annulus

US10876380B2 · kind B2 · utility

0Cited by

13References

23Claims

0Family size

Assignee

MAERSK OLIE OG GAS A/S · DK

Inventors

Hans Van Dongen · Copenhagen, DK
Hans-Henrik Kogsboll · Copenhagen, DK

Key dates

Filing date	Jun 9, 2014
Grant date	Dec 29, 2020
Priority date	—
Expiry date	Jun 9, 2034

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B43/108
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

Disclosed is a method for use in restricting or sealing a bore. A tubular is expanded in the bore to cause the tubular to split and be extended towards a wall of the bore. A straddle is located within the tubular so as to extend across the region of the tubular which has been split, and expanded to seal the split in the tubular. Also disclosed is apparatus comprising one or more expansion tools and a straddle, for use in sealing or restricting a bore. The apparatus may be used in conjunction with a tubular as disclosed herein, having one or more weak zones adapted to preferentially split under the action of an expansion tool.

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